制备高度分散的核心/外型泰坦纳米囊,其中含有单个Ag纳米粒子
Hideki Sakai1, Takashi Kanda, Hirobumi Shibata
1Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan. hisakai@rs.noda.tus.ac.jp
Journal of the American Chemical Society
|April 13, 2006
概括
研究人员用单个银纳米粒子核心创建了核心/外titania纳米囊. 这种新型结构,具有10纳米的银芯和5-10纳米的外,显示了先进纳米材料的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 化学 化学 化学
背景情况:
- 银纳米粒子表现出独特的光学特性.
- 泰坦 (TiO2) 是一种多功能材料,在催化和涂料中具有应用.
- 控制纳米粒子形态对于调整属性至关重要.
研究的目的:
- 为了合成核心/外titania纳米囊与单个银纳米粒子核心.
- 描述合成纳米囊的形态和结构.
- 为了研究金涂层对银纳米粒子光学特性的影响.
主要方法:
- 银纳米颗粒通过使用氨酸和甲 (CTAB) 的化和化 (Hydrazine) 的化学降解来合成.
- 核心/外纳米囊使用四二氧化物 (TTIP) 的sol-gel反应在CTAB涂层的银纳米粒子周围制备.
- 发射电子显微镜 (TEM) 用于形态表征.
主要成果:
- 成功合成核心/外titania纳米囊与一个单一的银纳米粒子核心.
- 银芯尺寸大约为10纳米,外厚度为5-10纳米.
- 纳米囊分散得很好,没有聚合,而泰坦涂层诱导了银纳米颗粒表面等离子体吸收的红移.
结论:
- 这项研究展示了一种可行的方法,用于创建定义良好的银@泰坦尼亚核心/外纳米结构.
- 由此产生的纳米囊具有可控的大小和良好的分散性.
- 观察到的光学转移表明,在对等离子体共振敏感的区域有潜在的应用.
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