Controllable Nucleation of Nanobubbles at a Modified Graphene Surface  

作　　者：马旺国 张萌 聂雪川 王春雷 方海平 贺梦冬 张立娟 

机构地区：[1]Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha 410004 [2]Division of Interracial Water and Key Laboratory of Interracial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800 [3]Shanghai Synchrotron Radiation Facility, Shanghai 201204 [4]niversity of Chinese Academy of Sciences, Beijing 100049

出　　处：《Chinese Physics Letters》2015年第4期77-80,共4页中国物理快报（英文版）

基　　金：Support by the National Natural Science Foundation of China under Grant Nos 11079050,11174372,11290165 and 11305252;the Program of the Chinese Academy of Sciences under Grant Nos KJCX2-EW-W09 and KJZD-EW-M03

摘　　要：The properties of nanoscale gas bubbles at the solid/water interface have been investigated for more than 20 years. However, the stability of nanobubbles remains far from being understood. How to control the formation of nanobubbles is the key issue for understanding their long lifetime. In this work, using molecular dynamics simulations we modify the substrate （graphene） with charge dipoles in which the local properties of the surface could be changed. Nanobubbles could be stabilized on the local hydrophobic area and modified area with the hydrophilic boundary where gas nuclei are deposited beforehand. Those results provide two methods to control the nucleation of gas nanobubbles and fix them on a target area.The properties of nanoscale gas bubbles at the solid/water interface have been investigated for more than 20 years. However, the stability of nanobubbles remains far from being understood. How to control the formation of nanobubbles is the key issue for understanding their long lifetime. In this work, using molecular dynamics simulations we modify the substrate （graphene） with charge dipoles in which the local properties of the surface could be changed. Nanobubbles could be stabilized on the local hydrophobic area and modified area with the hydrophilic boundary where gas nuclei are deposited beforehand. Those results provide two methods to control the nucleation of gas nanobubbles and fix them on a target area.

关 键 词：Controllable Nucleation of Nanobubbles at a Modified Graphene Surface 

分 类 号：O613.71[理学—无机化学] O647.11[理学—化学]