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Artykuły w czasopismach na temat "Gas sensing; Plasmonic applications"
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Tittl, Andreas, Harald Giessen, and Na Liu. "Plasmonic gas and chemical sensing." Nanophotonics 3, no. 3 (2014): 157–80. http://dx.doi.org/10.1515/nanoph-2014-0002.
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AbstractSensitive and robust detection of gases and chemical reactions constitutes a cornerstone of scientific research and key industrial applications. In an effort to reach progressively smaller reagent concentrations and sensing volumes, optical sensor technology has experienced a paradigm shift from extended thin-film systems towards engineered nanoscale devices. In this size regime, plasmonic particles and nanostructures provide an ideal toolkit for the realization of novel sensing concepts. This is due to their unique ability to simultaneously focus light into subwavelength hotspots of the electromagnetic field and to transmit minute changes of the local environment back into the farfield as a modulation of their optical response. Since the basic building blocks of a plasmonic system are commonly noble metal nanoparticles or nanostructures, plasmonics can easily be integrated with a plethora of chemically or catalytically active materials and compounds to investigate processes ranging from hydrogen absorption in palladium to the detection of trinitrotoluene (TNT). In this review, we will discuss a multitude of plasmonic sensing strategies, spanning the technological scale from simple plasmonic particles embedded in extended thin films to highly engineered complex plasmonic nanostructures. Due to their flexibility and excellent sensing performance, plasmonic structures may open an exciting pathway towards the detection of chemical and catalytic events down to the single molecule level.
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Tabassum, Shawana, SK Nayemuzzaman, Manish Kala, Akhilesh Kumar Mishra, and Satyendra Kumar Mishra. "Metasurfaces for Sensing Applications: Gas, Bio and Chemical." Sensors 22, no. 18 (2022): 6896. http://dx.doi.org/10.3390/s22186896.
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Performance of photonic devices critically depends upon their efficiency on controlling the flow of light therein. In the recent past, the implementation of plasmonics, two-dimensional (2D) materials and metamaterials for enhanced light-matter interaction (through concepts such as sub-wavelength light confinement and dynamic wavefront shape manipulation) led to diverse applications belonging to spectroscopy, imaging and optical sensing etc. While 2D materials such as graphene, MoS2 etc., are still being explored in optical sensing in last few years, the application of plasmonics and metamaterials is limited owing to the involvement of noble metals having a constant electron density. The capability of competently controlling the electron density of noble metals is very limited. Further, due to absorption characteristics of metals, the plasmonic and metamaterial devices suffer from large optical loss. Hence, the photonic devices (sensors, in particular) require that an efficient dynamic control of light at nanoscale through field (electric or optical) variation using substitute low-loss materials. One such option may be plasmonic metasurfaces. Metasurfaces are arrays of optical antenna-like anisotropic structures (sub-wavelength size), which are designated to control the amplitude and phase of reflected, scattered and transmitted components of incident light radiation. The present review put forth recent development on metamaterial and metastructure-based various sensors.
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Kalvoda, Ladislav, Jaroslava Jakoubková, Milan Burda, Pavel Kwiecien, Ivan Richter, and Jaromír Kopeček. "Fiber Optic Sensor of Ammonia Gas Using Plasmonic Extraordinary Optical Transmission." Sensors 23, no. 8 (2023): 4065. http://dx.doi.org/10.3390/s23084065.
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While standard surface plasmon resonance (bio) sensing, relaying on propagating surface plasmon polariton sensitivity on homogeneous metal/dielectric boundaries, represents nowadays a routine sensing technique, other alternatives, such as inverse designs with nanostructured plasmonic periodic hole arrays, have been far less studied, especially in the context of gas sensing applications. Here, we present a specific application of such a plasmonic nanostructured array for ammonia gas sensing, based on a combination of fiber optics, extraordinary optical transmission (EOT) effect, and chemo-optical transducer selectively sensitive to ammonia gas. The nanostructured array of holes is drilled in a thin plasmonic gold layer by means of focused ion beam technique. The structure is covered by chemo-optical transducer layer showing selective spectral sensitivity towards gaseous ammonia. Metallic complex of 5-(4′-dialkylamino-phenylimino)-quinoline-8-one dye soaked in polydimethylsiloxane (PDMS) matrix is used in place of the transducer. Spectral transmission of the resulting structure and its changes under exposition to ammonia gas of various concentrations is then interrogated by fiber optics tools. The observed VIS-NIR EOT spectra are juxtaposed to the predictions performed by the rigorous Fourier modal method (FMM), providing useful theoretical feedback to the experimental data, and ammonia gas sensing mechanism of the whole EOT system and its parameters are discussed.
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Maciak, Erwin. "Palladium thin films for plasmonic hydrogen gas sensing." Photonics Letters of Poland 11, no. 2 (2019): 56. http://dx.doi.org/10.4302/plp.v11i2.914.
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In this study, I prepared BK7 glass slides coated by palladium (Pd) layer by PVD technique. These samples have been employed as plasmon active structures in classic Kretschmann-based SPR set-up. The application of H2 sensing structures based on palladium plasmonic active thin films have been tested and investigated. Hydrogen sensing properties of Pd films were investigated at room temperature The reflectances of p-polarized light from Pd thin films as a function of angle of incidence and wavelength were measured in synthetic air (or nitrogen) and in gas mixtures including hydrogen. Variations of the reflectance in the presence of hydrogen gas at room temperature revealed that the samples can sense hydrogen in a wide range of concentration (0–2% vol/vol) without saturation behavior. The dynamic properties with various concentration of H2 at low temperature and dry gas mixtures was investigated and the effects of these factors on the hydrogen sensing properties were analyzed. Full Text: PDF ReferencesG. Korotcenkov, Handbook of Gas Sensor Materials: Properties, Advantages, and Shortcomings for Applications (Springer, New York 2013). CrossRef W. Jakubik, M. Urbanczyk, E. Maciak, "SAW hydrogen gas sensor based on WO3 and Pd nanostructures", Procedia Chemistry 1 (1), 200 (2009). CrossRef W. Jakubik, M. Urbanczyk, E. Maciak, T. Pustelny, "Bilayer Structures of NiOx and Pd in Surface Acoustic Wave and Electrical Gas Sensor Systems", Acta Physica Polonica A 116(3), 315 (2009). CrossRef E. Maciak, Z. Opilski, "Pd/V2O5 fiber optic hydrogen gas sensor", J. Phys. France IV 129, 137 (2005). CrossRef E. Maciak,. "Fiber optic sensor for H2 gas detection in the presence of methane based on Pd/WO3 low-coherence interferometric structure", Proc. SPIE 10455, UNSP 104550W (2017). CrossRef X. Bevenot, A. Truillet, C. Veillas, H. Gagnaire, M. Clement, "Hydrogen leak detection using an optical fibre sensor for aerospace applications", Sens. Actuators B 67, 57 (2000). CrossRef J. Homola, S.S. Yee, G. Gauglitz, "Surface plasmon resonance sensors: review", Sensors and Actuators B 54, 3 (1999). CrossRef H. Raether, Surface plasmons on smooth and rough surfaces and on gratings (Springer-Verlag, Berlin-Heidelberg 1988). CrossRef P. Tobiska, O. Hugon, A. Trouillet, H.Gagnarie, "An integrated optic hydrogen sensor based on SPR on palladium", Sensors and Actuators, B 74, 168 (2001). CrossRef Z. Opilski, E. Maciak, "Optical hydrogen sensor employing the phenomenon of the surface plasmons resonance in the palladium layer", Proc. SPIE 5576, 202 (2004). CrossRef T. Pustelny, E. Maciak, Z. Opilski, A. Piotrowska, E. Papis, K. Golaszewska, "Investigation of the ZnO sensing structure on NH3 action by means of the surface plasmon resonance method", European Physical Journal-Special Topics 154, 165 (2008). CrossRef E. Maciak, M. Procek, K. Kępska, A. Stolarczyk, "Study of optical and electrical properties of thin films of the conducting comb-like graft copolymer of polymethylsiloxane with poly(3-hexyltiophene) and poly(ethylene) glycol side chains for low temperature NO2 sensing", Thin Solid Films 618, 277 (2016). CrossRef
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An, Tongge, Jiahong Wen, Zhichao Dong, et al. "Plasmonic Biosensors with Nanostructure for Healthcare Monitoring and Diseases Diagnosis." Sensors 23, no. 1 (2022): 445. http://dx.doi.org/10.3390/s23010445.
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Nanophotonics has been widely utilized in enhanced molecularspectroscopy or mediated chemical reaction, which has major applications in the field of enhancing sensing and enables opportunities in developing healthcare monitoring. This review presents an updated overview of the recent exciting advances of plasmonic biosensors in the healthcare area. Manufacturing, enhancements and applications of plasmonic biosensors are discussed, with particular focus on nanolisted main preparation methods of various nanostructures, such as chemical synthesis, lithography, nanosphere lithography, nanoimprint lithography, etc., and describing their respective advances and challenges from practical applications of plasmon biosensors. Based on these sensing structures, different types of plasmonic biosensors are summarized regarding detecting cancer biomarkers, body fluid, temperature, gas and COVID-19. Last, the existing challenges and prospects of plasmonic biosensors combined with machine learning, mega data analysis and prediction are surveyed.
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Lv, Jiangtao, Eunice Sok Ping Leong, Xiaoxiao Jiang, et al. "Plasmon-Enhanced Sensing: Current Status and Prospects." Journal of Nanomaterials 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/474730.
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By combining different plasmonic nanostructures with conventional sensing configurations, chemical/biosensors with significantly enhanced device performance can be achieved. The fast development of plasmon-assisted devices benefits from the advance of nanofabrication technology. In this review, we first briefly show the experimental configurations for testing plasmon enhanced sensing signals and then summarize the classic nanogeometries which are extensively used in sensing applications. By design, dramatic increment of optical signals can be obtained and further applied to gas, refractive index and liquid sensing.
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Manera, Maria Grazia, Gabriele Giancane, Simona Bettini та ін. "MagnetoPlasmonic Waves/HOMO-LUMO Free π-Electron Transitions Coupling in Organic Macrocycles and Their Effect in Sensing Applications". Chemosensors 9, № 10 (2021): 272. http://dx.doi.org/10.3390/chemosensors9100272.
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Optical and magneto-optical surface plasmon resonance (MOSPR) characterization and preliminary sensing test onto single- and multi-layers of two organic macrocycles have been performed; TbPc2(OC11H21)8 phthalocyanine and CoCoPo2 porphyrin were deposited by the Langmuir-Schäfer (LS) technique onto proper Au/Co/Au magneto-optical transducers. Investigations of the MOSPR properties in Kretschmann configuration by angular modulation, gives us an indication about the potential discrimination of two organic macrocycles with absorption electronic transition in and out of the propagating plasmon energy spectral range. An improved molecular vapors sensitivity increase by the MOSPR sensing probe can be demonstrated depending on the overlap between the plasmonic probe energy and the absorption electronic transitions of the macrocycles under investigation. If the interaction between the plasmon energy and molecular HOMO-LUMO transition is preserved, a variation in the complex refractive index takes place. Under this condition, the magneto-plasmonic effect reported as 1/|MOSPR| signal allows us to increase the detection of molecules deposited onto the plasmonic transducer and their gas sensing capacity. The detection mechanism appears strongly enhanced if the Plasmon Wave/HOMO-LUMO transitions energy are in resonance. Under coupling conditions, a different volatile organic compounds (VOC) sensing capability has been demonstrated using n-butylamine as the trial molecule.
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Meira, Diana I., Manuela Proença, Rita Rebelo, et al. "Chitosan Micro-Membranes with Integrated Gold Nanoparticles as an LSPR-Based Sensing Platform." Biosensors 12, no. 11 (2022): 951. http://dx.doi.org/10.3390/bios12110951.
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Currently, there is an increasing need to develop highly sensitive plasmonic sensors able to provide good biocompatibility, flexibility, and optical stability to detect low levels of analytes in biological media. In this study, gold nanoparticles (Au NPs) were dispersed into chitosan membranes by spin coating. It has been demonstrated that these membranes are particularly stable and can be successfully employed as versatile plasmonic platforms for molecular sensing. The optical response of the chitosan/Au NPs interfaces and their capability to sense the medium’s refractive index (RI) changes, either in a liquid or gas media, were investigated by high-resolution localized surface plasmon resonance (HR-LSPR) spectroscopy, as a proof of concept for biosensing applications. The results revealed that the lowest polymer concentration (chitosan (0.5%)/Au-NPs membrane) presented the most suitable plasmonic response. An LSPR band redshift was observed as the RI of the surrounding media was incremented, resulting in a sensitivity value of 28 ± 1 nm/RIU. Furthermore, the plasmonic membrane showed an outstanding performance when tested in gaseous atmospheres, being capable of distinguishing inert gases with only a 10−5 RI unit difference. The potential of chitosan/Au-NPs membranes was confirmed for application in LSPR-based sensing applications, despite the fact that further materials optimization should be performed to enhance sensitivity.
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Butt, Muhammad Ali ALI, and Nikolay Kazanskiy. "Enhancing the sensitivity of a standard plasmonic MIM square ring resonator by incorporating the Nano-dots in the cavity." Photonics Letters of Poland 12, no. 1 (2020): 1. http://dx.doi.org/10.4302/plp.v12i1.902.
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We studied the metal-insulator-metal square ring resonator design incorporated with nano-dots that serve to squeeze the surface plasmon wave in the cavity of the ring. The E-field enhances at the boundaries of the nano-dots providing a strong interaction of light with the surrounding medium. As a result, the sensitivity of the resonator is highly enhanced compared to the standard ring resonator design. The best sensitivity of 907 nm/RIU is obtained by placing seven nano-dots of radius 4 nm in all four sides of the ring with a period (ᴧ)= 3r. The proposed design will find applications in biomedical science as highly refractive index sensors. Full Text: PDF References:Z. Han, S. I. Bozhevolnyi. "Radiation guiding with surface plasmon polaritons", Rep. Prog. Phys. 76, 016402 (2013). [CrossRef]N.L. Kazanskiy, S.N. Khonina, M.A. Butt. "Plasmonic sensors based on Metal-insulator-metal waveguides for refractive index sensing applications: A brief review", Physica E 117, 113798 (2020). [CrossRef]D.K. Gramotnev, S.I. Bozhevolnyi. "Plasmonics beyond the diffraction limit", Nat. Photonics 4, 83 (2010). [CrossRef]A.N.Taheri, H. Kaatuzian. "Design and simulation of a nanoscale electro-plasmonic 1 × 2 switch based on asymmetric metal–insulator–metal stub filters", Applied Optics 53, 28 (2014). [CrossRef]P. Neutens, L. Lagae, G. Borghs, P. V. Dorpe. "Plasmon filters and resonators in metal-insulator-metal waveguides", Optics Express 20, 4 (2012). [CrossRef]M.A. Butt, S.N. Khonina, N. L. Kazanskiy. "Metal-insulator-metal nano square ring resonator for gas sensing applications", Waves in Random and complex media [CrossRef]M.A.Butt, S.N.Khonina, N.L.Kazanskiy. "Hybrid plasmonic waveguide-assisted Metal–Insulator–Metal ring resonator for refractive index sensing", Journal of Modern Optics 65, 1135 (2018). [CrossRef]M.A.Butt, S.N. Khonina, N.L. Kazanskiy, "Highly sensitive refractive index sensor based on hybrid plasmonic waveguide microring resonator", Waves in Random and complex media [CrossRef]Y. Fang, M. Sun. "Nanoplasmonic waveguides: towards applications in integrated nanophotonic circuits", Light:Science & Applications 4, e294 (2015). [CrossRef]H. Lu, G.X. Wang, X.M. Liu. "Manipulation of light in MIM plasmonic waveguide systems", Chin Sci Bull [CrossRef]J.N. Anker et al. "Biosensing with plasmonic nanosensors", Nature Materials 7, 442 (2008). [CrossRef]M.A.Butt, S.N. Khonina, N.L. Kazanskiy. Journal of Modern Optics 66, 1038 (2019).[CrossRef]Z.-D. Zhang, H.-Y. Wang, Z.-Y. Zhang. "Fano Resonance in a Gear-Shaped Nanocavity of the Metal–Insulator–Metal Waveguide", Plasmonics 8,797 (2013) [CrossRef]Y. Yu, J. Si, Y. Ning, M. Sun, X. Deng. Opt. Lett. 42, 187 (2017) [CrossRef]B.H.Zhang, L-L. Wang, H-J. Li et al. "Two kinds of double Fano resonances induced by an asymmetric MIM waveguide structure", J. Opt. 18,065001 (2016) [CrossRef]X. Zhao, Z. Zhang, S. Yan. "Tunable Fano Resonance in Asymmetric MIM Waveguide Structure", Sensors 17, 1494 (2017) [CrossRef]J. Zhou et al. "Transmission and refractive index sensing based on Fano resonance in MIM waveguide-coupled trapezoid cavity", AIP Advances 7, 015020 (2017) [CrossRef]V. Perumal, U. Hashim. "Advances in biosensors: Principle, architecture and applications", J. Appl. Biomed. 12, 1 (2014)[CrossRef]H.Gai, J. Wang , Q. Tian, "Modified Debye model parameters of metals applicable for broadband calculations", Appl. Opt. 46 (12), 2229 (2007) [CrossRef]
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Li, Jun, and Nicholas A. Kotov. "Circular extinction of plasmonic silver nanocaps and gas sensing." Faraday Discussions 186 (2016): 345–52. http://dx.doi.org/10.1039/c5fd00138b.
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Chiral plasmonic nanostructures exhibit strong rotatory optical activity and are expected to enrich the field of metaoptical materials. Potential applications of chiroplasmonic nanostructures include circular polarizers, optical polarization detectors, asymmetric catalysts, and sensors. However, chiral plasmonic materials require subwavelength structural control and involve laborious chemical or lithographic procedures for their manufacturing. Moreover, strong rotatory activity of subwavelength structures whose chirality was imparted by microfabrication, has been obtained for the red and infrared parts of the spectrum but faces new challenges for the blue and violet spectral ranges even with plasmonic materials with plasmonic bands in the 200–400 nm window. In this study, we address this problem by preparing chiral subwavelength nanostructures by glancing angle sputtering of metallic silver on ZnO nanopillar arrays. Silver deposition in two different planes is a convenient method for preparation of silver chiroplasmonic nanocaps (Ag CPNCs) with controlled asymmetry. Circular dichroism spectroscopy was used to examine the circular extinction for the left-handed nanocaps (L-CPNCs) with understanding that not only circular dichroism but also many other optical effects contribute to the amplitude of these bands. The pillared silver films exhibit circular extinction in the violet area of the electromagnetic spectrum. Partial oxidation of Ag to Ag<sub>x</sub>O causes the absorption and corresponding circular extinction band obtained using a conventional CD spectrometer at 400–525 nm to increase and shift. This optical material may be used to detect oxygen and extends the spectrum of application of chiroplasmonic materials to gas sensing.
Rozprawy doktorskie na temat "Gas sensing; Plasmonic applications"
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Maake, Popoti Jacqueline. "Photovoltaic and gas sensing applications of transitional metal nanocomposites of poly(3-hexylthiophene)-titanium dioxide." University of Western Cape, 2021. http://hdl.handle.net/11394/8240.
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>Magister Scientiae - MSc<br>This thesis starts with the reviewing of studies on the loading of noble metals and nanostructured metal oxides into bulk heterojunction organic solar cell device architectures. The reviews focused on the innovative developments in the use of various fullerene derivatives as electron acceptors in organic solar cells. It additionally reflected on the effect of metallic nanoparticles (NPs), such as gold (Au) and silver (Ag), on the performance of organic solar cells. Besides the metallic NPs, the effect of metal oxide nanoparticle loading, e.g. CuO, ZnO and TiO2, on the organic solar cell performance, and the use of noble metals doped TiO2 on the gas sensing application were reviewed.<br>2024
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Perino, Mauro. "Characterization of plasmonic surfaces for sensing applications." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424012.
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My research activity during the Ph. D. period has been focused on the simulation and the experimental characterization of Surface Plasmon Polaritons (SPP).
Surface Plasmon Polaritons are evanescent electromagnetic waves that propagate along a metal/dielectric interface. Since their excitation momentum is higher than that of the photons inside the dielectric medium, they cannot be excited just by lighting the interface, but they need some particular coupling configurations. Among all the possible configurations the Kretschmann and the grating are those largely widespread.
When the SPP coupling conditions are reached, abrupt changes of some components of the light reflected or transmitted at the metal/dielectric interface appear. Usually this resonances are characterized by a minimum of the reflectance acquired as a function of the incident angle or light wavelength. Several experimental methods are available to detect these SPP resonances, for instance by monitoring the light intensity, its polarization or its phase.
Changes in the physical conditions of the metal/dielectric interface produce some changes of the SPP coupling constant, and consequently a shift in the resonance position. If these changes derive from a molecular detection process, it is possible to correlate the presence of the target molecules to the resonance variations, thus obtaining a dedicated SPP sensor.
I focused the first part of my Ph.D. activity on the simulation of SPP resonances by using several numerical techniques, such as the Rigorous Coupled Wave Analysis method, the Chandezon method, and the Finite Element Method implemented through Comsol v3.5.
I simulated the SPP resonance in the Kretschmann coupling configuration for plane and nano-grating structured metal/dielectric interfaces. Afterward, I calculated the SPP resonance behaviour for grating and bi-dimensional periodic structures lighted in the conical configuration. Furthermore, I analysed the correlations between the grating coupling method and the Kretschamann coupling method.
Through all these simulations, I studied the sensitivity of the different SPP resonances to the refractive index variation of the dielectric in contact with the metal. In this way, I was able to find a new parameter suitable for describing the SPP resonance, i.e., the azimuthal angle. By considering this particular angle, the sensitivity of the SPP resonances could be properly set according to the experimental needs and, even more important, noticeably increased to high values.
Experimentally I used two opto-electronic benches, one for the Kretschmann configuration and one for the conical mounting configuration. I have performed experimental measurements, in order to compare the experimental data with the simulations. In particular the following conditions were tested:
• Plane interface, Kretschmann configuration
• Nanostructured grating, Kretschmann configuration
• Nanostructured grating, Conical configuration
I focused my attention on the nano-structured grating in conical mounting configuration. I found an innovative way to characterize its SPP resonances, by measuring the transmitted signal as a function of the incident and azimuthal angles. The transmittance and the azimuthal sensitivities were characterized with the gratings in both air and water.
In order to study the experimental azimuthal sensitivity, I changed the liquid refractive index in contact with the grating by using different water/glycerol solutions. Moreover, I functionalized the surface by using thiolated molecules that form Self Assembled Monolayer onto the metallic layer. In this way, I was able to change the SPP coupling constants and detect the corresponding azimuthal resonance shifts. I also detected the immobilization of an antibody layer onto the metallic surface of the plasmonic interface.
All the devices I used in the experimental measurements were produced by the University spin off Next Step Engineering.<br>Durante il mio periodo di dottorato in Scienza e Tecnologia dell’Informazione l’attività di ricerca principale è stata focalizzata sulla caratterizzazione, simulativa e sperimentale, dei plasmoni di superficie.
I plasmoni di superficie sono onde elettromagnetiche evanescenti che si propagano all’interfaccia tra un mezzo metallico ed un mezzo dielettrico. Il loro vettore d’onda è più elevato rispetto a quello della luce nel mezzo dielettrico. Per poter quindi generare l’eccitazione si devono utilizzare particolari tecniche di accoppiamento. I due metodi più diffusi sono l’accoppiamento Kretschmann e l’accoppiamento tramite reticolo.
Una volta raggiunte le condizioni di accoppiamento dei plasmoni di superficie, si realizza il fenomeno della risonanza plasmonica, la quale si manifesta attraverso brusche variazioni nelle componenti della luce riflessa o trasmessa dalla superficie. Tipicamente si può registrare un minimo della riflettanza in funzione dell’angolo di incidenza della luce sulla superficie. Esistono, tuttavia, anche altre modalità per registrare e misurare queste risonanze, come ad esempio monitorando intensità, polarizzazione o fase della luce trasmessa e riflessa dalla superficie, in funzione della sua lunghezza d’onda o dei sui angoli di incidenza.
Le variazioni chimico/fisiche che avvengono all’interfaccia metallo/dielettrico, modificando la costante di accoppiamento plasmonica, cambiano le condizioni di risonanza. Nel caso in cui le variazioni all’interfaccia siano dovute ad un processo di riconoscimento molecolare è possibile rilevare le molecole d’interesse valutando i cambiamenti della risonanza plasmonica, fornendo così l’opportunità per l’implementazione di sensori specifici.
L’attività di dottorato è stata focalizzata innanzitutto sullo studio teorico del comportamento della risonanza plasmonica, utilizzando varie tecniche di simulazione numerica: il metodo RCWA (Rigorous Coupled Wave Analysis), Il metodo di Chandezon ed il metodo agli elementi finiti, implementato tramite Comsol v3.5.
Ho poi affrontato lo studio, tramite simulazioni, delle risonanze di superficie in configurazione Kretschmann, sia per interfacce metallo/dielettrico piane sia per interfacce nano-strutturate. Considerando una configurazione conica, ho simulato le risonanze di superficie per nano-strutture reticolari e per nano-strutture bi-dimensionali periodiche. Inoltre ho analizzato il legame tra le modalità di accoppiamento grating e Kretschmann.
Tramite queste simulazioni mi è stato possibile valutare e studiare la sensibilità delle varie risonanze plasmoniche alla variazione di indice di rifrazione, quando essa avviene all’interfaccia metallo/dielettrico. È stato così possibile identificare un nuovo parametro per descrivere la risonanza plasmonica e la sua sensibilità, ossia l’angolo azimutale, definito come l’angolo tra il vettore del grating ed il piano di scattering della luce. Considerando questo particolare angolo, la sensibilità del sensore può essere controllata con un’opportuna regolazione degli altri parametri coinvolti nell’eccitazione plasmonica, consentendole di raggiungere valori molto elevati.
Successivamente, grazie all’utilizzo di due banchi, uno per la configurazione Kretschmann ed uno per la misura di reticoli nano-strutturati in configurazione conica, ho realizzato delle campagne di misure sperimentali. E’ stato così possibile confrontare i risultati sperimentali con le simulazioni numeriche per le seguenti condizioni:
• Interfaccia piana, configurazione Kretschmann
• reticolo nano-strutturato, configurazione Kretschmann
• reticolo nano-strutturato, configurazione conica
L’attività sperimentale si è particolarmente focalizzata sul reticolo nano-strutturato, sia per l’innovativa modalità di caratterizzazione delle sue risonanze plasmoniche (valutazione del segnale trasmesso in funzione dell’angolo di incidenza e dell’angolo azimutale), sia per l’elevata sensibilità ottenuta valutando la variazione dell’angolo azimutale. La caratterizzazione è stata effettuata sia per il reticolo esposto all’aria che per il reticolo immerso in un liquido (tipicamente acqua).
Per poter verificare il comportamento della sensibilità azimutale ho variato l’indice di rifrazione del liquido in contatto con la superficie utilizzando soluzioni miste di acqua e glicerolo. Inoltre, tramite tecniche di funzionalizzazione della superficie, ovvero applicando delle molecole thiolate che vengono adsorbite sulla parte metallica dell’interfaccia, mi è stato possibile variare le costanti di accoppiamento plasmonico, in modo da verificare la capacità del dispositivo di rilevare l’avvenuta creazione di uno strato molecolare sulla superficie. Inoltre ho positivamente verificato la capacità di immobilizzare uno strato di anticorpi sulla superficie plasmonica.
Tutte le misure sperimentali che ho svolto in questa tesi sono state effettuate su sensori con superfici piane o nano-strutturate prodotte dallo spin-off universitario Next Step Engineering, con il quale ho collaborato durante il percorso di ricerca.
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Ahmadivand, Arash. "Plasmonic Nanoplatforms for Biochemical Sensing and Medical Applications." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3576.
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Plasmonics, the science of the excitation of surface plasmon polaritons (SPP) at the metal-dielectric interface under intense beam radiation, has been studied for its immense potential for developing numerous nanophotonic devices, optical circuits and lab-on-a-chip devices. The key feature, which makes the plasmonic structures promising is the ability to support strong resonances with different behaviors and tunable localized hotspots, excitable in a wide spectral range. Therefore, the fundamental understanding of light-matter interactions at subwavelength nanostructures and use of this understanding to tailor plasmonic nanostructures with the ability to sustain high-quality tunable resonant modes are essential toward the realization of highly functional devices with a wide range of applications from sensing to switching.
We investigated the excitation of various plasmonic resonance modes (i.e. Fano resonances, and toroidal moments) using both optical and terahertz (THz) plasmonic metamolecules. By designing and fabricating various nanostructures, we successfully predicted, demonstrated and analyzed the excitation of plasmonic resonances, numerically and experimentally. A simple comparison between the sensitivity and lineshape quality of various optically driven resonances reveals that nonradiative toroidal moments are exotic plasmonic modes with strong sensitivity to environmental perturbations. Employing toroidal plasmonic metasurfaces, we demonstrated ultrafast plasmonic switches and highly sensitive sensors. Focusing on the biomedical applications of toroidal moments, we developed plasmonic metamaterials for fast and cost-effective infection diagnosis using the THz range of the spectrum. We used the exotic behavior of toroidal moments for the identification of Zika-virus (ZIKV) envelope proteins as the infectious nano-agents through two protocols: 1) direct biding of targeted biomarkers to the plasmonic metasurfaces, and 2) attaching gold nanoparticles to the plasmonic metasurfaces and binding the proteins to the particles to enhance the sensitivity. This led to developing ultrasensitive THz plasmonic metasensors for detection of nanoscale and low-molecular-weight biomarkers at the picomolar range of concentration.
In summary, by using high-quality and pronounced toroidal moments as sensitive resonances, we have successfully designed, fabricated and characterized novel plasmonic toroidal metamaterials for the detection of infectious biomarkers using different methods. The proposed approach allowed us to compare and analyze the binding properties, sensitivity, repeatability, and limit of detection of the metasensing devices
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Prasad, Janak [Verfasser]. "Sensing applications of biofunctionalised plasmonic gold nanoparticles / Janak Prasad." Mainz : Universitätsbibliothek Mainz, 2015. http://d-nb.info/1070108898/34.
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Hajebifard, Akram. "Plasmonic Nano-Resonators and Fano Resonances for Sensing Applications." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/41616.
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Different types of plasmonic nanostructures are proposed and examined experimentally and theoretically, with a view towards sensing applications. First, a self-assembly approach was developed to create arrays of well-ordered glass-supported gold nanoparticles (AuNPs) with controllable particle size and inter-particle spacing. Then, a periodic array of gold nano-disks (AuNDs) supported by a Bragg reflector was proposed and examined in a search for Fano resonances in its optical response. Arrays of heptamer-arranged nanoholes (HNH) in a thin gold film were also proposed and explored theoretically and experimentally, revealing a very rich spectrum of resonances, several exhibiting a Fano lineshape.
A commercial implementation of the vectorial finite element method (FEM) was used to model our plasmonic structures. Taking advantage of the periodic nature of the structures, a unit cell containing a single element was modelled. The transmittance, reflectance or absorbance spectra were computed, and the associated electromagnetic fields were obtained by solving the vector wave equations for the electromagnetic field vectors throughout the structures, subject to the applicable boundary conditions, and the applied source fields. The sensing performance of the structures, based on the bulk sensitivity, surface sensitivity and figure of merit (FOM) was calculated.
First, a novel bottom-up fabrication approach was applied (by our collaborators) to form a periodic array of AuNPs with controllable size over large areas on SiO2 substrates. In this method, self-assembly of block copolymer micelles loaded with metal precursors was combined with a seeding growth route to create ordered AuNPs of desired size. It was shown that this new fabrication method offers a new approach to tune the AuNP size and edge-to-edge inter-particle spacing while preserving the AuNP ordering. The optical characteristics of the AuNP arrays, such as their size, interparticle spacing, localized surface plasmon resonance (LSPR) wavelength, and bulk sensitivity, were examined, numerically and experimentally. This proposed novel fabrication method is applicable for low-cost mass-production of large-area arrays of high-quality AuNPs on a substrate for sensing applications.
Then, we proposed and examined the formation of Fano resonances in a plasmonic-dielectric system consisting of uncoupled gold nano-disk (AuND) arrays on a quarter-wave dielectric stack. The mechanism behind the creation of Fano resonances was explained based on the coherent interference between the reflection of the Bragg stack and the LSPPs of the AuNDs. Fano parameters were obtained by fitting the computational data to the Fano formula. The bulk sensitivities and figure of merit of the Fano resonances were calculated. This plasmonic structure supports Fano resonances with a linewidth around 9 nm which is much narrower than the individual AuND LSPP bandwidth ( 80 nm) and the Bragg stack bandwidth ( 100 nm). Supporting Fano resonances with such a narrow linewidth, the structure has a great potential to be used for sensing applications. Also, this metallic-dielectric nanostructure requires no near-field coupling between AuNDs to generate the Fano resonances. So, the AuNDs can be located far enough from each other to simplify the potential fabrication process.
The optical properties of HNH arrays on an SiO2 substrate were investigated, numerically and experimentally. Helium focused ion beam (HeFIB) milling was applied (by Dr. Choloong Hahn) to fabricate well-ordered and well-defined arrays of HNHs. Transmittance spectra of the structures were obtained as the optical response, which exhibits several Fano resonances. Then, the mechanism behind the formation of the Fano resonances was explained, and the sensing performance of the structure was inspected by measuring the bulk sensitivities. This array of nanohole cluster is exciting because it supports propagating SPPs and LSPPs, and also Wood’s anomaly waves, which makes the optical response very rich in excitations and spectral features. Also, as a periodic array of sub-wavelength metallic nanoholes, the system produces extraordinary optical transmission - highly enhanced transmission through (otherwise) opaque metallic films at specific wavelengths, facilitating measurement acquisition in transmission.
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Pasquale, Alyssa Joy. "Engineering photonic-plasmonic devices for spectroscopy and sensing applications." Thesis, Boston University, 2012. https://hdl.handle.net/2144/32043.
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Thesis (Ph.D.)--Boston University<br>PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>The control of light on the nano-scale has driven the development of novel optical devices such as biosensors, antennas and guiding elements. These applications benefit from the distinctive resonant properties of noble metal thin films and nanoparticles. Many optimization parameters exist in order to engineer nanoparticle properties for spectroscopy and sensing applications: for example, the choice of metal, the particle morphology, and the array geometry. By utilizing various designs from simple monomer gratings to more complex engineered arrays, we model and characterize plasmonic arrays for sensing applications.
In this thesis, I have focused on the novel paradigm of photonic-plasmonic coupling to design, fabricate, and characterize optimized nanosensors. In particular, nanoplasmonic necklaces, which consist of circular loops of closely spaced gold nanoparticles, are designed using 3D finite-difference time-domain (FDTD) simulations, fabricated with electron-beam lithography, and characterized using dark-field scattering and surface-enhanced Raman spectroscopy (SERS) of p-mercaptoaniline (pMA) monolayers. I show that such necklaces are able to support hybridized dipolar scattering resonances and polarization-controlled electromagnetic hot-spots. In addition, necklaces exhibit strong intensity enhancement when the necklace diameter leads to coupling between the broadband plasmonic resonance and the circular resonator structure of the necklace. Hence, these necklaces lead to stronger field intensity enhancement than nanoparticle monomers and dimers, which are also carefully studied. Furthermore, by embedding a dimer into one or more concentric necklace resonators, I am able to efficiently couple radiation into the dimer hot-spot by utilizing first- and second-order far-field coupling. This nanolensing leads to an order of 6-18 times improvement in Raman enhancement over isolated dimers, which is a promising platform for compact on-chip sensors.
Additionally, I have fabricated and experimentally characterized devices that were designed in my group for SERS of pMA using an optimization algorithm. The algorithm confirms that the best arrangement of nanoparticles to increase near-field intensity enhancement in a single hot-spot is to embed a dimer into particles that couple light into the hot-spot via far-field photonic radiation. These genetically optimized nanoantennas show improvement in Raman enhancement 10 times that of nanoparticle dimers, and 100 times the enhancement of optimized two-dimensional monomer diffraction gratings.<br>2031-01-02
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Robinson, Jendai E. "Fabrication and Characterization of Plasmonic and Electrochemical Devices Towards Sensing Applications." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490351933726863.
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Buchholt, Kristina. "Nanostructured materials for gas sensing applications." Doctoral thesis, Linköpings universitet, Tillämpad Fysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69641.
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In this Thesis I have investigated the use of nanostructured films as sensing and contact layers for field effect gas sensors in order to achieve high sensitivity, selectivity, and long term stability of the devices in corrosive environments at elevated temperatures. Electrochemically synthesized Pd and Au nanoparticles deposited as sensing layers on capacitive field effect devices were found to give a significant response to NOx with small, or no responses to H2, NH3, and C3H6. Pt nanoparticles incorporated in a TiC matrix are catalytically active, but the agglomeration and migration of the Pt particles towards the substrate surface reduces the activity of the sensing layer. Magnetron sputtered epitaxial films from the Ti-Si-C and the Ti-Ge-C systems were grown on 4H-SiC substrates in order to explore their potential as high temperature stable ohmic contact materials to SiC based field effect gas sensors. Ti3SiC2 thin films deposited on 4H-SiC substrates were found to yield ohmic contacts to n-type SiC after a high temperature rapid thermal anneal at 950 ºC. Investigations on the growth mode of Ti3SiC2 thin films with varying Si content on 4H-SiC substrates showed the growth to be lateral step-flow with the propagation of steps with a height as small as half a unit cell. The amount of Si present during deposition leads to differences in surface faceting of the films and Si-supersaturation conditions gives growth of Ti3SiC2 films with the presence of TiSi2 crystallites. Current-voltage measurements of the as-deposited Ti3GeC2 films indicate that this material is also a promising candidate for achieving long term stable contact layers to 4H-SiC for operation at elevated temperatures in corrosive environments. Further investigations into the Ti-Ge-C system showed that the previously unreported solid solutions of (Ti,V)2GeC, (Ti,V)3GeC2 and (Ti,V)4GeC3 can be synthesized, and it was found that the growth of these films is affected by the nature of the substrate.
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Sil, Devika. "SYNTHESIS AND APPLICATIONS OF PLASMONIC NANOSTRUCTURES." Diss., Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/364016.
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Chemistry<br>Ph.D.<br>The localized surface plasmon resonance (LSPR), arising due to the collective oscillation of free electrons in metal nanoparticles, is a sensitive probe of the nanostructure and its surrounding dielectric medium. Synthetic strategies for developing surfactant free nanoparticles using ultrafast lasers providing direct access to the metallic surface that harvest the localized surface plasmons will be discussed first followed by the applications. It is well known that the hot carriers generated as a result of plasmonic excitation can participate and catalyze chemical reactions. One such reaction is the dissociation of hydrogen. By the virtue of plasmonic excitation, an inert metal like Au can become reactive enough to support the dissociation of hydrogen at room temperature, thereby making it possible to optically detect this explosive gas. The mechanism of sensing is still not well understood. However, a hypothesis is that the dissociation of hydrogen may lead to the formation of a metastable gold hydride with optical properties distinct from the initial Au nanostructures, causing a reversible increase in transmission and blue shift in LSPR. It will also be shown that by tracking the LSPR of bare Au nanoparticles grown on a substrate, the adsorption of halide ions on Au can be detected exclusively. The shift in LSPR frequency is attributed to changes in electron density rather than the morphology of the nanostructures, which is often the case.<br>Temple University--Theses
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Angiola, Marco. "Gas sensing properties of carbon nanostructures." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424809.
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This work is aimed to evaluate the optical gas sensing properties of carbon nanomaterial. In particular it is focused on two materials, Carbon Nanotubes (CNTs) and Graphene Oxide
(GO).
The comprehension of the mechanisms of interaction of these materials with the gas molecules is fundamental for a future application of these materials as sensors targeted to a
specific specie or capable to distinctly detect several dangerous species. On this purpose nanostructures based on GO and CNTs have been produced and tested as optical gas sensors toward oxidizing/reducing gases (H2, CO, NO2) and aromatic volatile Organic Compounds (benzene, toluene, xylene).
Gold nanoparticles (Au NPs) have been used as optical probe thanks to the peculiar Localized Surface Plasmon Resonance feature in the visible range, which is extremely
sensitive to the variation in optoelectronic properties of the surrounding media, such as refractive index and the variation in charge carrier involved in plasmonic excitation in the Au NPs.
Not only amplify the Au NPs the variation in optoelectronic properties of the layer of carbon nanomaterial, but also the electromagnetic coupling with carbon nanomaterials may induce
an enhancement in response and a lowering of the limit of detection of the sensors to the target species.
Moreover, the GO and CNTs are provided of a large possibility of functionalization, which can be used to tailor the gas sensing properties of the nanostructures toward specific species.
CNTs have been combined with the Au NPs, Pd NPs, Ni NPs and fullerenes. Pd and Au NPs increase the response toward H2
, meanwhile Ni NPs and fullerenes appear specific to CO. It
is also suggested the opportunity to monitor the features of the absorbance plot of fullerenes and CNT in the NIR as optical probes, with the carbon nanomaterials playing both the role
of sensing element and optical probe.
The presence of the different functional groups in GO was investigated. The increase in sp2conjugation has a profitable effect for the sensing of H2. Instead, the removal of the oxidized
functional groups hinder the response of the films toward CO and NO2.
The reduction and functionalization of the GO with para- Phenylene Diamine induces the detection of NH3without Au NPs as optical probe. The sensors produced are characterized by high transparency in the visible range and may be incorporated as non-invasive sensors on transparent surfaces.
Most of the sensors worked at 150°C and 300°C. Test of gas sensing have been conducted at low temperatures, at 80°C for CNTs in fullerene matrix and good results were achieved. The
possibility of sensors active at room temperature is suggested by the positive tests conducted with CMG, paving the way for future developments in active optical material sensitive to
gases at room temperature.<br>Il presente lavoro è focalizzato sullo studio di sensori ottici basati su nanomateriali di carbonio, nell’ottica di un’applicazione di questi materiali come sensori di gas. Il lavoro prende in analisi due materiali, i nanotubi di carbonio (CNTs) e il grafene ossido (GO).
La comprensione dei meccanismi di interazione di questi materiali con le molecole di gas è fondamentale per le applicazioni future di questi materiali nel rilevamento di diverse specie nocive di gas. A tal proposito, nanostrutture a base di GO e CNTs sono state sviluppate e studiate come sensori ottici verso gas ossidanti-riducenti (H2, CO, NO2) e nei contronti di
composti volatili organici aromatici (benzene, toluene, xylene).
Le nanoparticelle di oro sono state utilizzate come sonde ottiche grazie alla loro peculiare caratterista di risonanza plasmonica di superficie localizzata, la quale è estremamente sensibile alle variazioni di proprietà ottico-elettroniche del mezzo che le circonda, come l’indice di rifrazione, e alle variazione di densità di portatori di carica che sono coinvolti nell'eccitazione plasmonica nelle nanoparticelle di oro.
Quindi, le nanoparticelle di oro, non solo amplificano le variazioni optoelettroniche del film di nanomateriali di carbonio a cui sono state accoppiate, ma interagiscono con questi
inducendo un miglioramento della risposta ai gas e un abbassamento del limite di rilevamento ai gas in analisi.
Inoltre, GO e CNTs presentano una vasta gamma di possibili funzionalizzazioni, che, possono essere sfruttate per una progettazione mirata delle proprietà di gas sensing delle nanostrutture di carbonio.
I CNTs sono stati abbinati a nanoparticelle di Au, Pd, Ni e a fullereni. Pd e Au portano ad un miglioramento delle prestazioni dei sensori verso il gas H2, nanoparticelle di Ni e fullereni
sembrano avere un’azione specifica verso il gas CO.
In questo lavoro viene anche suggerita la possiblità di monitorare le proprietà di assorbanza di fullereni e CNTs nel range del vicino IR. I CNTs, in tal caso, avrebbero la duplice
funzione di sonde ottiche e di materiale sensibile.
Oltre all'effetto delle nanoparticelle di oro sulle proprietà di gas sensing del GO, è stata valutata l’influenza dei diversi gruppi funzionali. L’estensione dei domini sp2 sembra
favorire il rilevamento di H2, mentre una forte rimozione di gruppi funzionali inibisce la risposta del GO verso CO e NO
2.
Książki na temat "Gas sensing; Plasmonic applications"
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Lange, D. CMOS cantilever sensor systems: Atomic force microscopy and gas sensing applications. Springer, 2002.
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Lange, D. CMOS Cantilever Sensor Systems: Atomic Force Microscopy and Gas Sensing Applications. Springer Berlin Heidelberg, 2002.
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Hapke, Bruce. Applications of an energy transfer model to three problems in planetary regoliths: The solid-state greenhouse, thermal beaming, and emittance spectra. National Aeronautics and Space Administration, 1996.
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Optical Gas Sensing: Media, Mechanisms and Applications. MDPI, 2022. http://dx.doi.org/10.3390/books978-3-0365-3480-0.
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Abramski, Krzysztof M., and Piotr Jaworski. Optical Gas Sensing: Media, Mechanisms and Applications. Mdpi AG, 2022.
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Bradley, Stuart. Atmospheric Acoustic Remote Sensing: Principles and Applications. Taylor & Francis Group, 2007.
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Bradley, Stuart. Atmospheric Acoustic Remote Sensing: Principles and Applications. Taylor & Francis Group, 2007.
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Kumar, A. 1D Semiconducting Hybrid Nanostructures -Synthesis and Applications in Gas Sensing AndOptoelectronics. Wiley & Sons, Limited, John, 2022.
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Aswal, Dinesh K., Arvind Kumar, and Nirav Joshi. 1D Semiconducting Hybrid Nanostructures: Synthesis and Applications in Gas Sensing and Optoelectronics. Wiley & Sons, Incorporated, John, 2023.
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Aswal, Dinesh K., Arvind Kumar, and Nirav Joshi. 1D Semiconducting Hybrid Nanostructures: Synthesis and Applications in Gas Sensing and Optoelectronics. Wiley & Sons, Incorporated, John, 2023.
Znajdź pełny tekst źródłaCzęści książek na temat "Gas sensing; Plasmonic applications"
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Tittl, Andreas, Harald Giessen, and Na Liu. "Plasmonic Gas and Chemical Sensing." In Nanomaterials and Nanoarchitectures. Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-9921-8_8.
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Jenkins, Samir V., Timothy J. Muldoon, and Jingyi Chen. "Plasmonic Nanostructures for Biomedical and Sensing Applications." In Metallic Nanostructures. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11304-3_5.
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Gupta, Ankur, and Gulshan Verma. "Gas Sensing Applications and Challenges." In Nanostructured Gas Sensors. Jenny Stanford Publishing, 2022. http://dx.doi.org/10.1201/9781003331230-5.
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Prasad, Arun K. "III Nitrides for Gas Sensing Applications." In Gas Sensors. CRC Press, 2022. http://dx.doi.org/10.1201/9781003278047-11.
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Idil, Neslihan, Monireh Bakhshpour, Sevgi Aslıyüce, Adil Denizli, and Bo Mattiasson. "A Plasmonic Sensing Platform Based on Molecularly Imprinted Polymers for Medical Applications." In Plasmonic Sensors and their Applications. WILEY-VCH GmbH, 2021. http://dx.doi.org/10.1002/9783527830343.ch5.
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Gabriel Kaufmann, Claudir, Rubia Young Sun Zampiva, Marco Rossi, and Annelise Kopp Alves. "Carbon Nanotubes for Gas Sensing." In Environmental Applications of Nanomaterials. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-86822-2_4.
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Verma, Gulshan, and Ankur Gupta. "One-Dimensional Nanostructures for Gas Sensing Applications." In Gas Sensors. CRC Press, 2022. http://dx.doi.org/10.1201/9781003278047-12.
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Jyoti Biswal, Hrudaya, Pandu R. Vundavilli, and Ankur Gupta. "Electrodeposited Functional Platforms for Gas Sensing Applications." In Gas Sensors. CRC Press, 2022. http://dx.doi.org/10.1201/9781003278047-7.
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Divakaran, Anoop Mampazhasseri, and Kunal Mondal. "Metal Oxide Nanostructures for Gas Sensing Applications." In Gas Sensors. CRC Press, 2022. http://dx.doi.org/10.1201/9781003278047-16.
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Ahmed, O. "Future Building Gas Sensing Applications." In Springer Series on Chemical Sensors and Biosensors. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/5346_2011_13.
Pełny tekst źródłaStreszczenia konferencji na temat "Gas sensing; Plasmonic applications"
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Ayoub, Ahmad B., and Mohamed A. Swillam. "Nanoscale plasmonic Metal-Insulator-Metal architecture for gas sensing applications." In 2016 Photonics North (PN). IEEE, 2016. http://dx.doi.org/10.1109/pn.2016.7537891.
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Zaki, Aya O., K. Kirah, and Mohamed A. Swillam. "High Sensitivity Hybrid Plasmonic Rectangular Resonator for Gas Sensing Applications." In Frontiers in Optics. OSA, 2015. http://dx.doi.org/10.1364/fio.2015.jw2a.2.
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Biswas, Sudipta Romen, Kaveh Khaliji, and Tony Low. "Graphene Plasmonic Metasurface for Beam Forming and Gas Sensing." In 2019 IEEE Research and Applications of Photonics in Defense Conference (RAPID). IEEE, 2019. http://dx.doi.org/10.1109/rapid.2019.8864391.
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Dubois, Florian, Reyhaneh Jannesari, Jasmin Spettel, et al. "Design of a photonic crystal waveguide on a plasmonic platform for gas sensing applications." In Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/bgppm.2022.jw3a.42.
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We present a design for a photonic crystal waveguide made on a plasmonic integrated photonic platform, optimized for gas sensing. The waveguide benefits from both aspects to exhibit high sensitivity and low footprint.
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Alsayed, Ahmad E., AbdelRahman M. Ghanim, Ashraf Yahia, and Mohamed A. Swillam. "Silicon-Based Plasmonic Nanoantennas at mid-infrared for Gas Sensing Applications." In 2022 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD). IEEE, 2022. http://dx.doi.org/10.1109/nusod54938.2022.9894792.
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Chong, Xinyuan, Yujing Zhang, Ki-Joong Kim, et al. "Nano-membrane based Plasmonic Devices for Surface-Enhanced Infrared Absorption Gas Sensing." In CLEO: Applications and Technology. OSA, 2018. http://dx.doi.org/10.1364/cleo_at.2018.jth2a.193.
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Morshed, Hoda, Yasser M. Sabry, and Diaa A. M. Khalil. "Wide-angle wide-spectral range IMI plasmonic MEMS mirror in the MIR for spectroscopic gas sensing applications." In MOEMS and Miniaturized Systems XX, edited by Wibool Piyawattanametha, Yong-Hwa Park, and Hans Zappe. SPIE, 2021. http://dx.doi.org/10.1117/12.2577965.
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Shimodaira, Takahiro, Shogo Suzuki, Yoshiki Aizawa, Yasufumi Iimura, and Hiromasa Shimizu. "Surface plasmon resonance transducers with membrane structure toward gas-sensing applications." In Quantum Sensing and Nano Electronics and Photonics XVI, edited by Manijeh Razeghi, Jay S. Lewis, Giti A. Khodaparast, and Eric Tournié. SPIE, 2019. http://dx.doi.org/10.1117/12.2506852.
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Stocker, Gerald, Jasmin Spettel, Thomas Grille, Thomas Ostermann, Reyhaneh Jannesari, and Bernhard Jakoby. "Fabrication of high Aspect-Ratio Si Pillar-based Hybrid plasmonic-photonic Crystal Waveguides for ultra-sensitive Infrared Gas-sensing Applications." In 2021 32nd Annual SEMI Advanced Semiconductor Manufacturing Conference (ASMC). IEEE, 2021. http://dx.doi.org/10.1109/asmc51741.2021.9435707.
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Pester, Paul D., and Andrew R. Hopkins. "Surface Plasmon Enhanced Raman Spectroscopy As A Generic Sensing Technology." In Laser Applications to Chemical Analysis. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/laca.1990.tuc12.
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Raman Spectroscopy is one of the most versatile methods of molecular analysis. The Raman effect is seen when light interacts with an atomic or molecular species, in the solid, liquid or gas phase, to produce scattered light, the frequency of which is shifted from that of the incident light. The shift in frequency corresponds to electronic, vibrational or rotational energy transitions in the sample and, since these energies are species specific, the scattered Raman light can provide identification of the molecules irradiated.
Raporty organizacyjne na temat "Gas sensing; Plasmonic applications"
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Cabrini, Stefano. Lab-on-Chip device with sub-10 nm nanochannels and plasmonic resonators for single molecule sensing applications. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1431230.
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Simon, James E., Uri M. Peiper, Gaines Miles, A. Hetzroni, Amos Mizrach, and Denys J. Charles. Electronic Sensing of Fruit Ripeness Based on Volatile Gas Emissions. United States Department of Agriculture, 1994. http://dx.doi.org/10.32747/1994.7568762.bard.
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An electronic sensory system for the evaluation of headspace volatiles was developed to determine fruit ripeness and quality. Two prototype systems were designed, constructed, and later modified. The first is an improved version of our original prototype electronic sniffer using a single head sensing unit for use as a single or paired unit placed on an individual fruit surface for applications in the field, lab, or industry. The second electronic sniffer utilizes a matrix of gas sensors, each selected for differential sensitivity to a range of volatile compounds. This system is more sophisticated as it uses multiple gas sensors, but was found to enhance the ability of the sniffer to classify fruit ripeness and quality relative to a single gas sensor. This second sniffer was designed and constructed for the sampling of fresh-cut or whole packs of fruits such as packaged strawberries and blueberries, and can serve as a prototype for research or commercial applications. Results demonstrate that electronic sensing of fruit ripeness based on aromatic volatile gas emissions can be used successfully with fresh frits. Aroma sensing was successful for classifying ripeness in muskmelons, including different cultivars, apples, blueberries, strawberries, and in a complimentary BARD project on tomatoes. This system compared favorably to the physicochemical measurements traditionally employed to assess fruit maturity. This nondestructive sensory system can detect the presence of physically damaged fruits and shows excellent application for use in quality assessment. Electronic sensors of the tin oxide type were evaluated for specificity toward a wide range of volatiles associated with fruit ripeness. Sensors were identified that detected a broad range of alcohols, aldehydes, esters, hydrocarbons, and volatile sulfur compounds, as well as individual volatiles associated with fruit ripening across a wide concentration range. Sensors are not compound specific, thus, the matrix of sensors coupled with discrimination analysis provides a fingerprint to identify the presence of compounds and to assess alterations in fresh products due to alterations in volatile emissions. Engineering developments led to the development of a system to compensate for temperature and relative humidity relative to on-line aroma sensing with melons for ripeness determination and to reduce response time, thus permitting the electronic sniffer to be used for monitoring both fresh and processed food products. The sniffer provides a fast, reliable and nondestructive tool to assess fruit ripeness and quality. We hope that our work will foster the introduction and utilization of this emerging technology into the agricultural and horticultural