Nano Archive

Temperature-tuning of near-infrared monodisperse quantum dot solids at 1.5 mu m for controllable Forster energy transfer

Bose, Ranojoy and McMillan, James F. and Gao, Jie and Rickey, Kelly M. and Chen, Chariton J. and Talapin, Dmitri V. and Murray, Christopher B. and Wong, Chee Wei (2008) Temperature-tuning of near-infrared monodisperse quantum dot solids at 1.5 mu m for controllable Forster energy transfer. NANO LETTERS, 8 (7). pp. 2006-2011.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl8011243

Abstract

We present the first time-resolved cryogenic observations of Forster energy transfer in large, monodisperse lead sulfide quantum dots with ground-state transitions near 1.5 mu m (0.8 eV), in environments from 160 K to room temperature. The observed temperature-dependent dipole-dipole transfer rate occurs in the range of (30-50 ns)(-1), measured with our confocal single-photon counting setup at 1.5 mu m wavelengths. By temperature-tuning the dots, 94% efficiency of resonant energy transfer can be achieved for donor dots. The resonant transfer rates match well with proposed theoretical models.

Item Type:Article
Subjects:Physical Science > Nanophysics
ID Code:1873
Deposited By:Farnush Anwar
Deposited On:23 Dec 2008 12:01
Last Modified:09 Jan 2009 16:22

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