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›› 2006, Vol. 6 ›› Issue (2): 323-326.

• 材料工程专栏 • 上一篇    下一篇

水热合成法制备高长径比的银纳米线

徐建,韩霞,周丽绘,刘洪来,胡英   

  1. 华东理工大学化学系
  • 出版日期:2006-04-20 发布日期:2006-04-20

A Hydrothermal Approach to the Synthesis of Silver Nanowires with High Aspect Radios

XU Jian,HAN Xia,ZHOU Li-hui,LIU Hong-lai,HU Ying   

  1. Department of Chemistry, East China University of Science and Technology
  • Online:2006-04-20 Published:2006-04-20

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摘要： 以季铵盐型阳离子Gemini表面活性剂[C16H33(CH3)2N+(CH2)3N+(CH3)2C16H33]×2Br-(16-3-16)为结构导向剂和稳定剂，以六次甲基四胺为还原剂，用水热合成法由硝酸银制备了直径约30 nm、长约50 mm的银纳米线. 用X射线衍射(XRD)、紫外-可见吸收光谱和透射电子显微镜(TEM)等手段对制备产物的表征结果表明，所得银纳米线具有面心立方结构，并且是沿着{111}晶面生长的. 银纳米线的长度与反应时间有关，而直径则变化不大. 反应温度对产物的形貌有较大影响，在100和120℃下得到的是纳米线，而在150℃下得到的多为不规则的纳米颗粒.

关键词: 银纳米线, Gemini表面活性剂, 水热合成, 纳米结构

Abstract: Silver nanowires were successfully synthesized by the hydrothermal route using methenamine as reducing agent, in which cationic Gemini surfactant 1,3-bis(cetyldimethylammonium) propane dibromide (16-3-16) was used as structure-directing agent and stabilizer. The obtained silver nanowires were of high aspect ratios, with an average diameter of ~30 nm and length up to 50 mm. The as-prepared silver nanowires were characterized by X-ray diffraction (XRD), UV-visible absorption spectrum and transmission electron microscope (TEM). The as-prepared silver nanowires had face-centered cubic structure and grew along {111} direction. The effects of various reaction time and temperature on the sample morphology were investigated. With the reaction time prolonging, the length of silver nanowires increased gradually while the diameter changed slightly. Silver nanowires with high aspect radios were obtained at 100 and 120℃, but only irregular particles were produced at 150℃.

Key words: silver nanowires, Gemini surfactant, hydrothermal synthesis, nanostructure