%0 Journal Article
%T SURFACE CHARACTER OF TITANIA CHANGED BY EXCIMER LASER<br>准分子激光作用下二氧化钛的表面变性
%A WEN XIAO-MING
%A XIE CHONG-WEI
%A LIN LI-ZHONG
%A CUI YONG-JIE
%A <br>文小明
%A 谢崇伟
%A 林理忠
%A 崔永杰
%J 物理学报
%D 1997
%I 
%X The electric conductivity changes markedly when titania is irradited by a proper-fluence excimer laser, it changes from insulator to semiconductor at room temperature, and its color changes too. Several titania samples before and after irradiation are studied with XRD, XPS and microscopic analyses. It is observed that the changes takes place when proper-fluence excimer laser pulse irradites the surface of titania and the temperature of the surface rises quickly. A thin layer of the irradited area melts quickly and soon resolidifies. This leads oxygen in titania to vacate partly, so the stoichiometry of the sample deviates from the normal value. The laser fluence threshold is estimated by the equation of heat transfer and the result agrees approximately with the experiment.
%K 表面变性
%K 准分子激光
%K 二氧化钛
%K 半导体
%K 激光熔凝
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=23BAA394FB154588B81F86ADB8D7D159&yid=5370399DC954B911&vid=D997634CFE9B6321&iid=5D311CA918CA9A03&sid=1396DEC9DD671DC4&eid=C48302AEE9AFB6AE&journal_id=1000-3290&journal_name=物理学报&referenced_num=3&reference_num=5