中国科技论文在线

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2005年03月07日

【期刊论文】Synthesis and Properties of Tadpole-Shaped Gold Nanoparticles

田中群， Jianqiang Hu， Yong Zhang， Bo Liu， Jinxuan Liu， Haihui Zhou， Yunfeng Xu， Yuxiong Jiang， Zhilin Yang， and Zhong-Qun Tian*

J. AM. CHEM. SOC. 2004, 126, 9470-9471，-0001，（）：

-1年11月30日

摘要

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2005年03月07日

【期刊论文】A Simple and Effective Route for the Synthesis of Crystalline Silver Nanorods and Nanowires**

田中群， By Jian-Qiang Hu， Qing Chen， Zhao-Xiong Xie， Guo-Bin Han， Rui-Hong Wang， Bin Ren， Yong Zhang， Zhi-Lin Yang， and Zhong-Qun Tian*

Adv, Funct. Mater. 2004, 14, No.2, February，-0001，（）：

-1年11月30日

摘要

A simple and effective approach to the aqueous-phase synthesis of crystalline silver nanorods and nanowires is demonstrated, using which their diameters and aspect ratios can be effectively controlled. The synthesis involves a template-less and non-seed process to high-quality nanoparticles, which is low-cost and proceeds at moderate temperatures. The nanorods and nanowires were synthesized by the reduction of silver nitrate with tri-sodium citrate in the presence of sodium dodecylsulfonate. The concentration of tri-sodium citrate plays a critical role while sodium dodecylsulfonate, as a capping agent, only plays an assistant role in controlling the diameters and aspect ratios of the products. High-resolution transmission electron microscopy (HRTEM) and selected-area electron diffraction (SAED) investigations show that the silver nanocrystals are generated with a twinned crystalline structure. We also put forward a primary experimental model to shed light on their growth mechanisms.

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2005年03月07日

【期刊论文】In situ monitoring of Raman scattering and photoluminescence from silicon surfaces in HF aqueous solutions

田中群， B. Ren， F. M. Liu， J. Xie， B. W. Mao， Y. B. Zu， and Z. Q. Tian a)

Appl. Phys. Lett., Vol. 72, No.8, 23 February 1998，-0001，（）：

-1年11月30日

摘要

In situ Raman spectra of SiHx, Si-F, and Si–Si vibrations from Si surfaces in HF aqueous solutions are obtained using a highly sensitive confocal microprobe Raman system. Electrochemical roughening pretreatment and laser-assisted roughening procedure enable good quality surface Raman spectra to be obtained. The surface Raman and photoluminescence spectra from the Si surface in the etching environment and the correlation of the two types of spectra are discussed. The Raman spectroscopy is shown to have high potential in serving as an important tool for in situ investigating of Si surface bonding during the etching process.