无机材料学报 ›› 2016, Vol. 31 ›› Issue (5): 523-528.DOI: 10.15541/jim20150512

• 研究论文 • 上一篇    下一篇

一种链珠状SiO2纳米线的制备及分析

马洪兵, 白 华, 薛 晨, 陶鹏飞, 徐群峰, 江 南   

  1. (中国科学院 海洋新材料与应用技术重点实验室, 浙江省海洋材料与防护技术重点实验室, 中国科学院 宁波材料技术与工程研究所, 宁波 315201)
  • 收稿日期:2015-10-20 修回日期:2015-12-07 出版日期:2016-05-20 网络出版日期:2016-04-25
  • 作者简介:马洪兵(1990–), 男, 助理工程师. E-mail: mahongbing@nimte.ac.cn
  • 基金资助:
    宁波市自然科学基金(2014A610009)

Synthesis and Analysis of a New Silica Nanowire Periodically Wrapped by Nano-spheres

MA Hong-Bing, BAI Hua, XUE Chen, TAO Peng-Fei, XU Qun-Feng, JIANG Nan   

  1. (Key Laboratory of Marine New Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protection Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China)
  • Received:2015-10-20 Revised:2015-12-07 Published:2016-05-20 Online:2016-04-25
  • About author:MA Hong-Bing. E-mail: mahongbing@nimte.ac.cn
  • Supported by:
    Natural Science Foundation of Ningbo, China (2014A610009)

摘要:

实验通过硅粉和氯化钙盐高温处理, 以熔融CaCl2高温下产生的蒸气作为特殊的蒸发载体, 在1300℃条件下通过热蒸发法在石墨基板表面获得了具有草坪状排列的特殊形状的纳米线。系列测试分析表明, 该纳米线的直径为50~400 nm, 长度约为几个微米, 且为面心立方结构。另外, 系统分析显示传统的纳米线生长模型如气-液-固(VLS)生长机制不能很好地解释该二氧化硅纳米线在石墨纸上的生长过程, 本文提出的一种增强的气-液-固生长机制, 可以很好地解释上述纳米线的生长过程。

关键词: 二氧化硅, 热蒸发, 草坪, 生长机制

Abstract:

Lawn-like nanowire arrays silica nanowires were grown on graphite substrate by thermal evaporation of silicon powders using vapor from melted CaCl2 as carrier at 1300℃. A series of analysis technique were employed to investigate the as-grown nanowires. The results show that the as-grown silica nanowires are in length of several micron-meters with the diameter ranging from 50-400 nm, which is identified to be face-centered cubic structure. Systematic analyses reveal that the growth models such as classic vapor-liquid-solid(VLS) model are not applicable to explain the growth of silica nanowire periodically wrapped by nano-spheres. Hereby, an extended VLS model is proposed which can perfectly interpret the silica nanowires’ growth on graphite surface.

Key words: silica nanowire, thermal evaporation, lawn-like, growth mechanism

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