The Surface of Nanoparticle Silicon as Studied by Solid-State NMR.

ABSTRACT: The surface structure and adjacent interior of commercially available silicon nanopowder (np-Si) was studied using multinuclear, solid-state NMR spectroscopy. The results are consistent with an overall picture in which the bulk of the np-Si interior consists of highly ordered ("crystalline") silicon atoms, each bound tetrahedrally to four other silicon atoms. From a combination of ¹H, ²⁹Si and ²H magic-angle-spinning (MAS) NMR results and quantum mechanical ²⁹Si chemical shift calculations, silicon atoms on the surface of "as-received" np-Si were found to exist in a variety of chemical structures, with apparent populations in the order (a) (Si-O-)₃Si-H > (b) (Si-O-)₃SiOH > (c) (HO-)_nSi

SUBMITTER: Faulkner RA 

PROVIDER: S-EPMC5452113 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature