材料科学
单层
润湿
涂层
氮化硼
接触角
石墨烯
六方氮化硼
化学工程
吸附
纳米技术
热稳定性
复合材料
有机化学
工程类
化学
作者
Xuemei Li,Hu Qiu,Xiaofei Liu,Jun Yin,Wanlin Guo
标识
DOI:10.1002/adfm.201603181
摘要
Hexagonal boron nitride (h‐BN), a wide band gap monolayer crystal with structure similar to graphene, is optically transparent with exceptionally high thermal and chemical stability, and should be ideal to serve as an atomically thin coating. However, limited by the challenges in fabricating h‐BN of high quality in large area, the wetting performance of h‐BN has seldom been studied. Here, it is shown that the water contact angle of freshly grown h‐BN film is nearly independent of the underlying materials as well as the h‐BN layer number, but increases gradually to a saturated stable value in air due to the spontaneous adsorption of airborne hydrocarbon. First‐principles calculations and molecular interaction modeling confirm that a monolayer h‐BN coating does efficiently tune the interaction of a water molecule with different substrates to a converging level. The saturated wettability of h‐BN coating is robust against variation of several factors, facilitating its practical applications.
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