Готові списки джерел за темами / Nanospheres Lithography

Добірка наукової літератури з теми "Nanospheres Lithography"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Nanospheres Lithography"

1

Inns, Daniel, Patrick Campbell, and Kylie Catchpole. "Wafer Surface Charge Reversal as a Method of Simplifying Nanosphere Lithography for Reactive Ion Etch Texturing of Solar Cells." Advances in OptoElectronics 2007 (July 31, 2007): 1–4. http://dx.doi.org/10.1155/2007/32707.

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A simplified nanosphere lithography process has been developed which allows fast and low-waste maskings of Si surfaces for subsequent reactive ion etching (RIE) texturing. Initially, a positive surface charge is applied to a wafer surface by dipping in a solution of aluminum nitrate. Dipping the positive-coated wafer into a solution of negatively charged silica beads (nanospheres) results in the spheres becoming electrostatically attracted to the wafer surface. These nanospheres form an etch mask for RIE. After RIE texturing, the reflection of the surface is reduced as effectively as any other nanosphere lithography method, while this batch process used for masking is much faster, making it more industrially relevant.
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Kasmi, Sofiane, Jeanne Solard, Inga Tijunelyte, Alexis P. A. Fischer, Marc Lamy de la Chapelle, and Nathalie Lidgi-Guigui. "Tunable Multilayers of Self-Organized Silica Nanospheres by Spin Coating." Journal of Nanomaterials 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/6075610.

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The coating of fused silica by an organized layer of silica nanospheres (NS) is an important issue for the design of optical and topographic properties especially for lithography techniques such as nanosphere lithography (NSL) or nanosphere photolithography (NSPL). Here, the spin coating of NS dispersed in N,N-dimethylformamide (DMF) is studied. The role of the NS diameter, the spin-coating acceleration, and the volume fraction are the parameters to take into account for the formation and organization of NS in single or double closely packed layers. We propose an explanation for this behavior based on the transition between sedimentation and a viscous regime on the basis of the silica NS organization.
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3

Ai, Bin, and Yiping Zhao. "Glancing angle deposition meets colloidal lithography: a new evolution in the design of nanostructures." Nanophotonics 8, no. 1 (October 6, 2018): 1–26. http://dx.doi.org/10.1515/nanoph-2018-0105.

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AbstractThe combination of colloidal lithography and glancing angle deposition facilitates a new powerful fabrication technique – shadow sphere lithography (SSL), which can greatly expand the variety and complexity of nanostructures fabricated using simple evaporation and colloidal monolayer templates. Their applications have been widely investigated in plasmonics and associated fields. Here, we present an overview of the principle of SSL, followed by different strategies of utilizing SSL to design various nanostructures by changing the nanosphere monolayer masks, deposition configurations, different ways to combine deposition and etching, etc. Typical nanostructures fabricated by SSL, including nanorods on nanospheres, patchy nanospheres, nanotriangles, nanoring, nanocrescents, etc., are introduced. Recent optical applications of these plasmonic nanostructures are also summarized. It is expected that this review will inspire more ingenious designs of plasmonic nanostructures by SSL for advanced and smart applications.
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4

Colson, Pierre, Catherine Henrist, and Rudi Cloots. "Nanosphere Lithography: A Powerful Method for the Controlled Manufacturing of Nanomaterials." Journal of Nanomaterials 2013 (2013): 1–19. http://dx.doi.org/10.1155/2013/948510.

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Анотація:
The never-ending race towards miniaturization of devices induced an intense research in the manufacturing processes of the components of those devices. However, the complexity of the process combined with high equipment costs makes the conventional lithographic techniques unfavorable for many researchers. Through years, nanosphere lithography (NSL) attracted growing interest due to its compatibility with wafer-scale processes as well as its potential to manufacture a wide variety of homogeneous one-, two-, or three-dimensional nanostructures. This method combines the advantages of both top-down and bottom-up approaches and is based on a two-step process: (1) the preparation of a colloidal crystal mask (CCM) made of nanospheres and (2) the deposition of the desired material through the mask. The mask is then removed and the layer keeps the ordered patterning of the mask interstices. Many groups have been working to improve the quality of the CCMs. Throughout this review, we compare the major deposition techniques to manufacture the CCMs (focusing on 2D polystyrene nanospheres lattices), with respect to their advantages and drawbacks. In traditional NSL, the pattern is usually limited to triangular structures. However, new strategies have been developed to build up more complex architectures and will also be discussed.
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5

Li, Jie, Yongxu Hu, Li Yu, Lin Li, Deyang Ji, Liqiang Li, Wenping Hu, and Harald Fuchs. "Nanospheres Lithography: Recent Advances of Nanospheres Lithography in Organic Electronics (Small 28/2021)." Small 17, no. 28 (July 2021): 2170145. http://dx.doi.org/10.1002/smll.202170145.

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Wang, Zhenming, Jianxun Liu, Xiaoguo Fang, Jiawei Wang, Zhen Yin, Huilin He, Shouzhen Jiang, et al. "Plasmonically enhanced photoluminescence of monolayer MoS2 via nanosphere lithography-templated gold metasurfaces." Nanophotonics 10, no. 6 (March 24, 2021): 1733–40. http://dx.doi.org/10.1515/nanoph-2020-0672.

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Abstract We demonstrate a simple, cost-effective method to enhance the photoluminescence intensity of monolayer MoS2. A hexagonal symmetric Au metasurface, made by polystyrene nanosphere lithography and metal coating, is developed to enhance the photoluminescence intensity of monolayer MoS2. By using nanospheres of different sizes, the localized surface plasmon resonances of the Au metasurfaces can be effectively tuned. By transferring monolayer MoS2 onto the Au metasurface, the photoluminescence signal of the monolayer MoS2 can be significantly enhanced up to 12-fold over a square-centimeter area. The simple, large-area, cost-effective fabrication technique could pave a new way for plasmon-enhanced light-mater interactions of atomically thin two-dimensional materials.
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Domonkos, Mária, and Alexander Kromka. "Nanosphere Lithography-Based Fabrication of Spherical Nanostructures and Verification of Their Hexagonal Symmetries by Image Analysis." Symmetry 14, no. 12 (December 14, 2022): 2642. http://dx.doi.org/10.3390/sym14122642.

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Анотація:
Nanosphere lithography (NSL) is a cost- and time-effective technique for the fabrication of well-ordered large-area arrays of nanostructures. This paper reviews technological challenges in NSL mask preparation, its modification, and quality control. Spin coating with various process parameters (substrate wettability, solution properties, spin coating operating parameters) are discussed to create a uniform monolayer from monodisperse polystyrene (PS) nanospheres with a diameter of 0.2–1.5 μm. Scanning electron microscopy images show that the PS nanospheres are ordered into a hexagonal close-packed monolayer. Verification of sphere ordering and symmetry is obtained using our open-source software HEXI, which can recognize and detect circles, and distinguish between hexagonal ordering and defect configurations. The created template is used to obtain a wide variety of tailor-made periodic structures by applying additional treatments, such as plasma etching (isotropic and anisotropic), deposition, evaporation, and lift-off. The prepared highly ordered nanopatterned arrays (from circular, triangular, pillar-shaped structures) are applicable in many different fields (plasmonics, photonics, sensorics, biomimetic surfaces, life science, etc.).
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Li, Jie, Yongxu Hu, Li Yu, Lin Li, Deyang Ji, Liqiang Li, Wenping Hu, and Harald Fuchs. "Recent Advances of Nanospheres Lithography in Organic Electronics." Small 17, no. 28 (May 21, 2021): 2100724. http://dx.doi.org/10.1002/smll.202100724.

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9

Cara, Eleonora, Federico Ferrarese Lupi, Matteo Fretto, Natascia De Leo, Mauro Tortello, Renato Gonnelli, Katia Sparnacci, and Luca Boarino. "Directed Self-Assembly of Polystyrene Nanospheres by Direct Laser-Writing Lithography." Nanomaterials 10, no. 2 (February 7, 2020): 280. http://dx.doi.org/10.3390/nano10020280.

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In this work, we performed a systematic study on the effect of the geometry of pre-patterned templates and spin-coating conditions on the self-assembling process of colloidal nanospheres. To achieve this goal, large-scale templates, with different size and shape, were generated by direct laser-writer lithography over square millimetre areas. When deposited over patterned templates, the ordering dynamics of the self-assembled nanospheres exhibits an inverse trend with respect to that observed for the maximisation of the correlation length ξ on a flat surface. Furthermore, the self-assembly process was found to be strongly dependent on the height (H) of the template sidewalls. In particular, we observed that, when H is 0.6 times the nanospheres diameter and spinning speed 2500 rpm, the formation of a confined and well ordered monolayer is promoted. To unveil the defects generation inside the templates, a systematic assessment of the directed self-assembly quality was performed by a novel method based on Delaunay triangulation. As a result of this study, we found that, in the best deposition conditions, the self-assembly process leads to well-ordered monolayer that extended for tens of micrometres within the linear templates, where 96.2% of them is aligned with the template sidewalls.
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Zhou, Xiaodong, Selven Virasawmy, Wolfgang Knoll, Kai Yu Liu, Man Siu Tse, and Li Wei Yen. "Fabrication of Gold Nanocrescents by Angle Deposition with Nanosphere Lithography for Localized Surface Plasmon Resonance Applications." Journal of Nanoscience and Nanotechnology 8, no. 7 (July 1, 2008): 3369–78. http://dx.doi.org/10.1166/jnn.2008.147.

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The gold nanostructures fabricated on a substrate yield localized surface plasmon resonance. We describe the fabrication and characterization of nanocrescents on a silicon substrate, which are fabricated by depositing a gold film at an oblique angle through nanosphere lithography. Following the etching of the gold perpendicular to the substrate and the removal of the nanospheres by dissolution, nanocrescents with fine nanostructures are generated. By varying the deposition angle of the gold film from 0° to 72°, nanorings, 2D and 3D nanocrescents can be obtained. During the nanocrescent fabrication, we also compared the deposition angle difference between the e-beam and thermal evaporators for oblique depositions of the gold. The 3D nanocrescents fabricated in our experiments are expected to have improved sensitivity in localized surface plasmon resonance measurements when compared to the previously reported 2D nanocrescents, which enable broader biosensor applications. Simulations of the profiles of these 3D nanocrescents using solid geometry show good consistency with the fabricated ones.
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Дисертації з теми "Nanospheres Lithography"

1

Perotto, Giovanni. "TWO DIMENSIONAL SELF ASSEMBLY OF NANOSPHERES, A VERSATILE METHOD FOR NANOFABRICATION." Doctoral thesis, Università degli studi di Padova, 2010. http://hdl.handle.net/11577/3422011.

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Nanotechnology is one of the most innovative and multidisciplinary fields in modern research. Techniques to manipulate and control matter at the nanometric scale, giving the possibility to change the morphology and the physical and chemical properties are growing in number. At the nano scale, changing the morphology implies changing also the properties of matter: many properties are no longer intrinsic but they depend on the size, shape, and even on the environment. One of the most striking example is given by gold and silver colour when they are in the nanoparticle form. Gold, for example ould be vine-red or green, or bluish or black simply by changing the morphology of the particles. Appropriate manipulation of the matter could also give birth at new proprieties such as the transmission of light through holes much smaller that the light wavelength, allowing the possibility to control at a very intimate scale the propagation of light. It is clear that to exploit the great potential of nanotechnology it is important to have nanofabrication techniques that have a very precise control on the production of nanometric materials or materials with nanometric structures. There are many technologies that can produce structures with an outstanding resolution of just a few nanometer (Electron Beam Lithography, Focused Ion Beam). These technologies are ”serial” fabrication tool, they can produce one object at time and this means high costs and low throughput. On the other hand parallel technologies derive from the semiconductor industry and are mostly optical lithographic methods that are limited by the diffraction limit of light (200nm). In this thesis work the need for a nanofabrication tool that can allow the production of smaller nanostructures will be addressed by using a nanofabrication tool that meets the following criteria: • parallel processing • low cost • large area processing (cm2) • scalability • reproducibility • easy implementation We choose to exploit the ability of self aggregation of matter in ordered structures. In particular we exploited the tendency of spherical monodisperse nanoparticles to assemble in ordered, close packed structures known as colloidal crystals. One monolayer of such colloidal crystal is a very interesting structure because it has a well ordered array of pores among the particles that have a well defined size and shape, that could be tuned by simply changing the size of the self assembled colloidal particles. A simple and easy method to create and deposit on different substrate these self assembled monolayer of polystyrene nanoparticles will be presented. Monolayers will be used to synthesize arrays of monodisperse plasmonic nanoparticles with a very good control on their size and shape, allowing the tuning of the plasmonic proprieties on the desired application. We will use the array of plasmonic nanoparticles to realize molecular sensors and to amplify the Raman signal by the Surface Enhanced Raman Scattering effect. We will study the rise in temperature induced by illumination with a laser light resonant with the nanoparticle’s plasmonic transition. This information could be very interesting for the biological application of the nanoparticles arrays since temperature variation in such a very complex environment could have relevant effect. Moreover we will use these 2D colloidal crystal to synthesize different kinds of nanostructures like an array of holes in a metal film. This nanostructure is very interesting since the discovery of its ability to transmit light even if the hole size is much smaller than the light’s wavelength. A synthesis method based on self assembled nanospheres could be useful for the fabrication of such nanostructures because of its high flexibility in changing the nanoparticles size and so the array geometric parameters like hole size and the lattice period. Self assembled monolayers will be used as a template for the synthesis of nanostructured thin films of TiO2. Titania is a semiconductor of great technological interest in many different fields: catalysis, energy conversion, gas sensing. We will fabricate using the same technology two different nanostructured thin film: a macroporous thin films and a surface patterned with a nanobowl pattern. Finally we will demonstrate the use of self assembled monolayers coupled with a standard technology used in the semiconductor industry such the ion implantation. Nanometric patterns will be produced on Si wafers using the ordered monolayer as a mask for the ion beam.
Il campo delle nanotecnologie è uno dei più innovativi e multidisciplinari della ricerca moderna. Sempre pi`u numerose diventano le tecniche per manipolare la materia su scala nanometrica, modificando così le proprietà fisico, chimiche e morfologiche a livelli mai raggiunti prima. Alla nano scala la manipolazione morfologica è accompagnata dal cambiamento delle proprietà che smettono di essere intrinseche della materia ma diventano dipendenti da altri fattori come la forma, la dimensione e l’ambiente in cui le nanostrutture sono immerse. Uno dei casi più eclatanti è il colore dell’oro e dell’argento quando sono sottoforma di particelle nanometriche. L’oro, ad esempio, può essere di colore rosso-vino, verde, blu e nero, semplicemente cambiando la forma o l’ambiente attorno ad esso. Manipolando la materia opportunamente possono comparire nuove proprietà come la trasmissione della luce attraverso aperture che sono molto più piccole della lunghezza d’onda della luce, dando la possibilità di ottenere il controllo della propagazione della luce ad un livello molto intimo. Si può capire quindi come per poter sfruttare le enormi potenzialità offerte dalle nanotecnologie sia importante avere tecnologie di fabbricazione che permettano un preciso controllo nella produzione di oggetti nanometrici o con strutture nanometriche. Le tecnologie al momento disponibili che permettono di creare strutture con precisione molto elevata (pochi nanometri) sono tecnologie ”seriali” come l’Electron Beam Lithography o il Focused Ion Beam. Queste tecniche sono limitate alla produzione di un oggetto alla volta e quindi comportano costi elevati e lunghi tempi. Le tecnologie ”parallele” derivano dall’industria dei semiconduttori e sono tecniche litografiche che hanno come limite la risoluzione della luce utilizzata ( 200nm). In questo lavoro di tesi si cercherà di dare risposta alla domanda di tecniche di fabbricazione di strutture nanometriche utilizzando una tecnica che abbia le seguenti caratteristiche: • quickness • low cost • ability to synthesize very small nanostructures • reproducibility • easy implementation Si è scelto di utilizzare la capacità della materia di organizzarsi spontaneamente in strutture ordinate. In particolare si è sfruttata la tendenza di nanoparticelle sferiche di polistirene ad impaccarsi in strutture compatte ed ordinate costituendo dei ”cristalli colloidali”. Un singolo strato di nanosfere autoassemblate è una struttura interessante perchè presenta dei pori tra le particelle di forma e dimensioni ben definite, che possono essere modificate cambiando le dimensioni delle sfere che costituiscono il cristallo bidimensionale. Verrà illustrato un metodo semplice e rapido per ottenere questi monostrati di particelle ordinate e per poterli depositare su vari substrati. Questi cristalli bidimensionali verranno utilizzati per depositare una matrice ordinata di nanoparticelle plasmoniche, con un ottimo controllo sulla loro forma e dimensioni, consentendo di realizzare particelle con proprietà su misura per l’applicazione desiderata. Verranno anche studiate applicazioni di queste nanoparticelle come sensori di molecole e per amplificare il segnale Raman grazie all’effetto SERS. Verrà inoltre studiato l’aumento di temperatura di queste nanoparticelle quando vengono illuminate da un laser risonante con la loro risonanza di plasma di superficie. Per applicazioni spettroscopiche applicate a sistemi biologici il cambiamento di temperatura può avere effetti rilevanti in un ambiente complesso come quello biologico. In seguito verrà dimostrato come questi cristalli colloidali bidimensionali possono essere utilizzati per creare altre classi di nanostrutture, come ad esempio una matrice di buchi nanometrici in un film metallico. Queste strutture sono studiate da quando è stato scoperta la loro capacità di far trasmettere attraverso strutture che sono molto minori del limite di diffrazione per le lunghezze d’onda trasmesse. Una sintesi che si basa sulle nanosfere autoassemblate può essere interessante per queste strutture grazie alla sua intrinseca flessibilità. Si possono infatti cambiare in modo molto semplice i parametri geometrici che caratterizzano la matrice di buchi quali le dimensioni dei buchi e il periodo degli stessi. Un’altra tipologia di nanostrutture che verrà realizzata sono film sottili nanostrutturati di TiO2. La titania è un semiconduttore di grande interesse tecnologico in molti campi diversi: dalla catalisi, alla conversione di energia ai sensori di gas. Verranno fabbricati, con la stessa tecnologia, dei film con una porosità ordinata e delle superfici nanostrutturate con un motivo a incavi. Infine verrà dimostrata la possibilità di utilizzare i cristalli colloidali 2D accoppiati con una tecnologia molto utilizzata dall’industria dei semiconduttori quale l’impiantatore ionico. Pattern nanometrici verranno realizzati su silicio utilizzando le nanoparticelle autoassemblate come maschera per il fascio ionico.
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2

Matcheswala, Akil Mannan. "GOLD NANOSPHERES AND GOLD NANORODS AS LOCALIZED SURFACE PLASMON RESONANCE SENSORS." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_theses/60.

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A novel localized surface plasmon resonance (LSPR) sensor that differentiates between background refractive index changes and surface-binding of a target analyte (e.g. a target molecule, protein, or bacterium) is presented. Standard, single channel LSPR sensors cannot differentiate these two effects as their design allows only one mode to be coupled. This novel technique uses two surface plasmon modes to simultaneously measure surface binding and solution refractive index changes. This increases the sensitivity of the sensor. Different channels or modes can be created in sensors with the introduction of gold nanospheres or gold nanorods that act as receptor mechanisms. Once immobilization was achieved on gold nanospheres, the technique was optimized to achieve the same immobilization for gold nanorods to get the expected dual mode spectrum. Intricate fabrication methods are illustrated with using chemically terminated self assembled monolayers. Then the fabrication process advances from chemically silanized nanoparticles, on to specific and systematic patterns generated with the use of Electron Beam Lithography. Comparisons are made within the different methods used, and guidelines are set to create possible room for improvement. Some methods implemented failed, but there was a lot to learn from these unsuccessful outcomes. Finally, the applications of the dual mode sensor are introduced, and current venues where the sensors can be used in chemical and biological settings are discussed.
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3

Kandulski, Witold. "Shadow nanosphere lithography." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985533013.

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4

Paudel, Trilochan. "Nanosphere Lithography for Nano Optical Applications." Thesis, Boston College, 2011. http://hdl.handle.net/2345/3155.

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Thesis advisor: Zhifeng Ren
Thesis advisor: Krzysztof Kempa
Many different techniques are available to create nanopatterns in nanoscale devices. However, a few are flexible and inexpensive enough to be practical in the nanotechnology. Here, we study the nanosphere lithography (NSL) based on a self-assembly of microspheres. Using this technique, we have developed various patterns in metallic films, ranging from honeycomb arrays of "quasi-triangles" to circular holes. These various patterns have been used subsequently either as nano-optical structures directly, with remarkable optical and plasmonic properties, or as substrates for further nano-processing. In one such nano-processing, the "quasi-triangle" patterns were used as a catalyst for carbon nanotube growth. The resulting aligned arrays of carbon nanotubes were employed in nanocoax solar cells. In another nano-processing, the arrays were used as masks for electrodeposition. In addition to the nano processing and measurements, we have employed the FDTD computer simulations, to develop a full understanding of the nano-optical and plasmonic properties of the developed structures
Thesis (PhD) — Boston College, 2011
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Physics
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5

Gleason, Russell. "Nanosphere lithography applied to magnetic thin films." Thesis, California State University, Long Beach, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1524199.

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Magnetic nanostructures have widespread applications in many areas of physics and engineering, and nanosphere lithography has recently emerged as promising tool for the fabrication of such nanostructures. The goal of this research is to explore the magnetic properties of a thin film of ferromagnetic material deposited onto a hexagonally close-packed monolayer array of polystyrene nanospheres, and how they differ from the magnetic properties of a typical flat thin film. The first portion of this research focuses on determining the optimum conditions for depositing a monolayer of nanospheres onto chemically pretreated silicon substrates (via drop-coating) and the subsequent characterization of the deposited nanosphere layer with scanning electron microscopy. Single layers of permalloy (Ni80Fe20) are then deposited on top of the nanosphere array via DC magnetron sputtering, resulting in a thin film array of magnetic nanocaps. The coercivities of the thin films are measured using a home-built magneto-optical Kerr effect (MOKE) system in longitudinal arrangement. MOKE measurements show that for a single layer of permalloy (Py), the coercivity of a thin film deposited onto an array of nanospheres increases compared to that of a flat thin film. In addition, the coercivity increases as the nanosphere size decreases for the same deposited layer. It is postulated that magnetic exchange decoupling between neighboring nanocaps suppresses the propagation of magnetic domain walls, and this pinning of the domain walls is thought to be the primary source of the increase in coercivity.

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6

Murray, William Andrew. "Optical properties of nanoscale silver structures fabricated by nanosphere lithography." Thesis, University of Exeter, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421567.

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7

Демиденко, Максим Геннадійович, Максим Геннадьевич Демиденко, Maksym Hennadiiovych Demydenko, Максим Миколайович Іващенко, Максим Николаевич Иващенко та Maksym Mykolaiovych Ivashchenko. "Сучасні технології отримання наноструктурованих поверхонь: micro/nanopatterning, nanoparticles, nanosphere lithography". Thesis, Видавництво СумДУ, 2008. http://essuir.sumdu.edu.ua/handle/123456789/4327.

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8

Stoianov, Stefan Vladimirov. "Properties modification of nanopatterned surfaces functionalized with photo activated ligands." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/40434.

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This dissertation focuses on four research topics: self-assembly of colloidal nanoparticles, surface modifications of the properties of ionically self-assembled multilayer films, surface enhanced Raman spectroscopy of functionalized gold nanoparticles, and two photon uncaging in gel. Those techniques are used for development of novel nanofabrication methods for top-down and bottom-up assembly of nanostructures, by modifying the properties of nanopatterned surfaces with photoactive ligands, and other technologies. First I describe the development of an improved method for nanosphere lithography, a variation of the convective self-assembly technique. The method exhibited high reproducibility and yielded high quality monolayer crystals by withdrawing a meniscus of liquid polystyrene spheres solution and subsequent evaporation of the solvent. The monolayer crystal was used as an evaporation mask to create surface arrays of gold nanotriangular particles. Metal nanoparticles, with sharp features or narrow gaps, exhibit strong plasmonic properties. I took advantage of those properties to attempt to create patchy modifications of the surface functionalization of gold nanotriangular particles treated with photosensitive molecules. Two molecules denoted, P3-DTC, and LIP3, were used as functional molecules attached to the gold nanoparticles. After interaction with 356nm UV light, part of those molecules cleaves off the surface of the nanoparticles rendering the surface modified with a new functional group. The modification takes place only at the plasmonic hot spots of those nanoparticles, resulting in a patchy modification of the properties of the nanoparticles. I built polymer Ionically Self-assembled Multilayer (ISAM) films using a Layer-by-Layer deposition technique and treated them to alter their surface adhesion properties. Poly (allylamine hydrochloride) (PAH), and poly (styrene sulfonate) (PSS) are a very well-studied system of polyelectrolytes for LbL deposition. ISAM films built from those polyelectrolytes are rich in amine groups to which nanoparticles, cells, tissue cultures, ligands can be made to adhere. In my work I developed a method for selective modification of the surface adhesiveness, by neutralizing the amine groups trough acetylation with acetic anhydride. With resolution from a few microns to a few hundred nanometers, I selectively passivated some areas of the ISAM film while others I left unaltered. I tested the effect of the acetic anhydride passivation by performing Horse Radish Peroxidase (HRP) test which quantifies the amount of free amines on the surface of the film. I also demonstrated the patchy modification of surface adhesiveness by introducing gold nanospheres which attached only to the amine active areas of the modified ISAM film. Photoactivatable fluorophores, i.e. compounds and other entities that may transform into a fluorescent form on absorption of a photon can be employed in multidimetional volume patterning. I studied the photoactivation of aryl azides in gelatin matrix. Specifically, I used Azidocoumarin 151 as a test molecule to undergo two-photon activation, and then measured the resulting photoluminescence. The activation of the Azidocoumarin 151 can be used to create arbitrary 3D patterns of modified functionality inside the gel. The activated molecules can be used as sites for further modification of the patterning inside the volume of the gel. Possible modifications include attaching biomolecules, nanoparticles, or individual cells. Acknowledgements I would like to acknowledge my adviser Hans Robinson for giving me the opportunity to work on several very interesting projects. Dr. Robinson has thought me critical thinking and supported greatly my research in his laboratory. He was always kind and willing to discuss scientific ideas and therefore contributed to my development as a successful graduate student. Iâ d like to also thank Dr. Richie Davis and Dr. Webster Santons for the useful discussions about my projects. I had the great pleasure to work closely with several graduate students during my time at Virginia Tech. Kai Chen, helped me get into the field of polymer self assembled films. I worked closely with Jason Ridley on modifying surface properties of ISAM films. Brandon Thorpe has been a constant supplier of a variety of compounds that I used in my SERS studies. Iâ d like to thank my fellow graduate students from Dr. Robinsonâ s group, Chih-Yu Jao, Eric See, Kirby Mayers, for being great company and lending help when I need it. During my stay at Virginia Tech I have met some wonderful faculty and staff at the Department of Physics. They were all very helpful, but Iâ d like to extend special thanks to Chris Thomas, Dr. Ghiti Khodaparast, Dr. Mark Pitt, Dr. Tetsuro Mizutani, and Randy Heflin. Finally, Iâ d like to thank my wife Elitsa for being patient during my time as a graduate student. Iâ d like to also thank my daughter Eleonora and son Alexander for being the cutest kids in the world and for cheering me up all the time.
Ph. D.
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9

Sirotkin, Evgeny. "Macroscopic Arrays of Ferromagnetic Nano-elements Produced by Etched Nanosphere Lithography." Thesis, University of Exeter, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520489.

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10

Patoka, Piotr [Verfasser]. "Tunable plasmonic properties of nanostructures fabricated by shadow nanosphere lithography / Piotr Patoka." Berlin : Freie Universität Berlin, 2011. http://d-nb.info/102549024X/34.

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Частини книг з теми "Nanospheres Lithography"

1

Waegner, Martin. "Nanosphere Lithography." In Bio and Nano Packaging Techniques for Electron Devices, 269–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28522-6_12.

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2

Li, Kwai Hei, and Hoi Wai Choi. "Photonic Crystal Light-Emitting Diodes by Nanosphere Lithography." In Handbook of Solid-State Lighting and LEDs, 393–436. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2017] | Series: Series in optics and optoelectronics ; 25: CRC Press, 2017. http://dx.doi.org/10.1201/9781315151595-21.

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3

Rybczynski, J., M. Hilgendorff, and M. Giersig. "Nanosphere Lithography — Fabrication of Various Periodic Magnetic Particle Arrays Using Versatile Nanosphere Masks." In Low-Dimensional Systems: Theory, Preparation, and Some Applications, 163–72. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0143-4_14.

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Singh, Anuj Kumar, Anand Kumar, Saurabh Dixit, and Anshuman Kumar. "Interaction of Light with Plasmonic Nanostructures Fabricated by Nanosphere Lithography." In Springer Proceedings in Physics, 821–24. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9259-1_189.

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5

Yuen, Wai, and Hoi Wai. "Nanosphere Lithography for Nitride Semiconductors." In Lithography. InTech, 2010. http://dx.doi.org/10.5772/8196.

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6

"Lithography: Nanofabrication with Nanosphere Lithography." In CRC Concise Encyclopedia of Nanotechnology, 458–68. CRC Press, 2016. http://dx.doi.org/10.1201/b19457-41.

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"Nanosphere Lithography for High-Density Nanopatterning." In Vistas in Nanofabrication, 15–42. Jenny Stanford Publishing, 2012. http://dx.doi.org/10.1201/b12779-2.

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8

Zhong, Zhenyang, Tong Zhou, Yiwei Sun, and Jie Li. "A Feasible Routine for Large-Scale Nanopatterning via Nanosphere Lithography." In Recent Advances in Nanofabrication Techniques and Applications. InTech, 2011. http://dx.doi.org/10.5772/23967.

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Song, Yujun. "Controlled Fabrication of Noble Metal Nanomaterials via Nanosphere Lithography and Their Optical Properties." In Recent Advances in Nanofabrication Techniques and Applications. InTech, 2011. http://dx.doi.org/10.5772/25037.

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Тези доповідей конференцій з теми "Nanospheres Lithography"

1

Lu, Ying-Chou, Yi-Chen Lai, Jia-Han Li, and Chun-Hway Hsueh. "Fabrication of periodic bowtie structure on vanadium dioxide by nanosphere lithography for smart window applications." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.5p_a410_9.

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Анотація:
Nanophotonics has been extensively researched in the past decades owing to the rapid development of the precision nanofabrication techniques, such as focused-ion beam milling and electron-beam lithography. However, it was limited by some disadvantages, such as high cost and low productivity. Therefore, a facile and economics method, nanosphere lithography (NSL) [1], for fabricating multiple nanostructures has been reported. Polystyrene nanospheres, with diameters of several hundred nanometers, were aligned into a monolayer. By using close-packed polystyrene nanospheres array as a mask, periodic metal bowties can be fabricated after metal evaporation and nanospheres lift-off.
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2

Han, Li-Hsin, Arvind Battula, and Shaochen Chen. "Surface Plasmons in Light Interaction With Metallic Nanostructures and Applications." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52289.

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In this invited paper, we present the surface plasmons effect as a result of light interaction with metallic nanostructures such as a gold nanosphere or an array of gold nano-slits. Numerical simulation using a finite difference time domain method coupled with Drude model revealed the light enhancement near the gold nanostructures due to the surface plasmon effect. Experimentally, we demonstrated such effect in laser deformation of a polymer shell coated with gold nanospheres. We also employed such enhanced light field for nanoscale lithography.
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3

Zhou, Jianming, Yongfa Fan, and Bruce W. Smith. "Three-dimensional imaging of 30-nm nanospheres using immersion interferometric lithography." In SPIE 31st International Symposium on Advanced Lithography, edited by Donis G. Flagello. SPIE, 2006. http://dx.doi.org/10.1117/12.656544.

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Kim, Sangpyeong, Chaomin Zhang, Som Dahal, Stuart Bowden, and Christiana B. Honsberg. "Gallium Phosphide nanostructure on Silicon by Silica nanospheres lithography and Metal Assisted Chemical Etching." In 2017 IEEE 44th Photovoltaic Specialists Conference (PVSC). IEEE, 2017. http://dx.doi.org/10.1109/pvsc.2017.8366713.

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Shuhong Li, Lifang Shi, Zheng Yang, Xia Huang, Zhiyou Zhang, Fuhua Gao, Yongkang Guo, Weixing Yu, and Jinglei Du. "Immersed nanospheres super-lithography for the fabrication of sub-70nm nanoholes with period below 700nm." In 2012 IEEE 12th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2012. http://dx.doi.org/10.1109/nano.2012.6322119.

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Jourlin, Yves, Nicolas N. Crespo-Monteiro, and Arnaud Valour. "Direct patterning of TiO2 and TiN based sol-gel using laser interference and nanospheres UV lithography." In UV and Higher Energy Photonics: From Materials to Applications 2021, edited by Gilles Lérondel, Yong-Hoon Cho, and Atsushi Taguchi. SPIE, 2021. http://dx.doi.org/10.1117/12.2596229.

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Jourlin, Yves, Nicolas Crespo-Monteiro, Victor Vallejo Otero, Marie Traynar, Maria Usuga Higuita, and Emilie GAMET. "Laser interference and nanospheres UV lithography to produce micro and nanostructured TiO2 and TiN based sol-gel layers." In UV and Higher Energy Photonics: From Materials to Applications 2022, edited by Gilles Lérondel, Yong-Hoon Cho, and Atsushi Taguchi. SPIE, 2022. http://dx.doi.org/10.1117/12.2635170.

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Lu, Ying-Chou, and Chun-Hway Hsueh. "Plasmonic and optical properties of periodic silver nanoprism array fabricated by H2O2-assisted nanosphere lithography." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2018. http://dx.doi.org/10.1364/jsap.2018.18p_211b_13.

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9

Lozhkina, O. A., M. S. Lozhkin, and Yu V. Kapitonov. "Nanodisk fabrication by nanosphere lithography." In MEDICAL PHYSICS: Fourteenth Mexican Symposium on Medical Physics. Author(s), 2016. http://dx.doi.org/10.1063/1.4954349.

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10

Laurvick, Tod V., Ronald A. Coutu, and Robert A. Lake. "Integrating nanosphere lithography in device fabrication." In SPIE Advanced Lithography, edited by Christoph K. Hohle and Todd R. Younkin. SPIE, 2016. http://dx.doi.org/10.1117/12.2218562.

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