Author: Augustine Che-Tsung FouPublisher:
ISBN:
Category :
Languages : en
Pages : 358
Book Description
Design, Fabrication, and Characterization of Complex, Multilayer Heterostructures of Conjugated and Non-conjugated Polymers Via Molecular Self-assembly
Author: Augustine Che-Tsung FouPublisher:
ISBN:
Category :
Languages : en
Pages : 358
Book Description
Self-Assembly of Polymers
Author: Dmitry VolodkinPublisher: MDPI
ISBN: 3039285068
Category : Technology & Engineering
Languages : en
Pages : 186
Book Description
Nowadays, polymer self-assembly has become extremely attractive for both biological (drug delivery, tissue engineering, scaffolds) and non-biological (packaging, semiconductors) applications. In nature, a number of key biological processes are driven by polymer self-assembly, for instance protein folding. Impressive morphologies can be assembled from polymers thanks to a diverse range of interactions involved, e.g., electrostatics, hydrophobic, hots-guest interactions, etc. Both 2D and 3D tailor-made assemblies can be designed through modern powerful techniques and approaches such as the layer-by-layer and the Langmuir-Blodgett deposition, hard and soft templating. This Special Issue highlights contributions (research papers, short communications, review articles) that focus on recent developments in polymer self-assembly for both fundamental understanding the assembly phenomenon and real applications.
Conjugated Polymers And Oligomers: Structural And Soft Matter Aspects
Author: Matti KnaapilaPublisher: World Scientific
ISBN: 9813225777
Category : Science
Languages : en
Pages : 204
Book Description
This book identifies modern topics and current trends of structural and soft matter aspects of conjugated polymers and oligomers. Each chapter recognizes an active research line where structural perspective dominates research and therefore the book covers fundamental aspects of persistent conjugated polymer backbone, water soluble conjugated polyelectrolytes and surfactants, conjugated molecules and biomolecules and DNA and the advanced use of synchrotron radiation and electron microscopy to find out structural details in conjugated molecule films and devices as well as under ambient and extreme conditions.
Design, Synthesis and Characterization of Self-assembling Conjugated Polymers for Use in Organic Electronic Applications
Author: Kathy Beckner WoodyPublisher:
ISBN:
Category : Organic electronics
Languages : en
Pages :
Book Description
Conjugated polymers comprise some of the most promising materials for new technologies such as organic field effect transistors, solar light harvesting technology and sensing devices. In spite of tremendous research initiatives in materials chemistry, the potential to optimize device performance and develop new technologies is remarkable. Understanding relationships between the structure of conjugated polymers and their electronic properties is critical to improving device performance. The design and synthesis of new materials which self-organize into ordered nanostructures creates opportunities to establish relationships between electronic properties and morphology or molecular packing. This thesis details our progress in the development of synthetic routes which provide access to new classes of conjugated polymers that contain dissimilar side chains that segregate or dissimilar conjugated blocks which phase separate, and summarizes our initial attempts to characterize these materials. Poly(1,4-phenylene ethynylene)s (PPEs) have been used in a variety of organic electronic applications, most notably as fluorescent sensors. Using traditional synthetic methods, asymmetrically disubstituted PPEs have irregular placement of side chains on the conjugated backbone. Herein, we establish the first synthetic route to an asymmetrically substituted regioregular PPEs. The initial PPEs in this study have different lengths of alkoxy side chains, and both regioregular and regiorandom analogs are synthesized and characterized for comparison. The design of amphiphilic structures provides additional opportunities for side chains to influence the molecular packing and electronic properties of conjugated polymers. A new class of regioregular, amphiphilic PPEs has been prepared bearing alkoxy and semifluoroalkoxy side chains, which have a tendency to phase separate. Fully conjugated block copolymers can provide access to interesting new morphologies as a result of phase separation of the conjugated blocks. In particular, donor-acceptor block copolymers that phase separate into electron rich and electron poor domains may be advantageous in organic electronic devices such as bulk heterojunction solar cells, of which the performance relies on precise control of the interface between electron donating and accepting materials. The availability of donor-acceptor block copolymers is limited, largely due to the challenges associated with synthesizing these materials. In this thesis, two new synthetic routes to donor-acceptor block copolymers are established. These methods both utilize the catalyst transfer condensation polymerization, which proceeds by a chain growth mechanism. The first example entails the synthesis of a monofunctionalized, telechelic poly(3-alkylthiophene) which can be coupled to electron accepting polymers in a subsequent reaction. The other method describes the first example of a one-pot synthesis of a donor-acceptor diblock copolymer. The methods of synthesis are described, and characterization of the block copolymers is reported.
Design, Synthesis, and Application of Novel π-Conjugated Materials - Part II
Author: Haichang ZhangPublisher: Frontiers Media SA
ISBN: 2889716112
Category : Science
Languages : en
Pages : 70
Book Description
Engineering the Multi-length Scale Structure of Self-assembled Conjugated Polymer Networks
Author: Gregory Matthew NewbloomPublisher:
ISBN:
Category :
Languages : en
Pages : 252
Book Description
Conjugated polymers are a Nobel Prize winning class of materials known for their intrinsic semi-conducting properties and have been used in applications as diverse as organic-based solar cells, transistors, light emitting diodes, sensors and thermoelectric devices. These applications have varying, but optimized, structure and property requirements which often include an interconnected network of conjugated polymers to transport charge. In this work, self-assembly and gelation are explored as a platform to engineer the multi-length scale structure of conjugated polymer networks. A detailed understanding is developed through structural characterization of each stage of the self-assembly process: dissolved polymer, semi-crystalline fiber, fibrillar branching and percolated network formation. Variations in self-assembly conditions were utilized to develop multi-length scale structure-property relationships. Furthermore, a new method to directly incorporate these fibrillar network structures into thin films for organic electronics is discussed. This dissertation will demonstrate our work towards understanding the mechanisms behind conjugated polymer self-assembly in order to provide robust design parameters that can be tuned to generate specific structures, occurring on multiple length scales, and relevant properties for a diversity of applications.
Conjugated Polymers
Author: J.L. BrédasPublisher: Springer Science & Business Media
ISBN: 9401134766
Category : Science
Languages : en
Pages : 638
Book Description
Conjugated Objects
Author: Atsushi NagaiPublisher: CRC Press
ISBN: 1351859625
Category : Science
Languages : en
Pages : 536
Book Description
Conjugated Objects: Development, Synthesis, and Application contains 17 chapters written by young researchers and contains current trends in pi-conjugated systems for application in broad research areas such as design of unique pi-conjugation, catalysts, self-assembly, charge transfer complexes, liquid crystals, supramolecules, and nanostructures by using conjugated small and/or macro-objects organically or electrochemically. The book can be used as a textbook of basic learning by undergraduate and graduate students of chemistry, electrical and electronics engineering, and materials science and by supramolecular researchers in nanotechnology and biotechnology.
Synthetic Methods for Conjugated Polymer and Carbon Materials
Author: Mario LeclercPublisher: John Wiley & Sons
ISBN: 3527339981
Category : Technology & Engineering
Languages : en
Pages : 312
Book Description
A concise and practical overview of the most important modern synthetic aspects of conjugated polymers and carbon materials, including their properties and applications. Well structured, this book summarizes recent achievements, outlines the current state and reviews research trends. As such, a wide variety of polymerization techniques are included on both a strategic as well as a practical level, including Stille, Suzuki , and direct (hetero)arylation polymerizations. Furthermore, it covers various carbon-rich materials, such as graphene and carbon nanotubes, followed by a look at how the different synthetic pathways and strategies influence their final properties, for example, for use in organic electronic devices. The whole is rounded off with a discussion of future technology advances. An essential reference for newcomers as well as experienced researchers in the field.
Author: Eike Jahnke