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

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（4）
• 页码范围: 97-101
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/4/046801

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 43mJ/m2 for hydrogen-termination and about 60mJ/m2 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.