合成InAs/CdSe/ZnSe核心/外1/外2结构,具有明亮而稳定的近红外光
Assaf Aharoni1, Taleb Mokari, Inna Popov
1Institute of Chemistry, and the Center for Nanoscience and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Journal of the American Chemical Society
|January 5, 2006
概括
合成的InAs/CdSe/ZnSe核心/外/外纳米晶体具有高光量子产量和光稳定性. 这些近红外染色体显示出对生物标记和光电子技术的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 量子点就是量子点.
背景情况:
- 半导体纳米晶体 (量子点) 对光电子和生物成像至关重要.
- 核心/外结构中的压力通常会限制光效率和外厚度.
研究的目的:
- 为了合成和描述一个新的InAs/CdSe/ZnSe核心/外/外 (CSS) 结构.
- 为了提高光量子产量和基于InAs的纳米晶体的光稳定性.
主要方法:
- 在InAs/CdSe/ZnSe CSS结构的层层合成.
- 使用传输电子显微镜 (TEM),X射线衍射 (XRD) 和X射线光电子谱学 (XPS) 的表征.
主要成果:
- 在小的InAs/CdSe/ZnSe CSS纳米晶体中实现了超过70%的量子产量.
- 证明了更好的光稳定性和成功转化为水性环境.
- 观察到随着InAs核心大小的增加,量子产量下降.
结论:
- CdSe缓冲层有效地减少了应变,使 ZnSe 更厚,提高了性能.
- 在As/CdSe/ZnSe CSS纳米晶体中,有望用于生物应用和光电子设备的近红外光体.
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