Semiconductor nanocrystal quantum dots on single crystal semiconductor substrates: High resolution transmission electron microscopy

被引：23
|
作者：
Konkar, A [1 ]
Lu, SY
Madhukar, A
机构：
[1] Univ So Calif, Nanostruct Mat & Devices Lab, Dept Mat Sci, Los Angeles, CA 90089 USA
[2] Univ So Calif, Dept Phys, Los Angeles, CA 90089 USA
来源：
NANO LETTERS | 2005年 / 5卷 / 05期
关键词：
D O I：
10.1021/nl0502625
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report on high-resolution transmission electron microscope structural studies of InAs colloidal semiconductor nanocrystal quantum dots (NCQDs) on ultrathin GaAs (001) semiconductor single-crystal substrates. We employ a benign method for preparing electron transparent specimens that is suitable for the study of such fragile samples. The image contrast comprises contributions from electron scattering from both the NCs and the GaAs substrate. Long-term electron exposure studies reveal different damage mechanisms operative in the nanocrystals and the substrate.
引用
收藏
页码：969 / 973
页数：5
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