Molecular dynamics simulations on the wet/dry self-latching and electric fields triggered wet/dry transitions between nanosheets:A non-volatile memory nanostructure  

作　　者：Jianzhuo Zhu Xinyu Zhang Xingyuan Li Qiuming Peng 朱键卓;张鑫宇;李兴元;彭秋明(State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province,Yanshan University,Qinhuangdao 066004,China

出　　处：《Chinese Physics B》2022年第2期135-139,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11704328)。

摘　　要：We design a nanostructure composing of two nanoscale graphene sheets parallelly immersed in water.Using molecular dynamics simulations,we demonstrate that the wet/dry state between the graphene sheets can be self-latched;moreover,the wet→dry/dry→wet transition takes place when applying an external electric field perpendicular/parallel to the graphene sheets(E;/E;).This structure works like a flash memory device(a non-volatile memory):the stored information(wet and dry states)of the system can be kept spontaneously,and can also be rewritten by external electric fields.On the one hand,when the distance between the two nanosheets is close to a certain distance,the free energy barriers for the transitions dry→wet and wet→dry can be quite large.As a result,the wet and dry states are self-latched.On the other hand,an E;and an E;will respectively increase and decrease the free energy of the water located in-between the two nanosheets.Consequently,the wet→dry and dry→wet transitions are observed.Our results may be useful for designing novel information memory devices.

关 键 词：wet/dry properties non-volatile memory nanostructure molecular dynamics simulations 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TP333[自动化与计算机技术—计算机系统结构]