Journal articles: 'Plasmonic sensing and catalysis'

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Genç, Aziz, Javier Patarroyo, Jordi Sancho-Parramon, Neus G. Bastús, Victor Puntes, and Jordi Arbiol. "Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications." Nanophotonics 6, no. 1 (January 6, 2017): 193–213. http://dx.doi.org/10.1515/nanoph-2016-0124.

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AbstractMetallic nanostructures have received great attention due to their ability to generate surface plasmon resonances, which are collective oscillations of conduction electrons of a material excited by an electromagnetic wave. Plasmonic metal nanostructures are able to localize and manipulate the light at the nanoscale and, therefore, are attractive building blocks for various emerging applications. In particular, hollow nanostructures are promising plasmonic materials as cavities are known to have better plasmonic properties than their solid counterparts thanks to the plasmon hybridization mechanism. The hybridization of the plasmons results in the enhancement of the plasmon fields along with more homogeneous distribution as well as the reduction of localized surface plasmon resonance (LSPR) quenching due to absorption. In this review, we summarize the efforts on the synthesis of hollow metal nanostructures with an emphasis on the galvanic replacement reaction. In the second part of this review, we discuss the advancements on the characterization of plasmonic properties of hollow nanostructures, covering the single nanoparticle experiments, nanoscale characterization via electron energy-loss spectroscopy and modeling and simulation studies. Examples of the applications, i.e. sensing, surface enhanced Raman spectroscopy, photothermal ablation therapy of cancer, drug delivery or catalysis among others, where hollow nanostructures perform better than their solid counterparts, are also evaluated.

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Tittl, Andreas, Harald Giessen, and Na Liu. "Plasmonic gas and chemical sensing." Nanophotonics 3, no. 3 (June 1, 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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Dong, Jun, Zhenglong Zhang, Hairong Zheng, and Mentao Sun. "Recent Progress on Plasmon-Enhanced Fluorescence." Nanophotonics 4, no. 4 (December 30, 2015): 472–90. http://dx.doi.org/10.1515/nanoph-2015-0028.

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AbstractThe optically generated collective electron density waves on metal–dielectric boundaries known as surface plasmons have been of great scientific interest since their discovery. Being electromagnetic waves on gold or silver nanoparticle’s surface, localised surface plasmons (LSP) can strongly enhance the electromagnetic field. These strong electromagnetic fields near the metal surfaces have been used in various applications like surface enhanced spectroscopy (SES), plasmonic lithography, plasmonic trapping of particles, and plasmonic catalysis. Resonant coupling of LSPs to fluorophore can strongly enhance the emission intensity, the angular distribution, and the polarisation of the emitted radiation and even the speed of radiative decay, which is so-called plasmon enhanced fluorescence (PEF). As a result, more and more reports on surface-enhanced fluorescence have appeared, such as SPASER-s, plasmon assisted lasing, single molecule fluorescence measurements, surface plasmoncoupled emission (SPCE) in biological sensing, optical orbit designs etc. In this review, we focus on recent advanced reports on plasmon-enhanced fluorescence (PEF). First, the mechanism of PEF and early results of enhanced fluorescence observed by metal nanostructure will be introduced. Then, the enhanced substrates, including periodical and nonperiodical nanostructure, will be discussed and the most important factor of the spacer between molecule and surface and wavelength dependence on PEF is demonstrated. Finally, the recent progress of tipenhanced fluorescence and PEF from the rare-earth doped up-conversion (UC) and down-conversion (DC) nanoparticles (NPs) are also commented upon. This review provides an introduction to fundamentals of PEF, illustrates the current progress in the design of metallic nanostructures for efficient fluorescence signal amplification that utilises propagating and localised surface plasmons.

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Khairullina, Evgeniia, Kseniia Mosina, Rachelle M. Choueiri, Andre Philippe Paradis, Ariel Alcides Petruk, German Sciaini, Elena Krivoshapkina, Anna Lee, Aftab Ahmed, and Anna Klinkova. "An aligned octahedral core in a nanocage: synthesis, plasmonic, and catalytic properties." Nanoscale 11, no. 7 (2019): 3138–44. http://dx.doi.org/10.1039/c8nr09731c.

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Plasmonic metal nanostructures with complex morphologies provide an important route to tunable optical responses and local electric field enhancement at the nanoscale for a variety of applications including sensing, imaging, and catalysis.

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Do, T. Anh Thu, Truong Giang Ho, Thu Hoai Bui, Quang Ngan Pham, Hong Thai Giang, Thi Thu Do, Duc Van Nguyen, and Dai Lam Tran. "Surface-plasmon-enhanced ultraviolet emission of Au-decorated ZnO structures for gas sensing and photocatalytic devices." Beilstein Journal of Nanotechnology 9 (March 1, 2018): 771–79. http://dx.doi.org/10.3762/bjnano.9.70.

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Pure and Au-decorated sub-micrometer ZnO spheres were successfully grown on glass substrates by simple chemical bath deposition and photoreduction methods. The analysis of scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images, energy-dispersive X-ray spectroscopy (EDS), UV–vis absorption, and photoluminescence (PL) spectra results were used to verify the incorporation of plasmonic Au nanoparticles (NPs) on the ZnO film. Time-resolved photoluminescence (TRPL) spectra indicated that a surface plasmonic effect exists with a fast rate of charge transfer from Au nanoparticles to the sub-micrometer ZnO sphere, which suggested the strong possibility of the use of the material for the design of efficient catalytic devices. The NO2 sensing ability of as-deposited ZnO films was investigated with different gas concentrations at an optimized sensing temperature of 120 °C. Surface decoration of plasmonic Au nanoparticles provided an enhanced sensitivity (141 times) with improved response (τRes = 9 s) and recovery time (τRec = 39 s). The enhanced gas sensing performance and photocatalytic degradation processes are suggested to be attributed to not only the surface plasmon resonance effect, but also due to a Schottky barrier between plasmonic Au and ZnO structures.

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Chen, Linmin, Meihuang Zeng, Jingwen Jin, Qiuhong Yao, Tingxiu Ye, Longjie You, Xi Chen, Xiaomei Chen, and Zhiyong Guo. "Nanoenzyme Reactor-Based Oxidation-Induced Reaction for Quantitative SERS Analysis of Food Antiseptics." Biosensors 12, no. 11 (November 8, 2022): 988. http://dx.doi.org/10.3390/bios12110988.

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Nanoenzyme reactors based on shell-isolated colloidal plasmonic nanomaterials are well-established and widely applied in catalysis and surface-enhanced Raman scattering (SERS) sensing. In this study, a “double wing with one body” strategy was developed to establish a reduced food antiseptic sensing method using shell-isolated colloidal plasmonic nanomaterials. Gold nano particles (Au NPs) were used to synthesize the colloidal plasmonic nanomaterials, which was achieved by attaching ferrous ions (Fe2+), ferric ions (Fe3+), nitroso (NO−) group, cyanogen (CN−) group, and dopamine (DA) via coordinative interactions. The oxidation-induced reaction was utilized to generate •OH following the Fe2+-mediated Fenton reaction with the shell-isolated colloidal plasmonic nanomaterials. The •OH generated in the cascade reactor had a high oxidative capacity toward acid preservatives. Importantly, with the introduction of the signal molecule DA, the cascade reactor exhibited also induced a Raman signal change by reaction with the oxidation product (malondialdehyde) which improved the sensitivity of the analysis. In addition, the stable shell-isolated structure was effective in realizing a reproducible and quantitative SERS analysis method, which overcomes previous limitations and could extend the use of nanoenzymes to various complex sensing applications.

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Zhang, Xinxin, Hongyue Huo, Kongshuo Ma, and Zhenlu Zhao. "Reduced graphene oxide-supported smart plasmonic AgPtPd porous nanoparticles for high-performance electrochemical detection of 2,4,6-trinitrotoluene." New Journal of Chemistry 46, no. 15 (2022): 7161–67. http://dx.doi.org/10.1039/d2nj00434h.

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Smart plasmonic AgPtPd NPs/rGO exhibited a wide linear range for TNT from 0.1 to 8 ppm with a sensing limit of 0.95 ppb. The remarkable features are probably attributed to the integrated advantages of the plasmonic properties and synergistic effect.

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Larsson, Elin M., Svetlana Syrenova, and Christoph Langhammer. "Nanoplasmonic sensing for nanomaterials science." Nanophotonics 1, no. 3-4 (December 1, 2012): 249–66. http://dx.doi.org/10.1515/nanoph-2012-0029.

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AbstractNanoplasmonic sensing has over the last two decades emerged as and diversified into a very promising experimental platform technology for studies of biomolecular interactions and for biomolecule detection (biosensors). Inspired by this success, in more recent years, nanoplasmonic sensing strategies have been adapted and tailored successfully for probing functional nanomaterials and catalysts in situ and in real time. An increasing number of these studies focus on using the localized surface plasmon resonance (LSPR) as an experimental tool to study a process of interest in a nanomaterial, with a materials science focus. The key assets of nanoplasmonic sensing in this area are its remote readout, non-invasive nature, single particle experiment capability, ease of use and, maybe most importantly, unmatched flexibility in terms of compatibility with all material types (particles and thin/thick layers, conductive or insulating) are identified. In a direct nanoplasmonic sensing experiment the plasmonic nanoparticles are active and simultaneously constitute the sensor and the studied nano-entity. In an indirect nanoplasmonic sensing experiment the plasmonic nanoparticles are inert and adjacent to the material of interest to probe a process occurring in/on this material. In this review we define and discuss these two generic experimental strategies and summarize the growing applications of nanoplasmonic sensors as experimental tools to address materials science-related questions.

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Ayivi, Raphael D., Bukola O. Adesanmi, Eric S. McLamore, Jianjun Wei, and Sherine O. Obare. "Molecularly Imprinted Plasmonic Sensors as Nano-Transducers: An Effective Approach for Environmental Monitoring Applications." Chemosensors 11, no. 3 (March 22, 2023): 203. http://dx.doi.org/10.3390/chemosensors11030203.

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Molecularly imprinted plasmonic nanosensors are robust devices capable of selective target interaction, and in some cases reaction catalysis. Recent advances in control of nanoscale structure have opened the door for development of a wide range of chemosensors for environmental monitoring. The soaring rate of environmental pollution through human activities and its negative impact on the ecosystem demands an urgent interest in developing rapid and efficient techniques that can easily be deployed for in-field assessment and environmental monitoring purposes. Organophosphate pesticides (OPPs) play a significant role for agricultural use; however, they also present environmental threats to human health due to their chemical toxicity. Plasmonic sensors are thus vital analytical detection tools that have been explored for many environmental applications and OPP detection due to their excellent properties such as high sensitivity, selectivity, and rapid recognition capability. Molecularly imprinted polymers (MIPs) have also significantly been recognized as a highly efficient, low-cost, and sensitive synthetic sensing technique that has been adopted for environmental monitoring of a wide array of environmental contaminants, specifically for very small molecule detection. In this review, the general concept of MIPs and their synthesis, a summary of OPPs and environmental pollution, plasmonic sensing with MIPs, surface plasmon resonance (SPR), surface-enhanced Raman spectroscopy (SERS) MIP sensors, and nanomaterial-based sensors for environmental monitoring applications and OPP detection have been elucidated according to the recent literature. In addition, a conclusion and future perspectives section at the end summarizes the scope of molecularly imprinted plasmonic sensors for environmental applications.

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Quazi, Mohzibudin Z., Taeyoung Kim, Jinhwan Yang, and Nokyoung Park. "Tuning Plasmonic Properties of Gold Nanoparticles by Employing Nanoscale DNA Hydrogel Scaffolds." Biosensors 13, no. 1 (December 24, 2022): 20. http://dx.doi.org/10.3390/bios13010020.

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Noble metals have always fascinated researchers due to their feasible and facile approach to plasmonics. Especially the extensive utilization of gold (Au) has been found in biomedical engineering, microelectronics, and catalysis. Surface plasmonic resonance (SPR) sensors are achievable by employing plasmonic nanoparticles. The past decades have seen colossal advancement in noble metal nanoparticle research. Surface plasmonic biosensors are advanced in terms of sensing accuracy and detection limit. Likewise, gold nanoparticles (AuNPs) have been widely used to develop distinct biosensors for molecular diagnosis. DNA nanotechnology facilitates advanced nanostructure having unique properties that contribute vastly to clinical therapeutics. The critical element for absolute control of materials at the nanoscale is the engineering of optical and plasmonic characteristics of the polymeric and metallic nanostructure. Correspondingly, AuNP’s vivid intense color expressions are dependent on their size, shape, and compositions, which implies their strong influence on tuning the plasmonic properties. These plasmonic properties of AuNPs have vastly exerted the biosensing and molecular diagnosis applications without any hazardous effects. Here, we have designed nanoscale X-DNA-based Dgel scaffolds utilized for tuning the plasmonic properties of AuNPs. The DNA nanohydrogel (Dgel) scaffolds engineered with three different X-DNAs of distinct numbers of base pairs were applied. We have designed X-DNA base pair-controlled size-varied Dgel scaffolds and molar ratio-based nano assemblies to tune the plasmonic properties of AuNPs. The nanoscale DNA hydrogel’s negatively charged scaffold facilitates quaternary ammonium ligand-modified positively charged AuNPs to flocculate around due to electrostatic charge attractions. Overall, our study demonstrates that by altering the DNA hydrogel scaffolds and the physical properties of the nanoscale hydrogel matrix, the SPR properties can be modulated. This approach could potentially benefit in monitoring diverse therapeutic biomolecules.

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Matsuura, Ryo, Keiko Tawa, Yukiya Kitayama, and Toshifumi Takeuchi. "A plasmonic chip-based bio/chemical hybrid sensing system for the highly sensitive detection of C-reactive protein." Chemical Communications 52, no. 20 (2016): 3883–86. http://dx.doi.org/10.1039/c5cc07868g.

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A synthetic polymer ligand-grafted plasmonic chip was fabricated and demonstrated a highly sensitive detection of C-reactive protein (CRP) by grating-coupled surface plasmon field-enhanced fluorescence.

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Vasiljevic, Natasa, Vinicius Cruz San Martin, and Andrei Sarua. "Electrodeposition of Plasmonic Nanostructures." ECS Meeting Abstracts MA2022-02, no. 23 (October 9, 2022): 985. http://dx.doi.org/10.1149/ma2022-0223985mtgabs.

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Electrochemical control and the use of electrodeposition in the design of dynamic plasmonics have attracted much attention in recent years.1 Development of dynamic plasmonic metamaterials is attractive for many applications such as molecular sensing and analysis, environmental monitoring, photo-catalysis, colour changing displays and electrochromic devices such as 'smart' windows. Electrodeposition is one of the most attractive ways to create and reversibly transform nanostructures' shape, size and chemical composition.2,3 Plasmonics is related to the localised surface excitations of electrons in metal nanostructures due to strong interactions with light. The resulted electric field enhancement due to the surface plasmons can be used to manipulate light–matter. Nanostructured Ag and Au are classic plasmonic materials. While silver is a metal that exhibits many advantages over gold, such as higher extinction coefficients in the blue and UV region of the EM spectrum, sharper extinction bands and extremely high field enhancements, its employment is hindered by low chemical stability. The most recent theoretical analysis suggests that Au-Ag derived nanostructures with controlled geometry, composition, and distribution can create new interesting optical phenomena.4 By developing Au-Ag based nanostructures, we can then benefit from combining optical properties of Au and Ag and, at the same time, improve the chemical stability of silver. We investigated the electrodeposition of Au and Ag-based arrays of ordered and random nano-particles on indium tin oxide substrates from different solutions and studied their optical properties. We demonstrated that varying the electrodeposition parameters led to changes in both the resonance wavelength and the strength of resonance linked to the structural characteristics (size and shape) and the chemical composition of the deposited particles. Exploration of the dynamic reversible changes via electrodeposition will be presented. References: Y. Jin, L. Zhou, J. Liang, and J. Zhu, Adv. Photon., 3(4), 044002 (2021). G. Wang, X. Chen, S. Liu, C. Wong, S. Chu, ACS Nano, 10 (2), 1788–1794, (2016) C. J. Barile, D. J. Slotcavage, J. Hou, M. T. Strand, T. S. Hernandez, M. D. McGehee, Joule 1 (1), 133-145 (2017) G. Guisbiers, R. Mendoza-Cruz, L. Bazan-Diaz, J. J. Velazquez-Salazar, R. Mendoza-Perez, J. A. Robledo-Torres, J. L. Rodriguez-Lopez, J. M. Montejano-Carrizales, R. L. Whetten, Jose-Yacaman, M. ACS Nano, 10(1), 188-198, (2016)

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Lo, Tzu-Hsuan, Pen-Yuan Shih, and Chiu-Hsien Wu. "The Response of UV/Blue Light and Ozone Sensing Using Ag-TiO2 Planar Nanocomposite Thin Film." Sensors 19, no. 23 (November 20, 2019): 5061. http://dx.doi.org/10.3390/s19235061.

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We successfully fabricated a planar nanocomposite film that uses a composite of silver nanoparticles and titanium dioxide film (Ag-TiO2) for ultraviolet (UV) and blue light detection and application in ozone gas sensor. Ultraviolet-visible spectra revealed that silver nanoparticles have a strong surface plasmon resonance (SPR) effect. A strong redshift of the plasmonic peak when the silver nanoparticles covered the TiO2 thin film was observed. The value of conductivity change for the Ag-TiO2 composite is 4–8 times greater than that of TiO2 film under UV and blue light irradiation. The Ag-TiO2 nanocomposite film successfully sensed 100 ppb ozone. The gas response of the composite film increased by roughly six and four times under UV and blue light irradiation, respectively. We demonstrated that a Ag-TiO2 composite gas sensor can be used with visible light (blue). The planar composite significantly enhances photo catalysis. The composite films have practical application potential for wearable devices.

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Yan, Guojuan, Huanhuan Ni, Xiaoxiao Li, Xiaolan Qi, Xi Yang, and Hongyan Zou. "Plasmonic Cu2−xSe Mediated Colorimetric/Photothermal Dual-Readout Detection of Glutathione." Nanomaterials 13, no. 11 (June 1, 2023): 1787. http://dx.doi.org/10.3390/nano13111787.

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Plasmonic nanomaterials have attracted great attention in the field of catalysis and sensing for their outstanding electrical and optical properties. Here, a representative type of nonstoichiometric Cu2−xSe nanoparticles with typical near-infrared (NIR) localized surface plasma resonance (LSPR) properties originating from their copper deficiency was applied to catalyze the oxidation of colorless TMB into their blue product in the presence of H2O2, indicating they had good peroxidase-like activity. However, glutathione (GSH) inhibited the catalytic oxidation of TMB, as it can consume the reactive oxygen species. Meanwhile, it can induce the reduction of Cu(II) in Cu2−xSe, resulting in a decrease in the degree of copper deficiency, which can lead to a reduction in the LSPR. Therefore, the catalytic ability and photothermal responses of Cu2−xSe were decreased. Thus, in our work, a colorimetric/photothermal dual-readout array was developed for the detection of GSH. The linear calibration for GSH concentration was in the range of 1–50 μM with the LOD as 0.13 μM and 50–800 μM with the LOD as 39.27 μM. To evaluate the practicability of the assay, tomatoes and cucumbers were selected as real samples, and good recoveries indicated that the developed assay had great potential in real applications.

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Jeong, Hyeon-Ho, Andrew G. Mark, and Peer Fischer. "Magnesium plasmonics for UV applications and chiral sensing." Chemical Communications 52, no. 82 (2016): 12179–82. http://dx.doi.org/10.1039/c6cc06800f.

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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_xO 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.

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Wei, Zheng-Nan, Zhi-Hong Mo, Xiao-Li Pu, and Yi-Chong Xu. "Plasmonic swings during the Fenton reaction: catalytic sensing of organics in water via fullerene-decorated gold nanoparticles." Chemical Communications 51, no. 61 (2015): 12231–34. http://dx.doi.org/10.1039/c5cc03284a.

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Juneja, Subhavna, Jaspal Singh, Roshni Thapa, R. K. Soni, and Jaydeep Bhattacharya. "Improved SERS sensing on biosynthetically grown self-cleaning plasmonic ZnO nano-leaves." New Journal of Chemistry 45, no. 44 (2021): 20895–903. http://dx.doi.org/10.1039/d1nj02883a.

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Chen, Jennifer I. L., Yeechi Chen, and David S. Ginger. "Plasmonic Nanoparticle Dimers for Optical Sensing of DNA in Complex Media." Journal of the American Chemical Society 132, no. 28 (July 21, 2010): 9600–9601. http://dx.doi.org/10.1021/ja103240g.

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Polo, Ester, Pablo del Pino, Beatriz Pelaz, Valeria Grazu, and Jesus M. de la Fuente. "Plasmonic-driven thermal sensing: ultralow detection of cancer markers." Chemical Communications 49, no. 35 (2013): 3676. http://dx.doi.org/10.1039/c3cc39112d.

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Jurkšaitis, Povilas, Ernesta Bužavaitė-Vertelienė, and Zigmas Balevičius. "Strong Coupling between Surface Plasmon Resonance and Exciton of Labeled Protein–Dye Complex for Immunosensing Applications." International Journal of Molecular Sciences 24, no. 3 (January 19, 2023): 2029. http://dx.doi.org/10.3390/ijms24032029.

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In this study, we present an analysis of the optical response of strong coupling between SPR and labeled proteins. We demonstrate a sensing methodology that allows to evaluate the protein mass adsorbed to the gold’s surface from the Rabi gap, which is a direct consequence of the strong light–matter interaction between surface plasmon polariton and dye exciton of labeled protein. The total internal reflection ellipsometry optical configuration was used for simulation of the optical response for adsorption of HSA-Alexa633 dye-labeled protein to a thin gold layer onto the glass prism. It was shown that Rabi oscillations had parabolic dependence on the number of labeled proteins attached to the sensor surface; however, for photonic–plasmonic systems in real experimental conditions, the range of the Rabi energy is rather narrow, thus it can be linearly approximated. This approach based on the strong coupling effect paves the alternative way for detection and monitoring of the interaction of the proteins on the transducer surface through the change of coupling strengths between plasmonic resonance and the protein–dye complex.

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Li, Hui, Xin Xia, Chengxiang Guo, Lei Ge, and Feng Li. "Laser-induced nano-bismuth decorated CdS–graphene hybrid for plasmon-enhanced photoelectrochemical analysis." Chemical Communications 56, no. 89 (2020): 13784–87. http://dx.doi.org/10.1039/d0cc05907b.

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Direct-laser-writing of a plasmonic Bi⁰-based hybrid photoelectrode with a significantly amplified and stable photocurrent response is successfully demonstrated to provide a highly sensitive PEC sensing platform.

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Duan, Huiyu, Tong Wang, Ziyun Su, Huan Pang, and Changyun Chen. "Recent progress and challenges in plasmonic nanomaterials." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 846–73. http://dx.doi.org/10.1515/ntrev-2022-0039.

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Abstract Owing to their optical, mechanical, and catalytic properties, plasmonic nanomaterials (P-NMs) have been widely used in sensing, disease treatment, as well as energy transfer and conversion applications. Therefore, the synthesis, properties, and applications of P-NMs have garnered significant interest in recent decades. This review surveys the various types of P-NMs, their synthesis methods, their properties, and recent applications. In addition, we summarize the current challenges and future developments in P-NMs. We hope this article will help researchers to gain a deeper understanding of P-NM applications in the field of energy, overcome the current problems associated with P-NMs, and develop novel P-NMs with better characteristics.

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Tim, Beata, Paulina Błaszkiewicz, and Michał Kotkowiak. "Recent Advances in Metallic Nanoparticle Assemblies for Surface-Enhanced Spectroscopy." International Journal of Molecular Sciences 23, no. 1 (December 28, 2021): 291. http://dx.doi.org/10.3390/ijms23010291.

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Robust and versatile strategies for the development of functional nanostructured materials often focus on assemblies of metallic nanoparticles. Research interest in such assemblies arises due to their potential applications in the fields of photonics and sensing. Metallic nanoparticles have received considerable recent attention due to their connection to the widely studied phenomenon of localized surface plasmon resonance. For instance, plasmonic hot spots can be observed within their assemblies. A useful form of spectroscopy is based on surface-enhanced Raman scattering (SERS). This phenomenon is a commonly used in sensing techniques, and it works using the principle that scattered inelastic light can be greatly enhanced at a surface. However, further research is required to enable improvements to the SERS techniques. For example, one question that remains open is how to design uniform, highly reproducible, and efficiently enhancing substrates of metallic nanoparticles with high structural precision. In this review, a general overview on nanoparticle functionalization and the impact on nanoparticle assembly is provided, alongside an examination of their applications in surface-enhanced Raman spectroscopy.

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Tabassum, Sadia, Saira Naz, Amjad Nisar, Hongyu Sun, Shafqat Karim, Maaz Khan, Shiasta Shahzada, Ata ur Rahman, and Mashkoor Ahmad. "Synergic effect of plasmonic gold nanoparticles and graphene oxide on the performance of glucose sensing." New Journal of Chemistry 43, no. 47 (2019): 18925–34. http://dx.doi.org/10.1039/c9nj04532e.

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A highly sensitive Au–GO hybrid nanostructure based non-enzymatic glucose biosensor is fabricated and exhibits superior sensitivity of 84.53 μA mM⁻¹ cm⁻². The biosensor also has applications for the detection of glucose in human blood serum, food samples and drinks.

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Sapunova, Anastasiia A., Yulia I. Yandybaeva, Roman A. Zakoldaev, Alexandra V. Afanasjeva, Olga V. Andreeva, Igor A. Gladskikh, Tigran A. Vartanyan, and Daler R. Dadadzhanov. "Laser-Induced Chirality of Plasmonic Nanoparticles Embedded in Porous Matrix." Nanomaterials 13, no. 10 (May 13, 2023): 1634. http://dx.doi.org/10.3390/nano13101634.

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Chiral plasmonic nanostructures have emerged as promising objects for numerous applications in nanophotonics, optoelectronics, biosensing, chemistry, and pharmacy. Here, we propose a novel method to induce strong chirality in achiral ensembles of gold nanoparticles via irradiation with circularly-polarized light of a picosecond Nd:YAG laser. Embedding of gold nanoparticles into a nanoporous silicate matrix leads to the formation of a racemic mixture of metal nanoparticles of different chirality that is enhanced by highly asymmetric dielectric environment of the nanoporous matrix. Then, illumination with intense circularly-polarized light selectively modifies the particles with the chirality defined by the handedness of the laser light, while their “enantiomers” survive the laser action almost unaffected. This novel modification of the spectral hole burning technique leads to the formation of an ensemble of plasmonic metal nanoparticles that demonstrates circular dichroism up to 100 mdeg. An unforeseen peculiarity of the chiral nanostructures obtained in this way is that 2D and 3D nanostructures contribute almost equally to the observed circular dichroism signals. Thus, the circular dichroism is neither even nor odd under reversal of direction of light propagation. These findings will help guide the development of a passive optical modulator and nanoplatform for enhanced chiral sensing and catalysis.

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Mamonova, Daria V., Anna A. Vasileva, Yuri V. Petrov, Alexandra V. Koroleva, Denis V. Danilov, Ilya E. Kolesnikov, Gulia I. Bikbaeva, Julien Bachmann, and Alina A. Manshina. "Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles." Nanomaterials 12, no. 1 (December 31, 2021): 146. http://dx.doi.org/10.3390/nano12010146.

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Multimetallic plasmonic systems usually have distinct advantages over monometallic nanoparticles due to the peculiarity of the electronic structure appearing in advanced functionality systems, which is of great importance in a variety of applications including catalysis and sensing. Despite several reported techniques, the controllable synthesis of multimetallic plasmonic nanoparticles in soft conditions is still a challenge. Here, mono-, bi- and tri-metallic nanoparticles were successfully obtained as a result of a single step laser-induced deposition approach from monometallic commercially available precursors. The process of nanoparticles formation is starting with photodecomposition of the metal precursor resulting in nucleation and the following growth of the metal phase. The deposited nanoparticles were studied comprehensively with various experimental techniques such as SEM, TEM, EDX, XPS, and UV-VIS absorption spectroscopy. The size of monometallic nanoparticles is strongly dependent on the type of metal: 140–200 nm for Au, 40–60 nm for Ag, 2–3 nm for Pt. Bi- and trimetallic nanoparticles were core-shell structures representing monometallic crystallites surrounded by an alloy of respective metals. The formation of an alloy phase took place between monometallic nanocrystallites of different metals in course of their growth and agglomeration stage.

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Scroccarello, Annalisa, Flavio Della Pelle, and Dario Compagnone. "Lab-on-a-Tip Based on a Bimetallic Nanoarchitecture Enabling Catalytic 4-Nitrophenol Switch-off." Proceedings 60, no. 1 (November 2, 2020): 4. http://dx.doi.org/10.3390/iecb2020-07083.

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Mono-and multi-metal nanoparticles (MNPs), thanks to their unique and tunable features, still fascinate the analytical sciences, from their widespread use in sensing and biosensing as nanoplasmonic tags or catalysts up to MNPs-decorated surfaces. Here, a lab µ-Tip decorated with plasmonic-active polymeric films embodying gold/silver nanostructures is presented. The proposed lab-on-a-tip device speed-up the 4-nitrophenol conversion in 4-aminophenol, retaining the performances for more than 10 consecutive measures, acting as an enzyme-like catalyst.

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Liu, Yu, Fangfang Wang, Yawen Liu, Lu Cao, Haiming Hu, Xiaowei Yao, Junping Zheng, and Hongtao Liu. "A label-free plasmonic nanosensor driven by horseradish peroxidase-assisted tetramethylbenzidine redox catalysis for colorimetric sensing H2O2 and cholesterol." Sensors and Actuators B: Chemical 389 (August 2023): 133893. http://dx.doi.org/10.1016/j.snb.2023.133893.

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Zhang, Bin, Xiaoming Wang, Wei Hu, Yiquan Liao, Yichang He, Bohua Dong, Minggang Zhao, and Ye Ma. "SPR-Enhanced Au@Fe3O4 Nanozyme for the Detection of Hydroquinone." Chemosensors 11, no. 7 (July 14, 2023): 392. http://dx.doi.org/10.3390/chemosensors11070392.

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Artificial nanozymes that are based on ferric oxides have drawn enormous attention due to their high stability, high efficiency, and low cost as compared with natural enzymes. Due to the unique optical plasmonic properties, gold nanoparticles (Au NPs) have been widely utilized in the fields of colorimetric, Raman, and fluorescence sensing. In this work, a photo-responsive Au@Fe3O4 nanozyme is prepared with outstanding peroxidase-like activity. The hot electrons of Au NPs that are excited by a surface plasmon resonance (SPR) effect of NPs improve the catalytic activity of Au@Fe3O4 in oxidizing 3,3′,5,5′-tetramethylbenzidine (TMB) and the detection of hydroquinone (HQ). The magnetic separation and reusability of the nanozyme further lower its costs. The detection linear range of the sensor is 0–30 μM and the lowest detection limit is 0.29 μM. Especially in the detection of real water samples, a good recovery rate is obtained, which provides promising references for the development of the HQ detection technology in seawater.

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Doan, Mai Quan, Nguyen Ha Anh, Hoang Van Tuan, Nguyen Cong Tu, Nguyen Huu Lam, Nguyen Tien Khi, Vu Ngoc Phan, Pham Duc Thang, and Anh-Tuan Le. "Improving SERS Sensing Efficiency and Catalytic Reduction Activity in Multifunctional Ternary Ag-TiO2-GO Nanostructures: Roles of Electron Transfer Process on Performance Enhancement." Adsorption Science & Technology 2021 (October 1, 2021): 1–13. http://dx.doi.org/10.1155/2021/1169599.

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Multifunctional nanocomposites have received great attention for years; electron transfer (ET) is considered as an explanatory mechanism for enhancement of performance of these nanostructures. The existence of this ET process has been proved in many studies using either experimental or computational approaches. In this study, a ternary nanocomposite system of Ag/TiO2/GO was prepared to evaluate the performance enhancement in two experimental models: a physical model (i.e., surface-enhanced Raman scattering (SERS) sensor) and a chemical one (i.e., catalytic reduction reaction). The metal/semiconductor heterojunction between Ag and TiO2, as well as Ti-O-C bonds, has allowed plasmonic hot electrons to be transferred in the internal structure of the material. An investigation on the role of Ag content on the SERS sensing and catalytic reduction efficiency of Ag/TiO2/GO was performed in both models. Interestingly, they all resulted in the same optimal Ag content of 50 wt%. It was then further discussed to provide a convincing evidence for the plasmon-induced electron transfer phenomena in the Ag/TiO2/GO nanostructure. These findings also suggest a pathway to design and develop high-performance, cost-effective, facile-preparation, and eco-friendly multifunctional nanostructures for detecting and removing contaminants in environment.

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Wang, Chenxu, Yan Du, Qiong Wu, Shuguang Xuan, Jiajing Zhou, Jibin Song, Fangwei Shao, and Hongwei Duan. "Stimuli-responsive plasmonic core–satellite assemblies: i-motif DNA linker enabled intracellular pH sensing." Chemical Communications 49, no. 51 (2013): 5739. http://dx.doi.org/10.1039/c3cc80005a.

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Liao, Qingwei, Wei Si, Jingxin Zhang, Hanchen Sun, and Lei Qin. "In Situ Silver Nanonets for Flexible Stretchable Electrodes." International Journal of Molecular Sciences 24, no. 11 (May 26, 2023): 9319. http://dx.doi.org/10.3390/ijms24119319.

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Shape-controlled synthesis is an effective method for controlling the physicochemical properties of nanomaterials, especially single-crystal nanomaterials, but it is difficult to control the morphology of single-crystal metallic nanomaterials. Silver nanowires (AgNWs) are regarded as key materials for the new generation of human–computer interaction, which can be applied in large-scale flexible and foldable devices, large-size touch screens, transparent LED films, photovoltaic cells, etc. When used on a large scale, the junction resistance will be generated at the overlap between AgNWs and the conductivity will decrease. When stretched, the overlap of AgNWs will be easily disconnected, which will lead to a decrease in electrical conductivity or even system failure. We propose that in situ silver nanonets (AgNNs) can solve the above two problems. The AgNNs exhibited excellent electrical conductivity (0.15 Ω∙sq−1, which was 0.2 Ω∙sq−1 lower than the 0.35 Ω∙sq−1 square resistance of AgNWs) and extensibility (the theoretical tensile rate was 53%). In addition to applications in flexible stretchable sensing and display industries, they also have the potential to be used as plasmonic materials in molecular recognition, catalysis, biomedicine and other fields.

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Karmaoui, Mohamed, Luc Lajaunie, David Maria Tobaldi, Gianluca Leonardi, Chahinez Benbayer, Raul Arenal, João A. Labrincha, and Giovanni Neri. "Modification of anatase using noble-metals (Au, Pt, Ag): Toward a nanoheterojunction exhibiting simultaneously photocatalytic activity and plasmonic gas sensing." Applied Catalysis B: Environmental 218 (December 2017): 370–84. http://dx.doi.org/10.1016/j.apcatb.2017.06.010.

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Murphy, Catherine J., Tapan K. Sau, Anand Gole, and Christopher J. Orendorff. "Surfactant-Directed Synthesis and Optical Properties of One-Dimensional Plasmonic Metallic Nanostructures." MRS Bulletin 30, no. 5 (May 2005): 349–55. http://dx.doi.org/10.1557/mrs2005.97.

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AbstractOne-dimensional metallic nanostructures such as nanorods and nanowires are of tremendous interest for electronic, sensing, and catalytic applications. Shape anisotropy introduces new optical properties in gold and silver nanoparticles, such as longitudinal plasmon resonance bands in the visible and near-IR portion of the spectrum. Different approaches employed for the shape-controlled synthesis of silver and gold nanocrystals include chemical, electrochemical, and physical methods. The chemical route for the synthesis of nanorods and nanowires, in which metal salts are reduced in an aqueous solution, is one of the most widely used methods. This route commonly employs a surfactant as the directing agent to introduce asymmetry in the nanocrystal shape. Variation in the concentration of precursor salt and the surfactant, the nature of the surfactant, the nature and concentration of reducing agents, the presence of external salts, and the pH of the reaction solution all affect nanocrystal shape, dimension, and yield. The size and shape of the nanocrystals affect the position of the plasmon bands, which in turn has been widely used in surface-enhanced spectroscopies that include both Raman and fluorescence. The aqueous, surfactant-directed route also promises the synthesis of more complex nanostructures with additional desirable properties.

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Zhang, Chao, Zhaoxiang Li, Si Qiu, Weixi Lu, Mingrui Shao, Chang Ji, Guangcan Wang, Xiaofei Zhao, Jing Yu, and Zhen Li. "Highly ordered arrays of hat-shaped hierarchical nanostructures with different curvatures for sensitive SERS and plasmon-driven catalysis." Nanophotonics 11, no. 1 (November 15, 2021): 33–44. http://dx.doi.org/10.1515/nanoph-2021-0476.

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Abstract Regulation of hot spots exhibits excellent potential in many applications including nanolasers, energy harvesting, sensing, and subwavelength imaging. Here, hat-shaped hierarchical nanostructures with different space curvatures have been proposed to enhance hot spots for facilitating surface-enhanced Raman scattering (SERS) and plasmon-driven catalysis applications. These novel nanostructures comprise two layers of metal nanoparticles separated by hat-shaped MoS2 films. The fabrication of this hybrid structure is based on the thermal annealing and thermal evaporation of self-assembled polystyrene spheres, which are convenient to control the metal particle size and the curvature of hat-shaped nanostructures. Based on the narrow gaps produced by the MoS2 films and the curvature of space, the constructed platform exhibits superior SERS capability and achieves ultrasensitive detection for toxic molecules. Furthermore, the surface catalytic conversion of p-nitrothiophenol (PNTP) to p, p′-dimercaptobenzene (DMAB) was in situ monitored by the SERS substrate. The mechanism governing this regulation of hot spots is also investigated via theoretical simulations.

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Gurbatov, Stanislav, Vladislav Puzikov, Evgeny Modin, Alexander Shevlyagin, Andrey Gerasimenko, Eugeny Mitsai, Sergei A. Kulinich, and Aleksandr Kuchmizhak. "Ag-Decorated Si Microspheres Produced by Laser Ablation in Liquid: All-in-One Temperature-Feedback SERS-Based Platform for Nanosensing." Materials 15, no. 22 (November 15, 2022): 8091. http://dx.doi.org/10.3390/ma15228091.

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Combination of dissimilar materials such as noble metals and common semiconductors within unified nanomaterials holds promise for optoelectronics, catalysis and optical sensing. Meanwhile, difficulty of obtaining such hybrid nanomaterials using common lithography-based techniques stimulates an active search for advanced, inexpensive, and straightforward fabrication methods. Here, we report one-pot one-step synthesis of Ag-decorated Si microspheres via nanosecond laser ablation of monocrystalline silicon in isopropanol containing AgNO3. Laser ablation of bulk silicon creates the suspension of the Si microspheres that host further preferential growth of Ag nanoclusters on their surface upon thermal-induced decomposition of AgNO3 species by subsequently incident laser pulses. The amount of the AgNO3 in the working solution controls the density, morphology, and arrangement of the Ag nanoclusters allowing them to achieve strong and uniform decoration of the Si microsphere surface. Such unique morphology makes Ag-decorated Si microspheres promising for molecular identification based on the surface-enhanced Raman scattering (SERS) effect. In particular, the designed single-particles sensing platform was shown to offer temperature-feedback modality as well as SERS signal enhancement up to 106, allowing reliable detection of the adsorbed molecules and tracing their plasmon-driven catalytic transformations. Considering the ability to control the decoration degree of Si microspheres by Ag nanoclusters via amount of the AgNO3, the developed one-pot easy-to-implement PLAL synthesis holds promise for gram-scale production of high-quality hybrid nanomaterial for various nanophotonics and sensing applications.

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Ruffino, Francesco. "Light-Scattering Simulations from Spherical Bimetallic Core–Shell Nanoparticles." Micromachines 12, no. 4 (March 26, 2021): 359. http://dx.doi.org/10.3390/mi12040359.

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Bimetallic nanoparticles show novel electronic, optical, catalytic or photocatalytic properties different from those of monometallic nanoparticles and arising from the combination of the properties related to the presence of two individual metals but also from the synergy between the two metals. In this regard, bimetallic nanoparticles find applications in several technological areas ranging from energy production and storage to sensing. Often, these applications are based on optical properties of the bimetallic nanoparticles, for example, in plasmonic solar cells or in surface-enhanced Raman spectroscopy-based sensors. Hence, in these applications, the specific interaction between the bimetallic nanoparticles and the electromagnetic radiation plays the dominant role: properties as localized surface plasmon resonances and light-scattering efficiency are determined by the structure and shape of the bimetallic nanoparticles. In particular, for example, concerning core-shell bimetallic nanoparticles, the optical properties are strongly affected by the core/shell sizes ratio. On the basis of these considerations, in the present work, the Mie theory is used to analyze the light-scattering properties of bimetallic core–shell spherical nanoparticles (Au/Ag, AuPd, AuPt, CuAg, PdPt). By changing the core and shell sizes, calculations of the intensity of scattered light from these nanoparticles are reported in polar diagrams, and a comparison between the resulting scattering efficiencies is carried out so as to set a general framework useful to design light-scattering-based devices for desired applications.

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Tramontano, Chiara, Bruno Miranda, Giovanna Chianese, Luca De Stefano, Carlo Forestiere, Marinella Pirozzi, and Ilaria Rea. "Design of Gelatin-Capped Plasmonic-Diatomite Nanoparticles with Enhanced Galunisertib Loading Capacity for Drug Delivery Applications." International Journal of Molecular Sciences 22, no. 19 (October 5, 2021): 10755. http://dx.doi.org/10.3390/ijms221910755.

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Inorganic diatomite nanoparticles (DNPs) have gained increasing interest as drug delivery systems due to their porous structure, long half-life, thermal and chemical stability. Gold nanoparticles (AuNPs) provide DNPs with intriguing optical features that can be engineered and optimized for sensing and drug delivery applications. In this work, we combine DNPs with gelatin stabilized AuNPs for the development of an optical platform for Galunisertib delivery. To improve the DNP loading capacity, the hybrid platform is capped with gelatin shells of increasing thicknesses. Here, for the first time, full optical modeling of the hybrid system is proposed to monitor both the gelatin generation, degradation, and consequent Galunisertib release by simple spectroscopic measurements. Indeed, the shell thickness is optically estimated as a function of the polymer concentration by exploiting the localized surface plasmon resonance shifts of AuNPs. We simultaneously prove the enhancement of the drug loading capacity of DNPs and that the theoretical modeling represents an efficient predictive tool to design polymer-coated nanocarriers.

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Ding, Yi, and Mingwei Chen. "Nanoporous Metals for Catalytic and Optical Applications." MRS Bulletin 34, no. 8 (August 2009): 569–76. http://dx.doi.org/10.1557/mrs2009.156.

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AbstractNanoporous metals (NPMs) made by dealloying represent a class of functional materials with the unique structural properties of mechanical rigidity, electrical conductivity, and high corrosion resistance. They also possess a porous network structure with feature dimensions tunable within a wide range from a few nanometers to several microns. Coupled with a rich surface chemistry for further functionalization, NPMs have great potential for applications in heterogeneous catalysis, electrocatalysis, fuel cell technologies, biomolecular sensing, surface-enhanced Raman scattering (SERS), and plasmonics. This article summarizes recent advances in some of these areas and, in particular, we focus on the discussion of microstructure, catalytic, and optical properties of nanoporous gold (NPG). With advanced electron microscopy, three-dimensional tomographic reconstructions of NPG have been realized that yield quantitative characterizations of key morphological parameters involved in the intricate structure. Catalytic and electrocatalytic investigations demonstrate that bare NPG is already catalytically active for many important reactions such as CO and glucose oxidation. Surface functionalization with other metals, such as Pt, produces very efficient electrocatalysts, which have been used as promising fuel cell electrode materials with very low precious metal loading. Additionally, NPG and related materials possess outstanding optical properties in plasmonics and SERS. They hold promise to act as highly active, stable, and economically affordable substrates in high-performance instrumentation applications for chemical inspection and biomolecular diagnostics. Finally, we conclude with some perspectives that appear to warrant future investigation.

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Zhou, Xiao‐Li, Yunze Yang, Shaopeng Wang, and Xian‐Wei Liu. "Surface Plasmon Resonance Microscopy: From Single‐Molecule Sensing to Single‐Cell Imaging." Angewandte Chemie International Edition 59, no. 5 (January 27, 2020): 1776–85. http://dx.doi.org/10.1002/anie.201908806.

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Wang, Luqing, Sharmila N. Shirodkar, Zhuhua Zhang, and Boris I. Yakobson. "Defining shapes of two-dimensional crystals with undefinable edge energies." Nature Computational Science 2, no. 11 (November 28, 2022): 729–35. http://dx.doi.org/10.1038/s43588-022-00347-5.

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AbstractThe equilibrium shape of crystals is a fundamental property of both aesthetic appeal and practical importance: the shape and its facets control the catalytic, light-emitting, sensing, magnetic and plasmonic behaviors. It is also a visible macro-manifestation of the underlying atomic-scale forces and chemical makeup, most conspicuous in two-dimensional (2D) materials of keen current interest. If the crystal surface/edge energy is known for different directions, its shape can be obtained by the geometric Wulff construction, a tenet of crystal physics; however, if symmetry is lacking, the crystal edge energy cannot be defined or calculated and thus its shape becomes elusive, presenting an insurmountable problem for theory. Here we show how one can proceed with auxiliary edge energies towards a constructive prediction, through well-planned computations, of a unique crystal shape. We demonstrate it for challenging materials such as SnSe, which is of C2v symmetry, and even AgNO2 of C1, which has no symmetry at all.

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Pedrueza-Villalmanzo, Esteban, Francesco Pineider, and Alexandre Dmitriev. "Perspective: plasmon antennas for nanoscale chiral chemistry." Nanophotonics 9, no. 2 (February 25, 2020): 481–89. http://dx.doi.org/10.1515/nanoph-2019-0430.

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AbstractPlasmon nanoantennas are extensively used with molecular systems for chemical and biological ultra-sensing, for boosting the molecular emissive and energy transfer properties, for nanoscale catalysis, and for building advanced hybrid nanoarchitectures. In this perspective, we focus on the latest developments of using plasmon nanoantennas for nanoscale chiral chemistry and for advancing molecular magnetism. We overview the decisive role nanoplasmonics and nano-optics can play in achieving chirally selective molecular synthesis and separation and the way such processes might be precisely controlled by potentially merging chirality and magnetism at the molecular scale. We give our view on how these insights might lead to the emergence of exciting new fundamental concepts in nanoscale materials science.

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Aslan, Kadir, Patrick Holley, Lydia Davies, Joseph R. Lakowicz, and Chris D. Geddes. "Angular-Ratiometric Plasmon-Resonance Based Light Scattering for Bioaffinity Sensing." Journal of the American Chemical Society 127, no. 34 (August 2005): 12115–21. http://dx.doi.org/10.1021/ja052739k.

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Szunerits, Sabine, and Rabah Boukherroub. "Sensing using localised surface plasmon resonance sensors." Chemical Communications 48, no. 72 (2012): 8999. http://dx.doi.org/10.1039/c2cc33266c.

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Cattabiani, Nicola, Camilla Baratto, Dario Zappa, Elisabetta Comini, Maurizio Donarelli, Matteo Ferroni, Andrea Ponzoni, and Guido Faglia. "Tin Oxide Nanowires Decorated with Ag Nanoparticles for Visible Light-Enhanced Hydrogen Sensing at Room Temperature: Bridging Conductometric Gas Sensing and Plasmon-Driven Catalysis." Journal of Physical Chemistry C 122, no. 9 (February 5, 2018): 5026–31. http://dx.doi.org/10.1021/acs.jpcc.7b09807.

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Lee, Eunji, Woomi Gwon, and Sangwoo Ryu. "Nucleation and Growth-Controlled Morphology Evolution of Cu Nanostructures During High-Pressure Thermal Evaporation." Korean Journal of Metals and Materials 59, no. 2 (February 5, 2021): 135–41. http://dx.doi.org/10.3365/kjmm.2021.59.2.135.

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The formation of porous material structures has been widely investigated for the development of high-performance energy materials, catalysts, and chemical sensing devices. Various nanoporous structure fabrication methods are based on wet-chemical processes, which require precise control of the process parameters. Physical vapor deposition such as thermal evaporation utilizes high vacuum so that the deposition process is relatively simple, free of contamination, and easily reproduced. However, because of the long mean-free-path of the evaporated atoms in high vacuum, heterogeneous nucleation and the growth of adatoms occurs on the substrate surface, which results in the formation of dense and compact thin films. But by changing the working pressure, various morphologies of porous nanostructures can be obtained. As applied to copper, with increasing pressure the thin film evolves from a dense structure to a coral-like nanoporous structure through a porous columnar structure. All of the porous structures consist of nanoparticle aggregates, where copper nanoparticles are connected to each other, and many nano-gaps are found inside the aggregates. A surface plasmonic effect is expected. The porous copper nanostructured films demonstrated high surfaceenhanced Raman spectroscopy activity.

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Dahlin, Andreas, Michael Zäch, Tomas Rindzevicius, Mikael Käll, Duncan S. Sutherland, and Fredrik Höök. "Localized Surface Plasmon Resonance Sensing of Lipid-Membrane-Mediated Biorecognition Events." Journal of the American Chemical Society 127, no. 14 (April 2005): 5043–48. http://dx.doi.org/10.1021/ja043672o.

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Ruach-Nir, Irit, Tatyana A. Bendikov, Ilanit Doron-Mor, Zahava Barkay, Alexander Vaskevich, and Israel Rubinstein. "Silica-Stabilized Gold Island Films for Transmission Localized Surface Plasmon Sensing." Journal of the American Chemical Society 129, no. 1 (January 2007): 84–92. http://dx.doi.org/10.1021/ja064919f.

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Fagadar-Cosma, Eugenia, Anca Lascu, Sergiu Shova, Mirela-Fernanda Zaltariov, Mihaela Birdeanu, Lilia Croitor, Adriana Balan, Diana Anghel, and Serban Stamatin. "X-ray Structure Elucidation of a Pt-Metalloporphyrin and Its Application for Obtaining Sensitive AuNPs-Plasmonic Hybrids Capable of Detecting Triiodide Anions." International Journal of Molecular Sciences 20, no. 3 (February 7, 2019): 710. http://dx.doi.org/10.3390/ijms20030710.

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The development of UV–vis spectrophotometric methods based on metalloporphyrins for fast, highly sensitive and selective anion detection, which avoids several of the practical challenges associated with other detection methods, is of tremendous importance in analytical chemistry. In this study, we focused on achieving a selective optical sensor for triiodide ion detection in traces based on a novel hybrid material comprised of Pt(II) 5,10,15,20-tetra(4-methoxy-phenyl)-porphyrin (PtTMeOPP) and gold nanoparticles (AuNPs). This sensor has high relevance in medical physiological tests. The structure of PtTMeOPP was investigated by single crystal X-ray diffraction in order to understand the metal surroundings and the molecule conformation and to assess if it qualifies as a potential sensitive material. It was proven that the Pt-porphyrin generated 1D H-bond supramolecular chains due to the weak C-H···O intermolecular hydrogen bonding. The presence of ordered voids in the crystal encouraged us to use PtTMeOPP as the sensing material for triiodide ion and to enhance its potential in a novel AuNPs/PtTMeOPP hybrid by the synergistic effects provided by the plasmonic gold nanoparticles. The spectrophotometric sensor is characterized by a detection limit of 1.5 × 10−9 M triiodide ion concentration and a remarkable confidence coefficient of 99.98%.

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Journal articles on the topic 'Plasmonic sensing and catalysis'

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