Wettability and Surface Energy of Hydrogen-and Oxygen-Terminated Diamond Films  

作　　者：Zi-Cheng Ma Nan Gao Shao-Heng Cheng Jun-Song Ming-Chao YangPeng Wang Zhi-Yuan Feng Qi-Liang Wang Hong-Dong Li 马子程;高楠;成绍恒;刘钧松;杨名超;王鹏;冯志源;王启亮;李红东(State Key Lab of Superhard Materials,College of Physics,Jilin University,Changchun 130012)

机构地区：[1]State Key Lab of Superhard Materials,College of Physics,Jilin University,Changchun 130012

出　　处：《Chinese Physics Letters》2020年第4期97-101,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.51672102 and 51972135.

摘　　要：The contact angle and surface energy values of diamond are systemically investigated in terms of surface treatments(hydrogen-and oxygen-terminations), structure feature(single crystal diamonds and polycrystalline diamond films), crystal orientation((100),(111) and mixed(100)/(111) orientations), different fluids(probes of polar deionized water and nonpolar di-iodomethane). It is found that the hydrophobic/hydrophilic characteristic and surface energy values of diamond are mainly determined by the surface hydrogen/oxygen termination, and less related to the structural features and crystal orientation. Based on the contact angle values with polar water and nonpolar di-iodomethane, the surface energies of diamond are estimated to be about 43 m J/m^2 for hydrogen-termination and about 60 m J/m^2 for oxygen-termination. Furthermore, the varying surface roughness of diamond and fluids with different polarities examined determine the variation of contact angles as well as the surface energy values. These results would be helpful for a more detailed understanding of the surface properties of diamond films for further applications in a broad number of fields, such as optical and microwave windows,biosensors, and optoelectronic devices, etc.

关 键 词：TERMINATION OXYGEN ROUGHNESS 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TQ163[化学工程—高温制品工业]