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Dissertations / Theses on the topic 'Plasmonic Nanoparticles(Au, Ag)'

Author: Grafiati

Published: 7 September 2023

Last updated: 31 July 2025

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1

Adamiv, V. T., P. Yu Demchenko, R. M. Dutka, R. V. Gamernyk, Yu O. Kulyk, and I. M. Teslyuk. "Determination of Sizes of Ag Nanoparticles in Glass Li2B4O7:Ag,Gd." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42610.

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Annealing in air and vacuum were obtained glass samples Li2B4O7:Ag,Gd with Ag NPs. Three methods: the half-width strip plasmon resonance, X-ray diffraction and Small-angle X-ray scattering, in these samples by size NPs Ag. Revealed that the size of NPs Ag, defined by half-widths plasmon resonance band much smaller than obtained by other methods. It is concluded that the methods of X-ray diffraction and small-angle X-ray scattering give results closer to reality than the method plasmon resonance.

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Pugliara, Alessandro. "Elaboration of nanocomposites based on Ag nanoparticles embedded in dielectrics for controlled bactericide properties." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30324/document.

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Les nanoparticules (NPs) d'Ag sont très utilisées dans le secteur de la santé, dans l'industrie alimentaire et dans les produits de consommation pour leurs propriétés antimicrobiennes. Le grand rapport surface sur volume des NPs d'Ag permet une augmentation importante du relargage d'Ag comparé au matériau massif et donc une toxicité accrue vis à vis des micro-organismes sensibles à cet élément. Ce travail de thèse présente une évaluation des propriétés antimicrobiennes de petites NPs d'Ag (<20 nm) enrobées dans des matrices de silice sur la photosynthèse d'algues vertes. Deux techniques d'é

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3

CALEFFI, MATTEO. "Deposizione di nanoparticelle core-shell di Ag@MgO e Au@MgO su TiO2 meso-poroso mediante sorgente di aggregazione di nanoparticelle: una strategia per migliorare l'efficienza di Celle Solari di Perovskite." Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2022. http://hdl.handle.net/11380/1271921.

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Attualmente, l'accoppiamento fra nanoparticelle metalliche (NP) e materiali foto-attivi rappresenta una via promettente per migliorare le efficienze di dispositivi in applicazioni di fotocatalisi ed energia solare. Nella maggior parte dei casi, il miglioramento dell'efficienza dei dispositivi solari mediante funzionalizzazione con NP core-shell è stato ottenuto attraverso metodi chimici sia per la sintesi che per la deposizione delle NP. Questi metodi sono limitati nella combinazione di materiali di core e shell, così come alcuni inconvenienti legati all'uso di solventi. D'altra parte, le sorg

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4

Fan, Yinan. "Rational synthesis of plasmonic/catalytic bimetallic nanocrystals for catalysis." Thesis, Sorbonne université, 2022. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2022SORUS189.pdf.

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Parmi les différents nanocatalyseurs, ceux constitués de nanoparticules de métaux nobles méritent une attention particulière en raison de leurs propriétés électroniques, chimiques et même optiques (dans le cas de transformations renforcées par les plasmons). Le platine ou le palladium sont bien connus pour leurs remarquables propriétés catalytiques, mais ils sont chers et leurs ressources sont limitées. En outre, les nanocatalyseurs monométallique ne peuvent conduire qu'à une gamme limitée de réactions chimiques. Ainsi, notre stratégie a été de développer des nanocatalyseurs bimétalliques comp

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5

Jouanin, Anthony. "Extraction de la lumière par des nanoparticules métalliques enterrées dans des films minces." Phd thesis, Palaiseau, Institut d'optique théorique et appliquée, 2014. http://pastel.archives-ouvertes.fr/pastel-01061272.

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L'essor des procédés de micro et nano-fabrications rend aujourd'hui accessible la synthèse contrôlée de nanoparticules métalliques (typiquement de 3 à 200nm) offrant de larges résonances d'absorption et de diffusion dont les fréquences peuvent être contrôlées finement en variant judicieusement leur géométrie et leur composition. Dans ce travail de thèse relevant de l'électrodynamique classique établit par Maxwell, nous étudions numériquement l'intérêt de ces particules pour la problématique du (dé)couplage de la lumière piégée dans un film mince diélectrique - une géométrie de référence permet

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6

Wood, Christopher. "Non-spherical plasmonic nanoparticles." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/48485.

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The field of nanotechnology has grown exponentially in recent years. As advancements are made in synthetic technology, this allows for their implementation into new research areas, industries, and potential applications. Nanoparticles are an extensively studied area in nanotechnology, with a plethora of constituent materials providing a vast array of potential properties. Plasmonic nanoparticles in particular have the ability to absorb light, leading to enhancements in many applications, for example surface enhanced Raman spectroscopy. Many plasmonic nanoparticle studies are focused on spheric

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Gross, Pierre-Alexandre. "Modification de nanotubes de TiO2 pour la production d’hydrogène par photodissociation de l’eau sous lumière solaire." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF053.

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Ce travail de thèse traite de la production d’hydrogène par le procédé de photoélectrocatalyse en utilisant une photoanode à base de nanotubes de TiO2 verticalement alignés. L’utilisation du TiO2 étant limité pour des applications solaires en raison de son large gap, il est nécessaire de le modifier. Deux approches sont proposées pour modifier les nanotubes de TiO2 et leur permettre d’absorber la lumière visible. La première est une modification chimique du TiO2 par co-dopage cationique-anionique (Ta-N) ou (Nb-N). Les cations sont insérés durant la croissance des nanotubes grâce à une approche

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8

Adleman, James R. Psaltis Demetri Psaltis Demetri. "Plasmonic nanoparticles for optofluidic applications /." Diss., Pasadena, Calif. : California Institute of Technology, 2009. http://resolver.caltech.edu/CaltechETD:etd-05102009-103332.

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9

Indrehus, Sunniva. "Plasmonic properties of supported nanoparticles." Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS136.pdf.

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Après quelques rappels d’électromagnétisme et sur la permittivité des métaux, le premier chapitre est dévolu à la présentation des nanoparticules en optique, et comment les modèles analytiques de polarisabilité permettent de prendre en compte la présence d’un substrat et de nanoparticules voisines. Les deux chapitres suivants reprend un certain nombre d’éléments de la théorie de Bedeaux-Vlieger sur la charge excédentaire et les susceptibilités de surface, et sa mise en œuvre pour les nanoparticules sur un substrat plan. Cette théorie, dont les bases ont été établies à la fin des années 70, a d

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Li, Zhaozhu. "Plasmonic Approaches and Photoemission: Ag-Based Photocathodes." W&M ScholarWorks, 2017. https://scholarworks.wm.edu/etd/1516639865.

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Photocathodes play an important role in present large accelerator facilities by providing polarized or un-polarized electron beams. Current state-of-art high polarization photocathodes consist of strained super-lattice GaAs based photocathodes, e.g. GaAs/GaAsP has a quantum efficiency ~1% and polarization ~90% at near-infrared wavelength for the incident light. Despite the advantages offered by metallic photocathodes regarding longer life time, fast response time and low requirements of ultra-high vacuum environment, they have not been put to use due to their low quantum efficiency, even thoug

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Steven, Christopher R. "Plasmonic metal nanoparticles : synthesis and applications." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27939.

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Plasmonic metal nanoparticles are widely exploited in academia and industry for use in various assay types. In collaboration with an industrial partner, BBI Solutions, the work here details investigations into the production and use of the plasmonic nanoparticles. The work was split into two themes. The first of these was flow chemistry of nanoparticles, covering a microfluidic assay platform and continuous colloid production. In chapter one, a novel microfluidic assay platform was developed which facilitated the transfer of multiple, sequential bench-top procedures into a single device. This

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12

MULTARI, CRISTINA. "Magneto-plasmonic nanoparticles for photothermal therapy." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2858359.

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13

Porcheron, Alexandre. "Plasmonic nanoparticles modified by coordination complexes." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS471.

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L’objectif de cette thèse était de construire de nouveaux nano-objets hybrides constitués d'une nanoparticule d'or sur laquelle serait greffé des complexes de coordination. Le but recherché avec une telle architecture était de promouvoir une synergie entre les propriétés plasmoniques des nanoparticules et les propriétés optiques ou électroniques des complexes métalliques. Un point clé de la construction a été l'utilisation de carbènes N-hétérocycliques (NHC) comme agents de stabilisation et plateforme d'ancrage sur les nanoparticules. Dans une première partie deux molécules hétéroditopiques, p

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14

Strandberg, Östman Felicia. "Optical Properties of Plasmonic Ag/Ni Square Nanostructures." Thesis, Uppsala universitet, Materialfysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256885.

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15

Russo, Valentina. "Plasmonic Au/Ag ordered nanoarrays for biosensing applications." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3425233.

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The aim of the present work is the study and the nanofabrication of innovative plasmonic nanostructured materials to develop label-free optical biosensors. The motivation arises from the need to identify specific biological molecules at very low concentrations (below the picoMolar level) and with high specificity. This goal is of paramount importance for instance in diagnostics and prognostics through the early-stage detection of markers in biological fluids indicating possible altered biological processes. At the same time a fast and simple detection scheme is required, without the use of l

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Kitenge, Denis. "Optical detection of CO and H2 based on surface plasmon resonance with Ag-YSZ, Au and Ag-Cu nanoparticle films." Scholar Commons, 2009. http://scholarcommons.usf.edu/etd/2047.

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Silver, gold, and copper metallic nanoparticle films have been utilized in various MEMS devices due to not only their electrical but also their optical properties. The focus of this research is to study the detection at room temperature of carbon monoxide (CO) and hydrogen (H2) via Surface Plasmon Resonance (SPR) phenomenon of silver-embedded Yttrium Stabilized Zirconium (Ag-YSZ) nanocomposite film, gold (Au) nanoparticle film, and an alloy film of silver-copper (Ag-Cu) , grown by the Pulsed Laser Deposition (PLD). To determine the appropriate film materials for quick and accurate CO and H2 de

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Kitenge, Denis. "Optical detection of CO and H₂ based on surface plasmon resonance with Ag-YSZ, Au and Ag-Cu nanoparticle films." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003296.

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18

Fairbairn, Natasha. "Imaging of plasmonic nanoparticles for biomedical applications." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/353976/.

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Plasmonic nanoparticles show potential for numerous different biomedical applications, including diagnostic applications such as targeted labelling and therapeutic applications such as drug delivery and therapeutic hyperthermia. In order to support the development of these applications, imaging techniques are required for imaging and characterising nanoparticles both in isolation and in the cellular environment. The work presented in this thesis relates to the use and development of two different optical techniques for imaging and measuring the localised surface plasmon resonance of plasmonic

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19

Otomalo, Tadele. "Ultrafast optical response of complex plasmonic nanoparticles." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC102.

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Les propriétés remarquables associées à la résonance plasmon localisée (LSPR) dans les nanoparticules (NP) de métaux nobles font de la plasmonique un sujet aux applications multiples. Lorsque les NP sont éclairées par des impulsions laser ultracourtes, une dynamique rapide d'échanges d'énergie conduit à la variation ultrarapide de leurs propriétés optiques, accompagnée d’autres effets comme la photoluminescence, l’échauffement hyperlocalisé, la photoémission électronique, la production de radicaux libres, la nano-cavitation. La conception de nanostructures hybrides complexes permet d'adapter l

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20

Cheng, Ka Ying. "Nano-metals plasmonic coupling." HKBU Institutional Repository, 2020. https://repository.hkbu.edu.hk/etd_oa/747.

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In this work, we investigated nano-metal plasmonic coupling between dissimilar metals. We measured the optical transmission of nano-Ag coupled to other nano-metals using glass and Si substrates respectively. The reflected colors shifted from yellow to violet were obtained through the plasmonic coupling with nearest-neighbor nano-metals such as aluminum, magnesium, and ytterbium nano-metals. They were deposited randomly next to the nano-Ag. The metal size is from 8 to 15 nanometers. The results show that the colors changing is essentially due to plasmonic coupling between nano-Ag and another th

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21

Rosman, Christina [Verfasser]. "Biological applications of plasmonic metal nanoparticles / Christina Rosman." Mainz : Universitätsbibliothek Mainz, 2015. http://d-nb.info/1076882633/34.

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22

Dienerowitz, Maria. "Plasmonic effects upon optical trapping of metal nanoparticles." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1634.

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Optical trapping of metal nanoparticles investigates phenomena at the interface of plasmonics and optical micromanipulation. This thesis combines ideas of optical properties of metals originating from solid state physics with force mechanism resulting from optical trapping. We explore the influence of the particle plasmon resonance of gold and silver nanospheres on their trapping properties. We aspire to predict the force mechanisms of resonant metal particles with sizes in the Mie regime, beyond the Rayleigh limit. Optical trapping of metal nanoparticles is still considered difficult, yet it

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23

Zhang, Li. "FDTD Algorithm for Plasmonic Nanoparticles with Spatial Dispersion." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452174003.

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24

Rouxel, Romain. "Ultrafast thermo-optical dynamics of single plasmonic nanoparticles." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSE1306.

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Les changements de propriétés dynamiques de nanodisques d'or individuels supportés sur un substrat de saphir ont été étudiés sur des échelles de temps allant de la femtoseconde à la nanoseconde par la combinaison des techniques de spectroscopie par modulation spatiale et de spectroscopie optique résolue en temps. Les nanodisques sont mis hors-équilibre par l’absorption d’une impulsion optique de pompe, et leur relaxation est sondée optiquement par la mesure de la transmission d’une seconde impulsion. Dans la première partie de ce travail, la dynamique du transfert de chaleur du nano-objet au s

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Abkhalimov, E. V., R. D. Solovov, and B. G. Ershov. "Composite Ag-Pt Nanoparticles in Aqueous Solution." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35033.

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It is shown that the saturation of an aqueous solution containing K2PtCl4 with hydrogen in the presence of 6.3 nm silver nanoparticles leads to the reduction of platinum on the silver surface and the formation of Ag/Pt core-shell nanoparticles. The Ag:Pt molar ratio is varied from 9:1 to 1:9 for synthesizing Pt shell layer of different thickness. An apparent shift of Ag surface plasmon band from 405 nm to 230 nm and broadening of one with decrease of Ag:Pt ratio was observed. The TEM images and SAED pattern of Pt@Ag nanoparticles has been obtained. The UV-Vis and TEM data confirms a form

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Auer, Mathias. "Preferentially Orienting Ag Nanoparticles Using CaF2 Nanorods." VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/2730.

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A study was done to examine the effect of surface orientation as well as heterogeneous epitaxy at an interface between two materials with a large lattice mismatch. Silver nanoparticles of different diameters were grown in an effort to study methods of preferentially orienting the geometry of metal nanoparticles. Arrays of calcium fluoride nanorods were grown on silicon substrates using oblique angle thermal vapor deposition. The chamber operated at an ultra high vacuum pressure of 10^-10 Torr during the deposition of the rods and an oblique angle of 75° was kept between the silicon substrate n

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Dahal, Naween. "Synthesis and characterizations of novel magnetic and plasmonic nanoparticles." Diss., Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/4269.

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28

Prasad, Janak [Verfasser]. "Sensing applications of biofunctionalised plasmonic gold nanoparticles / Janak Prasad." Mainz : Universitätsbibliothek Mainz, 2015. http://d-nb.info/1070108898/34.

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29

Beliatis, Michail. "Laser fabrication of plasmonic metal nanoparticles for optoelectronic devices." Thesis, University of Surrey, 2011. http://epubs.surrey.ac.uk/761383/.

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Metal nanoparticles (MNP) are widely researched for the fabrication of novel low cost and more energy efficient optoelectronic devices. MNPs, which exhibit surface plasmon resonance (SPR), can be incorporated into thin film photovoltaic structures and as well as into substrates for enhancing the Raman spectroscopy performance. Recent demonstration of devices with plasmonic structures has limited utility due to the need for techniques of ordered MNPs for large area fabrication that are not currently available. This work examines the suitability of laser annealing for the fabrication of metal na

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Zhang, Xingguang. "Plasmonic photocatalysts of supported gold nanoparticles for organic conversions." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/67714/4/Xingguang_Zhang_Thesis.pdf.

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This thesis is a comprehensive study of plasmonic gold photocatalysts for organic conversions. It presents the advantages of plasmonic gold photocatalysts in the selective oxidation, reduction, and acetalisation. It is discovered that plasmonic gold photocatalysts exhibit better catalytic performance (higher selectivity or activity) in these organic conversions. The study in this thesis highlights the capacity of plasmonic gold photocatalysts in harvesting solar energy for converting organic raw materials to value-added chemicals, and the great potential of gold photocatalysts in chemical prod

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Yen, Chun-Wan. "Plasmonic photochemistry on the nanoscale." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41085.

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When nanoparticles are small in size compared to the wavelength of incident light, a localized surface plasmon resonance occurs. For certain noble metals, such as gold and silver, this frequency occurs in the visible or near IR range, and therefore it can be utilized for many important applications. Only silver and gold nanoparticles were utilized in this thesis work, and they were used in application for three separate files: environment, catalysis, and energy.

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Rafiei, Miandashti Ali. "Synthesis, Characterization, and Photothermal Study of Plasmonic Nanostructures using Luminescence Nanomaterials." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1553788360252461.

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Dias, Jorge Maião Peres Teixeira. "Noble metal nanoparticles - Au and Ag - for biodetection." Master's thesis, Faculdade de Ciências e Tecnologia, 2008. http://hdl.handle.net/10362/3935.

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Dissertation submitted for obtainment of the Master’s Degree in Biotechnology, by the Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia<br>Metal nanoparticles possess unique optical, chemical and magnetic properties due to their size, shape and composition. Taking advantage of these properties, new biosensors have been developed using, mainly, gold nanoparticles. Silver nanoparticles, due to its enhanced surface plasmon resonance extinction coefficient are alternate candidates as labels to biodetection. However, unlike gold nanoparticles, silver nanoparticle derivatization with t

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Burrows, Christopher P. "Plasmonic resonances of metallic nanoparticles in arrays and in isolation." Thesis, University of Exeter, 2010. http://hdl.handle.net/10036/3069.

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Plasmonics is the branch of photonics that is concerned with the interactions which take place between metallic structures and incident electromagnetic radiation. It is a field which has seen a recent resurgence of interest, predominantly due to the emerging fields of metamaterials and sub-wavelength optics. The original work contained within this thesis is concerned with the plasmonic resonances of metallic nanoparticles which can be excited with visible light. These structures have been placed in a variety of configurations, and the optical response of each of these configurations has been p

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Damato, Ralph. "Polarization control of plasmonic modes in single nanoparticles and nanostructures." Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1527542.

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<p> This thesis investigates the fundamental nanoscale near-field light matter interaction between a probe tip and plasmonic antenna nanostructures. The thesis is focused on polarization control of metallic plasmon modes using scattering-type scanning near-field optical microscopy (s-SNOM). Part of the thesis is dedicated to spectroscopic near-field comparison of coated and bare single plasmonic particles in the infrared wavelength range (λ= 9–11 µm) using s-SNOM. By tuning the wavelength of the incident light, we have acquired information on the spectral polarization depend

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Austin, Lauren Anne. "Exploring some aspects of cancer cell biology with plasmonic nanoparticles." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54236.

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Plasmonic nanoparticles, specifically gold and silver nanoparticles, exhibit unique optical, physical, and chemical properties that are exploited in many biomedical applications. Due to their nanometer size, facile surface functionalization and enhanced optical performance, gold and silver nanoparticles can be used to investigate cellular biology. The work herein highlights a new methodology that has exploited these remarkable properties in order to probe various aspect of cancer cell biology, such as cell cycle progression, drug delivery, and cell death. Cell death mechanisms due to locali

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Rondon, B. Rebeca A. "Gold Nanoparticles Plasmonic Enhancement for Decoding Of Molecule-Surface Interactions." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37950.

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In this research, the use of gold nanostructures (AuNS) was explored to evaluate the interaction between molecules and the nanoparticle (NP) surface. In that way, three different projects were developed; one project using fluorescence and two projects using Raman spectroscopy as measuring technique. The fluorescence spectroscopy project used the fluorescence lifetime imaging microscope (FLIM) to evaluate the relative position of the molecules methylene blue (MB) and cucurbit[7]uril (CB) on the gold nanoparticle (AuNP) surface. Although the inclusion complex is favored in solution, it was fou

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Liu, Junjun. "Optical properties of chiral plasmonic nanoparticles and mesoporous silicon nanowires." HKBU Institutional Repository, 2017. https://repository.hkbu.edu.hk/etd_oa/385.

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Structural engineering plays an essential role in controlling the optical properties of nanostructures, which are of fundamental and practical interest in nanoscience and technology. In this study, two kinds of nanostructural engineering were investigated systematically to enrich nano-optics research: structural helicity was imposed on plasmonic nanoparticles (NPs) with chiroptical activity engineerable in the ultraviolet (UV)-visible region, and porosification was imposed on silicon nanowires (SiNWs) to tune optical interaction and photoluminescence (PL).. The generation of helical metamateri

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Sediq, Khalid. "The optical properties of photonic-crystal nanocavities containing plasmonic nanoparticles." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12324/.

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Ott, Andreas. "Synthesis and application of hybrid materials based on plasmonic nanoparticles." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17511.

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Hybride Nanostrukturen verbinden die Vorzüge von individuellen Materialien, die neue Eigenschaften hervorrufen können. In dieser Arbeit wurden verschiedene Metal Nanostrukturen synthetisiert und deren optische Eigenschaften analysiert. Die Herstellung eines Spasers oder Lichteinfang in Solarzellen wurde untersucht. Der Einfluß von Größe, Form und Brechungsindex auf die Metal-Plasmonen wurde erforscht. Die gewonnen Erkenntnisse genutzt um Metal Nanopartikel mit gezielten Eigenschaften herzustellen. Hybride Gold Nanostrukturen (funktionalisiert mit Farbstoffen oder Quantenpunkten) wurden herges

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Pathak, Nilesh Kumar. "Study of plasmonic properties of metal nanoparticles and its applications." Thesis, IIT Delhi, 2016. http://localhost:8080/xmlui/handle/12345678/7040.

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Zhang, Lu. "Design of plasmonic nanoparticles and their use for biotoxin immunosensing." Electronic Thesis or Diss., Sorbonne université, 2018. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2018SORUS439.pdf.

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L'entérotoxine A du staphylocoque (SEA) produite par certaines souches de Staphylococcus aureus est une cause majeure d'intoxication alimentaire et représente la deuxième cause de maladies d'origine alimentaire en France. Les nanoparticules (NPs) plasmoniques aux propriétés optiques uniques sont largement utilisées comme transducteurs dans les biocapteurs en raison du phénomène de résonance de plasmons de surface localisée (LSPR). L'objectif de ce travail était de développer des biocapteurs basés sur des NPs plasmoniques à partir desquels la détection de SEA pourrait être réalisée par lecture

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Ba, Sowid Salem Saleh Salem. "Mesoionic carbenes, innovative ligands for the stabilization of plasmonic nanoparticles." Electronic Thesis or Diss., Sorbonne université, 2025. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2025SORUS045.pdf.

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Les nanoparticules d'or (AuNPs) suscitent un vif intérêt en raison de leurs propriétés optiques et électroniques uniques, leur permettant d'être utilisées dans des applications en catalyse, biomédecine, détection et électronique. Cependant, leur utilisation pratique est souvent limitée par la stabilité des ligands de surface. Si les thiols ont longtemps été les ligands privilégiés, leur faible robustesse dans des conditions extrêmes a conduit à l'exploration de stabilisants plus résistants. Les carbènes N-hétérocycliques (NHCs) se sont imposés comme des alternatives prometteuses grâce à leur c

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Choe, Sean. "Plasmonic mechanochromic microcapsules." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS296.

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Des émulsions de Pickering huile-dans-eau (o/w) stabilisées par des nanoparticules d’or (AuNP) ont été synthétisées soit par ultrasonication soit par flow-focusing dans des puces de polydiméthylsiloxane (PDMS). Ces émulsions sont à la base d’une microcapsule (MC) mécanochrome avec les AuNP à leur surface. Des stimuli extérieurs tels que la contrainte mécanique ou pH induisent un changement conformationnel des MC et donc un changement de la résonance plasmonique des AuNP. Dans cette thèse, la synthèse des AuNP est décrite et les AuNP sont caractérisées. Les MC sont faites avec des conditions de

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Peiris, Gallage Sunari. "Pd and Pd based alloy nanoparticles as visible light photocatalysts for coupling reactions under ambient conditions." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/113715/1/Gallage%20Sunari_Peiris_Thesis.pdf.

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This PhD thesis presents an investigation on the development of novel metal nanoparticle (NP) photocatalysts including non-plasmonic NPs and their alloy NPs for several important organic synthesis reactions. This study has provided solid information and advances in new materials design, synthesis and application for photocatalysis. The findings of this study demonstrate the use of visible light or sunlight to drive chemical reactions, which is an important aspect in the view of a sustainable and green chemistry.

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Wang, Jiyong. "Plasmonic Nanoantennas." Thesis, Troyes, 2017. http://www.theses.fr/2017TROY0021.

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Les réponses optiques linéaires et non linéaires de nanoparticules (NPs) plasmoniques fabriquées lithographiquement sont étudiées. La diffusion élastique donne une empreinte digitale des plasmons de surface des NPs, ces derniers exaltant les signaux optiques non linéaires. La dépendance en polarisation de la génération de seconde harmonique (SHG) montre un effet de basculement, qui est analysé à partir des décalages spectraux entre l’excitation et les resonances et des effets d'interférence de SHG. En régime de faible excitation, en plus d'un processus de recombinaison de paires électron-trou

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Chen, Xi. "Photothermal Effect in Plasmonic Nanostructures and its Applications." Doctoral thesis, KTH, Optik och Fotonik, OFO, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143754.

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Plasmonic resonances are characterized by enhanced optical near field and subwavelength power confinement. Light is not only scattered but also simultaneously absorbed in the metal nanostructures. With proper structural design, plasmonic-enhanced light absorption can generate nanoscopically confined heat power in metallic nanostructures, which can even be temporally modulated by varying the pump light. These intrinsic characters of plasmonic nanostructures are investigated in depth in this thesis for a range of materials and nanophotonic applications. The theoretical basis for the phototherm

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Seirafianpour, Nader. "Study of nanoparticles of SnO2 on Au and nanoparticles of TiO2 on Ag for plasmonic applications." Thesis, 2007. http://spectrum.library.concordia.ca/975528/1/MR34776.pdf.

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Nanolayered systems composed of a gold film coated by a granular tin dioxide layer, and a silver film coated by a granular layer of titanium dioxide are fabricated by combined sputtering/sol-gel methods. The conditions of the sol-gel synthesis and the substrate materials were adjusted with a particular attention to the aggregation effects, especially in the case of the gold/tin dioxide system. The dielectric particles are uniformly distributed on the metal surfaces and the films are smooth (mean roughness less than 6 nm). The components of the nanolayered systems prepared in this work are foun

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Cheng, Chun-Chin, and 鄭鈞智. "Plasmonic Properties of Two-Dimensional Au/Ag Core-Shell Nanoparticle Superlattices." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/14626032296668285280.

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Huang, Jheng-Long, and 黃正隆. "Plasmonics and Photocatalysis of Sputtered Ag Nanoparticles Impregnated in N-TiO2 Thin Films." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7wa4g7.

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碩士<br>國立東華大學<br>材料科學與工程學系<br>106<br>In this study, reactive magnetron sputtering was used to prepare different nitrogen doped titanium dioxide film (N-TiO2), which was combined with silicon dioxide layers and Ag nanoparticles (Ag NPs) to form a sandwich multilayer structure. The surface plasmon effect of Ag NPs could enhance the absorption of visible light of the film, and might improve the photocatalytic properties of titanium dioxide. The structure and crystallinity of the films were analyzed by XRD. The elemental composition and bonding of the films were examined by XPS. UV-vis spectrotomet

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