Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 113, Issue 45, Pages 19468-19474Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp906827m
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Funding
- Royal Society
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We investigate the size-dependent optical absorption coefficients of CdSe nanocrystals at both the band-edge and high within the absorption profile. The absorption properties in both of these regions must be self-consistent to ensure accuracy of the measured coefficients. By combining transmission electron rnicroscopy and inductively coupled plasma-optical emission spectroscopy, we map out the optical absorption properties and establish reliable size-dependent band-edge calibration curves. The measured absorption properties are compared to a simple 0D confinement model, to classical theory based on light absorption by small particles in a dielectric medium and to state-of-the-art atomistic semiempirical pseudopotential modeling. The applicability of these newly established calibration Curves is demonstrated by analyzing the nucleation and growth kinetics of CdSe nanocrystals in solution.
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