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Dissertations / Theses on the topic 'Gold colloid'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 April 2022

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1

Sakampally, Vara Prasad Reddy. "Increased Control over Gold Colloid Adsorption on Substrates for Colloid Displacement Lithography." TopSCHOLAR®, 2009. http://digitalcommons.wku.edu/theses/109.

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Colloid displacement lithography is proving to be very effective in the designing of nanometer scale electronic devices. Precise control of the structure of matter at the nanometer scale has brought a revolutionary change in science and technology. The use of these nanometer scale devices ranges from the diagnosis of various diseases to cell repair to ultra strong materials. This research focused on optimizing the conditions for gold colloid particle adsorption for colloid displacement lithography, an expansion on gold colloid particle manipulation techniques using a scanned probe microscope.

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2

Collins, Ian R. "The colloid stability of gold particles dispersed on solid surfaces." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292530.

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3

Keryou, K. M. "Skeletal reactions of hydrocarbons over supported sol-derived metallic particles of platinum and platinum-gold bimetallics." Thesis, Brunel University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234111.

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4

Xia, Zhenbo. "Surface Forces in Thin Liquid Films of H-Bonding Liquids Confined between Hydrophobic Surfaces." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/64255.

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Hydrophobic interaction plays an important role in biology, daily lives, and a variety of industrial processes such as flotation. While the mechanisms of hydrophobic interactions at molecular scale, as in self-assembly and micellization, is relatively well understood, the mechanisms of macroscopic hydrophobic interactions have been controversial. It is, therefore, the objective of the present work to study the mechanisms of interactions between macroscopic hydrophobic surfaces in H-bonding liquids, including water, ethanol, and water-ethanol mixtures. The first part of the present study involv

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5

Dreaden, Erik Christopher. "Chemistry, photophysics, and biomedical applications of gold nanotechnologies." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/51320.

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Gold nanoparticles exhibit a combination of physical, chemical, optical, and electronic properties unique from all other nanotechnologies. These structures can provide a highly multifunctional platform with which to diagnose and treat diseases and can dramatically enhance a variety of photonic and electronic processes and devices. The work herein highlights some newly emerging applications of these phenomena as they relate to the targeted diagnosis and treatment of cancer, improved charge carrier generation in photovoltaic device materials, and strategies for enhanced spectrochemical analysis

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6

Valkovičová, Jiřina. "Syntéza koloidních zlatých nanotyčinek pro biomedicínské aplikace." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-221142.

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Diplomová práce se zabývá výrobou a využitím zlatých koloidních nanotyčinek v biomedicínských aplikacích. Konkrétně se zaměřuje na tři základní funkce nanočástic v analýze - transportní, separační a především zobrazovací. V části o využití nanočástic pro zobrazování je hlavní zájem věnován zejména povrchové plazmonové rezonanci zlatých nantyčinek. Dále je práce zaměřena na využití nanotyčinek pro termální terapii. Následující část je věnována vhodným modifikacím povrchu, hlavně za účelem zmírnění toxicity částic. Závěrem teoretické části jsou způsoby přípravy zlatých koloidních nanotyčinek a t

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7

Weber, Alfredo dos Santos. "Síntese de nanopartículas de ouro por precipitação." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/4098.

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Made available in DSpace on 2016-06-02T19:56:47Z (GMT). No. of bitstreams: 1 4532.pdf: 2259223 bytes, checksum: 927ad22b01aa4c0e8c6d03508ad75975 (MD5) Previous issue date: 2012-04-26<br>Universidade Federal de Sao Carlos<br>Gold nanoparticles have properties with great interest in applications in biomedicine, catalysis, optics and electronics. This study seeks to produce stable, size-homogeneous and well-dispersed particles. The chosen method is the reduction of metallic ions by organic salts in aqueous medium. The organic compounds act as stabilizers and their interactions with the metallic

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8

Luo, Jingjie. "Formation de nanoparticules d'or supportées sur silice Stöber : mécanismes et applications." Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-01038161.

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Dans ce travail, les nanoparticles d'or supportées ont été étudiées en raison de leur fort potentiel dans les domaines de la catalyse. Des sphères de silice obtenues par la voie Stöber ont été synthétisées et utilisées comme supports des nanoparticules d'or. Les précurseurs d'or sont des solutions colloïdales possédant des nanoparticules d'or homogènes et de petite taille (environ 3 nm). Les matériaux préparés avec ou sans addition d'un nouvel élément ont été utilisés dans les réactions de l'oxydation du CO et une réaction inédite pour l'or: l'oxydation sélective de l'H2S.Les résultats indique

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9

Ramakrishnan, Ramaa N. "Surface enhanced Raman spectroscopic studies of the orientation of organonitriles on metal colloids." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1583.

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Thesis (M.S.)--West Virginia University, 2000.<br>Title from document title page. Document formatted into pages; contains xi, 81 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.

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10

com, seanzhang06@hotmail, and Xin-min Zhang. "The dissolution of gold colloids in aqueous thiosulfate solutions." Murdoch University, 2008. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20090807.121135.

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The kinetics of the dissolution of gold and silver colloids in ammoniacal thiosulfate solutions has been studied using oxygen, copper(II) or oxygenated copper(II) as oxidants at pH 9 - 11 and temperature 22oC to 48oC. The effects of the concentration of the main reagents such as copper(II), ammonia and thiosulfate as well as various background reagents have been investigated. Gold and silver colloids have characteristic absorption peaks at 530 nm and 620 nm respectively. Thus, the extent of gold or silver dissolution in different lixiviant systems was monitored using an ultraviolet-visible spe

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11

Zhang, Xin-min. "The dissolution of gold colloids in aqueous thiosulfate solutions." Zhang, Xin-min (2008) The dissolution of gold colloids in aqueous thiosulfate solutions. PhD thesis, Murdoch University, 2008. http://researchrepository.murdoch.edu.au/672/.

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The kinetics of the dissolution of gold and silver colloids in ammoniacal thiosulfate solutions has been studied using oxygen, copper(II) or oxygenated copper(II) as oxidants at pH 9 - 11 and temperature 22oC to 48oC. The effects of the concentration of the main reagents such as copper(II), ammonia and thiosulfate as well as various background reagents have been investigated. Gold and silver colloids have characteristic absorption peaks at 530 nm and 620 nm respectively. Thus, the extent of gold or silver dissolution in different lixiviant systems was monitored using an ultraviolet-visible spe

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12

Zhang, Xin-Min. "The dissolution of gold colloids in aqueous thiosulfate solutions /." Murdoch University Digital Theses Program, 2008. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20090807.121135.

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13

Emilsson, Samuel. "Colloidal self-assembly of anisotropic gold nanoparticles." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279095.

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The colloidal self-assembly of plasmonic gold nanoparticles (AuNPs) is of interest to utilize the plasmonic coupling effects that arise between nanoparticles. The enhanced properties of anisotropic AuNPs make them particularly attractive in self-assemblies. Herein, a literature study into the different strategies used to obtain self-assemblies of AuNPs using molecular linkers is presented. The use of nanospheres (AuNS) and nanorods (AuNRs) were mainly reviewed. Thereafter, two different nanobipyramids (AuBPs) were investigated for use in self-assemblies. The concentration of cetyltrimethylammo

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14

Hamill, Conor Daniel. "Applications of colloidal gold and palladium nano-catalysts." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675922.

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Colloidal synthesis can be used to functionally design the morphology of nanoparticles for specific applications. A sol-immobilisation technique has been successfully employed to synthesize bi-metallic gold and palladium nano-catalysts. The ability of a gold and palladium bimetallic catalyst to selectively oxidise toluene has been used to enhance the hydrocarbon selective catalytic reduction (HC-SCR) of NOx. The influence of reactor configuration on performance is also evaluated and an alternative HC-SCR system design is presented. The capacity of gold and palladium nano-catalysts to produce b

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15

Sapsford, Kim Elizabeth. "The development of optical biosensors for nitrogen oxyanions using metalloproteins." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327497.

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16

Fiebrig, Immo. "Solution studies on the mucoadhesive potential of various polymers for use in gastrointestinal drug delivery systems." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307747.

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17

Dorris, Annie. "Preparation and characterization of polyelectrolyte-coated nanoparticles." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115712.

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Polyelectrolytes coated on high surface curvature nanoparticles (NPs) have been prepared and characterized by a variety of solid-state nuclear magnetic resonance (NMR) experiments in order to examine surface interactions, polymer-water association and polymer dynamic properties of layer components. Gold nanoparticles of four nanometers in diameter pre-stabilized by 4-dimethylaminopyridine (DMAP), and silica and neodymium NPs were chosen as substrates for these studies. The high surface to volume ratio provided by such nanoparticles is advantageous for NMR analysis, which requires a high materi

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18

Kassam, Adil. "Place exchange reactions of gold nanoparticles." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115918.

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The kinetics and mechanism of the place exchange reaction(PER) of alkylthiols with alkylthiol-protected gold nanoparticles(AuNP) are investigated. Using chemically similar alkylthiols it was possible to study the reaction in the absence of perturbing factors, enabling detailed mechanistic and kinetic studies to be explored. It is found that the reactions are zero order in incoming ligand and overall follow a second order diffusion limited Langmuir rate law. In the case where there is little chemical distinction between the incoming and capping ligands, the reactions proceed to an endpoint cons

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19

Uppal, M. A. "Revisiting the Turkevich synthesis and established new routes to colloidal gold & gold-silver nanoparticles." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1464113/.

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The use of gold and silver nanoparticles has experienced a renaissance over the last 10 years and their number of uses in a variety of commercial products has dramatically increased. The first chapter of this thesis addresses the current and future uses of gold and silver nanoparticles, the methods employed in synthesising them and the theory behind their fascinating surface plasmon resonance properties. For the remainder of this thesis we will revisit one of the most common methods for growing gold nanoparticles, the Turkevich method, and then experimentally modify this method as our basis fo

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20

Lee, Kate Y. J. "Colloidal gold nanoparticles for cancer therapy: effects of particle size on treatment efficacy, toxicology, and biodistribution." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/43640.

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Gold nanoparticle has emerged as an attractive platform for drug delivery applications by complementing the existing drug delivery carriers. Currently, only a few gold nanoparticle-based anticancer drug delivery systems have been reported, compared to the polymer-based delivery systems. Additionally, there is still a lack of understanding for the behavior and fate of the gold-drug conjugate in the body that further attention is required. The overall goal of this thesis is to investigate the in vivo behavior of colloidal gold nanoparticle and its therapeutic efficacy in an animal model, especia

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21

Craig, Gary A. "Gold Nanoconjugates for Detection of Malignant Tissue in Human Pancreatic Specimens." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/CraigGA2008.pdf.

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22

Yan, Hao. "Solubility phase transition behavior of gold nanoparticles in colloidal solution." Diss., Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2336.

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23

Wu, Kevin Su-Wei. "Preparation of Stable Gold Colloids for Sensitivity Enhancement of Progesterone Immunoassay using Surface Plasmon Resonance." The University of Waikato, 2007. http://hdl.handle.net/10289/2279.

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The purpose of this study was to prepare concentrated and stable gold colloids for the enhancement of the signal response of the SPR technique for detecting small molecules such as progesterone. The gold colloids developed in this study were prepared by hydrazine hydrate, sodium borohydride, and tri-potassium citrate reduction routes. The study revealed that the sodium borohydride reduced gold colloids were extremely stable and it was able to be utilised in the progesterone immunoassay developed previously by Mitchell et al. The experiment was carried out on BIAcore 3000 using two different se

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24

Zayed, Gamal. "Development of colloids for cell and tissue targeting : bisphosphonate-functionalized gold nanoparticles for the investigation of bone targeting." kostenfrei, 2009. http://www.opus-bayern.de/uni-regensburg/volltexte/2010/1167/.

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25

Supriya, Lakshmi. "Assembly of Conductive Colloidal Gold Electrodes on Flexible Polymeric Substrates using Solution-Based Methods." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29356.

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This work describes the techniques of assembling colloidal gold on flexible polymeric substrates from solution. The process takes advantage of the strong affinity of gold to thiol and amino groups. Polymeric substrates were modified with silanes having these functional groups prior to Au attachment or in the case of poly(urethane urea) (PUU), no surface functionalization was required. This polymer has terminal amine and N-H groups on the polymer chain, which can act as coordination points for gold. Immersion in the colloidal gold solution led to the formation of a monolayer. Increased coverage

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26

Siddiqi, Arsalan K. "Development of tissue-equivalent heat-sensitive gel for the experimental verification of near infrared (NIR) laser-mediated cancer detection and therapy." Thesis, Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/34853.

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A few computational models currently exist to predict heat production and dissipation in tissue when a tumor containing optically-tunable gold nanoparticles such as nanoshells or nanorods is illuminated with near infrared (NIR) laser. The validity of any computational model still needs to be established by experiments before its wide use for various future clinical applications. One of the possible ways to validate the model is through the heat measurements within a phantom made with tissue-equivalent heat-sensitive gel. Currently, there are a few recipes available for this type of gel and th

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27

Pendery, Joel S. "Nanoscale Patterning and Imaging of Liquid Crystals and Colloids at Surfaces." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396623443.

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28

Khan, Siddique J. "Brownian dynamics study of the self-assembly of ligated gold nanoparticles and other colloidal systems." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13508.

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Doctor of Philosophy<br>Department of Physics<br>Amit Chakrabarti<br>We carry out Brownian Dynamics Simulations to study the self-assembly of ligated gold nanoparticles for various ligand chain lengths. First, we develop a phenomenological model for an effective nanoparticle-nanoparticle pair potential by treating the ligands as flexible polymer chains. Besides van der Waals interactions, we incorporate both the free energy of mixing and elastic contributions from compression of the ligands in our effective pair potentials. The separation of the nanoparticles at the potential minimum compares

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29

Datta, Sayak. "Synthesis of gold nano-particles in a microfluidic platform for water quality monitoring applications." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3189.

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30

Musoke, Michael. "Direct measurement of polymer interaction forces in good and poor solvents by using a modified atomic force microscope (AFM)." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391121.

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31

Kaufmann, Sabine. "Herstellung mesoskopischer Ringe und Stäbchen aus Gold." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-100603.

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Gegenstand der vorliegenden Arbeit ist die templatgestützte Erzeugung metallischer Stäbchen und Ringstrukturen im Mikrometer- und Nanometerbereich. Derartige Strukturen besitzen vor allem aufgrund ihres außergewöhnlichen Verhaltes gegenüber elektromagnetischen Wellen ein hohes Potential für optische, elektronische, magnetische oder sensorische Anwendungen. Zunächst wird das Vorgehen zur Herstellung mesoskopischer Ringe durch die Infiltration von Kolloidkristallen aus Siliziumdioxid mittels geeigneter Präkursorlösungen detailliert betrachtet. Daraufhin werden Ansätze zur Optimierung einzelner

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32

Peterson, Alisha. "Understanding the Role of Colloidal Particles in Electroporation Mediated Delivery." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5823.

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Electroporation (EP) is a physical non-viral technique used to deliver therapeutic molecules across the cell membrane. During electroporation an external electric field is applied across a cell membrane and it causes pores to form. These pores then allow the surrounding media containing the therapeutics to diffuse across the membrane. This technique has been specifically studied as a promising gene and drug delivery system. Colloidal particles have also proven to be promising for a variety of biological applications including molecular delivery, imaging, and tumor ablation, due to their large

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33

Sharma, Vivek. "Colloidal gold nanorods, iridescent beetles and breath figure templated assembly of ordered array of pores in polymer films." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/37168.

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Water drops that nucleate and grow over an evaporating polymer solution exposed to a current of moist air remain noncoalescent and self-assemble into close packed arrays. The hexagonally close packed, nearly monodisperse drops, eventually evaporate away, leaving a polymer film, with ordered array of pores. Meanwhile, typical breath figures or dew that form when moist air contacts cold surfaces involve coalescence-assisted growth of highly polydisperse, disordered array of water drops. This dissertation provides the first quantitative attempt aimed at the elucidation of the mechanism of the br

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34

Wu, Cheng. "Hybrid colloidal molecules from self-assembly of viral rod-like particles." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0133.

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Dans cette thèse, l’auto-assemblage en molécules colloïdales de virus en forme de filament, les bactériophages M13, est étudié. Comme première approche, l’affinité de la streptavidine pour la biotine ou un Strep-tag est utilisée et quantitativement comparée. Pour ce faire, des virus modifiés génétiquement, M13-AS, présentant des Strep-tag et des virus M13C7C chimiquement bioconjugués par de la biotine ont réagi via leur extrémité proximale avec des nanoparticules fonctionnalisées par de la streptavidine. Il en résulte la formation de molécules colloïdales en étoile, dont la valence ou nombre d

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35

Wemmer, Susan. "Expression and engineering of recombinant antibodies against a heat-shock protein of Mycobacterium bovis." Diss., University of Pretoria, 2008. http://hdl.handle.net/2263/28886.

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In the medical and veterinary diagnostic fields there is an ongoing need for stable and specific antibodies. There is also a requirement for simple, robust and cost-effective diagnostic assays to be used in the developing world. Recombinant antibodies from phage displayed libraries are economical to produce and can often be engineered to improve affinity, avidity and stability. While recombinant antibody fragments are useful in immunoassays, they are not strictly comparable to normal immunoglobulins and may under-perform in certain assays. Converting monovalent single-chain antibody fragments

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Giband, Marc. "Expression et localisation de trois genes du virus de la mosaique du chou-fleur (camv)." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13113.

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Etude par microscopie electronique de l'aspect cytologique des inclusions cytoplasmiques (viroplasmes) induites chez la plante hote apres inoculation de differentes souches et de clones recombinants du virus. Mise au point d'une technique de marquage a l'or colloidal sur coupes fines permettant de localiser le produit de l'expression du gene 3

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Abbas, Khan Zaheer [Verfasser]. "Fabrication and characterisation of multilayer thin film using self assembly of colloidal gold and silica nanoparticles / Zaheer Abbas Khan." München : GRIN Verlag, 2016. http://d-nb.info/1180622979/34.

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Abtahi, Seyyed Mohammad Hossein. "Implications of Shape Factors on Fate, Uptake, and Nanotoxicity of Gold Nanomaterials." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/83804.

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Noble metal nanoparticles such as gold and silver are of interest because of the unique electro-optical properties (e.g., localized surface plasmon resonance [LSPR]) that originate from the collective behavior of their surface electrons. These nanoparticles are commonly developed and used for biomedical and industrial application. A recent report has predicted that the global market for gold nanoparticles will be over 12.7 tons by year 2020. However, these surface-functionalized nanoparticles can be potential environmental persistent contaminants post-use due to their high colloidal stability

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Tyrrell, Christina Holly. "A Lateral Flow Smart Phone Image Analysis Diagnostic." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1083.

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A low cost compact diagnostic has many implications in today’s society. Smart phone technology has exponentially grown and with it the imaging capabilities associated with smart phones. The goals of this research are i) to determine the feasibility of combining in the field smart phone images with color dependent assay results, ii) to develop a MatLab® image analysis code to analyze these results, and iii) compare limits of detection between the un-aided eye and MatLab® image analysis software. Orange G dye is used to create a stock solution and subsequent titers for analysis. Autocad is used

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Beamer, Diane Krupp. "MINIMALLY INVASIVE OPTICAL SENSING OF GOLD AND SILVER NANOPARTICLE AGGREGATION:A PRELIMINARY INVESTIGATION." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1376405013.

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Mirzaei, Javad. "Optical and Electro-optical Properties of Nematic Liquid Crystals with Nanoparticle Additives." The Royal Society of Chemistry, 2011. http://hdl.handle.net/1993/30280.

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Liquid crystals (LCs) are an interesting class of materials that are attracting significant attention due to their ever-growing applications in a wide variety of fields such as liquid crystal display (LCD) technology, materials science and bioscience. In recent years, along with the developments of materials at the nanoscale, doping LCs with nanoparticles (NPs) has emerged as a very promising approach for improving LC properties. Nanoparticle additives can introduce novel effects on optical and electro-optical properties of nematic liquid crystals (N-LCs), such as altered molecular alignment,

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Beránek, Jiří. "Povrchové plazmonové rezonance na koloidních nanočásticích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230613.

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The presented diploma thesis is focused on the Localized Surface Plasmons (LSP). The far-field optical response of the colloidal solutions of gold nanoparticles caused by LSP was investigated and compared with the numerical calculations. For the simulations, the Discrete Dipole Approximation (DDA) and Finite-Difference Time Domain (FDTD) techniques were employed. In particular, the shape and size effects of spherical particles and nanorods were studied. The simulations performed by both methods are in a good agreement for the spheres. For the nanorods, the resonance was found to be affected ma

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Kortusová, Dominika. "Příprava nanočástic green syntézou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232068.

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This thesis deals with green synthesis of noble metals nanoparticles. The first part contains secondary literature research which maps both the traditional and newly developed techniques of nanoparticles preparation. Most attention is given to the various types of green synthesis, which constitute an environmentally friendly alternative to industrially applied methods. The second part deals with the preparation of noble metal nanoparticles using tea broths. The section describes the entire synthesis process and includes photographic documentation. A total of eight colloidal solutions were prep

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Bartczak, Dorota. "Synthesis, surface modifications and biomedical applications of colloidal gold nanoparticles, towards controlled regulation of angiogenesis in conjunction with photo-thermal therapy." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/205461/.

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The unique optical properties of colloidal gold nanoparticles: high extinction coefficient and adjustable plasmon band, as well as their excellent biocompatibility (low toxicity and a natural affinity towards thiols and amines) make them very attractive materials for biomedical research. In this project, two types of gold nanoparticles (NPs): spherical and anisotropic were utilised. Spherical NPs predominantly absorb in the visible range of the electromagnetic spectrum, while the plasmon band of anisotropic NPs, e.g. rod-like is shifted into the longer wavelengths. Such variety in the optical

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Darwich, Samer. "Colloidal Gold Nanoparticules : A study of their Drying-Mediated Assembly in Mesoscale Aggregation Patterns and of their AFM Assisted Nanomanipulation on Model Solid Surfaces." Phd thesis, Université de Haute Alsace - Mulhouse, 2011. http://tel.archives-ouvertes.fr/tel-00718640.

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This work deals with the study of the drying-mediated assembly of colloidal gold nanoparticles (Au NPs) in mesoscale aggregation patterns and their manipulation by atomic force microscopy (AFM) on model surfaces. The assembly of NPs in mesoscale and complex aggregation patterns assisted by the wetting and the drying of complex fluids (suspensions of NPs, NPs/biopolymers mixed solutions) on homogeneous and heterogeneous molecular surfaces was studied. This issue is important, both for understanding fundamental processes of self-organization, and for generating new functional mesostructures. The

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Silva, Eid Cavalcante da. "Síntese e propriedades ópticas de sistemas coloidais contendo nanopartículas de ouro dispersas em óleo de mamona." Universidade Federal de Alagoas, 2008. http://repositorio.ufal.br/handle/riufal/1096.

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This dissertation of master s degree presents the results and discussions related to the synthesis, characterization, and stability of a new colloidal system containing gold nanoparticles (AuNP) dispersed in castor oil. In parallel, the stability of the system against agglomeration, after addition of other organic solvents in the medium was evaluated. In collaboration with the Laboratory of Optics and Materials of the Institute of Physics of the Federal University of Alagoas, the non linear optical properties of the new colloidal system were evaluated. The colloids were synthesized via wet che

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Ducay, Rey Nann Mark Abaque. "Direct Detection of Aggregates in Turbid Colloidal Suspensions." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1439434385.

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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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Mioranza, Sônia de Lucena. "Desenvolvimento de teste imunocromatográfico para detecção de anticorpos IgG anti-toxoplasma gondii." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/42/42135/tde-25032010-161527/.

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Sendo uma patologia prevenível e tratável, o importante na toxoplasmose congênita é o diagnóstico precoce, fundamental para intervenção terapêutica imediata. Em Cascavel-PR a soroepidemiologia da toxoplasmose foi avaliada em 334 soros de gestantes, com prevalência de 54% e risco de 2,5%aa de infecção aguda. Para monitorar e instrumentar o pré-natal através da triagem de gestantes soronegativas por acompanhamento mensal foi desenvolvido um teste imunocromatográfico para detecção de anticorpos IgG anti-Toxoplasma gondii. (TIC-toxo). Conjugados de ouro coloidal com diferentes extratos antigênicos

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Ligmajer, Filip. "Uspořádaná a neuspořádaná pole koloidních nanočástic a jejich využití pro detekci biomolekul." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230840.

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This thesis deals with guided self-assembly of gold nanoparticles from their colloidal solutions onto silicon substrates and possible employment of nanoparticles for detection of biomolecules. It was found that by adjustment of solution pH and surface chemistry modification by means of electron beam irradiation it is possible to facilitate nanoparticle deposition to patterns with almost single particle precision. Spectroscopic ellipsometry was then employed in analysis of self-assembled layers of nanoparticles and its combination with a theory of effective medium approximation has proven the a

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