Effects of crystal shape on the energy levels of zero-dimensional PbS quantum dots

被引：73

作者：

Hens, Z

Vanmaekelbergh, D

Stoffels, EJAJ

van Kempen, H

机构：

[1] Univ Utrecht, Debye Inst, NL-3508 TA Utrecht, Netherlands

[2] Univ Nijmegen, Inst Mat Res, NL-6525 ED Nijmegen, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 23期

关键词：

Energy level spectra;

D O I：

10.1103/PhysRevLett.88.236803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nanometer-size PbS quantum dots have been made by electrodeposition on a Au(111) substrate. The deposited nanocrystals have a flattened cubic shape. We probed the single-electron energy-level spectrum of individual quantum dots by scanning tunneling spectroscopy and found that it deviates strongly from that of spherical PbS quantum dots. The measured energy-level spectrum is successfully explained by considering strong confinement in a flattened cubic box.

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页码：2368031 / 2368034

页数：4

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