Monitoring surface charge movement in single elongated semiconductor nanocrystals -: art. no. 167402

被引：89

作者：

Müller, J

Lupton, JM

Rogach, AL

Feldmann, J

Talapin, DV

Weller, H

机构：

[1] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany

[2] Univ Munich, CeNS, D-80799 Munich, Germany

[3] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.93.167402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate a universal correlation between the spectral linewidth and position of the excitonic transition in the spectral jitter observed from single elongated colloidal quantum dots. Breaking the symmetry of electron and hole confinement as well as of the spatial directions for surface charge diffusion enables us to microscopically track meandering surface charges, providing a novel probe of the particle's nanoenvironment. Spectral diffusion exhibits only a weak temperature dependence, which allows us to uncover the single particle homogeneous linewidth of 50 meV at room temperature.

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页码：167402 / 1

页数：4

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