Functionalization of Silicon Nanoparticles via Silanization: Alkyl, Halide and Ester |
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| Authors: | Jing Zou Susan M Kauzlarich |
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| Institution: | (1) Department of Chemistry, University of California, Davis, One Shields Ave, Davis, CA 95616, USA;(2) Present address: Applied Materials Inc., 974 E Arques Ave, Sunnyvale, CA 94086, USA |
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| Abstract: | The feasibility of using silanization as a general tool to functionalize the surface of silicon nanoparticles (NPs) has been
investigated in detail. Silicon NPs were prepared from reduction of silicon tetrachloride with sodium naphthalide. The terminal
chloride on the surface of as-synthesized particles was substituted by methanol and water, in sequence. The particles were
then silanized by octyltrichlorosilane, 11-bromoundecyltrichlorosilane, or 2-(carbomethoxy)ethyltrichlorosilane. These treatments
yielded alkyl-, bromo-, or ester-termini on NP surfaces, respectively. The NPs were characterized by TEM, NMR, FTIR, UV–Vis,
and PL spectroscopy. Changes of termination groups brought various functionalities to the NPs, without loss of the photophysics
of the original NPs. |
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| Keywords: | Silicon nanoparticles Si quantum dots Si QD Silanization Photoluminescence Semiconductor quantum dot |
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