Journal of the American Chemical Society, volume 128, issue 31, pages 10337-10346

Size-Dependent Extinction Coefficients of PbS Quantum Dots

Ludovico Cademartiri 1
Erica Montanari 1
G. Calestani 1
Andrea Migliori 1
Antonietta Guagliardi 1
G A. Ozin 1
Publication typeJournal Article
Publication date2006-07-18
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor15
ISSN00027863, 15205126
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
We report here on a detailed study on PbS colloidal quantum dots. A characterization via X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) allowed us to reliably determine the diameter and the shape of the nanocrystals. These data, together with second-derivative analysis of the absorption spectra, allowed us to determine the size dependence of seven transitions in the absorption spectrum; some of these transitions were identified on the basis of their normalized confinement energy. The size dependence of the first excitonic transition was best modeled by a four-band envelope approach which considers the anisotropy of the band edges (Andreev, A. D.; Lipovskii, A. A. Phys. Rev. B: Condens. Matter Mater. Phys. 1999, 59, 15402-15404). The extinction coefficients were calculated using concentrations obtained from inductively coupled plasma atomic emission spectrometry (ICP-AES), and their size dependence was found to follow a power law with exponent equal to approximately 2.5. In contrast with what was expected from the effective mass approximation, the per particle absorption cross section of the lowest transition was found to be strongly dependent on the particle size.

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Cademartiri L. et al. Size-Dependent Extinction Coefficients of PbS Quantum Dots // Journal of the American Chemical Society. 2006. Vol. 128. No. 31. pp. 10337-10346.
GOST all authors (up to 50) Copy
Cademartiri L., Montanari E., Calestani G., Migliori A., Guagliardi A., Ozin G. A. Size-Dependent Extinction Coefficients of PbS Quantum Dots // Journal of the American Chemical Society. 2006. Vol. 128. No. 31. pp. 10337-10346.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/ja063166u
UR - https://doi.org/10.1021/ja063166u
TI - Size-Dependent Extinction Coefficients of PbS Quantum Dots
T2 - Journal of the American Chemical Society
AU - Montanari, Erica
AU - Guagliardi, Antonietta
AU - Cademartiri, Ludovico
AU - Calestani, G.
AU - Migliori, Andrea
AU - Ozin, G A.
PY - 2006
DA - 2006/07/18 00:00:00
PB - American Chemical Society (ACS)
SP - 10337-10346
IS - 31
VL - 128
SN - 0002-7863
SN - 1520-5126
ER -
BibTex |
Cite this
BibTex Copy
@article{2006_Cademartiri,
author = {Erica Montanari and Antonietta Guagliardi and Ludovico Cademartiri and G. Calestani and Andrea Migliori and G A. Ozin},
title = {Size-Dependent Extinction Coefficients of PbS Quantum Dots},
journal = {Journal of the American Chemical Society},
year = {2006},
volume = {128},
publisher = {American Chemical Society (ACS)},
month = {jul},
url = {https://doi.org/10.1021/ja063166u},
number = {31},
pages = {10337--10346},
doi = {10.1021/ja063166u}
}
MLA
Cite this
MLA Copy
Cademartiri, Ludovico, et al. “Size-Dependent Extinction Coefficients of PbS Quantum Dots.” Journal of the American Chemical Society, vol. 128, no. 31, Jul. 2006, pp. 10337-10346. https://doi.org/10.1021/ja063166u.
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