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Synthesis of In37P20(O2CR)51 Clusters and Their Conversion to InP Quantum Dots
Published on: May 7, 2019
印度氧化物的压力诱导分解
Aleksander Gurlo1, Dmytro Dzivenko, Miria Andrade
1Fachbereich Material- und Geowissenschaften, Technische Universität Darmstadt, Petersenstr. 23, 64287 Darmstadt, Germany. gurlo@materials.tu-darmstadt.de
Journal of the American Chemical Society
|August 25, 2010
概括
在室温下,高压将氧化转化为金属. 这种不可逆转的分解,通过各种技术得到证实,改变了材料.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 高压物理 高压物理
背景情况:
- 氧化 (In(OH) 3) 通常是一种白色的宽带间隙半导体.
- 了解高压等极端条件下的材料行为对于发现新的特性和应用至关重要.
研究的目的:
- 为了研究静态压力在环境温度下对氧化的影响.
- 描述压缩和解压缩引起的结构和电子变化.
主要方法:
- 高压X射线衍射 (XRD) 用于确定结构变化和晶格参数.
- 传输电子显微镜 (TEM) 用于观察微观结构的演变.
- 拉曼光谱和里埃变换红外光谱 (FTIR) 用于分析振动和电子特性.
主要成果:
- 将c-In(OH) 3压缩到34 GPa,导致格子参数和特异体积显著下降.
- 印氧化晶体被碎碎,颗粒大小缩小到大约5纳米.
- 快速解压导致不可逆转的部分分解成金属,由光学和电子性质的变化证明.
结论:
- 静态压力在室温下诱导氧化的相变为金属.
- 在解压过程中,分解是由局部应力梯度驱动的.
- 转换后的材料表现出金属特性,与最初的半导体状态不同.
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