Abstract
Hydride-terminated silicon (Si) nanocrystals were capped with dodecanethiol by a thermally promoted thiolation reaction. Under an inert atmosphere, the thiol-capped nanocrystals exhibit photoluminescence (PL) properties similar to those of alkene-capped Si nanocrystals, including size-tunable emission wavelength, relatively high quantum yields (>10%), and long radiative lifetimes (26-280 μs). X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy confirmed that the ligands attach to the nanocrystal surface via covalent Si-S bonds. The thiol-capping layer, however, readily undergoes hydrolysis and severe degradation in the presence of moisture. Dodecanethiol could be exchanged with dodecene by hydrosilylation for enhanced stability.
| Original language | English |
|---|---|
| Pages (from-to) | 6886-6893 |
| Number of pages | 8 |
| Journal | Langmuir |
| Volume | 31 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - Jun 23 2015 |
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ASJC Scopus subject areas
- Electrochemistry
- Condensed Matter Physics
- Surfaces and Interfaces
- Materials Science(all)
- Spectroscopy
Cite this
Synthesis and Ligand Exchange of Thiol-Capped Silicon Nanocrystals. / Yu, Yixuan; Rowland, Clare E.; Schaller, Richard D; Korgel, Brian A.
In: Langmuir, Vol. 31, No. 24, 23.06.2015, p. 6886-6893.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis and Ligand Exchange of Thiol-Capped Silicon Nanocrystals
AU - Yu, Yixuan
AU - Rowland, Clare E.
AU - Schaller, Richard D
AU - Korgel, Brian A.
PY - 2015/6/23
Y1 - 2015/6/23
N2 - Hydride-terminated silicon (Si) nanocrystals were capped with dodecanethiol by a thermally promoted thiolation reaction. Under an inert atmosphere, the thiol-capped nanocrystals exhibit photoluminescence (PL) properties similar to those of alkene-capped Si nanocrystals, including size-tunable emission wavelength, relatively high quantum yields (>10%), and long radiative lifetimes (26-280 μs). X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy confirmed that the ligands attach to the nanocrystal surface via covalent Si-S bonds. The thiol-capping layer, however, readily undergoes hydrolysis and severe degradation in the presence of moisture. Dodecanethiol could be exchanged with dodecene by hydrosilylation for enhanced stability.
AB - Hydride-terminated silicon (Si) nanocrystals were capped with dodecanethiol by a thermally promoted thiolation reaction. Under an inert atmosphere, the thiol-capped nanocrystals exhibit photoluminescence (PL) properties similar to those of alkene-capped Si nanocrystals, including size-tunable emission wavelength, relatively high quantum yields (>10%), and long radiative lifetimes (26-280 μs). X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy confirmed that the ligands attach to the nanocrystal surface via covalent Si-S bonds. The thiol-capping layer, however, readily undergoes hydrolysis and severe degradation in the presence of moisture. Dodecanethiol could be exchanged with dodecene by hydrosilylation for enhanced stability.
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U2 - 10.1021/acs.langmuir.5b01246
DO - 10.1021/acs.langmuir.5b01246
M3 - Article
VL - 31
SP - 6886
EP - 6893
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 24
ER -