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Author: Agnes Buka Publisher: World Scientific ISBN: 1848167997 Category : Science Languages : en Pages : 299
Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: Agnes Buka Publisher: World Scientific ISBN: 1848167997 Category : Science Languages : en Pages : 299
Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: Paolo Mele Publisher: ISBN: 9781536160864 Category : Zinc oxide thin films Languages : en Pages : 0
Book Description
Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Author: Jerome V. Moloney Publisher: Springer Science & Business Media ISBN: 9780387985817 Category : Business & Economics Languages : en Pages : 270
Book Description
Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Author: Michael C. Golt Publisher: ProQuest ISBN: 9780549754602 Category : Dielectrics Languages : en Pages :
Book Description
Materials that contain both an electric permittivity and magnetic permeability> 1 are currently being investigated for use as substrates to aid in antenna miniaturization. For such applications these materials, called "magneto-dielectrics", need to be low in weight, low in loss, and high in permeability. In order for these materials to be implemented within the large volume of antennas that are produced every year, they must be easy and cost effective to manufacture in bulk quantities. An experimental procedure for fabricating magneto-dielectric materials based upon flake-like iron inclusions was developed. In order to minimize loss and maximize permeability, thin flakes with a high aspect ratio must be oriented parallel to the magnetic field. A high yield method for fabricating flakes from an iron powder precursor is discussed. Samples consisting of the iron flakes oriented within a low loss thermoplastic host were produced through several common plastics manufacturing techniques. These techniques were evaluated for their ability to orient the flakes within the plane of interest. The electrical and magnetic properties of the magneto-dielectric samples were studied. The transport properties of permeability, dielectric constant, and loss were found as a function of the filler's aspect ratio, volume fraction, and orientation distribution. It was found that forming iron powder into flakes increases the permeability by reducing the demagnetization factor of the shape. The change to higher aspect ratio filler also increased the dielectric constant and the dielectric loss due to greater instances of inter-particle conduction. Insulating the flakes with a low dielectric coating greatly reduced the dielectric constant and the loss. The measured composite properties were compared with several existing transport models. The Wu-McCullough model was found to be the most accurate in predicting the transport properties, but only when an accurate description of the microstructure was known. Therefore great effort was applied to precisely identifying microstructure parameters such as flake aspect ratio and orientation.
Author: Agnes Buka
Author: Agnes Buka
Author: Paolo Mele
Author: Jerome V. Moloney
Author: Michael C. Golt