Download or read book Structural Control of Mixed Ionic and Electronic Transport in Conducting Polymers written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate), PEDOT:PSS, has been utilized for over two decades as a stable, solution-processable hole conductor. While its hole transport properties have been the subject of intense investigation, recent work has turned to PEDOT:PSS as a mixed ionic/electronic conductor in applications including bioelectronics, energy storage and management, and soft robotics. Conducting polymers can efficiently transport both holes and ions when sufficiently hydrated, however, little is known about the role of morphology on mixed conduction. Here, we show that bulk ionic and electronic mobilities are simultaneously affected by processing-induced changes in nano- and meso-scale structure in PEDOT:PSS films. We quantify domain composition, and find that domain purification on addition of dispersion co-solvents limits ion mobility, even while electronic conductivity improves. We show that an optimal morphology allows for the balanced ionic and electronic transport that is critical for prototypical mixed conductor devices. As a result, these findings may pave the way for the rational design of polymeric materials and processing routes to enhance devices reliant on mixed conduction.

Download or read book Mixed ionic and Electronic Conductivity in Polymers written by and published by . This book was released on 1991 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim in this portion of the research is to prepare new electroactive films with high ion mobility, and to characterize the transport properties of these materials. The classic conducting polymers, polyacetylene, polythiophene, and polypyrrole have dense structures that prevent rapid redox switching because of the low diffusivity of ions. The objective is to modify the last two polymers with pendant polyethers, which should greatly improve ion transport.

Download or read book Ionic and Electronic Transport in Conducting Polymer Systems written by Yongjun Wang and published by ProQuest. This book was released on 2008 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Conducting Polymers Fourth Edition 2 Volume Set written by John R. Reynolds and published by CRC Press. This book was released on 2019-11-14 with total page 1488 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last 10 years there have been major advances in fundamental understanding and applications and a vast portfolio of new polymer structures with unique and tailored properties was developed. Work moved from a chemical repeat unit structure to one more based on structural control, new polymerization methodologies, properties, processing, and applications. The 4th Edition takes this into account and will be completely rewritten and reorganized, focusing on spin coating, spray coating, blade/slot die coating, layer-by-layer assembly, and fiber spinning methods; property characterizations of redox, interfacial, electrical, and optical phenomena; and commercial applications.

Download or read book Mixed ionic and Electronic Conductivity in Polymers Annual Technical Progress Report written by and published by . This book was released on 1991 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim in this portion of the research is to prepare new electroactive films with high ion mobility, and to characterize the transport properties of these materials. The classic conducting polymers, polyacetylene, polythiophene, and polypyrrole have dense structures that prevent rapid redox switching because of the low diffusivity of ions. The objective is to modify the last two polymers with pendant polyethers, which should greatly improve ion transport.

Download or read book Understanding and Engineering Ion Transport in Conducting Polymers written by Eleni Stavrinidou and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many organic electronic and bioelectronics devices rely on mixed (electronic and ionic) transport within a single organic layer. Although electronic transport in these materials is relatively well understood, a fundamental understanding of ion transport is missing. I developed a simple analytical model that describes ion transport in a planar junction between an electrolyte and a conducting polymer film. The model leads to predictions of the temporal evolution of drift length of ions and current. These predictions are validated by numerical simulations and by using realistic parameters, I show that the analytical model can be used to obtain the ion mobility in the film. Furthermore, I developed an experimental method which allows the application of the analytical model and leads to a straightforward estimation of the ion drift mobilities in conducting polymers. PEDOT:PSS was found to support efficient transport of common ions, consistent with extensive swelling of the film in water. Crosslinking the film decreased its swelling and the ion mobility. Understanding the high correlation of hydration and ionic conductivity enables us to engineer materials with high and defined ion mobilities. As an example tuning of ion mobility by adjusting the relative ratio of the hydroscopic phase to PEDOT:TOS is presented. Finally I performed electrochemical impedance spectroscopy during a moving front experiment, in order to give a physical interpretation of the impedance spectra at a conducting polymer/electrolyte junction.

Download or read book Application for Continuation of Mixed Ionic and Electronic Conductivity in Polymers written by and published by . This book was released on 1990 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim in this portion of the research is to prepare new electroactive films with high ion mobility, and to characterize the transport properties of these materials. The classic conducting polymers, polyacetylene, polythiophene, and polypyrrole have dense structures that prevent rapid redox switching because of the low diffusivity of ions. The objective is to modify the last two polymers with pendant polyethers, which should greatly improve ion transport.

Download or read book Conjugated Polymers written by John R. Reynolds and published by CRC Press. This book was released on 2019-03-25 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers properties, processing, and applications of conducting polymers. It discusses properties and characterization, including photophysics and transport. It then moves to processing and morphology of conducting polymers, covering such topics as printing, thermal processing, morphology evolution, conducting polymer composites, thin films

Download or read book Controlling Ion Transport Pathways in Polymer Mixed Ion electron Conducting Devices written by Tamanna Tasneem Khan and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed ionic and electronic transport in organic materials is being explored in a wide range of technologies from bioelectronics to energy applications. Their performance critically relies on the interaction of ion channels with conjugated molecules responsible for charge transport. This raises the question whether ion transport can be separated and controlled through film architecture and thus control charge transport as well. Here, differential surface energies between polyelectrolyte components are used to create a nanoscale hydrophilic channel in a mixed conduction thin film device. This channel concentrates ion transport into an ion super-highway with the ion mobility measured to be nearly an order of magnitude higher than previous measurements in similar films. Ion access to this interfacial channel is, furthermore, gated through local surface energy, where gate materials of increasing hydrophobicity drive ions out of the channel, significantly hindering both ion and charge transport. This mechanism is further applied in a novel sensing device where UV-induced chemical changes local to the buried channel actively switches on the ion super highway due to the change in local surface energy. Understanding and controlling this mechanism via device architecture and polymer nanostructure will enable novel functionalities in future electronic, sensing, and medical applications.

Download or read book Optics of Conducting Polymer Thin Films and Nanostructures written by Shangzhi Chen and published by Linköping University Electronic Press. This book was released on 2021-02-19 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intrinsically conducting polymers forms a category of doped conjugated polymers that can conduct electricity. Since their discovery in the late 1970s, they have been widely applied in many fields, ranging from optoelectronic devices to biosensors. The most common type of conducting polymers is poly(3,4-ethylenedioxythiophene), or PEDOT. PEDOT has been popularly used as electrodes for solar cells or light-emitting diodes, as channels for organic electrochemical transistors, and as p-type legs for organic thermoelectric generators. Although many studies have been dedicated to PEDOT-based materials, there has been a lack of a unified model to describe their optical properties across different spectral ranges. In addition, the interesting optical properties of PEDOT-based materials, benefiting from its semi-metallic character, have only been rarely studied and utilized, and could potentially enable new applications. Plasmonics is a research field focusing on interactions between light and metals, such as the noble metals (gold and silver). It has enabled various opportunities in fundamental photonics as well as practical applications, varying from biosensors to colour displays. This thesis explores highly conducting polymers as alternatives to noble metals and as a new type of active plasmonic materials. Despite high degrees of microstructural disorder, conducting polymers can possess electrical conductivity approaching that of poor metals, with particularly high conductivity for PEDOT deposited via vapour phase polymerization (VPP). In this thesis, we systematically studied the optical and structural properties of VPP PEDOT thin films and their nanostructures for plasmonics and other optical applications. We employed ultra-wide spectral range ellipsometry to characterize thin VPP PEDOT films and proposed an anisotropic Drude-Lorentz model to describe their optical conductivity, covering the ultraviolet, visible, infrared, and terahertz ranges. Based on this model, PEDOT doped with tosylate (PEDOT:Tos) presented negative real permittivity in the near infrared range. While this indicated optical metallic character, the material also showed comparably large imaginary permittivity and associated losses. To better understand the VPP process, we carefully examined films with a collection of microstructural and spectroscopic characterization methods and found a vertical layer stratification in these polymer films. We unveiled the cause as related to unbalanced transport of polymerization precursors. By selection of suitable counterions, e.g., trifluoromethane sulfonate (OTf), and optimization of reaction conditions, we were able to obtain PEDOT films with electrical conductivity exceeding 5000 S/cm. In the near infrared range from 1 to 5 µm, these PEDOT:OTf films provided a well-defined plasmonic regime, characterized by negative real permittivity and lower magnitude imaginary component. Using a colloidal lithography-based approach, we managed to fabricate nanodisks of PEDOT:OTf and showed that they exhibited clear plasmonic absorption features. The experimental results matched theoretical calculations and numerical simulations. Benefiting from their mixed ionic-electronic conducting characters, such organic plasmonic materials possess redox-tunable properties that make them promising as tuneable optical nanoantennas for spatiotemporally dynamic systems. Finally, we presented a low-cost and efficient method to create structural colour surfaces and images based on UV-treated PEDOT films on metallic mirrors. The concept generates beautiful and vivid colours through-out the visible range utilizing a synergistic effect of simultaneously modulating polymer absorption and film thickness. The simplicity of the device structure, facile fabrication process, and tunability make this proof-of-concept device a potential candidate for future low-cost backlight-free displays and labels.

Download or read book Conducting Polymer Based Nanocomposites written by Ayesha Kausar and published by Elsevier. This book was released on 2021-04-22 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conducting Polymer-Based Nanocomposites: Fundamentals and Applications delivers an up-to-date overview on cutting-edge advancements in the field of nanocomposites derived from conjugated polymeric matrices. Design of conducting polymers and resultant nanocomposites has instigated significant addition in the field of modern nanoscience and technology. Recently, conducting polymer-based nanocomposites have attracted considerable academic and industrial research interest. The conductivity and physical properties of conjugated polymers have shown dramatic improvement with nanofiller addition. Appropriate fabrication strategies and the choice of a nanoreinforcement, along with a conducting matrix, may lead to enhanced physicochemical features and material performance. Substantial electrical conductivity, optical features, thermal stability, thermal conductivity, mechanical strength, and other physical properties of the conducting polymer-based nanocomposites have led to high-performance materials and high-tech devices and applications. This book begins with a widespread impression of state-of-the-art knowledge in indispensable features and processing of conducting polymer-based nanocomposites. It then discusses essential categories of conducting polymer-based nanocomposites such as polyaniline, polypyrrole, polythiophene, and derived nanomaterials. Subsequent sections of this book are related to the potential impact of conducting polymer-based nanocomposites in various technical fields. Significant application areas have been identified for anti-corrosion, EMI shielding, sensing, and energy device relevance. Finally, the book covers predictable challenges and future opportunities in the field of conjugated nanocomposites. - Integrates the fundamentals of conducting polymers and a range of multifunctional applications - Describes categories of essential conducting polymer-based nanocomposites for polyaniline, polypyrrole, polythiophene, and derivative materials - Assimilates the significance of multifunctional nanostructured materials of nanocomposite nanofibers - Portrays current and future demanding technological applications of conjugated polymer-based nanocomposites, including anti-corrosion coatings, EMI shielding, sensors, and energy production and storage devices

Download or read book Handbook of Carbon Nanotubes written by Jiji Abraham and published by Springer Nature. This book was released on 2022-11-16 with total page 2099 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Handbook covers the fundamentals of carbon nanotubes (CNT), their composites with different polymeric materials (both natural and synthetic) and their potential advanced applications. Three different parts dedicated to each of these aspects are provided, with chapters written by worldwide experts in the field. It provides in-depth information about this material serving as a reference book for a broad range of scientists, industrial practitioners, graduate and undergraduate students, and other professionals in the fields of polymer science and engineering, materials science, surface science, bioengineering and chemical engineering. Part 1 comprises 22 chapters covering early stages of the development of CNT, synthesis techniques, growth mechanism, the physics and chemistry of CNT, various innovative characterization techniques, the need of functionalization and different types of functionalization methods as well as the different properties of CNT. A full chapter is devoted to theory and simulation aspects. Moreover, it pursues a significant amount of work on life cycle analysis of CNT and toxicity aspects. Part 2 covers CNT-based polymer nanocomposites in approximately 23 chapters. It starts with a short introduction about polymer nanocomposites with special emphasis on CNT-based polymer nanocomposites, different manufacturing techniques as well as critical issues concerning CNT-based polymer nanocomposites. The text deeply reviews various classes of polymers like thermoset, elastomer, latex, amorphous thermoplastic, crystalline thermoplastic and polymer fibers used to prepare CNT based polymer composites. It provides detailed awareness about the characterization of polymer composites. The morphological, rheological, mechanical, viscoelastic, thermal, electrical, electromagnetic shielding properties are discussed in detail. A chapter dedicated to the simulation and multiscale modelling of polymer nanocomposites is an additional attraction of this part of the Handbook. Part 3 covers various potential applications of CNT in approximately 27 chapters. It focuses on individual applications of CNT including mechanical applications, energy conversion and storage applications, fuel cells and water splitting, solar cells and photovoltaics, sensing applications, nanofluidics, nanoelectronics and microelectronic devices, nano-optics, nanophotonics and nano-optoelectronics, non-linear optical applications, piezo electric applications, agriculture applications, biomedical applications, thermal materials, environmental remediation applications, anti-microbial and antibacterial properties and other miscellaneous applications and multi-functional applications of CNT based polymer nanocomposites. One chapter is fully focussed on carbon nanotube research developments: published papers and patents. Risks associated with carbon nanotubes and competitive analysis of carbon nanotubes with other carbon allotropes are also addressed in this Handbook.

Download or read book Polymer Biointerfaces written by Marián Lehocký and published by MDPI. This book was released on 2020-12-02 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dear Colleagues, Polymer biointerfaces are considered a suitable alternative to the improvement and development of numerous applications. The optimization of polymer surface properties can control several biological processes, such as cell adhesion, proliferation, viability, and enhanced extracellular matrix secretion functions at biointerfaces. This printed Special Issue on Polymer Biointerfaces is focused on fundamental and applied research on polymers and systems with biological origin. Submissions contain both polymer material background and descriptions of interacting biological phenomena or relevance to prospective applications in biomedical, biochemical, biophysical, biotechnological, food, pharmaceutical, or cosmetic fields. Special attention has been given to polymer bio-surface modification, bio-coatings, cell–polymer surface interactions, self-assembling monolayers on polymers, in-vivo and in-vitro systems, protein–polymer surface interaction, polysaccharide–polymer interactions, biotribology, bio chip, biosensors, nano-bio interfaces, coatings, biofilms, adhesion phenomena, and molecular recognition, among others. Assoc. Prof. Marián LehockýAssoc. Prof. Petr HumpolíčekGuest Editors

Download or read book Advanced Ceramics for Versatile Interdisciplinary Applications written by Shiv Singh and published by Elsevier. This book was released on 2022-02-23 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Ceramics for Versatile Interdisciplinary Applications describes recent progress in ceramic synthesis and their applications in areas of catalysis, lithium-ion batteries, microbial fuel cells, and biomedical applications. Advancements in ceramic syntheses, such as laser additive manufacturing technologies are also discussed, as are developments in magnetic-based, doped and piezoelectric ceramics and their applications. Other sections cover mixed ionic-electronic conducting ceramic membranes for electrochemical applications, ceramic separators for microbial fuel cells, ceramic polymer composites for lithium-ion batteries, and hybrid ceramic nanocomposites for catalysis applications. The use of metal and metal oxide nanostructures as antimicrobial agents offer a wide range of advantages, ranging from straightforward synthesis to less prone towards resistance development by microbes. Finally, the development of biocompatible ceramic materials, mechanical and chemical properties, and applications are discussed in detail. The book will be useful for new researchers, academics and postgraduate students all working in the area of ceramics and their potential applications. - Focuses on the optical and electrochemical properties of advanced ceramic materials and MXenes - Covers synthesis, characterization techniques and a diverse range of applications, including energy and biomaterials - Contains contributions from a diverse range of backgrounds across chemistry, physics, materials science, engineering, medical science, environmental and industrial technology, biotechnology and biomedical engineering

Download or read book Advances in Hybrid Conducting Polymer Technology written by Syed Shahabuddin and published by Springer Nature. This book was released on 2021-01-11 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents synthesis methods, characterization techniques, properties and applications of hybrid conducting polymers. Special emphasis is given to the applications of hybrid conductive polymers, with chapters ranging from electronic devices, environmental remediation, and sensors, to medical applications.

Download or read book Polymer Fullerene Nanocomposites written by Ayesha Kausar and published by Elsevier. This book was released on 2023-01-10 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer/Fullerene Nanocomposites: Design and Applications synopsizes state-of-the-art essentials and versatile inventions in polymers and fullerenes derived nanocomposites. As the design, fabrication and exploration of polymeric materials with fullerenes in advanced nanomaterials is progressing quickly because of their unique combination of properties, including optical, electronic, electrical, mechanical, thermal, photovoltaic, sensing, shape memory, capacitive, antimicrobial, and other applications, this book fills a void in literature compilation and assessment for a field still in its infancy. The introductory chapter of this manuscript provides a comprehensive update on the fundamentals and applications of fullerenes, with following chapters revealing the properties and essential aspects of polymeric nanocomposites. Reconnoiters state-of-the-art of fullerenes Focuses on fullerene nano-additives, developing covalent interactions, and physical dispersion with conjugated polymers and other polymeric matrices Emphasizes fullerene nanowhisker and nanoball nanofillers in nanocomposites Unfolds advanced applications of polymer/fullerene nanomaterials in stimuli-responsive systems, optoelectronic devices (photovoltaics, light emitting diodes and optical sensors), fuel cells, supercapacitors and biomedical fields

Download or read book The Influence of Side Chain Modifications on Transport in Polymeric Mixed Ionic electronic Conductors written by Jonathan William Onorato and published by . This book was released on 2020 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed ionic/electronic conducting polymers (MIECs) are an important emerging class of materials, with rising interest due to the wide range of applications enabled by their unique properties. Recent research efforts have begun to focus on developing homopolymer-based MIECs by introducing ion-conducting side chains in place of alkyl chains that are more traditional for conjugated polymers. It has been widely shown that side chain variations in conjugated polymers have a significant effect on polymer electronic conduction; however, understanding of the influence of side chain variation for MIEC polymers on both the ionic and electronic conduction for MIECs remains limited, and optimization efforts have been largely Edisonian. This work seeks to expand on the field's understanding of these MIEC materials and the interplay between side chains and ionic conduction, focusing on enabling predictive understanding of their material properties. First, we explore, the influence of the connection for an oligoethylene glycol side chain, either with an oxygen atom directly attached to the polymer backbone, or with a methylene bridge, highlighting the importance of proximity of the oxygen atom to the polymer backbone on ionic conductivity. We follow this with an investigation into varying the concentration and position of oxygen atoms of an oligoethylene glycol side chain, highlighting the influence that subtle changes in oxygen atom placement have on the polymer morphology, and polymer interactions with lithium salts.