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Download or read book Characterization and application of DNA-templated silver nanoclusters and polarized spectroscopy of self-assembled nanostructures written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.:/5 (978 download)
Download or read book Characterization and Application of DNA-templated Silver Nanoclusters and Polarized Spectroscopy of Self-assembled Nanostructures written by and published by . This book was released on 2017 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sabu Thomas
Publisher : Woodhead Publishing
ISBN 13 : 0323886418
Total Pages : 728 pages
Book Rating : 4.3/5 (238 download)
Download or read book Luminescent Metal Nanoclusters written by Sabu Thomas and published by Woodhead Publishing. This book was released on 2022-06-28 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Luminescent Metal Nanoclusters: Synthesis, Characterization, and Applications provides a comprehensive accounting of various protocols used for the synthesis of metal nanoclusters, their characterization techniques, toxicity evaluation and various applications and future prospects. The book provides detailed experimental routes, along with mechanisms on the formation of benign metallic clusters using biomaterials and a comprehensive review regarding the preparation, properties and prospective applications of these nano clusters in various fields, including therapeutic applications. Various methods to protect nanocluster materials to increase their stability are emphasized, including the incorporation of ligands (protein, small molecule, DNA, thiols). This book addresses a gap in the current literature by bringing together the preparation, characterization and applications of all the possible types of reported metal nanoclusters and their hybrids. It is suitable for materials scientists and engineers in academia and those working in research and development in industry. It may also be of interest to those working in the interdisciplinary nanotechnology community, such as physical chemists. Covers the most relevant material categories of luminescent nanoclusters such as metal nanoclusters, nano composites and alloy nanoclusters Provides a comprehensive overview of the various available methods used for the protection of nanoclusters Discusses the latest advances and future opportunities in addressing challenges in producing benign nanomaterials such as toxicity and stability
Author : Khan Maaz
Publisher :
ISBN 13 : 1789234786
Total Pages : 290 pages
Book Rating : 4.7/5 (892 download)
Download or read book Silver Nanoparticles written by Khan Maaz and published by . This book was released on 2018-07 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nadine Kammerlander
Publisher : Diplomica Verlag
ISBN 13 : 3836674653
Total Pages : 119 pages
Book Rating : 4.8/5 (366 download)
Download or read book Metallized DNA written by Nadine Kammerlander and published by Diplomica Verlag. This book was released on 2009-07 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metallic nanoparticles have been studied intensively during the last decades because of their intriguing optical properties: Due to collective oscillations of the conducting electrons - the so called plasmonic oscillations - they absorb light in the visible spectrum. The resonance frequency thereby sensitively depends on parameters such as the particle size and shape as well as the dielectric constant of the medium. DNA exhibits outstanding recognition properties and can be modified easily. Thus, template-directed material synthesis along synthetic DNA is a promising route to grow nanoparticles of defined shape and size and with defined interparticle-spacing. In this study, two different methods are used to deposit silver on oligonucleotides of different lengths, ranging from 23 to 96 basepairs, in order to synthesize metallic nanorods of controlled aspect ratios. The first method involves the specific labeling of nucleotides with aldehyde groups, followed by exposure to a Tollens reagent and a developer. The second method relies on the photoinduced deposition of silver onto unmodified DNA samples. Several preparation parameters such as the DNA sequence, buffer salt type, silver concentration and UV illumination time are varied systematically. The metallized DNA molecules are characterized concerning their optical and structural properties. Absorption spectra show plasmon peaks around 420nm. Peak positions, intensities and bandwidths are analyzed. Dynamic Light Scattering studies in solution provide information about the particle sizes as well as their structural asymmetry. Both optical techniques are used to observe the temporal evolution of the nanoparticle growth in the Tollens metallization process. Structural information is inferred from Atomic Force Microscopy; for that purpose, the particles are deposited on single-crystalline silicon substrates.
Author : Samir Kumar
Publisher : BoD – Books on Demand
ISBN 13 : 1839686596
Total Pages : 268 pages
Book Rating : 4.8/5 (396 download)
Download or read book Silver Micro-Nanoparticles written by Samir Kumar and published by BoD – Books on Demand. This book was released on 2021-09-15 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the different methodologies for producing and synthesizing silver nanoparticles (AgNPs) of various shapes and sizes. It also provides an in-depth understanding of the new methods for characterizing and modifying the properties of AgNPs as well as their properties and applications in various fields. This book is a useful resource for a wide range of readers, including scientists, engineers, doctoral and postdoctoral fellows, and scientific professionals working in specialized fields such as medicine, nanotechnology, spectroscopy, analytical chemistry diagnostics, and plasmonics.
Author : Sung Ha Park
Publisher :
ISBN 13 :
Total Pages : 218 pages
Book Rating : 4.:/5 (621 download)
Download or read book Self-assembled DNA Nanostructures and DNA-templated Silver Nanowires written by Sung Ha Park and published by . This book was released on 2005 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Michael Green
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (114 download)
Download or read book Nanoscale Optical and Correlative Microscopies for Quantitative Characterization of DNA Nanostructures written by Christopher Michael Green and published by . This book was released on 2019 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Methods to engineer nanomaterials and devices with uniquely tailored properties are highly sought after in fields such as manufacturing, medicine, energy, and the environment. The macromolecule deoxyribonucleic acid (DNA) enables programmable self-assembly of nanostructures with near arbitrary shape and size and with unprecedented precision and accuracy. Additionally, DNA can be chemically modified to attach molecules and nanoparticles, providing a means to organize active materials into devices with unique or enhanced properties. One particularly powerful form of DNA-based self-assembly, DNA origami, provides robust structures with the potential for nanometer-scale resolution of addressable sites. DNA origami are assembled from one large DNA "scaffold" strand and many unique, short "staple" strands; each staple programmatically binds the scaffold at several distant domains, and the coordinated interactions of many staples with the scaffold act to fold the scaffold into a desired shape. The utility of DNA origami has been demonstrated through multiple applications, such as plasmonic and photonic devices, electronic device patterning, information storage, drug delivery, and biosensors. Despite the promise of DNA nanotechnology, few products have successfully translated from the laboratory to industry. Achieving high yield and high-precision synthesis of stable DNA nanostructures is one of the biggest challenges to applications of DNA nanostructures. For adoption in manufacturing, methods to measure and inspect assembled structures (i.e. metrology) are essential. Common high-resolution imaging techniques used to characterize DNA nanostructures, such as atomic force microscopy and transmission electron microscopy, cannot facilitate high-throughput characterization, and few studies have been directed towards the development of improved methods for nanoscale metrology. DNA-PAINT super-resolution microscopy enables high-resolution, multiplexed imaging of reactive sites on DNA nanostructures and offers the potential for inline optical metrology. In this work, nanoscale metrologies utilizing DNA-PAINT were developed for DNA nanostructures and applied to characterize DNA origami arrays and single site defects on DNA origami. For metrology of DNA origami arrays, an embedded, multiplexed optical super-resolution methodology was developed to characterize the periodic structure and defects of two-dimensional arrays. Images revealed the spatial arrangement of structures within the arrays, internal array defects, and grain boundaries between arrays, enabling the reconstruction of arrays from the images. The nature of the imaging technique is also highly compatible with statistical methods, enabling rapid statistical analysis of synthesis conditions. To obtain a greater understanding of DNA origami defects at the scale of individual strands, correlative super-resolution and atomic force microscopies were enabled through the development of a simple and flexibl."--Boise State University ScholarWorks.
Author : Junying Zhang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (935 download)
Download or read book Physicochemical Characterization of Self-assembled Nanostructures by NMR Spectroscopy written by Junying Zhang and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xin Luo
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (131 download)
Download or read book Bottom-up Construction of Complex Metal Nanoparticle Structures with DNA as a Chaperone written by Xin Luo and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Nanoscale metal structures has been an essential topic in modern nanotechnology due to their wide range of applications in catalysis, sensing, diagnosis, medicine and optics. Plasmonic metal nanostructures have attracted particular attention, as their light-focusing property can be efficiently tuned by changing their spatial structure. Traditionally, top-down lithography approaches have been the main tool to implement precise metal nanostructure designs, which, however, has shown drawbacks such as low throughput, high cost and low resolution when reaching the sub-5 nm scale. Over the past two decades, the field of DNA nanotechnology has enabled the fabrication of increasingly complex one-, two- and three-dimensional nanostructures with unprecedented specificity, programmability, and sub-nanometer precision. These DNA structures have been demonstrated to be an ideal chaperone for the bottom-up self-assembly of metal nanostructures, pushing the boundaries of plasmonic nanophotonics design and fabrication. This thesis targets a few challenges in constructing complex metal nanostructures with DNA as a template. First, to access hierarchical assembly in 3D, nanoparticles must be functionalized with anisotropic valency-controlled DNA strands. We developed a simple one-step method to encode 3D DNA strand patterns to gold nanoparticles with a controlled number of unique DNA strands in a predesigned spatial arrangement, through encapsulating the gold nanoparticle into a predesigned DNA minimal nanocage. The encapsulated gold nanoparticle, as a building block, inherits the 3D anisotropic molecular information from the DNA nanocage with enhanced structural stability, which allows its hierarchical self-assembly into complex metal architectures. Second, we developed an Assemble, Grow and Lift-Off (AGLO) strategy to construct robust standalone gold nanostructures with pre-designed customizable shapes in solution, using only a simple 2D DNA origami sheet as a transient template. AuNP seeds were assembled on DNA origami template in a predesigned shape, grown to merge into robust gold structures, and lifted-off to regenerate and recycle the DNA origami template. Finally, we discovered a Contact-dependent Localized Electrochemical Ripening (CLER) mechanism with DNA-templated metal growth, which, for the first time, systematically explains the heterogenous silver deposition phenomenon. The mechanism can be manipulated to synthesize deterministic asymmetric metal structures with core-shell NPs of pre-designed arrangements in a one-pot system, which demonstrates promising applications in surface-enhanced Raman spectroscopy. Overall, the work presented in this thesis not only pushes DNA-templated metal structures forward by demonstrating practical strategies to increase the 3D metal structure complexity and robustness, but also offers valuable fundamental insights in metal growth mechanisms. This knowledge provides guidelines for the future design and construction of DNA-templated metal structures. More importantly, the new mechanisms discovered contribute to the fundamental understanding of the metal nanoparticle synthesis process"--
Author : Tatyana Shabatina
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)
Download or read book Self-Assembled Nanostructures Formation in Hybrid Metal-Mesogenic Systems written by Tatyana Shabatina and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter reviews the methods of supramolecular chemistry and cryochemistry to study the formation, morphological and structural properties, and possible applications of hybrid nanostructures and nanosized aggregates comprising plasmonic metals (silver and copper) and several mesogenic compounds, which exhibit different liquid crystalline mesophases,Äînematics, smectics, and cholesterics. Low-temperature vacuum co-condensation of reagent vapors on cooled surfaces of quartz, KBr, CaF2, or polished copper was used to synthesize hybrid nanosystems including silver and copper and long-chain mesogenic derivatives of alkylcyanobiphenyls under molecular beam conditions. Controlled thermal treatment of the samples allowed the directed formation of metal nanoparticles of definite size from 2 up to 100¬†nm. It was shown that the procedures of temperature treatments and molecular self-organization of different liquid crystalline phases controlled the size and morphology of nanoparticles and their aggregates, which were formed in the system. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) data of the samples show the formation of orientationally ordered structures in nematic mesophases. Formation of flat 2D aggregates was found in layered smectic mesophases. Optical absorbance spectra of silver/4-pentyl-4-cyanobiphenyl (Ag/5-°-í) and copper/4-pentyl-4-cyanobiphenyl (Cu/5CB) samples encapsulated in polymer poly-para-xylylene at 300¬†K contained characteristic bands of plasmonic absorbance of metal nanoparticles at 420,Äì440¬†nm and 560,Äì600¬†nm. Rising metal concentration in the sample led to the performable growth of rod-like metal particles with anisometric ratio l/d¬†>¬†20 and intensive absorbance at higher wavelengths (Œa¬†,╬†650¬†nm). New hybrid nanosystems based on biomolecules of cholesterol or its heteroatomic analog thiocholesterol including nanosized silver particles of d¬†=¬†5.0¬†¬±¬†0.5 and d¬†=¬†2.5¬†¬±¬†0.5¬†nm, respectively, were obtained. Highly ordered 1D-, 2D-, and 3D structures containing silver nanoparticles were formed from concentrated organic sols at different support surfaces by removing the inert solvent from triple metal/ligand/solvent system and by cooling the binary metal/ligand system from isotropic state to the cholesteric liquid crystalline mesophase. The microstructure and composition of the hybrid nanosystems were characterized by FTIR, UV-Vis spectroscopy, TEM, and selected area electron diffraction (SAED). It was shown that hybrid nanosystems based on silver nanoparticles covered by a stabilizing layer of mesogenic molecules of thiocholesterol display selectivity in adsorption of optical isomers of the selected compounds.
Author : Michael Faraday
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.B/5 (1 download)
Download or read book Experimental Relations of Gold (and Other Metals) to Light written by Michael Faraday and published by . This book was released on 1857 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zhiyong Tang
Publisher : John Wiley & Sons
ISBN 13 : 3527337571
Total Pages : 300 pages
Book Rating : 4.5/5 (273 download)
Download or read book Chiral Nanomaterials written by Zhiyong Tang and published by John Wiley & Sons. This book was released on 2018-03-05 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thorough and up-to-date, this book presents recent developments in this exciting research field. To begin with, the text covers the fabrication of chiral nanomaterials via various synthesis methods, including electron beam lithography, ion beam etching, chemical synthesis and biological DNA directed assembly. This is followed by the relevant theory and reaction mechanisms, with a discussion of the characterization of chiral nanomaterials according to the optical properties of metal nanoparticles, semiconductor nanocrystals, and nanoclusters. The whole is rounded off by a summary of applications in the field of catalysis, sensors, and biomedicine. With its comprehensive yet concise coverage of the whole spectrum of research, this is invaluable reading for senior researchers and entrants to the field of nanoscience and materials science.
Author : Daniel L. Fedlheim
Publisher : CRC Press
ISBN 13 : 9780585404394
Total Pages : 348 pages
Book Rating : 4.4/5 (43 download)
Download or read book Metal Nanoparticles written by Daniel L. Fedlheim and published by CRC Press. This book was released on 2001-10-26 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: A state-of-the-art reference, Metal Nanoparticles offers the latest research on the synthesis, characterization, and applications of nanoparticles. Following an introduction of structural, optical, electronic, and electrochemical properties of nanoparticles, the book elaborates on nanoclusters, hyper-Raleigh scattering, nanoarrays, and several applications including single electron devices, chemical sensors, biomolecule sensors, and DNA detection. The text emphasizes how size, shape, and surface chemistry affect particle performance throughout. Topics include synthesis and formation of nanoclusters, nanosphere lithography, modeling of nanoparticle optical properties, and biomolecule sensors.
Author : Guowei Yang
Publisher : CRC Press
ISBN 13 : 9814241520
Total Pages : 1166 pages
Book Rating : 4.8/5 (142 download)
Download or read book Laser Ablation in Liquids written by Guowei Yang and published by CRC Press. This book was released on 2012-02-22 with total page 1166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the fundamental concepts and physical and chemical aspects of pulsed laser ablation of solid targets in liquid environments and its applications in the preparation of nanomaterials and fabrication of nanostructures. The areas of focus include basic thermodynamic and kinetic processes of laser ablation in liquids, and its applic
Author : Richard W. Siegel
Publisher : Springer Science & Business Media
ISBN 13 : 9780792358541
Total Pages : 378 pages
Book Rating : 4.3/5 (585 download)
Download or read book Nanostructure Science and Technology written by Richard W. Siegel and published by Springer Science & Business Media. This book was released on 1999-09-30 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Timely information on scientific and engineering developments occurring in laboratories around the world provides critical input to maintaining the economic and technological strength of the United States. Moreover, sharing this information quickly with other countries can greatly enhance the productivity of scientists and engineers. These are some of the reasons why the National Science Foundation (NSF) has been involved in funding science and technology assessments comparing the United States and foreign countries since the early 1980s. A substantial number of these studies have been conducted by the World Technology Evaluation Center (WTEC) managed by Loyola College through a cooperative agreement with NSF. The National Science and Technology Council (NSTC), Committee on Technology's Interagency Working Group on NanoScience, Engineering and Technology (CT/IWGN) worked with WTEC to develop the scope of this Nanostucture Science and Technology report in an effort to develop a baseline of understanding for how to strategically make Federal nanoscale R&D investments in the coming years. The purpose of the NSTC/WTEC activity is to assess R&D efforts in other countries in specific areas of technology, to compare these efforts and their results to U. S. research in the same areas, and to identify opportunities for international collaboration in precompetitive research. Many U. S. organizations support substantial data gathering and analysis efforts focusing on nations such as Japan. But often the results of these studies are not widely available. At the same time, government and privately sponsored studies that are in the public domain tend to be "input" studies.
Author : Ramesh S. Chaughule
Publisher :
ISBN 13 : 9781588831804
Total Pages : 413 pages
Book Rating : 4.8/5 (318 download)
Download or read book Nanoparticles written by Ramesh S. Chaughule and published by . This book was released on 2010 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt:
