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Ionic Liquid Crystals

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ISBN: 9783039210862 9783039210879 Year: Pages: 108 DOI: 10.3390/books978-3-03921-087-9 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Chemical Engineering
Added to DOAB on : 2019-06-26 08:44:06
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In this book we have collected a series of state-of-the art papers written by specialists in the field of ionic liquid crystals (ILCs) to address key questions concerning the synthesis, properties, and applications of ILCs. New compounds exhibiting ionic liquid crystalline phases are presented, both of calamitic as well as discotic type. Their dynamic and structural properties have been investigated with a series of experimental techniques including differential scanning calorimetry, polarized optical spectroscopy, X-ray scattering, and nuclear magnetic resonance, impedance spectroscopy to mention but a few. Moreover, computer simulations using both fully atomistic and highly coarse-grained force fields have been presented, offering an invaluable microscopic view of the structure and dynamics of these fascinating materials.

Advances in Cholesteric Liquid Crystals

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ISBN: 9783039282289 9783039282296 Year: Pages: 122 DOI: 10.3390/books978-3-03928-229-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General) --- Science (General)
Added to DOAB on : 2020-04-07 23:07:08
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With their helical structure, cholesteric liquid crystals figure prominently in liquid crystal science. The selective reflection of light is their flagship property, and they offer a myriad of applications as advanced optical materials with multiscale properties. The cholesteric structure is also a ubiquitous design in the animal and plant kingdoms. This book contains eight contributions on fundamental investigations about defects, textures and structures of cholesteric materials, and experimental studies aimed at applications such as temperature sensors, head-up displays for improving automobile driving safety, or smart windows.

Liquid Crystal Optical Device

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ISBN: 9783039280568 9783039280575 Year: Pages: 98 DOI: 10.3390/books978-3-03928-057-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Physics (General) --- Science (General)
Added to DOAB on : 2020-01-30 16:39:46
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The Special Issue “Liquid Crystal Optical Devices” discusses recent developments in the rapidly advancing subject of liquid crystals (LCs).

Advances in Optofluidics

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ISBN: 9783038970958 9783038970965 Year: Pages: VIII, 140 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering --- Optics and Lights
Added to DOAB on : 2018-08-15 11:37:09
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Optofluidics a niche research field that integrates optics with microfluidics. It started with elegant demonstrations of the passive interaction of light and liquid media such as liquid waveguides and liquid tunable lenses. Recently, the optofluidics continues the advance in liquid-based optical devices/systems. In addition, it has expanded rapidly into many other fields that involve lightwave (or photon) and liquid media. This Special Issue invites review articles (only review articles) that update the latest progress of the optofluidics in various aspects, such as new functional devices, new integrated systems, new fabrication techniques, new applications, etc. It covers, but is not limited to, topics such as micro-optics in liquid media, optofluidic sensors, integrated micro-optical systems, displays, optofluidics-on-fibers, optofluidic manipulation, energy and environmental applciations, and so on.

Optics and Spectroscopy for Fluid Characterization

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ISBN: 9783038970217 9783038970224 Year: Pages: VIII, 120 Language: Englisch
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemical Engineering
Added to DOAB on : 2018-08-21 15:51:54
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All over the world, there is a huge and ever-increasing interest in the development and application of optical and spectroscopic techniques to characterize fluids in engineering and science. The large number of review articles that are frequently published in these areas is evidence of this. Recent examples have focused on applications of optical diagnostics to gas phase environments, liquids, and multiphase systems. A key feature of such light-based methods is that they are usually non-intrusive, and hence they do not notably affect the system under investigation. As a consequence, optical techniques have been developed for many decades and represent the gold standard in many fields. The list of individual techniques utilizing absorption, refraction, diffraction and scattering effects is long and so is the list of the parameters that can be determined. The latter includes macroscopic properties such as temperature, chemical composition, thermophysical quantities, and flow velocity, but molecular information, e.g., about isomerism and intermolecular interactions, can also be obtained. This Special Issue entitled “Optics and Spectroscopy for Fluid Characterization” aims to demonstrate the breadth of the field in terms of methodology, as well as applications.

Electronic Democracy

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ISBN: 9783847400189 9783866495463 Year: DOI: 10.3224/84740018 Language: English
Publisher: Verlag Barbara Budrich Grant: Knowledge Unlatched - 102281
Subject: Political Science
Added to DOAB on : 2019-03-07 11:21:02
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The timely book takes stock of the state of the art and future of electronic democracy, exploring the history and potential of e-democracy in global perspective. Analysing the digital divide, the role of the internet as a tool for political mobilisation, internet Voting and Voting Advice Applications, and other phenomena, this volume critically engages with the hope for more transparency and political participation through e-democracy.

Reinigungsfähigkeit von Filtermedien mithilfe kontinuierlicher und pulsierender Strömung

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ISBN: 9783731503224 Year: Pages: IV, 169 p. DOI: 10.5445/KSP/1000044959 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Chemistry (General)
Added to DOAB on : 2019-07-30 20:02:00
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This work deals with the analysis of the cleaning mechanism of polymer woven filter media. It reports parametric studies for the cleaning of filter media using continuous and pulsed flows for different kinds of impurities and filter geometries. There the focus is on the development of dimensionless operation numbers, which can be used to predict the cleaning result of the respective filter medium.

High-Speed, Low-Power and Mid-IR Silicon Photonics Applications

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Book Series: Karlsruhe Series in Photonics and Communications / Karlsruhe Institute of Technology, Institute of Photonics and Quantum Electronics (IPQ) ISSN: 18651100 ISBN: 9783731500568 Year: Volume: 12 Pages: X, 92 p. DOI: 10.5445/KSP/1000035591 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:01
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In this book, the first high-speed silicon-organic hybrid (SOH) modulator is demonstrated by exploiting a highly-nonlinear polymer cladding and a silicon waveguide. By using a liquid crystal cladding instead, an ultra-low power phase shifter is obtained. A third type of device is proposed for achieving three-wave mixing on the silicon-organic hybrid (SOH) platform. Finally, new physical constants which describe the optical absorption in charge accumulation/inversion layers in silicon are determined.

Modern Sample Preparation Approaches for Separation Science

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ISBN: 9783039214112 9783039214129 Year: Pages: 282 DOI: 10.3390/books978-3-03921-412-9 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General) --- Analytical Chemistry
Added to DOAB on : 2019-12-09 11:49:15
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This book will provide the most recent knowledge and advances in Sample Preparation Techniques for Separation Science. Everyone working in a laboratory must be familiar with the basis of these technologies, and they often involve elaborate and time-consuming procedures that can take up to 80% of the total analysis time. Sample preparation is an essential step in most of the analytical methods for environmental and biomedical analysis, since the target analytes are often not detected in their in-situ forms, or the results are distorted by interfering species. In the past decade, modern sample preparation techniques have aimed to comply with green analytical chemistry principles, leading to simplification, miniaturization, easy manipulation of the analytical devices, low costs, strong reduction or absence of toxic organic solvents, as well as low sample volume requirements.Modern Sample Preparation Approaches for Separation Science also provides an invaluable reference tool for analytical chemists in the chemical, biological, pharmaceutical, environmental, and forensic sciences.

Keywords

vitamins --- extraction --- determination --- review --- sample preparation --- matrix solid phase dispersion --- sorbent --- miniaturization --- on-line --- blueberry --- non-anthocyanin polyphenol --- vortex-assisted dispersive liquid-liquid microextraction --- response surface methodology --- desirability function approach --- nail --- curie temperature --- high-frequency heating --- liquid chromatography–tandem mass spectrometry --- caffeine --- amlodipine --- gas chromatography --- hydrogel --- hormones --- pectin --- polyvinyl alcohol --- sample preparation --- in-tube SPME --- UHPLC-MS/MS --- organic-based monoliths --- antipsychotics --- plasma samples --- schizophrenic’ patients --- salting-out assisted liquid–liquid extraction --- sugaring-out assisted liquid–liquid extraction --- hydrophobic-solvent assisted liquid–liquid extraction --- subzero-temperature assisted liquid–liquid extraction --- phenolic compounds --- sorbent-based techniques --- multi-spheres adsorptive micro-extraction (MSA?E) --- floating sampling technology --- caffeine and acetaminophen tracers --- environmental water matrices --- vortex-assisted dispersive liquid-liquid microextraction --- China herbal tea --- pesticides residue --- aflatoxins --- UPLC-MS/MS --- vortex-synchronized matrix solid-phase dispersion --- crab shells --- ionic liquids --- anthraquinones --- Cassiae Semen --- sample preparation --- nanocomposite --- pathogenic --- enrichment --- nucleic acid isolation --- sample preparation with TLC/HPTLC --- solvent front position extraction --- solvent delivery with a moving pipette --- automation --- LC–MS/MS --- environmental analysis --- whole water --- trace analysis --- SPE --- large volume --- in-line filter --- sand --- flow rate --- pharmaceuticals --- hormones --- pesticides --- space instrumentation --- liquid chromatography --- oligopeptides --- trapping system --- membrane-based microextraction --- barbiturates --- simultaneous determination --- whole blood --- urine --- liver --- sample preparation --- oxylipins --- protein precipitation --- liquid–liquid extraction --- solid-phase extraction --- biological samples --- chlorophenoxy acid herbicides --- HPLC --- hydrophobic in-tube solid-phase microextraction --- poly (OMA-co-TRIM) monolithic column --- rice grains --- gold --- sample preparation --- preconcentration --- geological samples

Microlenses

ISBN: 9783038420507 9783038420507 Year: Pages: 160 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Added to DOAB on : 2015-10-22 08:40:45
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The study and application of microscale lenses and lens arrays enjoys a long history. Advances in microfabrication technologies in the past few decades have enabled the design and fabrication of microlenses and microlens arrays through many different approaches. In recent years, there has been notably a host of exciting developments in the microlenses and microlens arrays, including tunable-focus ones, those fabricated on non-planar substrates and surfaces, and microlens arrays mimicking natural compound eyes, to name just a few. The developments in microlenses and microlens arrays have found profound applications in many engineering and biomedical fields, including but not limited to optical coherence tomography (OCT), endoscopy, photolithography, 3-dimensional imaging, optical communications, and lab on chips. This Special Issue aims to highlight the state of the art in the development of microlenses and microlens arrays; examples being fabrication technologies and optical characterizations. It also focuses on their applications when implemented in microoptical systems.

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