Surface Modification Using Thin Films of Gold Nanoparticles PDF Download
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Author: Alexandria J. Bear
Publisher:
ISBN:
Category : Gold films
Languages : en
Pages : 84
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Book Description
Author: Alexandria J. Bear
Publisher:
ISBN:
Category : Gold films
Languages : en
Pages : 84
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Book Description
Author: Ion N. Mihailescu
Publisher: MDPI
ISBN: 3039284541
Category : Technology & Engineering
Languages : en
Pages : 276
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Book Description
The Special Issue “Synthesis and Modification of Nanostructured Thin Films” highlights the recent progress in thin film synthesis/modification and characterization. New methods are reviewed for the synthesis and/or modification of thin films based on laser, magnetron, chemical, and other techniques. The obtained thin nanostructures are characterized by complex and complementary techniques. We think that most of proposed methods can be directly applied in production, but some others still need further elaboration for long-term prospective applications in lasers, optics, materials, electronics, informatics, telecommunications, biology, medicine, and probably many other domains. The Guest Editor and the MDPI staff are therefore pleased to offer this Special Issue to interested readers, including graduate and PhD students as well as postdoctoral researchers, but also to the entire community interested in the field of nanomaterials. We share the conviction that this can serve as a useful tool for updating the literature, but also to aid in the conception of new production and/or research programs. There is plenty of room for further dedicated R&D advances based on new instruments and materials under development.
Author: Jeanne J. Xu
Publisher:
ISBN:
Category : Gold
Languages : en
Pages : 53
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Book Description
Thin films of gold nanoparticles (Au NPs) are of interest because of their unique physicochemical properties. These thin films have potential applications in electrical devices, chemical sensing, and biosensing. Retaining the integrity of the thin film is important for such applications. The purpose of this project is to assess the temporal stability and to explore the mechanisms of degradation of thin films of Au NPs on glass substrates. Thin films were fabricated through a layer-by-layer deposition process. Clean glass substrates were sequentially immersed in solutions of (3-aminopropyl)trimethoxysilane, synthesized Au NPs, and 1-dodecanethiol (DT). The wettability of each layer was characterized with contact angle goniometry. Upon the completion of thin film fabrication, slides were immersed in ultrapure water (nH2O) and changes in wettability were observed over a 7-day period. Although thin films of gold had more hydrophobic surfaces than DT-containing controls lacking Au NPs, there was still a significant decrease in contact angle once the films were immersed in high purity water. Thin film degradation was quantified by a decrease in contact angle. Two possible mechanisms of thin film degradation were investigated: (1) the desorption of DT from thin films by oxidation and (2) the desorption of Au NPs from the thin films. Antioxidant was added to the storage solution to test the oxidation mechanism. Contact angle analysis was used to monitor the changes in wettability of thin films in nH2O with antioxidant. The presence of antioxidant in nH2O improved thin film integrity. Inductively coupled plasma atomic emission spectroscopy was used to determine the change in Au3+ concentration from day 0 and day 7. No substantial change in Au3+ was observed from day 0 to day 7. Between the two mechanisms that were explored, thin film degradation appeared to occur primarily by the oxidation of DT molecules and their desorption into the surrounding medium.
Author: John Alexander
Publisher: Springer
ISBN: 3319342290
Category : Technology & Engineering
Languages : en
Pages : 366
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Book Description
This outstanding thesis provides a wide-ranging overview of the growth of titanium dioxide thin films and its use in photo-electrochemicals such as water splitting. The context for water splitting is introduced with the theory of semiconductor-liquid junctions, which are dealt with in detail. In particular plasmonic enhancement of TiO2 by the addition of gold nanoparticles is considered in depth, including a thorough and critical review of the literature, which discusses the possible mechanisms that may be at work. Plasmonic enhancement is demonstrated with gold nanoparticles on Nb-doped TiO2. Finally, the use of temperature and pressure to control the phase and morphology of thin films grown by pulsed laser deposition is presented.
Author: Marie-Isabelle Baraton
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 340
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Book Description
Synthesis, Functionalization and Surface Treatment of Nanoparticles is an area of crucial importance in the emerging field of nanotechnology. Controlling the surface chemical composition and mastering its modification at the nanometer scale are critical issues for high-added value applications involving nanoparticles. The basic applications of surface functionalization range from altering the wetting or adhesion characteristics and improving the nanoparticles dispersion in matrices to enhancing the catalytic properties and ordering the interfacial region, and such. The creation of specific surface sites on nanoparticles for selective molecular attachment is considered a promising approach for their applications in nanofabrication, nanopatterning, selfassembly, nanosensors, bioprobes, drug delivery, pigments, photocatalysis, LEDs, etc. This book presents novel and improved synthesis methods and approaches for controlling and functionalizing the nanoparticle surfaces to enhance the overall performance of the nanoparticles for targeted applications.
Author: Ann C. Gaffey
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
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Book Description
Author: Janelle Dawn Secl Newman
Publisher:
ISBN:
Category : Colloidal gold
Languages : en
Pages : 350
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Book Description
Author: Ramya Vedaiyan
Publisher:
ISBN:
Category : Bimetallism
Languages : en
Pages : 498
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Book Description
Focuses on the surface modification of gold and bimetallic (gold/silver) nanoparticles of definite size and different aspect ratio and are readily dispersed in polymer matrix. Discusses tailoring the materials for their application as the polymeric chemical sensors and gas separation membranes.
Author: Manoj B. Gawande
Publisher: Elsevier
ISBN: 0128236027
Category : Science
Languages : en
Pages : 392
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Book Description
Surface Modified Nanomaterials for Applications in Catalysis: Fundamentals, Methods and Applications provides an overview of the different state-of-the-art surface modification methods of nanomaterials and their commercial applications. The main objective of this book is to comprehensively cover the modification of nanomaterial and their fabrication, including different techniques and discussions of present and emerging commercial applications. The book addresses fundamental chemistry concepts as applied to the modification of nanomaterials for applications in energy, catalysis, water remediation, sensors, and more. Characterization and fabrication methodologies are reviewed, along with the challenges of up-scaling of processes for commercial applications. This book is suitable for academics and practitioners working in materials science, engineering, nanotechnology, green chemistry and chemical engineering. Provides an overview of the basic principles of surface modification of nanomaterials Reviews useful fabrication and characterization methodologies for key applications Addresses surface modified nanomaterials for applications in catalysis, energy, sensor, environment, and more
Author: Zhen Ma
Publisher: Royal Society of Chemistry
ISBN: 1782621644
Category : Science
Languages : en
Pages : 635
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Book Description
Once considered an inert element, gold has recently gained attention as a catalyst. With hundreds of papers being published each year, this book presents a comprehensive review of this rapidly-evolving field, with contributions by leading experts across the globe. Going through the chapters citing the primary literature, the reader will gain a thorough background to the use of gold in catalysis, as well as the latest methods for the preparation of gold catalysts. Other chapters demonstrate the characterisation and modelling of gold-catalysed reactions, with consideration given to both the fundamentals and commercial applications of this emerging group of catalysts. Written to be accessible by postgraduates and newcomers to the field, this book will also benefit experienced researchers and therefore be an essential reference in the laboratory.
