Cooperative Effect of pH-Dependent Ion Transport within Two Symmetric-Structured Nanochannels

Meng, Zheyi; Chen, Yang; Li, Xiulin; Xu, Yanglei; Zhai, Jin

doi:10.1021/acsami.5b00647

Cited by 26 publications

(31 citation statements)

References 60 publications

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“…近年来, 越来越多的研究组以胞间连接通道结构为灵感来源, 构建具有智能响应的多级化纳米通道. 通过将特定的外场响应分子固定在纳米通道内表面来实现通道对电压 [48,49] Meng等 [78] 通过叠加两个具有柱形多孔纳米通道的PET膜, 构建了具有离子选择性的多级化纳米通道 (图13). 控制两个PET膜孔道尺寸或者表面电荷不同, 利用两个通道对于离子输运的协同作用来调节离子整流性.…”

Section: 仿生多级化纳米通道的响应性unclassified

“…For a mixture of 0.5 mol/L NaCl with 0.01 mol/L NaCl, the current density decreases with increasing load resistance, and the corresponding output power density P L reaches a maximum of approximately 0.35 W/m 2 (color online). 图 18 (a) 基于PNP方程计算的理论电荷分布 [78] ; (b) 多级化纳米通道超高离子整流的数值模拟 [36] ; (c) 在恒定电压2 V下记录的带电纳米器件的多级离子传输性质 [47] ; (d) 多级化纳米通道在能量转换体系中的数值模拟 [29] (网络版彩图)…”

Section: 基于仿生多级化纳米通道的能量转换体系unclassified

“…13 (a) PET/PET的多级化纳米通道示意图; (b) 在不同 pH条件下, 多级化纳米通道的整流比[78] (网络版彩图)Figure 13(a) Schematic diagrams of PET/PET heterogeneous nanochannels. (b) Rectification ratio from pH 3/11 to 3/3 and rectification ratio from pH 11/3 to 11/11[78] (color online).…”

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Construction of biomimetic multi-story nanochannel systems and their ionic current behaviors

Zhang¹,

Zhai²

2018

Sci. Sin.-Chim

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Section: 仿生多级化纳米通道的响应性unclassified

Section: 基于仿生多级化纳米通道的能量转换体系unclassified

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Construction of biomimetic multi-story nanochannel systems and their ionic current behaviors

Zhang¹,

Zhai²

2018

Sci. Sin.-Chim

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“…In recent years, nanochannels 1,2 and nanoslits 3,4 have found great interest in experimental and theoretical studies of charge transport and electrokinetic effects in order to improve understanding of charge-selective interfaces for various applications, such as desalination, purification, mixing and energy harvesting. [5][6][7][8][9][10][11][12][13][14][15] Many different aspects of ion and fluid transport in nanochannels have been experimentally investigated, amongst which are the effects of pH, 16,17 temperature, 18 concentration gradients 2 and the electric field distribution. 19 Asymmetric, tapered or conical-shaped nanochannels are interesting for different applications, for use as diodes as mimics of the gating functions of biological ion channels and for microscale energy conversion or nanofluidic sensing devices.…”

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Influence of temperature gradients on charge transport in asymmetric nanochannels

Benneker

Wendt

Lammertink

et al. 2017

Phys. Chem. Chem. Phys.

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Charge selective asymmetric nanochannels are used for a variety of applications, such as nanofluidic sensing devices and energy conversion applications. In this paper, we numerically investigate the influence of an applied temperature difference over tapered nanochannels on the resulting charge transport and flow behavior. Using a temperature-dependent formulation of the coupled Poisson-Nernst-Planck and Navier-Stokes equations, various nanochannel geometries are investigated. Temperature has a large influence on the total ion transport, as the diffusivity of ions and viscosity of the solution are strongly affected by temperature. We find that the selectivity of the nanochannels is enhanced with increasing asymmetry ratios, while the total current is reduced at higher asymmetry cases. Most interestingly, we find that applying a temperature gradient along the electric field and along the asymmetry direction of the nanochannel enhances the selectivity of the tapered channels even further, while a temperature gradient countering the electric field reduces the selectivity of the nanochannel. Current rectification is enhanced in asymmetric nanochannels if a temperature gradient is applied, independent of the direction of the temperature difference. However, the degree of rectification is dependent on the direction of the temperature gradient with respect to the channel geometry and the electric field direction. The enhanced selectivity of nanochannels due to applied temperature gradients could result in more efficient operation in energy harvesting or desalination applications, motivating experimental investigations.

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“…For example, nanochannels fab ricated in elastic materials can respond to an applied pressure, [4] and conical nanochannels in poly(ethylene tereph thalate) (PET) membranes can respond to pH. [5] Thus, it is convenient to achieve simple responsive properties by directly using responsive materials to construct the nano channels. The second route is an indirect method, where functional molecules and materials are modified onto the inner surfaces of nanochannels.…”

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Smart Bioinspired Nanochannels and their Applications in Energy‐Conversion Systems

Fan

Liu

et al. 2017

Advanced Materials

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materials. For example, nanochannels fab ricated in elastic materials can respond to an applied pressure, [4] and conical nanochannels in poly(ethylene tereph thalate) (PET) membranes can respond to pH. [5] Thus, it is convenient to achieve simple responsive properties by directly using responsive materials to construct the nano channels. The second route is an indirect method, where functional molecules and materials are modified onto the inner surfaces of nanochannels. This method can change the physical and chemical properties of nanochannels to make the system more intelligent. [6] Smart bioinspired nano channels with different shapes and compositions have been fabri cated, and these nanochannels can respond to various stimuli, such as pH, [7] light, [8] temperature, [9] specific ions, [10] and mole cules. [11] Compared with their fragile biological counterparts, smart bioinspired nanochannels possess excellent mechanical robustness, controllable geometry, tunable surface properties, and good chemical stability. [12] These advantages make them useful for many potential applications, ranging from molecular filters to biosensors to energy conversion devices. [13] Smart bioinspired nanochannels not only provide a basic research platform to simulate the ion transport process in living bodies, but also boost the generation of energy conver sion devices. In nature, ion channels can be used as switches to regulate mass transport and energy conversion. Learning from nature, numerous energy conversion systems based on artificial ion channels have been devised, [14] which are of great significance for the development of sustainable energy. Here, we summarize recent advances in the fabrication of smart bioinspired nanochannels and highlight their applications in energy conversion systems. Recent Advances in the Fabrication of Smart Bioinspired Nanochannels Materials and TechniquesThe fragility and instability of biological ion channels have motivated the development of smart bioinspired nanochan nels. To satisfy specific application requirements, various materials such as biological, [15] inorganic, [16] organic, [17] and composite materials [18] have been used to fabricate artificial nanochannels. Currently, nanochannels with diverse shapes and structures can be obtained using different techniques and Smart bioinspired nanochannels exhibiting ion-transport properties similar to biological ion channels have attracted extensive attention. Like ion channels in nature, smart bioinspired nanochannels can respond to various stimuli, which lays a solid foundation for mass transport and energy conversion. Fundamental research into smart bioinspired nanochannels not only furthers understanding of life processes in living bodies, but also inspires researchers to construct smart nanodevices to meet the increasing demand for the use of renewable resources. Here, a brief summary of recent research progress regarding the design and preparation of smart bioinspired nanochannels is presented. Moreover, representative applications ...

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Cooperative Effect of pH-Dependent Ion Transport within Two Symmetric-Structured Nanochannels

Cited by 26 publications

References 60 publications

Construction of biomimetic multi-story nanochannel systems and their ionic current behaviors

Construction of biomimetic multi-story nanochannel systems and their ionic current behaviors

Influence of temperature gradients on charge transport in asymmetric nanochannels

Smart Bioinspired Nanochannels and their Applications in Energy‐Conversion Systems

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