플라즈마 조사에 의한 전기분무합성 SiO2 코팅층의 물접촉각 변화

서지정보

ㆍ발행기관 : 한국재료학회 ㆍ수록지정보 : 한국재료학회지 / 24권 / 11호
ㆍ저자명 : 김재훈, 이준성, 김지영, 김상섭

영어 초록

Hydrophilic SiO2 layers were obtained by the atmospheric-pressure plasma treatment. Superhydrophobic SiO2 layers were first deposited by the electrospray deposition method. The electrospunable solution that was prepared based on the solgel method was sprayed on Si (100) substrates. The surface of the electrosprayed SiO2 layers consisted of the agglomeration of nano-sized grains, which led to a very high roughness and revealed a very high contact angle to water droplets over 162˚. After having been exposed to the atmospheric Ar/O2 plasma, the observed superhydrophobicity of the SiO2 layers were greatly changed: a dramatic variation of the water contact angle from 162˚ to 3˚, namely realization of superhydrophillicity. Interestingly, the surface microstructure was almost preserved. According to the XPS analysis, it is more likely that thanks to the plasma exposure, the surface of SiO2 layers will be cleaned in terms of organic species that are hydrophobic-inducing, consequently leading to the hydrophilic nature observed for the plasma-exposed SiO2 layers.

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