Download or read book Controlling Nanomaterial Self assembly for Next Generation Optoelectronic Applications written by Mark Clayton Weidman and published by . This book was released on 2017 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor nanocrystals, also known as quantum dots, are an exciting class of materials because their band gap can be tuned according to the nanocrystal size. In this way, the material band gap can be largely decoupled from its atomic composition - a property unique to this system. The potential applications for semiconductor nanocrystals are wide ranging and include: LEDs, photovoltaics, photon downconversion, photon upconversion, and thermoelectrics. However, their size-dependent band gap can also be a hindrance, as any size variation in the ensemble of nanocrystals introduces energetic disorder and spatial disorder in films. While synthesized as a colloid, for most applications the nanocrystals are deposited as a thin film. The rate of energy transfer between nanocrystals in the film, dictated by the arrangement and distance between neighbors, is therefore a critical parameter affecting device efficiency. As a result, controlling the nanocrystal physical arrangement is crucial to the success of these materials. Despite this, there is a lack of understanding of how to observe and control these processes at the nanoscale. This thesis begins by improving the synthesis of lead sulfide (PbS) nanocrystals to produce narrow size dispersity ensembles with tunable average size by ensuring the reaction is diffusion-limited. We then experimentally determine what parameters (ligand coverage, solvent, size dispersity) most affect the ability of these nanocrystals to self-assemble into highly ordered superlattice structures. We show that superlattices can be produced with a wide variety of surface ligands of differing lengths, either directly from a colloidal suspension or post-deposition and we thoroughly characterize the interparticle spacing as a function of ligand species. Next, we demonstrate an in situ X-ray scattering technique which enables the real-time visualization of nanocrystal self-assembly, with details unprecedented by any other experimental method. This technique led to a better understanding of the colloid to superlattice transition, including the observation of intermediate states and the ability to compare kinetics of different self-assembly aspects. Finally, we present experimental measurements demonstrating that nanocrystal size dispersity and selfassembly are critical to efficient energy transfer in films and that as energetic disorder is minimized through improved synthetic methods, spatial disorder becomes an increasingly important parameter to control. In the final experimental chapter of this thesis, we apply this knowledge to a different material system perovskite nanoplatelets, which have the potential to be useful as an inexpensive, solution-processable emission material. For these 2D materials, we optimize the thickness homogeneity and study the selfassembly of the nanoplatelets into stacked superstructures. We highlight the incredible tunability of this material system accessible through thickness and compositional tuning, which allows absorption and emission to be shifted across the entire visible range. Lastly, we demonstrate the potential of this system for next generation LEDs.

Download or read book Self Assembly of Nanostructures written by Stefano Bellucci and published by Springer. This book was released on 2011-10-26 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the third volume in a series of books on selected topics in Nanoscale Science and Technology based on lectures given at the well-known Istituto Nazionale di Fisica Nucleare (INFN) schools of the same name. The present set of notes stems in particular from the participation and dedication of prestigious lecturers, such as Nunzio Motta, Fulvia Patella, Alexandr Toropov, and Anna Sgarlata. All lectures have been carefully edited and reworked, taking into account extensive follow-up discussions. A tutorial lecture by Motta et al. presents the analysis of the Poly(3-hexylthiophene) self assembly on carbon nanotubes and discusses how the interaction between the two materials forms a new hybrid nanostructure, with potential application to future solar cells technology. In their contribution, Patella et al. review quantum dots of III-V compounds, which offer appealing perspectives for more sophisticated applications in new generation devices such as single-photon emitters for nano-photonics and quantum computing. Focusing on self-assembled quantum dots, the chapter by Alexandr Toropov et al. provides a comprehensive review of some important aspects in the formation of quantum dots and presents the results of the authors’ extensive investigation of the features of droplet epitaxy. The fourth contribution, by Sgarlata et al., focuses on recent progress toward controlled growth of self-assembled nanostructures, dealing with the shaping, ordering and localization in Ge/Si heteroepitaxy and reviewing recent results on the self-organization of Ge nanostructures at Si surfaces.

Download or read book Materials Nanoarchitectonics written by Katsuhiko Ariga and published by Elsevier. This book was released on 2023-12-07 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Nanoarchitectonics: From Integrated Molecular Systems to Advanced Devices provides the latest information on the design and molecular manipulation of self-organized hierarchically structured systems using tailor-made nanoscale materials as structural and functional units. The book is organized into three main sections that focus on molecular design of building blocks and hybrid materials, formation of nanostructures, and applications and devices. Bringing together emerging materials, synthetic aspects, nanostructure strategies, and applications, the book aims to support further progress, by offering different perspectives and a strong interdisciplinary approach to this rapidly growing area of innovation. This is an extremely valuable resource for researchers, advanced students, and scientists in industry, with an interest in nanoarchitectonics, nanostructures, and nanomaterials, or across the areas of nanotechnology, chemistry, surface science, polymer science, electrical engineering, physics, chemical engineering, and materials science. - Offers a nanoarchitectonic perspective on emerging fields, such as metal-organic frameworks, porous polymer materials, or biomimetic nanostructures - Discusses different approaches to utilizing "soft chemistry" as a source for hierarchically organized materials - Offers an interdisciplinary approach to the design and construction of integrated chemical nano systems - Discusses novel approaches towards the creation of complex multiscale architectures

Download or read book Peptide Based Materials written by Timothy Deming and published by Springer Science & Business Media. This book was released on 2012-01-10 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesis of Polypeptides by Ring-Opening Polymerization of α-Amino Acid N-Carboxyanhydrides, by Jianjun Cheng and Timothy J. Deming.- Peptide Synthesis and Self-Assembly, by S. Maude, L. R. Tai, R. P. W. Davies, B. Liu, S. A. Harris, P. J. Kocienski and A. Aggeli.- Elastomeric Polypeptides, by Mark B. van Eldijk, Christopher L. McGann, Kristi L. Kiick andJan C. M. van Hest.- Self-Assembled Polypeptide and Polypeptide Hybrid Vesicles: From Synthesis to Application, by Uh-Joo Choe, Victor Z. Sun, James-Kevin Y. Tan and Daniel T. Kamei.- Peptide-Based and Polypeptide-Based Hydrogels for Drug Delivery and Tissue Engineering, by Aysegul Altunbas and Darrin J. Pochan.-

Download or read book Evaporative Self assembly Of Ordered Complex Structures written by Zhiqun Lin and published by World Scientific. This book was released on 2012-02-28 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of spontaneous self-assembly, as a lithographic tool and as an external field-free means to construct well-ordered and intriguing patterns, has received much attention due to its ease of producing complex, large-scale structures with small feature sizes. An extremely simple route to highly-ordered, complex structures is the evaporative self-assembly of nonvolatile solutes (e.g., polymers, nanoparticles, carbon nanotubes, and DNA) from a sessile droplet on a solid substrate. To date, a few studies have elegantly demonstrated that self-organized nanoscale, microscale, and hierarchically structured patterns have been readily obtained from sophisticated control of droplet evaporation. These include convective assembly in evaporating menisci, the alignment of nanomaterials by programmed dip coating and controlled anisotrophic wetting/dewetting processes, facile microstructuring of functional polymers by the “Breath Figure” method, controlled evaporative self-assembly in confined geometries, etc.This book is unique in this regard in providing a wide spectrum of recent experimental and theoretical advances in evaporative self-assembly techniques. The ability to engineer an evaporative self-assembly process that yields a broad range of complex, well-ordered and intriguing structures with small feature sizes composed of polymers of nanocrystals of different size and shapes as well as DNA over large areas offers tremendous potential for applications in electronics, optoelectronics, photonics, sensors, information processing and data storage devices, nanotechnology, high-throughput drug discovery, chemical detection, combinatorical chemistry, and biotechnology.

Download or read book Self Assembly of Nanostructures and Patchy Nanoparticles written by Shafigh Mehraeen and published by BoD – Books on Demand. This book was released on 2020-11-04 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Top-down approaches are currently the main contributor of fabricating microelectronic devices. However, the prohibitive cost of numerous technological steps in these approaches is the main obstacle to further progress. Furthermore, a large number of applications necessitate fabrication of complex and ultra-small devices that cannot be made using these approaches. New approaches based on natural self-assembly of matter need to be developed to allow for fabrication of micro and nanoelectronic devices. Self-assembly of nanostructures is a dynamic field, which explores physics of these structures and new ways to fabricate them. However, the major problem is how to control the properties of the nanostructures resulting from low dimensionality. This book presents recent advances made to address this problem, and fabricate nanostructures using self-assembly.

Download or read book Organic Nanostructures for Next Generation Devices written by Katharina Al-Shamery and published by Springer Science & Business Media. This book was released on 2007-12-29 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This jaw-dropping window on the future is the first comprehensive overview of the fabrication, fundamental properties, and applications of a new class of nanoscaled organic materials. These materials offer incredible scope to scientists wanting to exploit their optical and electronic properties and offer the potential to create a new generation of tiny devices with powerful applications. Altogether, the book offers a unique integration of organic materials science basics, nanostructured organic materials fabrication, and device applications.

Download or read book Oriented Self Assembly of Colloidal Semiconductor Nanoplatelets on Liquid Interfaces written by Onur Erdem and published by Springer Nature. This book was released on 2022-10-27 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the fabrication of orientation-controlled colloidal quantum well (nanoplatelet) thin films using liquid interface self-assembly. The book details methods for orientation-controlled deposition of CdSe core nanoplatelets for characterization of directional energy transfer in nanoplatelets and layer-by-layer construction of CdSe/CdZnS core/shell nanoplatelets to create optically active waveguides with precisely tunable thickness and excellent uniformity across device scale. It also provides a future outlook for construction of large-scale two- and three-dimensional nanoplatelet superstructures and their incorporation into device fabrication.

Download or read book Nanoparticles written by Tang Jun and published by LAP Lambert Academic Publishing. This book was released on 2014-12-09 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research in nanostructured materials is motivated by the belief that ability to control the building blocks or nanostructure of the materials can result in enhanced properties at the macroscale: increased hardness, ductility, magnetic coupling, catalytic enhancement, selective absorption, or higher efficiency electronic or optical behavior. Two approaches for the building up of nanoscopic features have been envisaged: top-down and bottom-up. Bottom-up approaches seek to have smaller (usually molecular) components built up into more complex assemblies, while top-down approaches seek to create nanoscale devices by using larger, externally-controlled ones to direct their assembly. This work is mainly dedicated to the self-assembly process of nanoparticles which are synthesized physically or chemically. Our target is to develop new nanoparticle self-assembly process based on the nanoparticles we have synthesized. To further expand our fabrication techniques to engineering applications, we have studied the electrical or optical properties of these nanomaterial structures and we have developed some new chemical sensors out of them.

Download or read book DNA Guided Self Assembly of Nanocrystals for Optoelectronic Devices written by Hyunwoo Noh and published by . This book was released on 2013 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: While inherent properties of nanocrystals have been actively investigated within the last decade, control over positioning and ordering of nanomaterials at multiple length scales has been difficult to achieve. In the research shown here, DNA is used in conjunction with metal and semiconductor nanocrystals to facilitate their assembly at precise locations on a substrate with potential for programmable ordering. The inimitable ability of DNA to binding through stable, specific, and reversible molecular recognition has allowed the creation of nanocrystal assemblies through extraordinary control over spatial location and crystallization. We first show an inexpensive printing method that enables repeated patterning of large area arrays of nanoscale materials by AFM and fluorescence microscopy. DNA strands were patterned with 50nm resolution by a soft-lithographic subtraction printing process and DNA hybridization was used to direct the assembly of 10nm gold nanoparticles to create ordered two-dimensional nanoparticle arrays. This technique was further modified to demonstrate methods to generate patterned nanocrystal superlattices. Electron microscopy and fourier transformation analysis were used to investigate the role of chemical and geometrical confinement on interparticle DNA hybridization and particle packing and obtaining long-range order. Using similar strategies, we also demonstrate the generation of highly ordered 3-D body-centered-cubic (BCC) superlattices of gold nanocrystals at desired areas on a surface through specific DNA interactions. In this work, controlled film thicknesses from 20nm to 100nm could be easily obtained by varying initial gold nanoparticle concentrations and particles remained ordered in the z-direction as well. These gold nanoparticle studies were then applied toward producing 3D thin film arrays of quantum dots (QDs) For this, successful aqueous phase transfer of CdTe QDs for DNA conjugation was first demonstrated. Next, the DNA conjugated CdTe QDs were assembled on TiO2 films to fabricate ITO/TiO2/DNA-CdTe/Au thin film devices which were then tested by current-voltage measurements. We demonstrate that producing close packed arrays as opposed to disordered ones significantly improves film formation with less defects. By tuning the QD size and film thicknesses, the correlation between Voc and Jsc values was investigated to show the possibility of charge transport through DNA-QDs assembly for the application of optoelectronic devices.

Download or read book Semiconductor Nanostructures for Optoelectronic Applications written by Todd D. Steiner and published by Artech House. This book was released on 2004 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Tiny structures measurable on the nanometer scale (one-billionth of a meter) are known as nanostructures, and nanotechnology is the emerging application of these nanostructures into useful nanoscale devices. As we enter the 21st century, more and more professional are using nanotechnology to create semiconductors for a variety of applications, including communications, information technology, medical, and transportation devices. Written by today's best researchers of semiconductor nanostructures, this cutting-edge resource provides a snapshot of this exciting and fast-changing field. The book covers the latest advances in nanotechnology and discusses the applications of nanostructures to optoelectronics, photonics, and electronics.

Download or read book 21st Century Nanostructured Materials written by Phuong Pham and published by BoD – Books on Demand. This book was released on 2022-04-20 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured materials (NMs) are attracting interest as low-dimensional materials in the high-tech era of the 21st century. Recently, nanomaterials have experienced breakthroughs in synthesis and industrial and biomedical applications. This book presents recent achievements related to NMs such as graphene, carbon nanotubes, plasmonic materials, metal nanowires, metal oxides, nanoparticles, metamaterials, nanofibers, and nanocomposites, along with their physical and chemical aspects. Additionally, the book discusses the potential uses of these nanomaterials in photodetectors, transistors, quantum technology, chemical sensors, energy storage, silk fibroin, composites, drug delivery, tissue engineering, and sustainable agriculture and environmental applications.

Download or read book 21st Century Nanoscience A Handbook written by Klaus D. Sattler and published by CRC Press. This book was released on 2020-04-22 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 21st Century Nanoscience Handbook will be the most comprehensive, up-to-date large reference work for the field of nanoscience. Handbook of Nanophysics by the same editor published in the fall of 2010 and was embraced as the first comprehensive reference to consider both fundamental and applied aspects of nanophysics. This follow-up project has been conceived as a necessary expansion and full update that considers the significant advances made in the field since 2010. It goes well beyond the physics as warranted by recent developments in the field. This ninth volume in a ten-volume set covers industiral applications. Key Features: Provides the most comprehensive, up-to-date large reference work for the field. Chapters written by international experts in the field. Emphasises presentation and real results and applications. This handbook distinguishes itself from other works by its breadth of coverage, readability and timely topics. The intended readership is very broad, from students and instructors to engineers, physicists, chemists, biologists, biomedical researchers, industry professionals, governmental scientists, and others whose work is impacted by nanotechnology. It will be an indispensable resource in academic, government, and industry libraries worldwide. The fields impacted by nanophysics extend from materials science and engineering to biotechnology, biomedical engineering, medicine, electrical engineering, pharmaceutical science, computer technology, aerospace engineering, mechanical engineering, food science, and beyond.

Download or read book Nanostructured and Advanced Materials for Applications in Sensor Optoelectronic and Photovoltaic Technology written by Ashok K. Vaseashta and published by Springer Science & Business Media. This book was released on 2007-04-29 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal aim of this NATO Advanced Study Institute (ASI) "Nanostructured and Advanced Materials for Applications in Sensor, Optoelectronic and Photovoltaic Technology" was to present a contemporary overview of the field of nanostructured and advanced electronic materials. Nanotechnology is an emerging scientific field receiving significant worldwide attention. On a nanometer scale, materials or structures may possess new and unique physical properties. Some of these are now known to the scientific community, but there may well be many properties not yet known to us, rendering it as a fascinating area of research and a suitable subject for a NATO ASI. Yet another aspect of the field is the possibility for creating meta-stable phases with unconventional properties and the ultra-miniaturization of current devices, sensors, and machines. Such nanotechnological and related advanced materials have an extremely wide range of potential applications, viz. nanoscale electronics, sensors, optoelectronics, photonics, nano-biological systems, na- medicine, energy storage systems, etc. This is a wide-ranging subject area and therefore requires the formation of multi-disciplinary teams of physicists, chemists, materials scientists, engineers, molecular biologists, pharmacologists, and others to work together on the synthesis and processing of materials and structures, the understanding of their physical properties, the design and fabrication of devices, etc. Hence, in formulating our ASI, we adopted an int- disciplinary approach, bringing together recognised experts in the various fields while retaining a level of treatment accessible to those active in specific individual areas of research and development.

Download or read book Peptide Self Assembly and Engineering written by Xuehai Yan and published by John Wiley & Sons. This book was released on 2024-02-09 with total page 933 pages. Available in PDF, EPUB and Kindle. Book excerpt: Peptide Self-Assembly and Engineering State-of-the-art research in peptide self-assembly, with coverage of fundamental aspects of how peptides self-assemble and an extensive number of applications Peptide Self-Assembly and Engineering: Fundamentals, Structures, and Applications (2V set) covers the latest progresses in the field of peptide self-assembly and engineering, including the fundamental principles of peptide self-assembly, new theory of nucleation and growth, thermodynamics and kinetics, materials design rules, and precisely controlled structures and unique functions. The broad contents from this book enable readers to obtain a systematical and comprehensive knowledge in the field of peptide self-assembly and engineering. Contributed by the leading scientists and edited by a highly qualified academic and an authority in the field, Peptide Self-Assembly and Engineering includes information on: Emerging areas in peptide assembly, such as immune agents, bioelectronics, energy conversion, flexible sensors, biomimetic catalysis, and more Existing applications in biomedical engineering, nanotechnology, and photoelectronics, including tissue engineering, drug delivery, and biosensing devices History of peptide self-assembly for design of functional materials and peptides’ unique mechanical, optical, electronic, and biological properties Various solvent conditions, such as pH, ionic strength, and polarity, that can affect the structure and stability of peptide assemblies A very comprehensive reference covering the latest progresses in the field of peptide self-assembly and engineering, Peptide Self-Assembly and Engineering is an essential resource for all scientists performing research intersecting with the subject, including biochemists, biotechnologists, pharmaceutical chemists, protein chemists, materials scientists, and medicinal chemists.

Download or read book Well Organized Inorganic Nanowire Films written by Jian-Wei Liu and published by Springer. This book was released on 2017-03-01 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the latest findings on macroscopic-scale nanowire thin films composed of integrated nanowires. It introduces readers to essential synthesis and assembly strategies for the design and fabrication of high-quality nanowire thin films, and discusses their underlying principles in detail. The book highlights examples specific to well-aligned nanowire systems, and explores the applications of nanowire systems, including memory devices, flexible transparent electrodes, etc. The book offers a valuable resource for researchers and graduate students working in materials science, especially in nanowire device fabrication.

Download or read book Self Organized Nanoscale Materials written by Motonari Adachi and published by Springer. This book was released on 2010-11-10 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: First to review nanoscale self-assembly employing such a wide variety of methods Covers a wide variety physical, chemical and biological systems, phenomena, and applications First overviews of nanotube biotechnology and bimetallic nanoparticles