期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 117, 期 45, 页码 23928-23937出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp407151f
关键词
-
资金
- NSF [DMS-0935165]
- DOE Office of Basic Sciences [DE-SC0002158]
- NSF NSEC [DMR08-32802]
- Provost's office at the University of Pennsylvania
- I.B.M
- Division Of Mathematical Sciences
- Direct For Mathematical & Physical Scien [0935165] Funding Source: National Science Foundation
We report the use of polarized excitation spectroscopy in the study of the polarized optical properties of II-VI semiconducting nanorods. This technique provides a quantitative measure for analyzing the polarization-dependent electronic structure of ensembles of semiconducting nanoparticles in colloidal solutions. We develop a procedure to quantify the anisotropy of nanorod excitations and the influence of the dielectric environment which yields results in qualitative agreement with theoretical predictions of nanorod absorption properties. Excitation measurements of nanorod ensembles and single-particle excitation and emission polarization measurements are used to interpret ensemble measurements on the molecular frame. At the single-particle level, we find a large dispersion in the angles between excitation and emission polarization curves. This contrasts with the conventional picture of CdSe electronic transitions, in which the crystal axes dictate the symmetry of excitations. Such geometrically heterogeneous excitations suggest that perturbations of the physical structure adjust the polarization properties of individual nanorods from those of an ideal theoretical nanorod.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据