摘要
We theoretically and experimentally show that,with water being adsorbed,the graphene oxide(GO)is converted to a spontaneously dynamic covalent material under ambient conditions,where the dominated epoxy and hydroxyl groups are mediated by water molecules to spontaneously break/reform their C–O bonds to achieve dynamic oxygen migration.This dynamic material presents structural adaptivity for response to biomolecule adsorption.Both density functional theory calculations and ab initio molecular dynamics simulations demonstrate that this spontaneously dynamic characteristics is attributed to the adsorption of water molecules,which sharply reduces the barriers of these oxygen migration reactions on GO to the level less than or comparable to the hydrogen bonding energy in liquid water.
作者
Yusong Tu
Liang Zhao
Jiajia Sun
Yuanyan Wu
Xiaojie Zhou
Liang Chen
Xiaoling Lei
Haiping Fang
Guosheng Shi
涂育松;赵亮;孙佳佳;吴园燕;周晓洁;陈亮;雷晓玲;方海平;石国升(College of Physics Science and Technology,Yangzhou University,Jiangsu 225009,China;Key Laboratory of Polar Materials and Devices(Ministry of Education),Department of Optoelectronics,East China Normal University,Shanghai 200062,China;National Facility for Protein Science in Shanghai,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;Department of Optical Engineering,Zhejiang A&F University,Lin’an 311300,China;Department of Physics,East China University of Science and Technology,Shanghai 200237,China;Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;Shanghai Applied Radiation Institute,Shanghai University,Shanghai 200444,China)
基金
Supported by the National Natural Science Foundation of China(Grant Nos.11675138,11705160,11605151,U1832150,U1932123 and 11974366)
the National Science Fund for Outstanding Young Scholars(Grant No.11722548)
the Key Research Program of Chinese Academy of Sciences(Grant No.QYZDJ-SSW-SLH053)
the Fundamental Research Funds for the Central Universities
the Special Program for Applied Research on Supercomputation of the NSFC-Guangdong Joint Fund(the second stage)
Supercomputer Center of CAS
the BL01B Beamline of NFPS at SSRF。
