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Surface Chemistry of Colloidal PbSe Nanocrystals
Abstract
Solution nuclear magnetic resonance spectroscopy (NMR) is used to identify and quantify the organic capping of colloidal PbSe nanocrystals (Q-PbSe). We find that the capping consists primarily of tightly bound oleic acid ligands. Only a minor part of the ligand shell (0-5% with respect to the number of oleic acid ligands) is composed of tri- n-octylphosphine. As a result, tuning of the Q-PbSe size during synthesis is achieved by varying the oleic acid concentration. By combining the NMR results with inductively coupled plasma mass spectrometry, a complete Q-PbSe structural model of semiconductor core and organic ligands is constructed. The nanocrystals are nonstoichiometric, with a surface that is composed of lead atoms. The absence of surface selenium atoms is in accordance with an oleic acid ligand shell. NMR results on a Q-PbSe suspension, stored under ambient conditions, suggest that oxidation leads to the loss of oleic acid ligands and surface Pb atoms, forming dissolved lead oleate.
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Cites
Colloidal nanocrystal synthesis and the organic–inorganic interface
Yin, Y., & Alivisatos, A. P. (2005) · Nature · doi:10.1038/nature04165 · Cited by 3,273
Tunable Near-Infrared Optical Gain and Amplified Spontaneous Emission Using PbSe Nanocrystals
Schaller, R. D., Petruska, M. A., & Klimov, V. I. (2003) · The Journal of Physical Chemistry B · doi:10.1021/jp0311660 · Cited by 321
Cited by
Anderson, N. C., Hendricks, M. P., Choi, J. J., & Owen, J. S. (2013) · Journal of the American Chemical Society · doi:10.1021/ja4086758 · Cited by 874
CsPbBr3 QD/AlOx Inorganic Nanocomposites with Exceptional Stability in Water, Light, and Heat
Loiudice, A., Saris, S., Oveisi, E., Alexander, D. T. L., & Buonsanti, R. (2017) · Angewandte Chemie International Edition · doi:10.1002/anie.201703703 · Cited by 482
Tang, J., Brzozowski, L., Barkhouse, D. A. R., Wang, X., Debnath, R., Wolowiec, R., Palmiano, E., Levina, L., Pattantyus-Abraham, A. G., Jamakosmanovic, D., et al. (2010) · ACS Nano · doi:10.1021/nn901564q · Cited by 392
Metadata
- Authors
- Moreels, I., Fritzinger, B., Martins, J. C., & Hens, Z.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-10-17
- Volume
- 130
- Issue
- 45
- Pages
- 15081-15086
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2012352778
- Cited by
- 390
- References
- 2
- FWCI
- 9.77
- Type
- journal article
- Language
- en
- Open access
- closed
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