一种用于合成具有近红外光致发光和量子限制效应的有机可溶性碲化汞纳米晶体的低温合成方法。

A low-temperature synthesis for organically soluble HgTe nanocrystals exhibiting near-infrared photoluminescence and quantum confinement.

作者信息

Piepenbrock Marc-Oliver M, Stirner Tom, Kelly Stephen M, O'Neill Mary

机构信息

Departments of Chemistry and Physics, University of Hull, Hull HU6 7RX, United Kingdom.

出版信息

J Am Chem Soc. 2006 May 31;128(21):7087-90. doi: 10.1021/ja060721j.

DOI:10.1021/ja060721j

PMID:16719490

Abstract

A new low-temperature, one-pot method is introduced for the preparation of organically passivated HgTe nanocrystals, without the use of highly toxic precursors. The nanocrystals show bright photoluminescence in the infrared telecommunication windows about 1300 and 1550 nm with quantum efficiencies between 55 and 60%. They have a zinc blende structure with a mean particle diameter of 3.4 nm, thus exhibiting quantum confinement effects. Particle growth is self-limited by temperature quenching, so a narrow size distribution is obtained. The measured size of the particles agrees with calculations using the pseudopotential method.

摘要

介绍了一种新的低温一锅法来制备有机钝化的碲化汞纳米晶体，该方法无需使用剧毒前驱体。这些纳米晶体在约1300和1550纳米的红外通信窗口中显示出明亮的光致发光，量子效率在55%至60%之间。它们具有闪锌矿结构，平均粒径为3.4纳米，因此表现出量子限制效应。颗粒生长通过温度猝灭自限，从而获得窄尺寸分布。所测量的颗粒尺寸与使用赝势方法的计算结果相符。