DANG Kun (1987-), male, Lecturer. E-mail: dangkun2020@126.com
The tetrahedral amorphous carbon (ta-C) films were fabricated by 45° double-bent filtered cathodic vacuum arc technique, and the wettability, surface energy, roughness, surface topography, friction coefficient and microstructure evolution of ultrathin ta-C film as functions of incident angles of carbon ions were investigated. The results reveal that as the incident angle of carbon ions increases from 0° to 60°, the water contact angle of films slightly increases from 77.6° to 82.4° and the glycerin contact angle of films slightly increases from 64.7° to 71.2°, indicating that all the films are hydrophilic. The total surface energy decreases from 33.9 mJ/m2 to 28.0 mJ/m2. The slight increase of observed contact angle is attributed to the decrease of surface energy and increase of surface roughness. Also, the average friction coefficient increases from 0.140 to 0.217. According to the near edge X-ray absorption fine structure data, little change for the hybridized sp3 bond content in the deposited ta-C films appears, regardless of the change of incident angle in a range of 0°-60°.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |