Voltage Responsive Transport Properties Of Ion Current Through Single Nanopores
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Voltage Responsive Transport Properties Of Ion Current Through Single Nanopores
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Author : Matthew R. Powell
language : en
Publisher:
Release Date : 2010
Voltage Responsive Transport Properties Of Ion Current Through Single Nanopores written by Matthew R. Powell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Conically shaped polymer nanopores exhibit unique transport properties such as, ion selectivity, current rectification, and voltage dependent ionic concentration enhancement inside the pore. These effects are all caused by the asymmetrical conical geometry and the charged surfaces of the pore walls. The charged pore walls create a region where ions from the surrounding solution are attracted at increased concentrations. The region of enhanced concentrations is on the same scale as the nanometer size pore diameters, thus causing a situation where the surface to volume ratio is very high and these surface effects dominate. The electric fields introduced from an applied voltage further influence the region of concentration enhancement and thus the transport properties. In this research we have investigated the effect of voltage dependent concentration enhancement on the ion current noise through the nanopore as well as the effect the concentration enhancement has on solubility inside the pore. We discovered that the conically shaped polymer nanopores used in this research show ion current fluctuations with voltage dependent 1/f noise characteristics. Under certain electrolyte concentrations, the 1/f noise characteristics are asymmetric with respect to the voltage polarity. When this is the case, the low conductance state shows normalized 1/f noise in equilibrium, independent of the voltage. When in the high conductance state, the normalized 1/f noise shows non-equilibrium, strong voltage dependent noise behavior. The voltage dependent concentration enhancement also causes conically shaped polymer nanopores to show negative incremental resistance and ion current oscillations under the addition of a small concentration of divalent cations to a buffered monovalent ionic solution. The ion current oscillations are caused by the transient formation and redissolution of nanoprecipitates inside the pore, which temporarily block the ion current. The concentration enhancement causes the species of the precipitate to rise above the solubility product inside the pore and form this blockage. This research contributes to the goal of using nanopores as devices and sensors through a better understanding of nanopore transport properties and processes occurring on the nanoscale.
Radiation Synthesis Of Stimuli Responsive Membranes Hydrogels And Adsorbents For Separation Purposes
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Author : International Atomic Energy Agency
language : en
Publisher: IAEA
Release Date : 2005
Radiation Synthesis Of Stimuli Responsive Membranes Hydrogels And Adsorbents For Separation Purposes written by International Atomic Energy Agency and has been published by IAEA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Business & Economics categories.
This Coordinated Research Project coordinated research work for the development of novel materials prepared by radiation processing techniques. Fast stimuli-responsive hydrogels based on natural and synthetic polymers, temperature responsive membranes and selective adsorbents were produced and tested for different applications.
Molecular And Nano Tubes
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Author : Oliver Hayden
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-08-04
Molecular And Nano Tubes written by Oliver Hayden 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 2011-08-04 with Technology & Engineering categories.
Molecular- and Nano-Tubes summarizes recent advancements in the synthesis, fabrication and applications of tubular structures. An interdisciplinary overview of innovative science focused on tubular structures is provided. The reader is offered an overview of the different fields that molecular and nano tubes appear in, in order to learn the fundamental basics as well as the applications of these materials. This book also: Shows how nanotechnology creates novel materials by crossing the barriers between biology and material science, electronics and optics, medicine and more Demonstrates that tubes are a fundamental element in nature and used in disparate applications such as ion channels and carbon nanotubes Molecular- and Nano-Tubes is an ideal volume for researchers and engineers working in materials science and nanotechnology.
Handbook Of Biomimetics And Bioinspiration
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Author : Esmaiel Jabbari
language : en
Publisher: World Scientific
Release Date : 2014
Handbook Of Biomimetics And Bioinspiration written by Esmaiel Jabbari and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Science categories.
self-assembly and responsiveness of cellular systems; the biomineral formation in bacteria, plants, invertebrates, and vertebrates; the multi-layer structure of skin; the organization of tissue fibers; DNA structures with metal-mediated artificial base pairs; and the anisotropic microstructure of jellyfish mesogloea. In this volume, sensor and microfluidic technologies combined with surface patterning are explored for the diagnosis and monitoring of diseases. The high throughput combinatorial testing of biomaterials in regenerative medicine is also covered. The second volume presents nature-oriented studies and developments in the field of electromechanical devices and systems.
Bio Inspired Asymmetric Design And Building Of Biomimetic Smart Single Nanochannels
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Author : Xu Hou
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-05-28
Bio Inspired Asymmetric Design And Building Of Biomimetic Smart Single Nanochannels written by Xu Hou 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 2013-05-28 with Technology & Engineering categories.
In this thesis, the author introduces various bio-inspired smart nanochannel systems. A strategy for design and preparation of novel artificial responsive symmetric/asymmetric single nanochannel systems under various symmetric/asymmetric stimuli is presented for the first time. The author’s research work utilizes ion track etching polymer nanochannels with different shapes as examples to demonstrate the feasibility of the design strategy for building novel artificial functional nanochannels using various symmetric/asymmetric physicochemical modifications. The development of these nanochannels and their potential applications is a burgeoning new area of research, and a number of exciting breakthroughs may be anticipated in the near future from the concepts and results reported in this thesis. Research into artificial functional nanochannels continues to drive new developments of various real-world applications, such as biosensors, energy conversion systems and nanofluidic devices. The work in this thesis has led to more than 15 publications in high-profile journals.
Chemically Modified Nanopores And Nanochannels
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Author : Mario Tagliazucchi
language : en
Publisher: William Andrew
Release Date : 2016-08-29
Chemically Modified Nanopores And Nanochannels written by Mario Tagliazucchi and has been published by William Andrew this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-29 with Technology & Engineering categories.
Chemically Modified Nanopores and Nanochannels is devoted to chemically modified nanopores and nanochannels, and covers the fundamentals of transport in chemically modified systems, an account of the different preparation and characterization techniques of chemically modified nanopores, their applications, and case studies. The book is designed for materials and biomaterials scientists, biomedical engineers, chemists, and chemical engineers who are interested in designing and utilizing processes to synthesize, modify, characterize, use, and model nanopores. The strong chemical focus of the book differentiates it from other books published on nanopores, which traditionally focus either on physics, biophysics, and nanofabrication (solid-state nanopores) or biophysics and biology (biological ion channels and pores). Explains how the chemical modification of nanopores and nanochannels can be used in filtration, membranes, and sensing Provides advanced coverage of novel synthetic applications Focuses on the latest developments in nanopore and nanochannel engineering Presents an account of the different preparation and characterization techniques of chemically modified nanopores, their applications, and case studies
Controlled Nanoscale Motion
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Author : Heiner Linke
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-02-09
Controlled Nanoscale Motion written by Heiner Linke 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 2007-02-09 with Science categories.
When the size of a machine approaches the nanometer scale, thermal fluctuations become large compared to the energies that drive the motor. The control of motion at the nanoscale therefore requires physical understanding and technical approaches that are fundamentally different from those that are successful at the macroscale. This volume provides an introduction to the state-of-the-art of controlled nanoscale motion in biological and artificial systems. Topics include the control and function of protein motors, the physics of non-equilibrium Brownian motion, and the physics and fabrication of synthetic molecular motors. The chapters in this book are based on selected contributions on the 2005 Nobel Symposium to Controlled Nanoscale Motion and are written by leading experts in their fields.
Solid State Nanopores
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Author : Jean-Pierre Leburton
language : en
Publisher: Springer Nature
Release Date : 2023-09-30
Solid State Nanopores written by Jean-Pierre Leburton and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-09-30 with Technology & Engineering categories.
This contributed volume provides an overview of the recent advances in solid-state nanopore technology, featuring contributions by leading experts in the field. It discusses several aspects of solid-state nanopores, covering their fabrication as well as multiple biosensing applications. It successfully bridges the gap between various scientific and engineering disciplines and highlights the progress made in this area. This title is a useful tool for acquiring basic knowledge of this field and following recent progress. It is a valuable contribution to the area of nanopore biosensing and is of interest to graduate students, postdocs, or senior researchers working in the fields of physical chemistry, biochemistry, bio- and electrical engineering, and biophysics.
Engineering Transport Through Biological And Synthetic Nanopores
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Author : Steven F. Buchsbaum
language : en
Publisher:
Release Date : 2016
Engineering Transport Through Biological And Synthetic Nanopores written by Steven F. Buchsbaum and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Biological nanopores are an essential element to the success of the lipid bilayer that makes life possible on the cellular level. Protein based pores are responsible for the transport of specific ions and molecules across the bilayer and can accomplish their jobs with incredible variety. Some pores, such as those from bacteria have relatively simple structures and allow for many types of transport. Others, like those found in neurons have very high specificity as well as the ability to respond to different cues in the surrounding environment. The vast number of biological ion channels and their complex structures make it difficult to study and understand the nanofluidic phenomena they exhibit. Inspired by the pores seen in nature, scientists have begun to create their own synthetic versions which are usually simpler in structure. These man made pores have been fabricated through a variety of techniques and materials and provide well controlled systems capable of isolating and testing specific transport phenomena. Additionally, these pores provide the building blocks with which more complicated and truly biomimetic pores can be made.In this thesis, three very different types of nanopores will be examined. First, an alpha hemolysin pore will be isolated and the physics governing transport time will be studied. The diameter and charge of single stranded DNA molecule is modified before being electrophoretically driven through the pores inner constriction. These translocation events are monitored via current measurements across the pore and a biological model is formulated to explain the behavior. This work has the potential to improve DNA sequencing technologies which are dependent on slowing down DNA translocation speed for accurate reads. Next, a synthetic conical nanopore etched in a polymer film will be used as the foundation for a biomimetic nanopore gate. Through the attachment of ssDNA to the pore walls, a pH and voltage responsive nanochannel is created. This is done through the careful selection of the DNA sequence to contain protonatable nucleotides which enable the formation of a transport blocking mesh. Synthetic gated channels that can respond to multiple stimuli as well as have a robust and reversible closing mechanism have been historically difficult to design and are essential to advancing the nanopore field. Finally, a different type of synthetic nanochannel is made from the inner volume of a carbon nanotube. We present a platform that allows for the isolation and study of a single nanotube and use it to examine the underlying transport properties. Carbon nanotube based nanochannels show several unique behaviors which the current literature has not been able to completely explain. Several questions such as the magnitude and origin of enhanced flow and even what carries the current remain open, motivating additional studies, such as ours, which aim to help provide much needed answers.
Nanosensors For Smart Cities
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Author : Baoguo Han
language : en
Publisher: Elsevier
Release Date : 2020-02-13
Nanosensors For Smart Cities written by Baoguo Han and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-13 with Technology & Engineering categories.
Nanosensors for Smart Cities covers the fundamental design concepts and emerging applications of nanosensors for the creation of smart city infrastructures. Examples of major applications include logistics management, where nanosensors could be used in active transport tracking devices for smart tracking and tracing, and in agri-food productions, where nanosensors are used in nanochips for identity, and food inspection, and smart storage. This book is essential reading for researchers working in the field of advanced sensors technology, smart city technology and nanotechnology, and stakeholders involved in city management. Nanomaterials based sensors (nanosensors) can offer many advantages over their microcounterparts, including lower power consumption, high sensitivity, lower concentration of analytes, and smaller interaction distance between object and sensor. With the support of artificial intelligence (AI) tools, such as fuzzy logic, genetic algorithms, neural networks, and ambient-intelligence, sensor systems are becoming smarter. Provides information on the fabrication and fundamental design concepts of nanosensors for intelligent systems Explores how nanosensors are being used to better monitor and maintain infrastructure services, including street lighting, traffic management and pollution control Assesses the challenges for creating nanomaterials-enhanced sensors for mass-market consumer products