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Study Of Growth Kinetics In One Dimensional And Two Dimensional Zno Nanostructures
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Book Synopsis Study of Growth Kinetics in One Dimensional and Two Dimensional ZnO Nanostructures by : Xin Yin
Download or read book Study of Growth Kinetics in One Dimensional and Two Dimensional ZnO Nanostructures written by Xin Yin and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the merits arising from the unique geometry, nanostructure materials have been an essential class of materials, which have shown great potentials in the fields of electronics, photonics, and biology. With various nanostructures being intensively investigated and successfully complemented into device applications, there has been one increasing demand to the investigation of the growth mechanism devoted to the controlled nanostructure synthesis. Motivated by this situation, this thesis is focused on the fundamental understanding of the nanostructure growth. Specifically, by taking zinc oxide as an example material, through controlling the basic driving force, that is, the supersaturation, I have rationally designed and synthesized various of nanostructures, and further applied the classical layer-by-layer growth mechanism to the understanding on the formation of these nanostructures, they are, the convex-plate-capped nanowires, the concave-plate-capped nanowires, the facet evolution at the tip of the nanowires, and the ultrathin 2D nanosheets.
Book Synopsis ZnO Nanostructures and Their Applications by : Sun Xiaowei
Download or read book ZnO Nanostructures and Their Applications written by Sun Xiaowei and published by CRC Press. This book was released on 2016-04-19 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the various functional properties and potential applications of one-dimensional ZnO nanostructures, from basic principles to our most recent discoveries. It comprises experimental analysis of various properties of ZnO nanostructures, preparation techniques, research methods, and some promising applications. The areas of focus i
Book Synopsis Wide Band Gap Semiconductor Nanowires 1 by : Vincent Consonni
Download or read book Wide Band Gap Semiconductor Nanowires 1 written by Vincent Consonni and published by John Wiley & Sons. This book was released on 2014-08-08 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: GaN and ZnO nanowires can by grown using a wide variety of methods from physical vapor deposition to wet chemistry for optical devices. This book starts by presenting the similarities and differences between GaN and ZnO materials, as well as the assets and current limitations of nanowires for their use in optical devices, including feasibility and perspectives. It then focuses on the nucleation and growth mechanisms of ZnO and GaN nanowires, grown by various chemical and physical methods. Finally, it describes the formation of nanowire heterostructures applied to optical devices.
Book Synopsis Experimental and Theoretical Study of Microstructure Effect on Piezoelectric Property of One Dimensional ZnO Nanostructures by : Kasra Momeni
Download or read book Experimental and Theoretical Study of Microstructure Effect on Piezoelectric Property of One Dimensional ZnO Nanostructures written by Kasra Momeni and published by . This book was released on 2011 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Self Assembled Semiconductor Nanostructures for Novel Devices in Photonics and Electronics by : Mohamed Henini
Download or read book Handbook of Self Assembled Semiconductor Nanostructures for Novel Devices in Photonics and Electronics written by Mohamed Henini and published by Elsevier. This book was released on 2011-07-28 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt: The self-assembled nanostructured materials described in this book offer a number of advantages over conventional material technologies in a wide range of sectors. World leaders in the field of self-organisation of nanostructures review the current status of research and development in the field, and give an account of the formation, properties, and self-organisation of semiconductor nanostructures. Chapters on structural, electronic and optical properties, and devices based on self-organised nanostructures are also included. Future research work on self-assembled nanostructures will connect diverse areas of material science, physics, chemistry, electronics and optoelectronics. This book will provide an excellent starting point for workers entering the field and a useful reference to the nanostructured materials research community. It will be useful to any scientist who is involved in nanotechnology and those wishing to gain a view of what is possible with modern fabrication technology. Mohamed Henini is a Professor of Applied Physics at the University of Nottingham. He has authored and co-authored over 750 papers in international journals and conference proceedings and is the founder of two international conferences. He is the Editor-in-Chief of Microelectronics Journal and has edited three previous Elsevier books. Contributors are world leaders in the field Brings together all the factors which are essential in self-organisation of quantum nanostructures Reviews the current status of research and development in self-organised nanostructured materials Provides a ready source of information on a wide range of topics Useful to any scientist who is involved in nanotechnology Excellent starting point for workers entering the field Serves as an excellent reference manual
Book Synopsis Fabrication and Characterization of One Dimensional ZnO Nanostructures by :
Download or read book Fabrication and Characterization of One Dimensional ZnO Nanostructures written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: HKUST Call Number: Thesis NSNT 2009 Cheng.
Book Synopsis 21st Century Nanoscience – A Handbook by : Klaus D. Sattler
Download or read book 21st Century Nanoscience – A Handbook written by Klaus D. Sattler and published by CRC Press. This book was released on 2019-11-26 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date reference is the most comprehensive summary of the field of nanoscience and its applications. It begins with fundamental properties at the nanoscale and then goes well beyond into the practical aspects of the design, synthesis, and use of nanomaterials in various industries. It emphasizes the vast strides made in the field over the past decade – the chapters focus on new, promising directions as well as emerging theoretical and experimental methods. The contents incorporate experimental data and graphs where appropriate, as well as supporting tables and figures with a tutorial approach.
Download or read book Nanowires written by Simas Rackauskas and published by BoD – Books on Demand. This book was released on 2019-04-10 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanowires are attracting wide scientific interest due to the unique properties associated with their one-dimensional geometry. Developments in the understanding of the fundamental principles of the nanowire growth mechanisms and mastering functionalization provide tools to control crystal structure, morphology, and the interactions at the material interface, and create characteristics that are superior to those of planar geometries. This book provides a comprehensive overview of the most important developments in the field of nanowires, starting from their synthesis, discussing properties, and finalizing with nanowire applications. The book consists of two parts: the first is devoted to the synthesis of nanowires and characterization, and the second investigates the properties of nanowires and their applications in future devices.
Book Synopsis Synthesis, Characterization and Environmental Applications of ZnO Based Nanostructures by : Yangsi Liu
Download or read book Synthesis, Characterization and Environmental Applications of ZnO Based Nanostructures written by Yangsi Liu and published by . This book was released on 2014 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: ZnO nanostructures have drawn a great attention from researchers worldwide for their unique chemical, physical, electrical, and optical properties in the recent years. One of the biggest advantages of ZnO is that it can be synthesized by a variety of methods, which also results in the richest family of its nanostructures with various dimensions among all materials. As an important metal oxide semiconductor, the nanostructured ZnO materials have been considered as the promising building blocks for nanodevices for a broad range of applications in catalysis, electronics and photonics. Therefore, realizing ZnO based materials with desired nanostructure and enhanced performance is essential in the research and applications of ZnO. The research reported in this thesis is mainly focused on the development of ZnO based nanostructures by facile and economic approaches, the analysis of their compositional, structural, and functional properties, the understanding of growth and behaviour mechanism of these nanostructures, and the study of their performance in environmental applications. Several characterization techniques, such as scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), high resolution transmission electron microscope (HRTEM), Raman scattering, photoluminescence (PL) emission and Ultraviolet-visible light (UV-vis) spectra, have been applied in this research to verify the morphology, microstructure, chemical composition, growth process, crystal structure, defects and optical properties of various ZnO based nanostructures. One dimensional (1D) ZnO nanorod arrays were grown on glass substrates with ZnO seeds via a low temperature and ambient atmosphere hydrothermal method. The concentration of precursors can change the aspect ratio, surface roughness and the band gap energy of the nanorods. They were applied in the degradation of estrone, and the hydrogen peroxide (H2O2) formed during photocatalysis process was detected by fluorescence analysis. The results revealed that the ZnO nanorod array produced from 25 mM reactants had the highest aspect ratio, the largest surface roughness, the lowest band gap energy, and a suitable rod gap distance, favouring the UV light utilization, photocatalytic degradation and H2O2 generation. The pH value of the solution has a significant effect on the growth behaviour and morphology of ZnO nanorods. The crystal size and the alignment of ZnO nanorods grown from neutral (pH = 7) and acid (pH = 5) conditions were distinctly different although both of them had hexagonal wurtzite phase. The pH can adjust the chemical reactions direction, influence the extent of nucleation and crystal growth by varying the degree of supersaturation, and also tailor the distribution and orientation of ZnO nuclei, thereby having a great effect on the crystal size and the alignment of ZnO nanorods. Complex three dimensional (3D) ZnO trunk-branch nanostructures immobilized on glass substrates were achieved by a multi-step growth method without any capping agents. The process included the magnetron sputtering and hydrothermal growth. Both the large primal trunks and small branches were single crystal grown along [0001] direction. This hierarchical ZnO nanostructures with additional active surface, improved light harvesting and a large amount of defects exhibited better photocatalytic efficiency in degradation of rhodamine B (RhB) than nonbranched samples. ZnO nanorod arrays were combined with Ag to study their photocatalytic activity under visible light. The Ag/ZnO heterostructures were realized by photoreduction in various reducing mediums. In the air, only a small amount of Ag nanoribbons was reduced. Ag nanosheets and nanoparticles produced in water to form a nano (sheet-rod-particle) multilevel structure with the ZnO nanorods. A large amount of Ag nanoclusters were embedded in the ZnO nanorod arrays in the water mixed with ethanol. The Ag component stimulated the surface phonon resonance, which is the root cause for the visible light driven photocatalysis. The effect of quantity and dispersion of Ag nanostructures on the optical properties, and the photocatalytic behaviour of Ag/ZnO heterostructures was investigated. Time-affected wettability was compared among the TiO2/ZnO nanocomposite, ZnO/ZnO bi-level nanostructure and ZnO nanorod arrays by measuring the water contact angles on their surfaces. In ambient conditions, their surfaces transformed spontaneously from hydrophilic to hydrophobic during a long time storage. The replacement of initial surface hydroxyl groups by oxygen atoms and the adsorption of organic contaminants in the air would be the main reasons for such a conversion. The influence of morphological features and surface chemical components on the wettability change rate was discussed. In the last part of this thesis, conclusions and future works are addressed according to the synthesis, characterization and application results.
Book Synopsis Three-Dimensional Zinc Oxide Nanostructure Synthesis and Photonic Applications by : Jimmy Yao
Download or read book Three-Dimensional Zinc Oxide Nanostructure Synthesis and Photonic Applications written by Jimmy Yao and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to investigate zinc oxide (ZnO)-based photonic nanostructure fabrications and their applications to solar energy. In the first section, a three-dimensional (3-D) ZnO nanoforest with large surface areas and good electron transport properties has been synthesized successfully by a two--step hydrothermal process and applied to the photoelectrode for a dye-sensitized solar cell (DSSC). The experimental results show that the solar conversion efficiency of the 3-D ZnO nanoforest is much higher than that of one-dimensional (1-D) ZnO nanorod arrays owing to its much larger surface areas. In the second section, zinc oxide/titanium dioxide (ZnO/TiO2) nanocomposite photoelectrodes for DSSC with density-controlled capability are presented. A high open-circuit voltage of up to 0.93 V was successfully achieved. To the best of the author's knowledge, this is the highest open--circuit voltage reported in the literature; this is beneficial for achieving a high-efficiency DSSC. The physical mechanism of high open-circuit voltage has been demonstrated and confirmed by electrochemical impedance spectroscopy; a reduced recombination loss was achieved with an improved charge carrier diffusion path. In addition, ZnO/TiO2 nanocomposite photoelectrodes have proven to further improve solar conversion efficiency as compared to conventional TiO2 nanoparticles photoelectrodes. In total, several future research topics that could benefit from the analysis in this dissertation have been examined.Although the development of ZnO nanostructures has been studied extensively by various synthesis methods in the past decade, this dissertation is focused on the practical aspect of synthesizing ZnO nanostructures on transparent conductive oxide substrates directly for the application of dye-sensitized solar cells in a low-cost manner. The dissertation is divided into six chapters and the contents of every chapter is briefly introduced as follows. Chapter 1 introduces the motivation of the dissertation. Chapter 2 presents the synthesis and characterization of ZnO nanostructures for one-dimensional (1-D) and three-dimensional (3-D) systems. 1-D ZnO nanostructures--ZnO nanowires--were delivered by a rapid growth microwave-assisted vapor--liquid--solid method. 3-D ZnO hierarchical nanostructures--ZnO nanoforest--were synthesized via a cost-effective hydrothermal method. The obtained ZnO nanoforest has the potential to break through the limitation of the surface areas of DSSC. Chapter 3 presents the synthesis and characterization of ZnO/TiO2 composite nanostructures. The discussions were focused on the density-controlled capability of ZnO nanorod arrays and the conformal shell coating of ZnO--TiO2 core--shell nanostructures which have the feasibility to provide a direct electron transport pathway for conventional TiO2 nanoparticles DSSC. Chapter 4 investigates the DSSC performances from ZnO nanoforest photoelectrodes and ZnO/TiO2 nanocomposite photoelectrodes. Moreover, a high open-circuit voltage is reported and the physical mechanism is discussed and verified with electrochemical impedance spectroscopy. Furthermore, the overall solar conversion efficiency can be improved by this nanocomposite photoelectrode.In addition, radiation detection has been investigated during my Ph.D. studies. Chapter 5 demonstrates the standoff alpha radiation detection technique based on the physical mechanism of excited state absorption of air molecules. Both theoretical analysis and experimental verifications were conducted. The experimental results confirmed that the radiation could be detected at a 10 m standoff distance.Chapter 6 summarizes the dissertation with two developed photoelectrodes with the improvement of surface areas and electron transport property for a high solar conversion efficiency of DSSC and proposes potential future works regarding to further enhanced the efficiency.
Book Synopsis Trends In Chemistry Of Materials: Selected Research Papers Of C N R Rao by : C N R Rao
Download or read book Trends In Chemistry Of Materials: Selected Research Papers Of C N R Rao written by C N R Rao and published by World Scientific. This book was released on 2008-07-21 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this collection, the author has compiled a set of his papers representing some of the highlights of materials chemistry. It features a section on oxidic materials, which includes high-temperature superconductivity, colossal magnetoresistance, electronic phase separation and multiferroics. The author has also included novel methods for making gallium nitride, boron nitride and such materials, by using precursors and the urea decomposition route. Moreover, there is a section dealing with open-framework and hybrid materials of which the latter has a great future since one can make use of the rigidity of inorganic structures and the functionality and flexibility of the organic residues to design materials with novel properties.
Book Synopsis Zinc Oxide Nanostructures by : Magnus Willander
Download or read book Zinc Oxide Nanostructures written by Magnus Willander and published by CRC Press. This book was released on 2014-07-22 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) in its nanostructured form is emerging as a promising material with great potential for the development of many smart electronic devices. This book presents up-to-date information about various synthesis methods to obtain device-quality ZnO nanostructures. It describes both high-temperature (over 100 C) and low-temperature (under
Book Synopsis Handbook of Innovative Nanomaterials by : Xiaosheng Fang
Download or read book Handbook of Innovative Nanomaterials written by Xiaosheng Fang and published by CRC Press. This book was released on 2012-07-05 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays, not only is the research on nanoscale is among the most active fields in current science, but it is also being gradually introduced into our daily lives. The purpose of this book is to provide the readers with a comprehensive review of the state-of-the-art research activities in the field of innovative nanomaterials. This book is a compre
Book Synopsis One-Dimensional nanostructures by : Zhenyu Li
Download or read book One-Dimensional nanostructures written by Zhenyu Li and published by Springer Science & Business Media. This book was released on 2013-03-21 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: One-Dimensional Nanostructures: Electrospinning Technique and Unique Nanofibers is a comprehensive book depicting the electrospinning technique and related 1D unique electrospun nanofibers. The first part of the book focuses on electrospinning technique, with chapters describing Electrospinning setup, electrospinning theories, and related working parameter. The second part of the book describes in detail specific topics on how to control the electrospun fiber properties such as how to control the fiber direction, how to control the fiber surface morphology, how to control the fiber structure, and how to construct 3D structures by electrospun fibers. The final part of the book depicts the applications of the electrospun nanofibers, with sections describing in detail specific fields such as electrospun nanofiber reinforcement, filtration, electronic devices, lithium-ion batteries, fuel cells, biomedical field, and so on. One-Dimensional Nanostructures: Electrospinning Technique and Unique Nanofibers is designed to bring state-of-the-art on electrospinning together into a single book and will be valuable resource for scientists in the electrospinning field and other scientists involved in biomedical field, mechanical field, materials, and energy field. Dr. Zhenyu Li is an associate professor at the Dept. of Chemistry, Jilin University, Changchun, P. R. China. Currently, he also holds the position in Australian Future Fibres Research & Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, Victoria, Australia. Dr. Ce Wang is a professor at the Dept. of Chemistry, Jilin University, Changchun, P. R. China.
Book Synopsis Novel Materials for Environmental Remediation Applications by : Dimitrios A Giannakoudakis
Download or read book Novel Materials for Environmental Remediation Applications written by Dimitrios A Giannakoudakis and published by Elsevier. This book was released on 2022-10-01 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: Novel Materials for Environmental Remediation Applications: Adsorption and Beyond presents detailed, comprehensive coverage of novel and advanced materials that can be applied to address the growing global concern of the pollution of natural resources in water, the air, and in soil. The book provides up-to-date knowledge of state-of-the-art materials and treatment processes, as well as details of applications, including adsorptive remediation and catalytic remediation. Chapters include the characteristics of materials, basic and important physicochemical features for environmental remediation applications, routes of synthesis, recent advances as remediation medias and future perspectives. This book offers an interdisciplinary and practical examination of novel materials and processes for environmental remediation that will be valuable to environmental scientists, materials scientists, environmental chemists, and environmental engineers alike. Highlights a wide range of synthetic methodologies, physicochemical and engineered features of novel materials, and composites/hybrids for environmental purposes Presents applications of adsorbents or catalysts for water/wastewater treatment and air purification technologies such as advanced oxidation processes, adsorption, photocatalysis, coagulation, flotation, membrane separation, filtration, and others Provides comprehensive, consolidated coverage of novel materials for environmental remediation applications for researchers in environmental science, materials science, and industry to identify in-depth solutions to pollution
Book Synopsis Two-Dimensional Nanostructures by : Mahmood Aliofkhazraei
Download or read book Two-Dimensional Nanostructures written by Mahmood Aliofkhazraei and published by CRC Press. This book was released on 2012-05-02 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: After the 2010 Nobel Prize in Physics was awarded to Andre Geim and Konstantin Novoselov "for groundbreaking experiments regarding the two-dimensional material graphene," even more research and development efforts have been focused on two-dimensional nanostructures. Illustrating the importance of this area in future applications, Two-Dimensional Nanostructures covers the fabrication methods and properties of these materials. The authors begin with discussions on the properties, size effect, applications, classification groups, and growth of nanostructures. They then describe various characterization and fabrication methods, such as spectrometry, low-energy electron diffraction, physical and chemical vapor deposition, and molecular beam epitaxy. The remainder of the text focuses on mechanical, chemical, and physical properties and fabrication methods, including a new mechanical method for fabricating graphene layers and a model for relating the features and structures of nanostructured thin films. With companies already demonstrating the capabilities of graphene in a flexible touch-screen and a 150 GHz transistor, nanostructures are on their way to replacing silicon as the materials of choice in electronics and other areas. This book aids you in understanding the current chemical, mechanical, and physical processes for producing these "miracle materials."
Book Synopsis Mass Transport of Nanocarriers by : Rita Elena Serda
Download or read book Mass Transport of Nanocarriers written by Rita Elena Serda and published by CRC Press. This book was released on 2016-04-19 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes barriers from the macro to the nanoscale, starting with endothelial and mucosal barriers, and ending with cellular organelles. Experimental approaches to track nanoparticles in vitro and in vivo are presented, as well as the ability to tailor-make nanoparticles for specific functions. Several model types of nanoparticles are pre
