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| Author | : Raquel Palacios Higueras |
| Publisher | : |
| Total Pages | : 173 |
| Release | : 2010 |
| Genre | : |
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| Total Pages | : 0 |
| Release | : 1997 |
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The template-synthetic method is a general approach for preparing tubular micro- and nanostructures. This method has been used to prepare micro- and nanostructures composed of metals, carbons, semiconductors, polymers, and Li+ -intercalation materials. This paper describes the use of the template method to prepare composite tubular micro- and nanostructures. These composite structures consist of an outer tubule of one material surrounding inner tubules of different materials. Chemical strategies used to prepare these composite tubular structures include electroless deposition of Au; electropolymerization of conductive and insulating polymers; electrodeposition of metals and semiconductors; graphitization of polymer precursors; chemical vapor deposition synthesis; and sol-gel synthesis.
| Author | : Cosmin Laslau |
| Publisher | : |
| Total Pages | : 156 |
| Release | : 2012 |
| Genre | : Conducting polymers |
| ISBN | : |
"To develop devices based on conducting polymers for the benefit of humanity - such as, for example, artificial muscles and lab-on-a-chip diagnostics - we require the ability to reliably fabricate and understand these materials at the micro and nano scales. In this thesis I present research towards that goal, by developing novel experimental techniques for the fabrication and characterization of poly(3,4-ethylenedioxythiophene) (PEDOT) and polyaniline (PANI), two prominent conducting polymers. Many of the strategies presented herein are based on miniaturized pipettes driven by scanning ion conductance microscopy (SICM), with some complementary techniques also explored. I begin this thesis work by describing the construction of a low-cost SICM, and its further development to include novel modifications that enable its application to conducting polymers. One of these is the first SICM-based measurement of the ion flux that underpins PEDOT actuation, an important issue in artificial muscles and micropumps. Another is the first electrochemical fabrication of microscale PEDOT and PANI structures and arrays. This approach is then extended to map the activity of the resulting microstructures using modified SICM-based protocols. For example, it is demonstrated that pipette-defined cyclic voltammetry can yield highly localized characterization of microstructures, an important topic for biosensor applications. Indeed, this technique is demonstrated herein for the characterization of a PEDOT nanowire based DNA sensor. Finally, complementary studies on PANI nanostructures are also presented. The first synchrotron radiation studies of PANI nanotube self-assembly is undertaken, revealing crystallinity at critical early stages of the reaction. Furthermore, focused ion beam and electron microscopy techniques are used to perform studies on the electrical properties on individual PANI nanostructures. Both of these have relevance for potential integration with the aforementioned SICM-based techniques. Altogether, these methodological innovations and resulting findings represent significant advances in the burgeoning field of pipette-localized conducting polymer fabrication and characterization. I conclude the thesis with implications discussed for future fundamental research and device applications".
| Author | : |
| Publisher | : |
| Total Pages | : 98 |
| Release | : 2014 |
| Genre | : |
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The objective of this thesis is finding and developing fabrication methods to provide background techniques for potential applications with nanomaterials. The inclined UV lithography has announced to make three-dimensional fabrication process. With a movable stage, complex structures were achieved but difference of the refractive index, design of the final structures were limited. Refractive index matching medium between the substrate and the light source could reduce the refractive indices between the polymer and the substrate successfully. Nanoporous structures fabricated by multibeam interference lithography shows limitation of the usage since its periodicity. By insertion of the lift off resist layer between the patterned layer and the substrate, final photonic crystal structures could be partially removed for its own purpose and it provide potential application in the future. Two-step processing, combining with reactive ion etching system, nanoporous structures were on various substrates such as silicon and Polydimethylsiloxane. Photonic crystal template anodic aluminum oxide process has been described too. Large optical activity at visible wavelengths are of great attention in photonics. Dramatic enhancement of the optical activity of chiral poly(fluorene-alt-benzothiadiazole) with photoresist was demonstrated and successive photo patterning of chiral polymer shows the potential usage of this material for the photonics applications. Two photon lithography also used to pattern a photoresist-chiral polymer mixture into planar shapes and enhanced chirality can be realized by tuning the wavelength-dependent chiral response at both the molecular and geometric level. Near infrared light induced photopolymerization in-situ was demonstrated which can be applied everywhere where ultraviolet-polymerization is employed such as dentistry, coating industry. Use of the ultraviolet upconverting nanoparticles doped into the polymer, we show that expensive femtosecond pulsed lasers can be replace with relatively cheap 980 nm laser diodes.
| Author | : Rajesh Kumar Verma |
| Publisher | : CRC Press |
| Total Pages | : 453 |
| Release | : 2023-09-11 |
| Genre | : Technology & Engineering |
| ISBN | : 1000952215 |
Polymer Nanocomposites: Fabrication to Applications offers readers an up-to-date interpretation of various polymeric nanocomposite materials and technologies via critical reviews. It covers developments and advancements in various nanomaterials, polymeric materials, biopolymers, and processes. It initiates from nanomaterial synthesis, fabrication, and characterization to the manufacturing aspect and feasible product applications of polymer-based nanocomposites. The prime focus is on polymer matrix nanocomposites and their future trends in the engineering sector. Features: Explores synthesis, characterization, properties, fabrication/processing, and applications of polymer nanocomposite materials Elaborates on polymer manufacturing phase challenges using various control methods and statistical tools and modules Includes machining and micro (μ) machining investigation on the polymer nanocomposites Discusses modeling, simulation, and optimization of process parameters during the machining processes and applications of additive manufacturing Comprehends the significance of nanomaterials functionalizing synthetic fibrous and biocompatible composites This book is aimed at researchers and graduate students in mechanical engineering, materials science, polymers, composites, and nanomaterials.
| Author | : Stoyko Fakirov |
| Publisher | : Springer |
| Total Pages | : 399 |
| Release | : 2016-09-01 |
| Genre | : Technology & Engineering |
| ISBN | : 331939715X |
This book details all current techniques for converting bulk polymers into nano-size materials. The authors highlight various physical and chemical approaches for preparation of nano-size polymers. They describe the properties of these materials and their extensive potential commercial applications.
| Author | : Srabanti Ghosh |
| Publisher | : John Wiley & Sons |
| Total Pages | : 38 |
| Release | : 2021-06-01 |
| Genre | : Technology & Engineering |
| ISBN | : 3527345574 |
A timely overview of fundamental and advanced topics of conjugated polymer nanostructures Conjugated Polymer Nanostructures for Energy Conversion and Storage Applications is a comprehensive reference on conjugated polymers for energy applications. Distinguished academic and editor Srabanti Ghosh offers readers a broad overview of the synthesis, characterization, and energy-related applications of nanostructures based on conjugated polymers. The book includes novel approaches and presents an interdisciplinary perspective rooted in the interfacing of polymer and synthetic chemistry, materials science, organic chemistry, and analytical chemistry. This book provides complete descriptions of conjugated polymer nanostructures and polymer-based hybrid materials for energy conversion, water splitting, and the degradation of organic pollutants. Photovoltaics, solar cells, and energy storage devices such as supercapacitors, lithium ion battery electrodes, and their associated technologies are discussed, as well. Conjugated Polymer Nanostructures for Energy Conversion and Storage Applications covers both the fundamental topics and the most recent advances in this rapidly developing area, including: The design and characterization of conjugated polymer nanostructures, including the template-free and chemical synthesis of polymer nanostructures Conjugated polymer nanostructures for solar energy conversion and environmental protection, including the use of conjugated polymer-based nanocomposites as photocatalysts Conjugated polymer nanostructures for energy storage, including the use of nanocomposites as electrode materials The presentation of different and novel methods of utilizing conjugated polymer nanostructures for energy applications Perfect for materials scientists, polymer chemists, and physical chemists, Conjugated Polymer Nanostructures for Energy Conversion and Storage Applications also belongs on the bookshelves of organic chemists and any other practicing researchers, academics, or professionals whose work touches on these highly versatile and useful structures.
| Author | : Aránzazu del Campo |
| Publisher | : John Wiley & Sons |
| Total Pages | : 562 |
| Release | : 2011-04-08 |
| Genre | : Technology & Engineering |
| ISBN | : 3527633464 |
New micro and nanopatterning technologies have been developed in the last years as less costly and more flexible alternatives to phtolithograpic processing. These technologies have not only impacted on recent developments in microelectronics, but also in emerging fields such as disposable biosensors, scaffolds for tissue engineering, non-biofouling coatings, high adherence devices, or photonic structures for the visible spectrum. This handbook presents the current processing methods suitable for the fabrication of micro- and nanostructured surfaces made out of polymeric materials. It covers the steps and materials involved, the resulting structures, and is rounded off by a part on applications. As a result, chemists, material scientists, and physicists gain a critical understanding of this topic at an early stage of its development.
| Author | : Roel Gronheid |
| Publisher | : Woodhead Publishing |
| Total Pages | : 328 |
| Release | : 2015-07-17 |
| Genre | : Technology & Engineering |
| ISBN | : 0081002610 |
The directed self-assembly (DSA) method of patterning for microelectronics uses polymer phase-separation to generate features of less than 20nm, with the positions of self-assembling materials externally guided into the desired pattern. Directed self-assembly of Block Co-polymers for Nano-manufacturing reviews the design, production, applications and future developments needed to facilitate the widescale adoption of this promising technology. Beginning with a solid overview of the physics and chemistry of block copolymer (BCP) materials, Part 1 covers the synthesis of new materials and new processing methods for DSA. Part 2 then goes on to outline the key modelling and characterization principles of DSA, reviewing templates and patterning using topographical and chemically modified surfaces, line edge roughness and dimensional control, x-ray scattering for characterization, and nanoscale driven assembly. Finally, Part 3 discusses application areas and related issues for DSA in nano-manufacturing, including for basic logic circuit design, the inverse DSA problem, design decomposition and the modelling and analysis of large scale, template self-assembly manufacturing techniques. Authoritative outlining of theoretical principles and modeling techniques to give a thorough introdution to the topic Discusses a broad range of practical applications for directed self-assembly in nano-manufacturing Highlights the importance of this technology to both the present and future of nano-manufacturing by exploring its potential use in a range of fields
| Author | : Robert A. Shanks |
| Publisher | : Elsevier Inc. Chapters |
| Total Pages | : 31 |
| Release | : 2013-11-28 |
| Genre | : Technology & Engineering |
| ISBN | : 0128090790 |
Many nanostructured materials have been and are being prepared with increasing control over molecular configurations, conformations, and supramolecular assembly. These nanomaterials place an increasing challenge for characterization techniques to confirm the proposed structure and morphology. Several techniques are widely available, with increasing degrees of sophistication. Ideal techniques are those where the natural scale of the technique, such as radiation wavelength, matches that of the size scale of features in the material. In the case of nanostructured polymer blends the features are dispersed polymer phases, filler particles, and interphases. Immediately electron microscopies and X-ray techniques are apparent. Adaptions of these and related techniques extend their capabilities for the nano range. In addition to experimental observations, methods for quantifying the images or data are needed for comparison between materials and modeling via theoretical equations, which in the limit may become molecular modeling. As needs arise instruments have been improved in detection, resolution, accuracy, and precision. Development of any nanomaterial requires support from a suite of increasingly capable instrumentation. This review concentrates on techniques that directly probe nanostructures with mention of related techniques that apply to any dimension scale, though provide important secondary data.
