Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

The Stark effect on the electronic absorption spectrum of CdSe nanocrystals has been studied for nanocrystals ranging in size from 80 to 20 Å in diameter. For all but the smallest clusters, a second derivative line shape is observed, indicative of a dipole moment in the excited state. This result is independent of the surface modification and appears in both CdS and CdSe systems. The Δμ ranges from 15±10 D in the smallest clusters and up to 100±10 D in the largest; however, the increase is not monotonic, and in the very largest clusters studied (d≳70 Å), the dipole moment decreases. The dipolar character is lost in clusters less than 25 Å. These results can be explained by a model in which there is resonance of an interior state with a surface state at a particular size, with the mixing occurring on a preferred axis.

Bibliography

Colvin, V. L., Cunningham, K. L., & Alivisatos, A. P. (1994). Electric field modulation studies of optical absorption in CdSe nanocrystals: Dipolar character of the excited state. The Journal of Chemical Physics, 101(8), 7122–7138.

Authors 3
  1. V. L. Colvin (first)
  2. K. L. Cunningham (additional)
  3. A. P. Alivisatos (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 8:13 a.m.)
Deposited 2 years, 1 month ago (July 10, 2023, 12:58 p.m.)
Indexed 1 year, 3 months ago (June 4, 2024, 10:19 p.m.)
Issued 30 years, 10 months ago (Oct. 15, 1994)
Published 30 years, 10 months ago (Oct. 15, 1994)
Published Print 30 years, 10 months ago (Oct. 15, 1994)
Funders 0

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@article{Colvin_1994, title={Electric field modulation studies of optical absorption in CdSe nanocrystals: Dipolar character of the excited state}, volume={101}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.468338}, DOI={10.1063/1.468338}, number={8}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Colvin, V. L. and Cunningham, K. L. and Alivisatos, A. P.}, year={1994}, month=oct, pages={7122–7138} }