Mimicking how plants control CO2 influx: CO2 activation of ion current rectification in nanochannels

Xu, Yanglei; Zhang, Minghui; Tong, Tian; Shang, Ying; Meng, Zheyi; Jiang, Jiaqiao; Zhai, Jin; Wang, Yao

doi:10.1038/am.2015.98

Cited by 17 publications

(19 citation statements)

References 47 publications

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“…However, the light‐receptive hydrogel system has a disadvantage in that the reaction rate is slow and is sensitive to moisture. In addition, Xu et al reported the reversible generation of a CO 2 ‐activated chemical reaction by an asymmetric pore surface modified with amidine groups …”

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Stomata‐Inspired Photomechanical Ion Nanochannels Modified by Azobenzene Composites

Chun

Son

et al. 2018

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A low-powered and highly selective photomechanical sensor system mimicking stomata in the epidermis of leaves harvested from nature is demonstrated. This device uses a light-responsive composite consisting of 4-amino-1,1'-azobenzene-3,4'-disulfonic acid monosodium salt (AZO) and poly(diallyldimethylammonium chloride) (PDDA) coated on a membrane with tens of nanometer-size pores. The ionic current change through the pore channels as a function of pore size variation is then measured. The tran-cis isomerism of AZO-PDDA during light irradiation and the operation mechanism of photomechanical ion channel sensor are discussed and analyzed using UV-vis spectroscopy and atomic force microscopy analysis. It presents the discriminative current levels to the different light wavelengths. The response time of the photoreceptor is about 0.2 s and it consumes very low operating power (≈15 nW) at 0.1 V bias. In addition, it is found that the change of the pore diameter during the light irradiation is due to the photomechanical effect, which is capable of distinguishing light intensity and wavelength.

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confidence: 99%

Stomata‐Inspired Photomechanical Ion Nanochannels Modified by Azobenzene Composites

Chun

Son

et al. 2018

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“…Inspired by stomatal closure in response to CO 2 during photo synthesis, our group first reported CO 2 induced ionic current rectification in gas-liquid-solid three phase interactions based on conical PET nanochannels (Figure 4c i), but the highest rec tification ratio was only 4.60. [52] Then, we demonstrated CO 2 activated nanochannels grafted with a CO 2 responsive polymer (Figure 4c ii). By bubbling CO 2 , the modified nanochannels exhibited an "on" state with an extremely high ion rectification ratio up to 23.…”

Section: Functional Modification Of Smart Bioinspired Nanochannelsmentioning

confidence: 91%

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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“…The gas responsive nanochannels: CO 2 ‐responsive nanochannels (A, B, C); CO‐responsive nanochannel (D); NO‐responsive nanochannel (E). (a) Reproduced with permission from , copyright 2015, Nature Publishing Group; (b) Reproduced with permission from , copyright 2015, Wiley‐VCH; (c) Reproduced with permission from , copyright 2016, Wiley‐VCH; (d) Reproduced with permission from , copyright 2016, Wiley‐VCH; (e) Reproduced with permission from , copyright 2018, American Chemical Society.…”

Section: Single Responsive Biomimetic Smart Nanochannelsmentioning

confidence: 99%

Biomimetic stimuli‐responsive nanochannels and their applications

Zhai

2019

Electrophoresis

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Biomimetic smart nanochannels have been studied extensively to achieve the precise ionic transport compared to biological ion channels. Similar to ion channels in living organisms, biomimetic smart nanochannels can respond to various stimuli, which allows for promising applications in many fields. In this review, we mainly summarize the recent advances in the design of biomimetic stimuli‐responsive nanochannels and their potential applications including biosensors and drug delivery. Finally, an outlook on the challenges and opportunities for biomimetic stimuli‐responsive nanochannels is provided.

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Mimicking how plants control CO2 influx: CO2 activation of ion current rectification in nanochannels

Cited by 17 publications

References 47 publications

Stomata‐Inspired Photomechanical Ion Nanochannels Modified by Azobenzene Composites

Stomata‐Inspired Photomechanical Ion Nanochannels Modified by Azobenzene Composites

Smart Bioinspired Nanochannels and their Applications in Energy‐Conversion Systems

Biomimetic stimuli‐responsive nanochannels and their applications

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