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Author: Aditya Kumar Sahu
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 0
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Book Description
Materials on a scale of 1 - 100 nm have demonstrated that the properties are dependent on their size and shape. [1-3] The non-existence of symmetry at the interface or electron confinement, which is not linear in size, contributes to the creation of new properties on a nanoscale. [1] Thus, the materials at the nanometer scale (1 - 100 nm) contain a cluster of atoms or molecules whose properties are neither of their constituents nor that of the bulk. Noble metal nanoparticles have bright colors due to the surface plasmon resonance absorption. [2] Examination of the absorption of surface plasmon resonance is part of a broad ongoing area of research to investigate properties on the nanometer scale. The color of metal nanoparticles is found to depend on the size and shape of the nanoparticles and the surrounding medium dielectric constant, leading to numerous studies of their synthesis and applications. [3, 4] The complexity of producing the desired size, shape, and monodispersity of nanoparticles continues to press for new and improved synthesis techniques. The development of the required chemical and physical interfaces for interacting with target molecules also involves the need for several different techniques for the synthesis of metal nanoparticles. The increase in the number of available nanoparticles and nanotechnology creates lots of applications and significant advancements in everyday life. Studies attempt to define the features of nanoparticles, contributing to the basic science in a way that provides possibilities for other applications to use nanoparticles.
Author: Aditya Kumar Sahu
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 0
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Book Description
Materials on a scale of 1 - 100 nm have demonstrated that the properties are dependent on their size and shape. [1-3] The non-existence of symmetry at the interface or electron confinement, which is not linear in size, contributes to the creation of new properties on a nanoscale. [1] Thus, the materials at the nanometer scale (1 - 100 nm) contain a cluster of atoms or molecules whose properties are neither of their constituents nor that of the bulk. Noble metal nanoparticles have bright colors due to the surface plasmon resonance absorption. [2] Examination of the absorption of surface plasmon resonance is part of a broad ongoing area of research to investigate properties on the nanometer scale. The color of metal nanoparticles is found to depend on the size and shape of the nanoparticles and the surrounding medium dielectric constant, leading to numerous studies of their synthesis and applications. [3, 4] The complexity of producing the desired size, shape, and monodispersity of nanoparticles continues to press for new and improved synthesis techniques. The development of the required chemical and physical interfaces for interacting with target molecules also involves the need for several different techniques for the synthesis of metal nanoparticles. The increase in the number of available nanoparticles and nanotechnology creates lots of applications and significant advancements in everyday life. Studies attempt to define the features of nanoparticles, contributing to the basic science in a way that provides possibilities for other applications to use nanoparticles.
Author: Evgeny Smirnov
Publisher: Springer
ISBN: 3319779141
Category : Technology & Engineering
Languages : en
Pages : 270
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Book Description
This book is devoted to various aspects of self-assembly of gold nanoparticles at liquid-liquid interfaces and investigation of their properties. It covers primarily two large fields: (i) self-assembly of nanoparticles and optical properties of these assemblies; and (ii) the role of nanoparticles in redox electrocatalysis at liquid-liquid interfaces. The first part aroused from a long-lasting idea to manipulate adsorption of nanoparticles at liquid-liquid with an external electric field to form 'smart' mirrors and/or filters. Therefore, Chapters 3 to 5 are dedicated to explore fundamental aspects of charged nanoparticles self-assembly and to investigate optical properties (extinction and reflectance) in a through manner. Novel tetrathiafulvalene (TTF)-assisted method leads to self-assembly of nanoparticles into cm-scale nanofilms or, so-called, metal liquid-like droplets (MeLLDs) with remarkable optical properties. The second part (Chapters 6 to 8) clarifies the role of nanoparticles in interfacial electron transfer reactions. They demonstrate how nanoparticles are charged and discharged upon equilibration of Fermi levels with redox couples in solution and how it can be used to perform HER and ORR. Finally, Chapter 9 gives a perspective outlook, including applications of suggested methods in fast, one-step preparation of colloidosomes, SERS substrates as well as pioneer studies on so-called Marangony-type shutters drive by the electric field.
Author: Simon Richard Johnson
Publisher:
ISBN:
Category :
Languages : en
Pages : 384
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Book Description
Author: Catherine Louis
Publisher: World Scientific
ISBN: 1786341263
Category : Science
Languages : en
Pages : 681
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Book Description
Gold Nanoparticles for Physics, Chemistry and Biology offers an overview of recent research into gold nanoparticles, covering their discovery, usage and contemporary practical applications.This Second Edition begins with a history of over 2000 years of the use of gold nanoparticles, with a review of the specific properties which make gold unique. Updated chapters include gold nanoparticle preparation methods, their plasmon resonance and thermo-optical properties, their catalytic properties and their future technological applications. New chapters have been included, and reveal the growing impact of plasmonics in research, with an introduction to quantum plasmonics, plasmon assisted catalysis and electro-photon conversion. The growing field of nanoparticles for health is also addressed with a study of gold nanoparticles as radiosensibiliser for radiotherapy, and of gold nanoparticle functionalisation. This new edition also considers the relevance of bimetallic nanoparticles for specific applications.World-class scientists provide the most up-to-date findings for an introduction to gold nanoparticles within the related areas of chemistry, biology, material science, optics and physics. It is perfectly suited to advanced level students and researchers looking to enhance their knowledge in the study of gold nanoparticles.
Author: Jin Zhong Zhang
Publisher: World Scientific
ISBN: 981446936X
Category : Technology & Engineering
Languages : en
Pages : 400
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Book Description
Optical properties are among the most fascinating and useful properties of nanomaterials and have been extensively studied using a variety of optical spectroscopic techniques. A basic understanding of the optical properties and related spectroscopic techniques is essential for anyone who is interested in learning about nanomaterials of semiconductors, insulators or metal. This is partly because optical properties are intimately related to other properties and functionalities (e.g. electronic, magnetic, and thermal) that are of fundamental importance to many technological applications, such as energy conversion, chemical analysis, biomedicine, optoelectronics, communication, and radiation detection.Intentionally designed for upper-level undergraduate students and beginning graduate students with some basic knowledge of quantum mechanics, this book provides the first systematic coverage of optical properties and spectroscopic techniques of nanomaterials.
Author: Michal Malicki
Publisher:
ISBN:
Category : Nanoparticles
Languages : en
Pages :
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Book Description
In order to gain insights into the electronic interactions between metallic gold and self-assembled monolayers composed of π-conjugated thiols, a series of thiol-containing molecules based on a stilbene backbone were synthesized and assembled on gold surface. The resulted monolayers were characterized with a variety of surface-sensitive techniques and the electronic properties of the obtained surfaces were studied with the use of ultraviolet photoelectron spectroscopy. Work-function changes and alignment of the molecular energy levels with respect to the Fermi level of the metal were investigated and important insights regarding the electronic properties of the metal / organic interfaces were obtained. Another aspect of interactions between organic dyes and metallic gold was studied in the context of spectroscopic properties of systems incorporating gold nanoparticles with organic fluorophores covalently attached to the nanoparticle surface. Ultrafast dynamics of the excited-state deactivation of the organic fluorophores attached to the surface of gold nanoparticles were studied with the use of a fs transient absorption technique. It was found that the close proximity of a gold nanoparticle had a profound impact on the excited-state lifetime of the studied organic fluorophore. The influence of the structure of the studied systems on the excited-state deactivation dynamics of the organic fluorophores was described.
Author: Frank Wackenhut
Publisher:
ISBN:
Category :
Languages : en
Pages : 126
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Author: Luca Anghinolfi
Publisher: Springer Science & Business Media
ISBN: 3642304966
Category : Science
Languages : en
Pages : 130
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Book Description
This thesis addresses the fabrication and investigation of the optical response of gold nanoparticle arrays supported on insulating LiF(110) nanopatterned substrates. Motivated by the discovery of the intriguing effects that arise when electromagnetic radiation interacts with metallic nanostructures, the thesis focuses on the application of bottom-up approaches to the fabrication of extended-area plasmonic nanostructures, and the optimization of their optical response. By developing a sophisticated effective-medium model and comparing the experimental findings with model calculations, the author explores the role of the interparticle electromagnetic coupling and array dimensionality on the collective plasmonic behavior of the array, giving insights into the physical mechanisms governing the optical response.
Author: Abagail Jarnagin
Publisher: Nova Science Publishers
ISBN: 9781622579273
Category : Gold
Languages : en
Pages : 0
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Book Description
In this book, the authors present current research in the study of the synthesis, optical properties and applications for cancer treatment of gold nanoparticles. Topics discussed include the use of gold nanoparticles in cancer treatment and biomedical applications to target tumors and provide detection, drug carriers, gene silencing and radiotherapy; gold nanoparticle fabrication by laser ablation technique and their optical and morphological study; gold nanoparticles for metabolite imaging; formation of gold nanoparticles inside the corona of amphiphilic triblock copolymer micelles; and the intracellular delivery of gold nanoparticles and their application in nanomedicine.
Author: Adam M. Schwartzberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 330
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Book Description
