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Size‐Dependent Oxidation of Monodisperse Silicon Nanocrystals with Allylphenylsulfide Surfaces
Author(s) -
Rinck Julia,
Schray Dirk,
Kübel Christian,
Powell Annie K.,
Ozin Geoffrey A.
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201401965
Subject(s) - dispersity , photoluminescence , hydrosilylation , materials science , nanocrystal , quantum yield , heteroatom , silicon , transmission electron microscopy , photochemistry , chemical engineering , characterization (materials science) , nanotechnology , organic chemistry , chemistry , polymer chemistry , optoelectronics , fluorescence , optics , catalysis , ring (chemistry) , physics , engineering
The synthesis and characterization of size‐separated silicon nanocrystals functionalized with a heteroatom‐substituted organic capping group, allylphenylsulfide, via photochemical hydrosilylation are described for the first time. These silicon nanocrystals form colloidally stable and highly photoluminescent dispersions in non‐polar organic solvents with an absolute quantum yield as high as 52% which is 20% above that of the allylbenzene analogue. Solutions of the size‐separated fractions are characterized over time to monitor the effect of aging in air by following the change of their photoluminescence and absolute quantum yields, supplemented by transmission electron microscopy.