Two-dimensional capillaries assembled by van der Waals heterostructures  

作　　者：Jiaojiao Ma Kaiwen Guan Yu Jiang Yang Cao Sheng Hu 

机构地区：[1]State Key Laboratory of Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials(iChEM),College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [2]Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM),Xiamen 361005,China [3]Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361005,China

出　　处：《Nano Research》2023年第3期4119-4129,共11页纳米研究（英文版）

基　　金：supported from the National Key Research and Development Program of China(Nos.2019YFA0705400,2018YFA0306900,and 2018YFA0209500);the National Natural Science Foundation of China(Nos.21972121,21872114,and 92163103);the Fundamental Research Funds for the Central Universities(Nos.20720210017 and 20720210009).

摘　　要：Research on two-dimensional materials in the past decades has brought many insights of low-dimensional science on a wide range of related topics.As a novel two-dimensional structure,the atomic-scale capillaries which can conceptually be seen as the empty space left by removing few layers of two-dimensional materials from their bulk van der Waals crystals offer a unique platform of investigating physical and chemical processes of ions,molecules,and atoms under two-dimensional confinements.Investigation of many important problems,such as capillary condensation and water network structure that are difficult to be explored experimentally in other confinement structures,has now been accessible;two-dimensional migration of ions,water,and gases shows abnormal transport properties beyond conventional theory prediction;influence of quantum effect to molecule permeation is observable even at room temperature.All these discoveries greatly extend our fundamental understandings of nano-science,and stimulate the development of potential applications.We review the fabrication of these two-dimensional capillaries which are created by the assembly of van der Waals heterostructures,and discuss the ultimate steric effects in the smallest possible confinements.Exotic interactions between capillary interior and confined particles are also summarized.When coupled with external stimuli,these channels exhibit tunable mass transport behaviors,which not only gives feedback to the mechanism understanding but in turn guides the channel structure optimization.

关 键 词：atomic-scale capillaries van der Waals heterostructures two-dimensional materials smallest confinement mass transport 

分 类 号：O62[理学—有机化学]