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3D-printed mechanically strong and extreme environment adaptable boron nitride/cellulose nanofluidic macrofibers

Nano Research 2023年第5期16卷 7609-7617页

作者： Le Yu Tingting Gao Ruiyu Mi Jing Huang Weiqing Kong Dapeng Liu Zhiqiang Liang Dongdong Ye Chaoji Chen School of Resource and Environmental Sciences Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key LaboratoryWuhan UniversityWuhan 430079China Key Laboratory of Textile Science and Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Interdisciplinary Materials Research Center School of Materials Science and EngineeringTongji UniversityShanghai 201804China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China School of Textile Materials and Engineering Wuyi UniversityJiangmen 529020China

Fibrous nanofluidic materials are ideal building blocks for implantable electrode,biomimetic actuator,wearable electronics due to their favorable features of intrinsic flexibility and unidirectional ion transport.However,the large-scale preparation of fibrous nanofluidic materials with desirable mechanical strength and good environment adaptability for practical use remains challenging.Herein,by fully taking advantage of the attractive mechanical,structural,chemical features of boron nitride(BN)nanosheet and nanofibrillated cellulose(NFC),a scalable and cost-effective three-dimensional(3D)printed macrofiber featuring abundant vertically aligned nanofluidic channels is demonstrated to exhibit a good combination of high tensile strength of 100 MPa,thermal stability of up to 230℃,ionic conductivity of 1.8×10^(−4)S/cm at low salt concentrations(<10^(−3)M).In addition,the versatile surface chemistry of cellulose allows us to stabilize the macrofiber at the molecular level via a facile postcross-linking method,which eventually enables the stable operation of the modified macrofiber in various extreme environments such as strong acidic,strong alkaline,high temperature.We believe this work implies a promising guideline for designing and manufacturing fibrous nanodevices towards extreme environment operations.

关键词： three-dimensional(3D)printing nanofluidic boron nitride cellulose macrofiber

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Light-Driven Ion Transport in nanofluidic Devices:Photochemical,Photoelectric,and Photothermal Effects

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CCS Chemistry 2022年第1期4卷 54-65页

作者： Kai Xiao Oliver G.Schmidt Department of Biomedical Engineering Southern University of Science and Technology(SUSTech)Shenzhen 518055 Center for Materials Architectures and Integration of Nanomembranes(MAIN)Chemnitz University of TechnologyChemnitz 09126 Institute for Integrative Nanosciences Leibniz IFW DresdenDresden 01069

Light-driven ion transport in nanofluidic devices is a phenomenon where ions move unidirectionally by consuming optical energy,either from low concentration to high concentration or vice versa.The light-driven unidirectional ion transport offers intriguing application potential in desalination and ion separation,osmosis energy harvesting,and ionic machines benefiting from the remote noncontact light stimulus.Here,we review recent progress in nanofluidic-based light-driven ion transport systems and emphasize similarities and differences in the three underlying working principles based on photochemical,photoelectric,and photothermal effects.The current challenges and future developments of light-driven ion transport in nanofluidic devices are discussed.We believed that this article encourages further innovation in this exciting and emerging research field.

关键词： nanofluidic artificial ion pump nanochannel ion transport photoelectric effect

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Bionic iontronics based on nano-confined structures

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Nano Research 2023年第9期16卷 11718-11730页

作者： Han Qian Di Wei Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

The Moore’s law in silicone-based electronics is reaching its limit and the energy efficiency of the most sophisticated electronics to mimic the iontronic logic circuit in single-celled organisms is still inferior to their natural counterpart.Unlike electronics,iontronics is widely present in nature,and provides the fundamentals for many life activities through the transmission and conversion of information and energy via ions.Moreover,as nanotechnology and fabrication processes continue to advance,highly efficient iontronics could be enabled by creation of asymmetry from nano-confined unipolar ion transport through various nanohierarchical structures of materials.The introduction of bionic design and nanostructures has made it possible for ions to demonstrate numerous anomalous behaviours and entirely new mechanisms,which are governed by complex interfacial interactions.In this review,we discuss the origins,development,mechanism,and applications of bionic iontronics and analyze the unique benefits as well as the practicality of iontronics from a variety of perspectives.Iontronics,as an emerging field of research with innumerable challenges and opportunities for exploring the theory and applications of ions as transport carriers,promises to provide new insights in many subjects covering energy and sensing,etc.,and establishes a new paradigm in investigating the ionic-electric signal transduction interface for futuristic iontronic logic circuit and neuromorphic computing.

关键词： iontronics electronics nano-confined ion transport nanofluidic asymmetry

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Light-driven directional ion transport for enhanced osmotic energy harvesting

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National Science Review 2021年第8期8卷 178-185页

作者： Kai Xiao Paolo Giusto Fengxiang Chen Ruotian Chen Tobias Heil Shaowen Cao Lu Chen Fengtao Fan Lei Jiang Max Planck Institute of Colloids and Interfaces Department of Colloid Chemistry Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang University State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University State Key Laboratory of Catalysis 2011-iChEMDalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics(DICP)Chinese Academy of Sciences State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Light-driven ion(proton) transport is a crucial process both for photosynthesis of green plants and solar energy harvesting of some archaea. Here, we describe use of a TiO2/C3N4semiconductor heterojunction nanotube membrane to realize similar light-driven directional ion transport performance to that of biological systems. This heterojunction system can be fabricated by two simple deposition steps. Under unilateral illumination, the TiO2/C3N4heterojunction nanotube membrane can generate a photocurrent of about 9 μA/cm~2, corresponding to a pumping stream of ～5500 ions per second per nanotube. By changing the position of TiO2and C3N4, a reverse equivalent ionic current can also be realized. Directional transport of photogenerated electrons and holes results in a transmembrane potential, which is the basis of the light-driven ion transport phenomenon. As a proof of concept, we also show that this system can be used for enhanced osmotic energy generation. The artificial light-driven ion transport system proposed here offers a further step forward on the roadmap for development of ionic photoelectric conversion and integration into other applications, for example water desalination.

关键词： ion pump ion transport nanofluidic porous membrane carbon nitride

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Transport of water through graphene nanochannels

Transport of water through graphene nanochannels

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第十二届全国物理力学学术会议

作者： Heng-An Wu Department of Modern Mechanics CAS Key Laboratory of Mechanical Behavior and Design of MaterialsUniversity of Science and Technology of China

Transport of fluid at the nanoscale is crucial for the design and fabrication of nanofluidic devices.Carbon surfaces,like graphite,were assumed as hydrophobic.However,carbon nanotubes can allow anomalously fast transport of water molecules,from both experimental and theoretical results.In this work,our aim is to investigate(1) whether water molecules can penetrate into ultra-narrow channels between two graphene plates with the gap of less than one nanometer;(2) how about the molecular configuration of water confined in graphene Nanochannels;(3) how about the flow behavior of water in this channel. To achieve above goals,classical MD simulations were carried out with LAMMPS package.In our model a nanochannel,formed between two graphene plates,is connected with a water reservoir. Different sets of parameters of the gap between two graphene plates and initial density of water in the reservoir were used. Our numerical results show that water molecules can penetrate into the nanochannel when the gap reaches above 6.5 A.Interestingly,one layer of water molecules exhibits a two-dimensional lattice order in the channel when the gap is between 6.5 A and 7.5 A.The transport velocity of water through nanochannel is much faster than that predicted from macroscopic fluid dynamics theory. Our graphene channel behaves as hydrophilic,just like carbon nanotube.In fact,this concept fails at molecular scale,due to the different molecular interaction mechanism between water and graphene surface.At nanoscale,monolayer water molecules were confined in the nanochannel.We attribute the fast transport of water to the frictionless carbon surface of the graphene channel. This work would be of great significance to design graphene-based nanofluidic devices.

关键词： graphene nanofluidic molecular dynamics

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