A Hierarchically Ordered TiO2 Hemispherical Particle Array with Hexagonal-Non-Close-Packed Tops: Synthesis and Stable Superhydrophilicity Without UV Irradiation

被引：160

作者：

Li, Yue ^{[1
]}

Sasaki, Takeshi ^{[1
]}

Shimizu, Yoshiki ^{[1
]}

Koshizaki, Naoto ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nanoarchitecton Res Ctr NARC, Tsukuba, Ibaraki 3058565, Japan

来源：

SMALL | 2008年 / 4卷 / 12期

基金：

日本学术振兴会;

关键词：

hexagonal-non-close-packed; hierarchical arrays; superhydrophilicity; UV irradiation;

D O I：

10.1002/smll.200800428

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A hierarchical TiO2 ordered hemispherical particle array with hexagonal-non-close-packed (hncp) tops is prepared by pulsed laser deposition (PLD) using a polystyrene colloidal monolayer as a template. Compared with conventional lithography, the route presented has the advantage of low cost for producing hncp nanostructured arrays. This hierarchical particle array exhibits excellent superhydrophilicity with a water contact angle of 0 degrees without further UV irradiation. The superhydrophilic property originates from oxygen defects or vacancies on the surface of the TiO2 nanoparticles produced by PLD and the increased roughness of the hierarchical particle arrays. More importantly, this property is very stable for half a year and could be used in self-cleaning surfaces and microfluidic devices.

引用

页码：2286 / 2291

页数：6

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