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Bioinspired nanofluidic iontronics for brain-like computing

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Nano Research 2024年第2期17卷 503-514页

作者： Lejian Yu Xipeng Li Chunyi Luo Zhenkang Lei Yilan Wang Yaqi Hou Miao Wang Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Institute of Artificial Intelligence Xiamen UniversityXiamen 361005China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Department of BiomaterialsResearch Center of Biomedical Engineering of XiamenCollege of MaterialsXiamen UniversityXiamen 361005China The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Binzhou Institute of Technology Binzhou 256600China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China Engineering Research Center of Electrochemical Technologies of Ministry of Education Xiamen UniversityXiamen 361005China

The human brain performs computations via a highly interconnected network of neurons.Taking inspiration from the information delivery and processing mechanism of the human brain in central nervous systems,bioinspired nanofluidic iontronics has been proposed and gradually engineered to overcome the limitations of the conventional electron-based von Neumann architecture,which shows the promising potential to enable efficient brain-like computing.Anomalous and tunable nanofluidic ion transport behaviors and spatial confinement show promising controllability of charge carriers,and a wide range of structural and chemical modification paves new ways for realizing brain-like functions.Herein,a comprehensive framework of mechanisms and design strategy is summarized to enable the rational design of nanofluidic systems and facilitate the further development of bioinspired nanofluidic iontronics.This review provides recent advances and prospects of the bioinspired nanofluidic iontronics,including ion-based brain computing,comprehension of intrinsic mechanisms,design of artificial nanochannels,and the latest artificial neuromorphic functions devices.Furthermore,the challenges and opportunities of bioinspired nanofluidic iontronics in the pioneering and interdisciplinary research fields are proposed,including brain–computer interfaces and artificial neurons.

关键词： human brain ion transport nanofluidics brain-like computing memristive effect

nanofluidics for single-cell analysis

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Chinese Chemical Letters 2022年第4期33卷 1752-1756页

作者： Zengnan Wu Ling Lin Department of Bioengineering Beijing Technology and Business UniversityBeijing 100048China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

Living single-cell analysis is vital for cell biology, disease pathology, drug discovery and medical treatment. It is of great significance to reveal the law of creature and to explore the mechanism of serious disease. The conventional single cell analysis focuses on a large number of cells or cell lysis, in order to obtain the average information about cells. Therefore, it fails to analyze the real-time and continuous data of differences between the individual cells, thus limiting the development of many fields, such as biomedical. nanofluidics based biochemical analysis exhibits advantages over conventional methods in terms of small sample volume, rapid turnaround time, straightforward operation, and efficient processing,which has been widely used in complex operations such as single cell capture, separation and single cell detection. Here we review the recent developments of nanofluidic technologies for single-cell analysis,with emphasis on cell trapping, treatment, and biochemical studies. The potential of nanofluidics-based single-cell analysis is discussed.

关键词： nanofluidics Single cell Biochemical analysis Microfluidics

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Photothermal regulated ion transport in nanofluidics:From fundamental principles to practical applications

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Nano Research 2023年第7期16卷 10061-10071页

作者： Pei Liu Lei Jiang Liping Wen Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450052China Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Light regulated ion transport across membranes is central to nature.Based on this,artificial nanofluidics with light driven ion transport behaviors has been developed for both fundamental study and practical applications.Here,we focus on recent progress in photothermal controlled ion transport systems and review the corresponding construction strategies in diverse photothermal nanofluidics with various dimensions and structures.We systematically emphasize the three underlying working principles including temperature gradient,water evaporation induced ion transport blockage,and evaporation gradient.On the basis of these fundamental research,photothermal regulated ion transport has been mainly introduced into ionic devices,desalination,and energy conversion.Furthermore,we provide some perspectives for the current challenges and future developments of this promising research field.We believe that this review could encourage further understanding and open the minds to develop new advances in this fertile research field.

关键词： nanofluidics ion transport photothermal conversion ion pump energy conversion

Osmotic-Enhanced-Photoelectrochemical Hydrogen Production Based on nanofluidics

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CCS Chemistry 2023年第9期5卷 2012-2022页

作者： Pei Liu Xiao-Ya Gao Li-Jun Zhang Weipeng Chen Yuhao Hu Xiang-Yu Kong Xu-Bing Li Liping Wen Chen-Ho Tung Li-Zhu Wu Lei Jiang Key Laboratory of Bio-inspired Materials and Interfacial Science Key Laboratory of Photochemical Conversion and Optoelectronic MaterialsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 School of Future Technology University of Chinese Academy of SciencesBeijing 100049

Harvesting clean energy such as solar energy and salinity gradient energy directly from the surrounding environment has attracted great attention.A promising proof-of-concept combination of cation-selective membrane-based osmotic energy with photoelectrochemical-based solar energy has been developed,highlighting the great potential for the direct conversion of osmotic energy to hydrogen energy.With the help of a 50-fold concentration gradient,the MXene-CdSe quantum dots system exhibits the highest photocurrent enhancement ratio(Δ/_(L-H)/Δ/_(L-L)),and the hydrogen production is increased by about 33%at a bias of 0 V versus reversible hydrogen electrode.Directly converting osmotic energy and solar energy into hydrogen energy suggests the possibility of coupling osmotic energy with other renewable energy sources.

关键词： nanofluidics ion transport H2 evolution energy conversion artificial photosynthesis

Intensification of chemical separation engineering by nanostructured channels and nanofluidics: From theories to applications

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Chinese Journal of Chemical Engineering 2019年第6期27卷 1439-1448页

作者： Xiaoyu Hu Diannan Lu State Key Laboratory of Chemical Engineering Key Lab of Industrial BiocatalysisMinistry of EducationChina Department of Chemical EngineeringTsinghua University

With the development of manufacturing technology on the nanoscale, the precision of nano-devices is rapidly increasing with lower cost. Different from macroscale or microscale fluids, many specific phenomena and advantages are observed in nanofluidics. Devices and process involving and utilizing these phenomena play an important role in many fields in chemical engineering including separation, chemical analysis and transmission.In this article, we summarize the state-of-the-art progress in theoretical studies and manufacturing technologies on nanofluidics. Then we discuss practical applications of nanofluidics in many chemical engineering fields,especially in separation and encountering problems. Finally, we are looking forward to the future of nanofluidics and believe it will be more important in the separation process and the modern chemical industry.

关键词： nanofluidics Nanostructured channel Molecular simulation Chemical separation engineering

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Heat transfer of nanofluidics in hydrophilic pores: Insights from molecular dynamics simulations

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1117-1121页

作者： Mingjie Wei Yang Song Yong Wang State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials and College of Chemical EngineeringNanjing Tech University

nanofluidics in hydrophilic nanopores is a common issue in many natural and industrial processes. Among all,the mass transport of nanofluidics is most concerned. Besides that, the heat transfer of a fluid flow in nano or micro channels is always considered with adding nanoparticles into the flow, so as to enhance the heat transfer by convection between the fluid and the surface. However, for some applications with around 1 nm channels such as nano filtration or erosion of rocks, there should be no nanoparticles included. Hence, it is necessary to figure out the heat transfer mechanism in the single phase nanofluidics. Via non-equilibrium molecular dynamics simulations, we revealed the heat transfer inside nanofluidics and the one between fluid and walls by setting simulation into extremely harsh condition. It was found that the heat was conducted by molecular motion without temperature gradient in the area of low viscous heat, while it was transferred to the walls by increasing the temperature of fluids. If the condition back to normal, it was found that the viscous heat of nanofluidics could be easily removed by the fluid-wall temperature drop of less than 1 K.

关键词：非平衡分子的动力学 nanofluidics 热行为温度坡度液体墙热转移

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Water’s motions in x–y and z directions of 2D nanochannels:Entirely different but tightly coupled

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Nano Research 2023年第5期16卷 6298-6307页

作者： Shouwei Liao Qia Ke Yanying Wei Libo Li Guangdong Provincial Key Lab of Green Chemical Product Technology School of Chemistry&Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510640China

Two-dimensional(2D)material-based membrane separation has attracted increasing attention due to its promising performance compared with traditional membranes.However,in-depth understanding of water transportation behavior in such confined nanochannels is still lacking,which hinders the development of 2D nanosheets membranes.Herein,we investigated water confined in graphene or MoS_(2)nanochannels by molecular dynamics(MD)simulations and found water’s diffusivity always varied linearly with their mean square displacement along z direction(Δz^(2))when system variables(e.g.,water molecules’number,channel height,nonbonded interaction parameter,harmonic potential constraining water’s z-coordinate)changed.Such linear correlation applies to different water models and different force fields(FFs)of channel walls(e.g.,different Lennard–Jones parameters or even flexible FF),no matter whether water molecules form 3-,2-,or quasi-2-layer structure in the nanochannel.This indicates,though water molecules’motion along z direction(z-fluctuation,confined within 1 nm)and that in xy plane(xydiffusion)are entirely different,they are tightly coupled:Violent z-fluctuation would produce more transient void to facilitate xydiffusion,which is to the sharp contrary of bulk water,where motions in x,y,z directions are symmetric,but independent.Our work could help design high performance 2D nanochannels and discover more novel principles in nano-fluidics and membrane separation fields.

关键词： graphene membranes nanochannel nanofluidics water diffusion

Enhanced photo-driven ion pump through silver nanoparticles decorated graphene oxide membranes

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Nano Research 2022年第1期15卷 612-616页

作者： Yaping Feng Haoyu Dai Yi Zhang Jianjun Chen Fengxiang Chen Lei Jiang CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Engineering Research Center oj BeijingBeijing University of TechnologyBeijing 100124China Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

Biology systems harvest solar energy to regulate ions and molecules precisely across cell membrane that is essential to maintain their life sustainability.Recently,artificial light-driven directional ion transport through graphene oxide membranes has been established,where the membrane converts light power into a transmembrane motive force.Herein,we report a silver nanoparticles decorated graphene oxide membranes for enhanced photo-driven ionic transport.Asymmetric light stimulated charge carrier dynamics,such as advanced light absorption efficiency,extended lifetime and efficient separation of photo-excited charge carriers,are account for the ion-driven force enhancement.Based on metal nanoparticles decoration,the concept of the guest-interactions of plasmon-enhanced photo-driven ion transport in two-dimentional layered membranes will stimulate broad researches in sensing,energy storage and conversion and water treatment.

关键词： ion pump silver nanoparticles nanofluidics photocurrent

Ionic thermal up-diffusion in nanofluidic salinity-gradient energy harvesting

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National Science Review 2019年第6期6卷 1266-1273页

作者： Rui Long Zhengfei Kuang Zhichun Liu Wei Liu School of Energy and Power Engineering Huazhong University of Science and Technology

Advances in nanofabrication and materials science give a boost to the research in nanofluidic energy harvesting. Contrary to previous efforts on isothermal conditions, here a study on asymmetric temperature dependence in nanofluidic power generation is conducted. Results are somewhat counterintuitive. A negative temperature difference can significantly improve the membrane potential due to the impact of ionic thermal up-diffusion that promotes the selectivity and suppresses the ion-concentration polarization,especially at the low-concentration side, which results in dramatically enhanced electric power. A positive temperature difference lowers the membrane potential due to the impact of ionic thermal down-diffusion,although it promotes the diffusion current induced by decreased electrical resistance. Originating from the compromise of the temperature-impacted membrane potential and diffusion current, a positive temperature difference enhances the power at low transmembrane-concentration intensities and hinders the power for high transmembrane-concentration intensities. Based on the system's temperature response, we have proposed a simple and efficient way to fabricate tunable ionic voltage sources and enhance salinity-gradient energy conversion based on small nanoscale biochannels and mimetic nanochannels. These findings reveal the importance of a long-overlooked element—temperature—in nanofluidic energy harvesting and provide insights for the optimization and fabrication of high-performance nanofluidic power devices.

关键词： energy harvesting ionic thermal up-diffusion ionic voltage source nanofluidics