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
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.
|Subjects:||Physical Science > Nanophysics|
|Deposited By:||Farnush Anwar|
|Deposited On:||23 Dec 2008 12:01|
|Last Modified:||09 Jan 2009 16:22|
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