Current Rectification in Temperature‐Responsive Single Nanopores

Guo, Wei; Xia, Hongwei; Xia, Fan; Hou, Xu; Cao, Liuxuan; Wang, Lin; Xue, Jianming; Zhang, Guangzhao; Song, Yanlin; Zhu, Daoben; Wang, Yugang; Jiang, Lei

doi:10.1002/cphc.200900989

Cited by 178 publications

(141 citation statements)

References 65 publications

(111 reference statements)

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“…In nanofluidic systems, the asymmetric geometry functions not only as a pathway for molecular transportation, but also provides a geometric kinetic constraint that possibly induces a unidirectional diffusive flow through the nanopore [59,60]. Studies on the application of geometryinduced asymmetric diffusion for bio-inspired energy conversion and oil/water separation are currently underway in our lab [61][62][63][64].…”

Section: Resultsmentioning

confidence: 98%

Layer-by-layer removal of insulating few-layer mica flakes for asymmetric ultra-thin nanopore fabrication

et al. 2011

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We demonstrate an elaborate method to controllably fabricate ultra-thin nanopores by layer-by-layer removal of insulating few-layer mica flakes with atomic force microscopy (AFM). The fabricated nanopores are geometrically asymmetric, like an inverted quadrangular frustum pyramid. The nanopore geometry can be engineered by finely tuning the mechanical load on the AFM tip and the scanning area. Particularly noteworthy is that the nanopores can also be fabricated in suspended few-layer mica membranes on a silicon window, and may find potential use as functional components in nanofluidic devices.

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Section: Resultsmentioning

confidence: 98%

Layer-by-layer removal of insulating few-layer mica flakes for asymmetric ultra-thin nanopore fabrication

et al. 2011

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“…Inspired by these ion channels, we further explored the ionic rectification current in a conically shaped nanochannel that can respond to temperature [14].…”

Section: A Temperature Responsive Nanochannelmentioning

confidence: 99%

“…By directly immobilizing responsive molecules onto the inner surfaces of the synthetic nanochannel walls, a series of single responsive smart gating nanochannels that respond to a simple external stimulus, such as pH [11,17], ions [13,16], temperature [14], and light have been realized.…”

Section: Single Response Smart Gating Nanochannelsmentioning

confidence: 99%

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Bio-inspired smart gating nanochannels based on polymer films

Wen

Jiang

2011

Sci. China Chem.

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In this review we have summarized some recent results mainly reported by our group that focused on the development of smart gating nanochannels based on polymer films. These nanochannels were prepared using a track-etch process. The responsive materials/molecules and modification methods/techniques have also been demonstrated, from which we have obtained a series of smart gating nanochannels that can respond to single/dual external stimuli, e.g., pH, ion, temperature, light, and so on. These studies utilize responsive behaviors to regulate ionic transport properties inside a single nanochannel and demonstrate the feasibility of designing other smart nanodevices in the future.bio-inspired, smart gating, stimuli-responsive, nanochannel, polymer films

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“…[17] Furthermore, chemical modification with functional molecules on the inner surface of the asymmetric nanopores endows them with versatile responsiveness and adaptiveness. The transmembrane ionic conductance, as well as the ionic rectifying properties, can be finely modulated in response to changes in the environmental conditions, including pH, [18][19][20][21] temperature, [22,23] light, [24,25] and specific molecular targets, [26,27] which mimics the gating and rectifying functions of biological ion channels. In the past decade, two types of asymmetric ion-transport phenomena have been identified in 1D nanofluidic systems, termed the rectified ionic current and the net diffusion current.…”

Section: Ion-channel-mimetic Solid-state Nanoporesmentioning

confidence: 99%

Bioinspired Energy Conversion in Nanofluidics: A Paradigm of Material Evolution

et al. 2017

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fly. Many of the well-developed structurefunction relationships in biological systems have become the inspiration for the design and application of innovative materials. [2,3] This bioinspired learning process accelerates the continuous evolution of novel man-made materials, circumventing many of the previously insurmountable challenges in, for example, architecture, aerodynamics, and materials science, etc. [4] More intriguingly, by adopting various design strategies from different natural inspirations, synthetic materials and devices keep on evolving and gaining more functions. Taking the development of aircraft for example, the wing curve of the prototype airplane mimics the streamlined shape of bird wings so as to reduce aerodynamic drag. The bat uses supersonic-based pathfinding to avoid obstacles when flying at night. Learning from this skill, modern aircraft use radar navigation systems as their "eyes". The adaptive surface coatings of aircraft mimic the micro-and nanostructures of shark skin, which greatly reduces frictional resistance, saving fuel and preventing damage from ultraviolet irradiation. As human beings constantly get new inspiration from nature, the evolution of bioinspired materials never stops.Research in nanofluidic energy conversion is enlightened by the electrogenic cells that convert transmembrane ion-concentration gradients into the release of electrical impulses by membrane-protein-regulated ion transport through the hierarchically arranged ion channels and ion pumps. [5] One particular example is electric eels (Electrophorus electricus), which are capable of generating electric shocks up to 600 V for predation and self-defense (Figure 1). Toward this goal, one research direction is to build synthetic nanofluidic devices with a minimum set of components, yet can mimic the biological energyconversion process on the nanoscale. [6] Another research direction is the multiscale integration of individual nanofluidic devices into macroscopic materials for practical use. [7] Here, we present an overview of the structural and functional evolution in synthetic one-dimensional (1D) and two-dimensional (2D) nanofluidic systems under the guidance of three different types of biological inspiration: the asymmetric ion-transport behaviors of biological ion channels, the strong bioelectric function of electric eels, and the layered microstructure of nacre. The progress, challenges, and future perspectives in this growing field are highlighted.Well-developed structure-function relationships in living systems have become inspirations for the design and application of innovative materials. Building artificial nanofluidic systems for energy conversion undergoes three essential steps of structural and functional development with the uptake of separate biological inspirations. This research field started from the mimicking of the bioelectric function of electric eels, wherein a transmembrane ion concentration gradient is converted into ultrastrong electrical impulses via membrane-protein-regulated ion tran...

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Current Rectification in Temperature‐Responsive Single Nanopores

Cited by 178 publications

References 65 publications

Layer-by-layer removal of insulating few-layer mica flakes for asymmetric ultra-thin nanopore fabrication

Layer-by-layer removal of insulating few-layer mica flakes for asymmetric ultra-thin nanopore fabrication

Bio-inspired smart gating nanochannels based on polymer films

Bioinspired Energy Conversion in Nanofluidics: A Paradigm of Material Evolution

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