二氧化锗纳米线的制备与喇曼光谱-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

化学与材料科学

二氧化锗纳米线的制备与喇曼光谱

杨瑞丽1，陈晓波2，尹文艳2，董红星2，宋玉哲2，杨合情2*

(1 咸阳师范学院化学系, 陕西咸阳 712000； 2 大分子科学陕西省重点实验室；陕西师范大学化学与材料科学学院，陕西西安 710062)

杨瑞丽，女，副教授，主要从事复合材料方面的研究．

摘要:

以Au作催化剂通过在空气中将金属锗加热到550～800℃，在单质锗表面原位大面积生长出了GeO2纳米线. 采用扫描电镜和激光喇曼光谱对产物进行了表征分析. 结果表明, GeO2纳米线为六方相结构, 长度可达30 μm. 通过改变加热温度, 纳米线的直径可在110～170 nm范围内调节. 提出了可能的生长机理以说明GeO2纳米线的形成. 并且在GeO2纳米线的喇曼光谱中观察到了声子限制效应.

关键词：

GeO2纳米线；固-液-固机理；喇曼光谱

收稿日期：

2007-04-03

中图分类号：

O611．62； TB383

文献标识码：

文章编号：

1672-4291(2008)03-0052-05

基金项目：

国家自然科学基金资助项目(20573072)；教育部博士点基金资助项目(20060718010 )

Doi:

Preparation and Raman spectroscopy of GeO2 nanowires

YANG Rui-li1, CHEN Xiao-bo2, YIN Wen-yan2, DONG Hong-xing2, SONG Yu-zheng2, YANG He-qing2*

(1 Department of Chemistry, Xianyang Teachers College, Xianyang 712000, Shaanxi, China; 2 Key Laboratory for Macromolecular Science of Shaanxi Province, College of Chemistry and Materials Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)

Abstract:

GeO2 nanowires could be in-situ grown on the surface of germanium substrates on a large scale by heating germanium wafers coated with an Au film at 550～800 ℃ in an air atmosphere. The synthesized products were characterized by scanning electron microscopy and Raman spectroscopy. The results showed that these GeO2 nanowires with a hexagonal structure had a controllable diameter in the range of 110～160 nm with 30 micrometers in lengths by varying temperature. A possible mechanism was proposed to account for the growth of GeO2 nanowires, and the effects of phonon confinement on the Raman spectrum of GeO2 nanowires was also observed.

KeyWords:

GeO2 nanowires; solid-liquid-solid mechanism; Raman spectroscopy