Investigating Structural Properties and Correlating Crystalline Order with Electrical Properties in Oligothiophene Langmuir-Blodgett Monolayers PDF Download

Author: Florent Martin
Publisher:
ISBN:
Category :
Languages : en
Pages : 98

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Author: Florent Martin
Publisher:
ISBN:
Category :
Languages : en
Pages : 268

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Book Description
Correlating structural and electrical properties of organic thin films is a key requirement to understand charge transport in these materials. The electrical conductivity of organic films should be strongly dependent on how the molecules arrange to form films and crystals. Here we report on the structural and electrical characterization of organic monolayers by Atomic Force Microscopy and through the nano-fabrication of a coplanar electrode-dielectric platform. Organic monolayers were prepared using the solution-based Langmuir-Blodgett technique and transferred to a variety of substrates. Atomic Force Microscopy (AFM) was used to analyze the morphology and the microstructure of ultra-thin films at high resolution while electron diffraction measurements were instrumental in determining the lattice and orientation of crystalline domains within monolayers. A novel Conducting probe AFM method based on the presence of an insulating oxide layer between an organic film and a conductive silicon substrate made it possible to probe the in-plane electrical conductivity in the film. With this technique, we were able to investigate the correlation between conduction properties of oligothiophene monolayers and structural factors such as their molecular order and their lattice orientation. In order to make electrical contacts with monolayer films and study them in a Field Effect Transistor (FET) configuration, we developed coplanar electrode-dielectric substrates with roughness and surface topography in the sub-nanometer range. We present the first results on the electrical characterization of monolayers with this device which demonstrate that the coplanar geometry leads to a contact resistance by orders of magnitude lower than that found in conventional 20nm thick electrodes.

Author: Mitsumasa Iwamoto
Publisher: World Scientific
ISBN: 9810244827
Category : Science
Languages : en
Pages : 217

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This book provides a fundamental physical picture of various phenomena occurring in organic monolayers, dealing with dielectric, elastic, and electronic properties. The dielectric properties are discussed in terms of orientational order parameters, which are used to interpret the dielectric spectrum observed through Maxwell displacement current measurement and optical second harmonic generation measurement. The elastic theory of organic monolayers is based on that of liquid crystals and emphasis is placed on the interfacial effect when discussing the electronic properties of organic monolayers. The discussion in the book mainly concerns the structure dependence (dipole moment) and thickness dependence (interfacial effect) for various phenomena occurring in organic monolayers.

Author: Vasilios Georgakilas
Publisher: John Wiley & Sons
ISBN: 352767277X
Category : Science
Languages : en
Pages : 507

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All set to become the standard reference on the topic, this book covers the most important procedures for chemical functionalization, making it an indispensable resource for all chemists, physicists, materials scientists and engineers entering or already working in the field. Expert authors share their knowledge on a wide range of different functional groups, including organic functional groups, hydrogen, halogen, nanoparticles and polymers.

Author: Alexandru Mihai Grumezescu
Publisher: William Andrew
ISBN: 0128166290
Category : Science
Languages : en
Pages : 581

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Nanomaterials for Drug Delivery and Therapy presents recent advances in the field of nanobiomaterials and their important applications in drug delivery, therapy and engineering. The book offers pharmaceutical perspectives, exploring the development of nanobiomaterials and their interaction with the human body. Chapters show how nanomaterials are used in treatments, including neurology, dentistry and cancer therapy. Authored by a range of contributors from global institutions, this book offers a broad, international perspective on how nanotechnology-based advances are leading to novel drug delivery and treatment solutions. It is a valuable research resource that will help both practicing medics and researchers in pharmaceutical science and nanomedicine learn more on how nanotechnology is improving treatments. - Assesses the opportunities and challenges of nanotechnology-based drug delivery systems - Explores how nanotechnology is being used to create more efficient drug delivery systems - Discusses which nanomaterials make the best drug carriers

Author: Prasanna Chandrasekhar
Publisher: Springer
ISBN: 3319693786
Category : Technology & Engineering
Languages : en
Pages : 815

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The second edition of this popular textbook thoroughly covers the practical basics and applications of conducting polymers. It also addresses materials that have gained prominence since the first edition of this book was published, namely carbon nanotubes and graphene. The features of this new edition include: New and updated chapters on novel concepts in conducting polymers Details on interdisciplinary applications of conducting polymers An in depth description of classes of conducting polymers

Author: Karl Kadish
Publisher: Elsevier
ISBN: 9780123932297
Category : Science
Languages : en
Pages : 238

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The Porphyrin Handbook, Volume 19: Applications of Phthalocyanines provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the basic photobiology of phthalocyanines, their structure-activity relationships, mechanisms of action in a variety of biological systems, and their potential applications for various medical purposes. This text then examines the type of organization of the molecules in the solid state and the intensity of the intermolecular interactions. Other chapters consider the applications of phthalocyanines as decorative and functional materials, with emphasis on properties and structures of phthalocyanines with industrial relevance. This book discusses as well the enzyme-like catalytic functions of metal complexes derivatives and their practical applications as odor-removing systems and bacterial systems based on their effective catalytic activities. This book is a valuable resource for research scientists, engineers, and clinicians.

Author: A.D. Pomogailo
Publisher: Springer Science & Business Media
ISBN: 3540265236
Category : Technology & Engineering
Languages : en
Pages : 577

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This book presents and analyzes the essential data on nanoscale metal clusters dispersed in, or chemically bonded with polymers. Special attention is paid to the in situ synthesis of the nanocomposites, their chemical interactions, and the size and distribution of the particles in the polymer matrix. Numerous novel nanocomposites are described with regard to their mechanical, electrophysical, optical, magnetic, catalytic and biological properties. Their applications, present and future, are outlined.

Author:
Publisher: Springer Science & Business Media
ISBN: 9783540217114
Category : Technology & Engineering
Languages : en
Pages : 228

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1. T. Takata, N. Kihara, Y. Furusho: Polyrotaxanes and Polycatenanes: Recent Advances in Syntheses and Applications of Polymers Comprising of Interlocked Structures.- 2. M. Suginome, Y. Ito: Transition Metal-Mediated Polymerization of Isocyanides.- 3. K. Osakada, D. Takeuchi: Coordination Polymerization of Dienes, Allenes and Methylenecycloalkanes.

Author: Denis Fichou
Publisher: John Wiley & Sons
ISBN: 3527611703
Category : Technology & Engineering
Languages : de
Pages : 558

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Book Description
This first concise handbook on this important new class of organic conducting materials gives a broad survey over this emerging field of research. The physical background is covered as well as the synthesis, electronic and nonlinear optical properties and applications of these advanced materials. This information will be of high value for graduate students, researchers and practitioners working in the interdisciplinary field of materials science, polymer and organic chemistry and applied physics.