摘要
界面水在自然界和工业发展中无处不在,其结构以及动态性质在众多的界面反应中起着重要的作用.因此,研究固体界面上水的微观结构和动态行为对理解水-固界面上诸多奇特的物理与化学性质十分关键.二维材料限域水是近年来新兴的一类界面水研究对象,即利用超薄的二维材料作为覆盖层,以扫描探针显微镜(scanning probe microscopy,SPM)技术对基底上的水分子进行表征,突破了长期以来SPM对界面水研究中易产生扰动的限制,开辟了在大气条件下研究界面水的新道路.本文简述了近年来SPM在二维材料限域水领域的研究进展,包括对限域水结构的成像、动态行为的探测、限域水的纳米操纵,以及限域水对上层二维材料性质的影响等,同时对二维材料限域水SPM研究面临的挑战和未来的研究方向,以及相关的应用前景作了展望.
Interfacial water is ubiquitous in nature and industry,which plays a crucial role in areas such as wetting,corrosion,lubrication and electrochemistry.The structure and dynamic behavior of interfacial water have been proven to be different from those of bulk water.Therefore,to deeply understand the unique properties of interfacial water,structural imaging with atomic resolution is of great importance.Up to now,owing to its high temporal and spatial resolution,scanning probe microscopy(SPM)has been extensively applied to investigate water molecules at solid interfaces.However,most of those SPM investigations are conducted at cryogenic temperature or under ultra-high vacuum,as under ambient conditions the capillary force between SPM tip and water molecules will perturb the structures of interfacial water on solid surface.Thanks to the two-dimensional(2D)materials which can be utilized as ultra-thin coatings owing to its atomic thickness,good flexibility,impermeability and chemical stability.The graphene coating could protect and fix the structures of interfacial water,which enables the structural imaging by SPM.The 2D material confined water expands the scope of SPM research on interfacial water,promoting the development of interface science.The structure and dynamics of 2D material confined water can be influenced by the structure and hydrophilicity of the interface materials,as well as environment factors such as humidity,temperature and pressure.In recent years,a great deal of works have been conducted with SPM to explore the properties of 2D material confined water and remarkable research results have been achieved.In this review,we will introduce recent progress in probing 2D materials confined water by SPM under ambient conditions,including detecting the microscopic structures of 2D confined water,probing the dynamic behaviors of 2D confined water as well as nanomanipulation of 2D confined water.Furthermore,the effects of confined water on the optical,electrical and frictional properties of the 2D material coa
作者
洪月
李强
Yue Hong;Qiang Li(Key Laboratory of Colloid and Interface Chemistry of Ministry of Education,School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,China)
出处
《科学通报》
EI
CAS
CSCD
北大核心
2021年第14期1689-1702,共14页
Chinese Science Bulletin
基金
国家自然科学基金(21703119)
山东省自然科学基金(ZR2017MB036)资助。
关键词
二维材料
限域水
扫描探针技术
操纵
电学掺杂
摩擦
two-dimensional materials
confined water
scanning probe microscopy
manipulation
electrical doping
friction
