Electrowetting
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Electrowetting
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Author : Frieder Mugele
language : en
Publisher: John Wiley & Sons
Release Date : 2019-04-29
Electrowetting written by Frieder Mugele and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-04-29 with Science categories.
Starting from the basic principles of wetting, electrowetting and fluid dynamics all the way up to those engineering aspects relevant for the development of specific devices, this is a comprehensive introduction and overview of the theoretical and practical aspects. Written by two of the most knowledgeable experts in the field, the text covers both current as well as possible future applications, providing basic working principles of lab-on-a-chip devices and such optofluidic devices as adaptive lenses and optical switches. Furthermore, novel e-paper display technology, energy harvesting and supercapacitors as well as electrowetting in the nano-world are discussed. Finally, the book contains a series of exercises and questions for use in courses on microfluidics or electrowetting. With its all-encompassing scope, this book will equally serve the growing community of students and academic and industrial researchers as both an introduction and a standard reference.
Electrowetting
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Author : Ya-Pu Zhao
language : en
Publisher: VSP Books
Release Date : 2012-02-01
Electrowetting written by Ya-Pu Zhao and has been published by VSP Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-02-01 with Electrochemistry categories.
Since Gabriel Lippmann 's experiments demonstrating electrocapillarity in 1875, the ability to manipulate physical properties at the phase boundaries by applying electric fields has been vigorously pursued.Electrowetting (EW) essentially involves modulating the wetting properties of a solid surface by applying external electric fields. Electroweting-on-dielectric (EWOD) is a modified(improved) version in which a thin dielectric layer is introduced between the conducting droplet and the electrode(solid).Recently there has been explosive interest in the burgeoning field of Electrowetting. This is attributed to myriad applications of EW including variable-focus liquid lenses, display devices, mirrors, electrical and thermal switches, tensiometer, rheometers, digital microfluidic and lab-on-a-chip devices for bioanalysis and controlled drug delivery, and self-cleaning surfaces.This book containing 31 papers by world-class researchers focuses on theoretical treatments, mechanisms, performance enhancement, and demonstrated and perceived applications of Electrowetting. As we learn more about this fascinating phenomenon, more application vistas will emerge.This is the first comprehensive book with contributions from scores of luminaries in this field. We certainly hope this book will serve as a fountainhead for new research ideas. The book is profusely illustrated and copiously referenced, and it should be very useful and of much interest to beginners (as a guide) and veteran researchers as a commentary on contemporary research in this fast-growing topic. Moreover, this book should be a source of much useful information for those working or interested in the above-mentioned application areas.
Electrowetting Advances And Applications
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Author : Ya-Pu Zhao
language : en
Publisher:
Release Date : 2013-11-05
Electrowetting Advances And Applications written by Ya-Pu Zhao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-05 with Science categories.
Since Gabriel Lippmanne(tm)s experiments demonstrating electrocapillarity in 1875, the ability to manipulate physical properties at the phase boundaries by applying electric fields has been vigorously pursued.Electrowetting (EW) essentially involves modulating the wetting properties of a solid surface by applying external electric fields. Electroweting-on-dielectric (EWOD) is a modified(improved) version in which a thin dielectric layer is introduced between the conducting droplet and the electrode(solid).Recently there has been explosive interest in the burgeoning field of Electrowetting. This is attributed to myriad applications of EW including variable-focus liquid lenses, display devices, mirrors, electrical and thermal switches, tensiometer, rheometers, digital microfluidic and lab-on-a-chip devices for bioanalysis and controlled drug delivery, and self-cleaning surfaces.This book containing 31 papers by world-class researchers focuses on theoretical treatments, mechanisms, performance enhancement, and demonstrated and perceived applications of Electrowetting. As we learn more about this fascinating phenomenon, more application vistas will emerge.This is the first comprehensive book with contributions from scores of luminaries in this field. We certainly hope this book will serve as a fountainhead for new research ideas. The book is profusely illustrated and copiously referenced, and it should be very useful and of much interest to beginners (as a guide) and veteran researchers as a commentary on contemporary research in this fast-growing topic. Moreover, this book should be a source of much useful information for those working or interested in the above-mentioned application areas.
Encyclopedia Of Microfluidics And Nanofluidics
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Author : Dongqing Li
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-08-06
Encyclopedia Of Microfluidics And Nanofluidics written by Dongqing Li and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-08-06 with Technology & Engineering categories.
Covering all aspects of transport phenomena on the nano- and micro-scale, this encyclopedia features over 750 entries in three alphabetically-arranged volumes including the most up-to-date research, insights, and applied techniques across all areas. Coverage includes electrical double-layers, optofluidics, DNC lab-on-a-chip, nanosensors, and more.
Microdroplet Technology
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Author : Philip Day
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-07-28
Microdroplet Technology written by Philip Day and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-07-28 with Science categories.
Microdroplet technology has recently emerged to provide new and diverse applications via microfluidic functionality, especially in various areas of biology and chemistry. This book, then, gives an overview of the principle components and wide-ranging applications for state-of-the-art of droplet-based microfluidics. Chapter authors are internationally-leading researchers from chemistry, biology, physics and engineering that present various key aspects of micrdroplet technology -- fundamental flow physics, methodology and components for flow control, applications in biology and chemistry, and a discussion of future perspectives. This book acts as a reference for academics, post-graduate students, and researcher wishing to deepen their understand of microfluidics and introduce optimal design and operation of new droplet-based microfluidic devices for more comprehensive analyte assessments.
Advanced Aqueous Solutions For Low Voltage And Electrolysis Free Electrowetting Devices
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Author : Balaji Raj
language : en
Publisher:
Release Date : 2009
Advanced Aqueous Solutions For Low Voltage And Electrolysis Free Electrowetting Devices written by Balaji Raj and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Electrowetting has come a long way since the concept was first introduced by Gabriel Lippmann in 1875. Since the emergence of Bruno Berge's concept of electrowetting on dielectrics in the 1990's, electrowetting has seen an explosion of interest. Recent development in electrowetting applications has led to the need for low operating voltages for many applications. Besides a low voltage requirement, larger contact angle modulation, reliable, and electrolysis free electrowetting are important for all electrowetting applications. The basis of this thesis is to compare and introduce ways to attain low voltage electrowetting on a two-layer dielectric system. Two dielectrics are investigated, Al2O3 and Si3N4. Surfactants are then tested in the form of sodium dodecyl sulfate (water soluble) and triton X-15 (oil soluble) to observe how the interfacial surface tension affects electrowetting effect. Once low voltage electrowetting is observed, the investigation of electrolysis free and reliable electrowetting is discussed. Various surfactants are tested for dielectric failure and a catanionic surfactant is synthesized. The catanionic surfactant is also tested for dielectric failure. Once those tests are performed, water is replaced as a medium for electrowetting by propylene glycol. With larger molecules for propylene glycol, dielectric failure is substantially reduced. The results of the work described herein show the promise for low voltage and reliable electrowetting.
Advancing The Frontiers Of Low Voltage Electrowetting On Dielectrics Through A Complete Understanding Of Three Phases System Interactions
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Author : Stéphanie Chevalliot
language : en
Publisher:
Release Date : 2012
Advancing The Frontiers Of Low Voltage Electrowetting On Dielectrics Through A Complete Understanding Of Three Phases System Interactions written by Stéphanie Chevalliot and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Electrowetting on dielectrics (EWOD) has recently received a significant interest mainly due to its ability to rapidly manipulate small volumes of fluids. Electrowetting controls the wetting of a liquid at an interface with a solid by application of electromechanical force. It is promising for numerous applications, ranging from adaptive lens systems to lab-on-chip devices, as well as electronic displays. While several EWOD-based products have already been commercialized, numerous challenges still have to be addressed, in order to fully exploit the potential of the electrowetting technology. The practically most important and least understood limitation of electrowetting is the saturation of contact angle, preventing complete wetting. Another significant issue encountered with EWOD is the lack of diversity of conducting fluids (mainly aqueous fluids have been investigated until now). In addition, the voltages required to obtain significant contact angle changes need to be dramatically reduced, in order to make the electrowetting technique useful for portable applications. Finally, the reliability of EWOD devices has to be improved, to enable further commercialization. In particular, factors affecting dielectric failure (through charging or breakdown) should be identified. This thesis is dedicated to understand the interactions between the three phases of EWOD systems (dielectric material, electrowetting fluid with ionic content and insulating fluid), in order to solve the four problems previously described and thus advance the frontiers of reliable and low-voltage electrowetting. In this dissertation, it is revealed that for DC driving there exists a contact angle at complete saturation that is invariant to multiple dielectric materials and fluids parameters. The experimental results refute most of the proposed hypotheses for explaining saturation. Furthermore, it is established that saturation is a time-dependent phenomenon, with different physical mechanisms dominating its behavior over different time scales. A new theory for electrowetting saturation is proposed: micro-droplet ejection through "Taylor saturation". The successful use of polar non-aqueous solvents to replace water for electrowetting applications is also reported. It is shown that with a careful selection of ionic content and a good solvent/oil match (high interfacial tension), electrowetting behaviors comparable to those of aqueous solutions can be achieved, while limiting or even eliminating the risk of dielectric failure. Non-aqueous fluids are also demonstrated as fully effective in EWOD-based display pixels. Furthermore, it is proved that ion penetration is the cause of dielectric failure. Increasing the crystallinity of Parylene C (one of the most commonly used dielectric for EWOD applications) did not appear to impact the resistance of the material toward breakdown, whereas multi-layer insulator stacking revealed an efficient method to prevent system failure. These findings advance environmental robustness and reliability issues for the commercialization of electrowetting devices.
Microfluidics Based Microsystems
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Author : S. Kakaç
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-09-10
Microfluidics Based Microsystems written by S. Kakaç and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-09-10 with Science categories.
This volume contains an archival record of the NATO Advanced Study Institute on Microfluidics Based Microsystems – Fundamentals and App- cations held in Çe ?me-Izmir, Turkey, August 23–September 4, 2009. ASIs are intended to be high-level teaching activity in scientific and technical areas of current concern. In this volume, the reader may find interesting chapters and various microsystems fundamentals and applications. As the world becomes increasingly concerned with terrorism, early - spot detection of terrorist’s weapons, particularly bio-weapons agents such as bacteria and viruses are extremely important. NATO Public Diplomacy division, Science for Peace and Security section support research, Advanced Study Institutes and workshops related to security. Keeping this policy of NATO in mind, we made such a proposal on Microsystems for security. We are very happy that leading experts agreed to come and lecture in this important NATO ASI. We will see many examples that will show us Microfluidics usefulness for rapid diagnostics following a bioterrorism attack. For the applications in national security and anti-terrorism, microfluidic system technology must meet the challenges. To develop microsystems for security and to provide a comprehensive state-of-the-art assessment of the existing research and applications by treating the subject in considerable depth through lectures from eminent professionals in the field, through discussions and panel sessions are very beneficial for young scientists in the field.
Electrowetting Fundamentals
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Author : Anthony Quinn
language : en
Publisher:
Release Date : 2003
Electrowetting Fundamentals written by Anthony Quinn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Wetting categories.
Characterization Of Electrowetting Systems For Microfluidic Applications
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Author : Pradeep K. Mishra
language : en
Publisher:
Release Date : 2009
Characterization Of Electrowetting Systems For Microfluidic Applications written by Pradeep K. Mishra and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
ABSTRACT: Electrowetting is the change in apparent surface energy in the presence of an electric field. Recently, this phenomenon has been used to control the shape and location of individual droplets on a surface. However, many microfluidics researchers have acknowledged unexplained behaviors and performance degradation. In this work, electrowetting systems are characterized with different methods. The electrowetting response is measured by measuring contact angle for different applied voltages. A novel technique for direct measurement of Electrowetting Force (EWF) using nano indenter is proposed in this work. The EWF measurements show that, for aqueous solution the EWF is more as compared to DI water. Additionally, the electrowetting system is found to be more susceptible for degradation when aqueous solution is used. The performance degradation due to defective dielectric layer is also investigated by measuring the electrowetting force. Degradation of EWOD systems with environmental exposure over time is further studied experimentally by contact angle and electrochemical impedance spectroscopy (EIS) measurements. The time constant of 'contact angle decay' with environmental exposure is found to be similar to the time constant of electrolyte diffusion in dielectric layer.