Size-dependent reactivity in hydrosilylation of silicon nanocrystals

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Journal titleJournal of the American Chemical Society
Pages95649571; # of pages: 8
SubjectFTIR; Near-IR; Partial separation; Photochemical hydrosilylation; Quantum size effects; Silicon nanocrystals; Size-dependent reactivity; Small angle X-ray scattering; Visible and near infrared; Visible spectral regions; Hydrosilylation; X ray scattering; nanocrystal; chemical reaction; hydrosilylation; infrared spectroscopy; photochemistry; photoluminescence; ultraviolet radiation; X ray crystallography
AbstractWe present an investigation into the influence of nanocrystal size on the reactivity of silicon nanocrystals (Si-NCs) in near-UV photochemical hydrosilylation. The size-dependent reactivity of Si-NCs with photoluminescence (PL) in the visible and near-infrared regions was evaluated using PL and Fourier-transform infrared (FTIR) spectroscopy, and small-angle X-ray scattering (SAXS). Under near-UV excitation, Si-NCs with PL in the visible spectral region react faster than Si-NCs with near-IR PL, allowing partial separation of a mixture of Si-NC sizes through hydrosilylation. This is attributed to quantum size effects in the exciton-mediated mechanisms proposed for this reaction. © 2011 American Chemical Society.
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AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology
Peer reviewedYes
NPARC number21272028
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Record identifier822f70ed-d191-40a2-b574-2a5de334cbe8
Record created2014-05-21
Record modified2016-05-09
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