Dynamic Curvature Nanochannel‐Based Membrane with Anomalous Ionic Transport Behaviors and Reversible Rectification Switch

Wang, Miao; Meng, Haiqiang; Wang, Dan; Yin, Yajun; Stroeve, Pieter; Zhang, Yunmao; Sheng, Zhizhi; Chen, Baiyi; Zhan, Kan; Hou, Xu

doi:10.1002/adma.201805130

Cited by 117 publications

(103 citation statements)

References 82 publications

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“…[32,33] Previous studies have demonstrated that fluid and ion transport in CNT nanochannels is ultra-efficient, [32,34] which could potentially improve the performance of ionotronics. Also, the atomic inner diameter of CNTs is advantageous to mimic natural biological ion channels with similar pore sizes, [35] and the ultralong channel length of CNTs is beneficial for asymmetric modification of charges as well as integration of horizontally aligned chip-scale ionic circuits. Charge modification of CNT-based nanochannels can be readily conducted on the CNT terminals using well-established techniques.…”

Section: Introductionmentioning

confidence: 99%

Ionotronics Based on Horizontally Aligned Carbon Nanotubes

Peng

Pan

et al. 2020

Adv Funct Materials

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Controlled ion transport through ion channels of cell membranes regulates signal transduction processes in biological systems and has also inspired the thriving development of ionic electronics (ionotronics or iontronics) and biocomputing. However, for constructing highly integrated ionic electronic circuits, the integration of natural membrane‐spanning ion channel proteins or artificial nanomembrane‐based ionic diodes into planar chips is still challenging due to the vertically arranged architecture of conventional nanomembrane‐based artificial ionic diodes. Here, a new design of ionic diode is reported, which allows chip‐scale integration of ionotronics, based on horizontally aligned nanochannels made from multiwalled carbon nanotubes (MWCNTs). The rectification of ion transport through the MWCNT nanochannels is enabled by decoration of oppositely charged polyelectrolytes on the channel entrances. Advanced ionic electronic circuits including ionic logic gates, ionic current rectifiers, and ionic bipolar junction transistors (IBJT) are demonstrated on planar nanofluidic chips by stacking a series of ionic diodes fabricated from the same bundles of MWCNTs. The horizontal arrangement and facile chip‐scale fabrication of the MWCNT ionic diodes may enable new designs of complex but monolithic ionotronic systems. The MWCNT ionic diode may also prove to be an excellent platform for investigation of electrokinetic ion transport in 1D carbon materials.

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Section: Introductionmentioning

confidence: 99%

Ionotronics Based on Horizontally Aligned Carbon Nanotubes

Peng

Pan

et al. 2020

Adv Funct Materials

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“…Such precisely prepared materials with nanoscale control on structure and functionalization would allow, for example, new perspectives in sensing. [ 1 ] Further strategies mimicking the functionality of biological channels include dynamic curvature nanochannel‐based membranes to regulate ionic transport [ 2 ] or flexible elastomer‐based microchannels for microfluidic devices. [ 3 ]…”

Section: Introductionmentioning

confidence: 99%

Wetting‐Controlled Localized Placement of Surface Functionalities within Nanopores

Ochs

Mohammadi²,

Vogel³

et al. 2020

Small

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Mimicking such functional control in synthetic nanopores requires precise control of structure and local placement of surface functionality. Such precisely prepared materials with nanoscale control on structure and functionalization would allow, for example, new perspectives in sensing. [1] Further strategies mimicking the functionality of biological channels include dynamic curvature nanochannel-based membranes to regulate ionic transport [2] or flexible elastomer-based microchannels for microfluidic devices. [3] Already today nanoscopically structured materials play a crucial role in applications such as sensors or lab on chip devices, [4] separation, [4d] catalysis, [5] and for the developing of new materials, for example for applications in tissue engineering [6] or for the control of surface wettability. [7] Traditionally, nanostructures are fabricated using top-down approaches like photolithography, ink-jet printing or electrospinning. Alternatively, bottom-up methods, which are based on the self-assembly of molecules or larger building blocks, can yield defined structures with high resolution. [8] Periodic, nanostructured materials are for example accessible through the self-assembly of colloidal building blocks, which can yield macroscopic areas of wellordered colloidal crystals. [9] Such colloidal crystals can be further used as templates to generate inorganic, interconnected nanopore arrays by backfilling with a sol-gel precursor and subsequent removal of the templating particles. [9a,10] In two dimensions, the resulting porous materials are known as inverse colloidal monolayers and their wettability can be adjusted by pore opening angle and surface functionalization. [7e,11] Such structures are ideal model pores due to their uniformity, adjustable pore size and ordered structure.A key step toward multifunctional nanopores with nanolocal control, is the ability to precisely position different functionalities into individual pores. [1a] Therefore, it is necessary to develop strategies for a nanoscale control in manufacturing and functionalization of porous materials. This enables nanopore design with multiple functional and responsive units, individually and precisely placed into each nanopore. [1b] To date, functionalization of porous silica materials is mainly based on postsynthetic functionalization strategies like grafting of silanes from gas or liquid phase or cocondensation of functional building blocks. [12] These approaches generally result in a homogenous functionalization without In the context of sensing and transport control, nanopores play an essential role. Designing multifunctional nanopores and placing multiple surface functionalities with nanoscale precision remains challenging. Interface effects together with a combination of different materials are used to obtain local multifunctionalization of nanoscale pores within a model pore system prepared by colloidal templating. Silica inverse colloidal monolayers are first functionalized with a gold layer to create a hybrid porous ...

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“…Through this curvature-based potential [Eq. ( 3 )] has been used in explaining many abnormal phenomena at micro/nano scales [ 38 , 39 ], the reliability of Eq. ( 3 ) in this case is validated by compared with the surface potential in MD simulation for parameters given above and displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

The speed-locking effect of particles on a graphene layer with travelling surface wave

Wang

2020

Nanoscale Res Lett

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Fast diffusion induced by thermal fluctuation and vibration has been detected at nanoscales. In this paper, the movement of particle on a graphene layer with travelling surface wave is studied by molecular dynamics simulation and theoretical model. It is proved that the particle will keep moving at the wave speed with certain prerequisite conditions, namely speed-locking effect. By expressing van der Waals (vdW) potential between particle and wavy surface as a function of curvatures, the mechanism is clarified based on the puddle of potential in a relative wave-frame coordinate. Two prerequisite conditions are proposed: the initial position of particle should locate in the potential puddle, and the initial kinetic energy cannot drive particle to jump out of the potential puddle. The parametric analysis indicates that the speed-locking region will be affected by wavelength, amplitude and pair potential between particle and wave. With smaller wavelength, larger amplitude and stronger vdW potential, the speed-locking region is larger. This work reveals a new kind of coherent movement for particles on layered material based on the puddle potential theory, which can be an explanation for fast diffusion phenomena at nano scales.

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Dynamic Curvature Nanochannel‐Based Membrane with Anomalous Ionic Transport Behaviors and Reversible Rectification Switch

Cited by 117 publications

References 82 publications

Ionotronics Based on Horizontally Aligned Carbon Nanotubes

Ionotronics Based on Horizontally Aligned Carbon Nanotubes

Wetting‐Controlled Localized Placement of Surface Functionalities within Nanopores

The speed-locking effect of particles on a graphene layer with travelling surface wave

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