Abstract
A facile and efficient, one step method using high-energy ball milling (HEBM) to produce chloroalkyl-functionalized silicon nanoparticles is described. HEBM causes silicon wafers to fracture and exposes reactive silicon surfaces. Nanometer-sized, functionalized particles with alkyl-linked chloro groups are synthesized by milling the silicon precursor in presence of an ω-chloroalkyne in either hexene or hexyne. This process allows tuning of the concentration of the exposed, alkyl-linked chloro groups, simply by varying the relative amounts of the coreactants. The silicon nanoparticles formed serve as a starting point for a wide variety of chemical reactions, which may be used to alter the surface properties of the functionalized nanoparticles.
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Acknowledgments
This work is supported by the National Science Foundation (NSF Grant CMMI-0726943) and by the Tulane Institute for Macro-Molecular Engineering and Sciences (TIMES, NASA Grant NNX08AP04A).
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Hallmann, S., Fink, M.J. & Mitchell, B.S. Mechanochemical synthesis of functionalized silicon nanoparticles with terminal chlorine groups. Journal of Materials Research 26, 1052–1060 (2011). https://doi.org/10.1557/jmr.2011.31
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DOI: https://doi.org/10.1557/jmr.2011.31