A Library of Selenourea Precursors to PbSe Nanocrystals with Size Distributions near the Homogeneous Limit [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy - Physical Description:
- pages 2,296-2,305 : digital, PDF file
- Additional Creators:
- Brookhaven National Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- Here, we report a tunable library of N,N,N'-trisubstituted selenourea precursors and their reaction with lead oleate at 60–150 °C to form carboxylate-terminated PbSe nanocrystals in quantitative yields. Single exponential conversion kinetics can be tailored over 4 orders of magnitude by adjusting the selenourea structure. The wide range of conversion reactivity allows the extent of nucleation ([nanocrystal] = 4.6–56.7 μM) and the size following complete precursor conversion (d = 1.7–6.6 nm) to be controlled. Narrow size distributions (σ = 0.5–2%) are obtained whose spectral line widths are dominated (73–83%) by the intrinsic single particle spectral broadening, as observed using spectral hole burning measurements. Here, the intrinsic broadening decreases with increasing size (fwhm = 320–65 meV, d = 1.6–4.4 nm) that derives from exciton fine structure and exciton–phonon coupling rather than broadening caused by the size distribution.
- Report Numbers:
- E 1.99:bnl--204649-2018-jaam
bnl--204649-2018-jaam - Subject(s):
- Note:
- Published through SciTech Connect.
01/19/2017.
"bnl--204649-2018-jaam"
Journal of the American Chemical Society 139 6 ISSN 0002-7863 AM
Michael P. Campos; Mark P. Hendricks; Alexander N. Beecher; Willem Walravens; Robert A. Swain; Gregory T. Cleveland; Zeger Hens; Matthew Y. Sfeir; Jonathan S. Owen. - Funding Information:
- SC0012704
View MARC record | catkey: 24055244