Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第18卷    第8期    总第113期    2008年8月

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文章编号:1004-0609(2008)08-1517-05
ZnO微纳米结构薄膜的光响应润湿性
刘长松,秦优陪,李志文,浦培中,王 玲

(青岛理工大学 机械工程学院,青岛 266033)

摘 要: 利用低温液相技术及氢氟酸的调控作用制备“短棒”、“球形”和“花形等不同形貌的ZnO微纳米结构,研究这些形貌特征的ZnO表面在真空紫外光(VUV)处理后的润湿性变化情况。结果表明,经VUV光照处理后,3种不同形貌的ZnO表面润湿性均发生从疏水(接触角CA120˚)到超亲水的转变(CA~0˚),其变化速度均经历了一个先快后慢的过程。用十八烷基三甲氧基硅烷对ZnO表面进行改性,使ZnO表面覆盖一层自组装单分子膜,则其疏水性有所增强(CA140˚);此时再经VUV光照后,ZnO表面从高疏水到超亲水的转变进程显著变缓。对各种不同微纳米结构ZnO表面进行光润湿性研究,将有助于实现ZnO基质润湿性梯度表面。

 

关键词: ZnO;薄膜;润湿性;微纳米结构;自组装单分子膜;光响应

Photoresponsive wettability of ZnO micro-nanostructure films
LIU Chang-song, QIN You-pei, LI Zhi-wen, PU Pei-zhong, WANG Ling

School of Mechanical Engineering, Qingdao Technological University, Qingdao 266033, China

Abstract:Several ZnO micro-nano structures with different morphologies, such as rods, spheres and flowers, were prepared by means of low temperature liquid method tailored by hydrofluoric acid. Their vacuum-ultraviolet (VUV) photoresponsive wettabilities were focused. With VUV illumination time aging, the wettabilities of all ZnO micro-nanostructures change from high-hydrophobic (contact angle (CA)>120˚) to superhydrophilic (CA−0˚), and all of the water contact angles change with an uneven velocity: fast firstly, and then slowly. If the surfaces of ZnO micro-nanostructures are modified by n-octadecyltrimethoxysilane (ODS), i. e. the surfaces are coated by a self-assembly monolayer, their water contact angles increase (CA>140˚). Also, it takes more time to transmit from high-hydrophobic to superhydrophilic for ZnO surfaces under VUV illumination after they are modified by ODS. All of the results can be helpful to realize ZnO-based wettability-gradient surfaces.

 

Key words: ZnO; thin film; wettability; micro-nanostructure; self-assembly monolayer; photoresponsive

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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