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Synthesis and Characterization of Nanoporous Alumina Films and Their Application to Nanorod Array Fabrication

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Release : 2011
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Kind : eBook
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Book Synopsis Synthesis and Characterization of Nanoporous Alumina Films and Their Application to Nanorod Array Fabrication by : Negar Abolhassani Monfared

Download or read book Synthesis and Characterization of Nanoporous Alumina Films and Their Application to Nanorod Array Fabrication written by Negar Abolhassani Monfared. This book was released on 2011. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study is to synthesize and characterize the nanoporous structures that can be obtained by the anodization of thin film aluminum sputter deposited on a silicon wafer substrate. This study also investigated the application of nanoporous alumina to fabricate nanorod arrays by using preceramic polymers. Although there are many studies on the effect of anodizing conditions on anodized alumina, there are a few studies on anodizing of thin film aluminum. Anodized thin films of aluminum supported on silicon could have several applications that involve integrating the nanoporous structures into chemical and biological sensors and as templates for creating hierarchically complex nanostructures that are integrated with microelectronic circuits. In this study the different attributes of anodizing parameters in the synthesis of nanoporous structures on thin film aluminum compared to the results of studies on aluminum bulk is investigated. These differences can be due to attributes of the material, the resistance of the substrate and the reactions of substrate during anodizing. In this study the effects of different anodizing parameters and the contribution of each parameter were investigated using statistical approaches for quantification of pore sizes, their distributions and pore densities. This approach has never been previously used for studying the aluminum anodization. Until now, studies have always been based on average of the structure parameters with the hypothesis of homogeneity and uniformity of the structure which is not the case for anodization of thin film aluminum. To investigate the relative effect of each parameter, the Taguchi method and signal-to-noise calculation were applied. A new fabrication method for making nanorod arrays was introduced. In this method, nanoporous alumina was used as a casting mold for being filled by a preceramic polymer. KDT Ceraset polysilazane 20 (PSZ) and KDT Ceraset polyureasilazane (PUSZ) were two preceramic polymers which were selected for this purpose. To understand the changes in the chemical structure during the different steps of curing process of these preceramic polymers and also to find a better process for fabrication of nanorod arrays, the effect of curing conditions on these preceramic polymers were investigated.

Synthesis and Characterization of Nanoporous Alumina Membranes

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Release : 2015-12-30
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Kind : eBook
Book Rating : 809/5 ( reviews)

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Book Synopsis Synthesis and Characterization of Nanoporous Alumina Membranes by : Alaa Faid

Download or read book Synthesis and Characterization of Nanoporous Alumina Membranes written by Alaa Faid. This book was released on 2015-12-30. Available in PDF, EPUB and Kindle. Book excerpt: Porous alumina forms on the surface of aluminum in a self organized manner when anodized in an acid under specific conditions. Such templates have recently emerged as an important self-assembly method for nanofabrication.They can be used in different ways to synthesize self-assembled arrays of nanowires and nanodots of a variety of materials, such as metals, alloys, binary compounds, and multilayers. Characterization of these materials can easily be achieved by releasing the nanowires from the template. Magnetic, electric, transport, and optical measurements all contribute toward the exploration of the fundamental properties of nanostructured materials and point toward their technological potential. Alumina templates have high porosities. They can easily be prepared in the laboratory with good control over the size (length and diameter) of the pores. Under certain conditions, very good periodicity of the pore arrangement can also be obtained. Porous alumina templates can also withstand high temperatures, which may be necessary in some cases to anneal the deposited material.

Nanostructured Anodic Metal Oxides

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Release : 2020-03-27
Genre : Technology & Engineering
Kind : eBook
Book Rating : 773/5 ( reviews)

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Book Synopsis Nanostructured Anodic Metal Oxides by : Grzegorz D. Sulka

Download or read book Nanostructured Anodic Metal Oxides written by Grzegorz D. Sulka. This book was released on 2020-03-27. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured Anodic Metal Oxides: Synthesis and Applications reviews the current status of fabrication strategies that have been successfully developed to generate nanoporous, nanotubular and nanofibrous anodic oxides on a range of metals. The most recent achievements and innovative strategies for the synthesis of nanoporous aluminum oxide and nanotubular titanium oxide are discussed. However, a special emphasis is placed on the possibility of fabrication of nanostructured oxide layers with different morphologies on other metals, including aluminum titanium, tantalum, tin, zinc, zirconium and copper. In addition, emerging biomedical applications of synthesized materials are discussed in detail. During the past decade, great progress has been made both in the preparation and characterization of various nanomaterials and their functional applications. The anodization of metals has proven to be reliable for the synthesis of nanoporous, nanotubular and nanofibrous metal oxides to produce a desired diameter, density, aspect ratio (length to diameter) of pores/tubes, and internal pore/tube structure. Provides an in-depth overview of anodization techniques for a range of metals Explores the emerging applications of anodic metal oxides Explains mechanisms of formation valve metal oxides via anodization

Nanoporous Alumina

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Release : 2015-07-17
Genre : Technology & Engineering
Kind : eBook
Book Rating : 347/5 ( reviews)

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Book Synopsis Nanoporous Alumina by : Dusan Losic

Download or read book Nanoporous Alumina written by Dusan Losic. This book was released on 2015-07-17. Available in PDF, EPUB and Kindle. Book excerpt: This book gives detailed information about the fabrication, properties and applications of nanoporous alumina. Nanoporous anodic alumina prepared by low-cost, simple and scalable electrochemical anodization process due to its unique structure and properties have attracted several thousand publications across many disciplines including nanotechnology, materials science, engineering, optics, electronics and medicine. The book incorporates several themes starting from the understanding fundamental principles of the formation nanopores and theoretical models of the pore growth. The book then focuses on describing soft and hard modification techniques for surface and structural modification of pore structures to tailor specific sensing, transport and optical properties of nano porous alumina required for diverse applications. These broad applications including optical biosensing, electrochemical DNA biosensing, molecular separation, optofluidics and drug delivery are reviewed in separated book chapters. The book appeals to researchers, industry professionals and high-level students.

Advanced Functional Materials

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Release : 2015-05-14
Genre : Technology & Engineering
Kind : eBook
Book Rating : 995/5 ( reviews)

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Book Synopsis Advanced Functional Materials by : Ashutosh Tiwari

Download or read book Advanced Functional Materials written by Ashutosh Tiwari. This book was released on 2015-05-14. Available in PDF, EPUB and Kindle. Book excerpt: Because of their unique properties (size, shape, and surface functions), functional materials are gaining significant attention in the areas of energy conversion and storage, sensing, electronics, photonics, and biomedicine. Within the chapters of this book written by well-known researchers, one will find the range of methods that have been developed for preparation and functionalization of organic, inorganic and hybrid structures which are the necessary building blocks for the architecture of various advanced functional materials. The book discusses these innovative methodologies and research strategies, as well as provides a comprehensive and detailed overview of the cutting-edge research on the processing, properties and technology developments of advanced functional materials and their applications. Specifically, Advanced Functional Materials: Compiles the objectives related to functional materials and provides detailed reviews of fundamentals, novel production methods, and frontiers of functional materials, including metalic oxides, conducting polymers, carbon nanotubes, discotic liquid crystalline dimers, calixarenes, crown ethers, chitosan and graphene. Discusses the production and characterization of these materials, while mentioning recent approaches developed as well as their uses and applications for sensitive chemiresistors, optical and electronic materials, solar hydrogen generation, supercapacitors, display and organic light-emitting diodes, functional adsorbents, and antimicrobial and biocompatible layer formation. This volume in the Advanced Materials Book Series includes twelve chapters divided into two main areas: Part 1: Functional Metal Oxides: Architecture, Design and Applications and Part 2: Multifunctional Hybrid Materials: Fundamentals and Frontiers

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