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Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
近红外光发光 Ag2S 量子点来自单一的源前体
1i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, PR China.
Journal of the American Chemical Society
|January 19, 2010
概括
单分散硫化银 (Ag2S) 量子点是使用热解方法合成的. 这些均的,基覆盖的Ag2S量子点呈现近红外辐射,使它们适合各种应用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 量子点合成 量子点合成
背景情况:
- 量子点 (QD) 是半导体纳米晶体,其光学和电子性能取决于尺寸.
- 硫化银 (Ag2S) 量子点因其近红外 (NIR) 发射特性而引起兴趣.
- 开发单分散和统一的QD对于可重复性性能至关重要.
研究的目的:
- 为了合成单分散硫化银 (Ag2S) 量子点.
- 为了描述合成的Ag2S量子点的尺寸和光学特性.
- 为了证明这些QDs的近红外发射能力.
主要方法:
- 银二甲基二甲基酸盐 (Ag(DDTC)) 前体的热解.
- 使用油酸,八甲基胺和1-八甲基作为封装和溶剂剂.
- 量子点大小和光学辐射特性的表征.
主要成果:
- 成功合成了单分散的Ag2S量子点,其均大小为10.2nm.
- 实现了Ag2S量子点的基封闭.
- 通过785nm光激发后在1058nm观察到近红外辐射.
结论:
- 热解法为合成单分散的Ag2S量子点提供了一个可行的途径.
- 合成的Ag2S量子点显示可调节的近红外辐射.
- 这些均的Ag2S量子点显示了需要NIR发射的应用的潜力.
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