%0 Journal Article
%T Effects of surface modification on nonlinear optical performance of gold nanoparticles<br>表面修饰基团对金纳米颗粒非线性光学效应的影响研究
%A Zheng Li-Si
%A Feng Miao
%A Zhan Hong-Bing
%A <br>郑立思
%A 冯苗
%A 詹红兵
%J 物理学报
%D 2012
%I 
%X Two kinds of gold nanoparticles with different surface-capping groups (Au-DT and Au-DT-CTAB), 1-dodecanthiol and cetyltrimethylammonium bromide (CTAB) are prepared by a two-phase method. Structures and linear optical properties of the materials are characterized using transmission electron microscopy and ultraviolet--visible absorption spectroscopy. The effects of surface modification on nonlinear optical (NLO) performance and optical limiting behavior of gold nanoparticles are investigated using the open Z-scan technique at a laser wavelength of 532 nm. The results show that Au-DT-CTAB shows an enhanced NLO effect in comparison with Au-DT. The secondary modification with CTAB can not only improve local field enhancement effect but also make the contribution of thermoelectrons to NLO performance of gold nanoparticles on laser irradiation.
%K gold nanoparticles
%K surface modification
%K Z-scan measurement<br>金纳米颗粒
%K 表面修饰
%K Z扫描
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=9B2BCA8CA9CB30DFD1D97541FAE7591D&yid=99E9153A83D4CB11&vid=1D0FA33DA02ABACD&iid=94C357A881DFC066&sid=3C4FDE17A5637F54&eid=3C4FDE17A5637F54&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=18