title: Assembling photoluminescent silicon nanocrystals into periodic mesoporous organosilica.
abstract: A contemporary question in the intensely active field of periodic mesoporous organosilica (PMO) materials is how large a silsesquioxane precursor can be self-assembled under template direction into the pore walls of an ordered mesostructure. An answer to this question is beginning to emerge with the ability to synthesize dendrimer, buckyball, and polyhedral oligomeric silsesquioxane PMOs. In this paper, we further expand the library of large-scale silsesquioxane precursors by demonstrating that photoluminescent nanocrystalline silicon that has been surface-capped with oligo(triethoxysilylethylene), denoted as ncSi:(CH(2)CH(2)Si(OEt)(3))(n)H, can be self-assembled into a photoluminescent nanocrystalline silicon periodic mesoporous organosilica (ncSi-PMO). A comprehensive multianalytical characterization of the structural and optical properties of ncSi-PMO demonstrates that the material gainfully combines the photoluminescent properties of nanocrystalline silicon with the porous structure of the PMO. This integration of two functional components makes ncSi-PMO a promising multifunctional material for optoelectronic and biomedical applications.
authors.affiliation: Department of Chemistry, Lanzhou University, China.
authors.forename: Min
authors.initials: M
authors.lastname: Guan
authors.forename: Wendong
authors.initials: W
authors.lastname: Wang
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Henderson
authors.forename: Omer
authors.initials: O
authors.lastname: Dag
authors.forename: Christian
authors.initials: C
authors.lastname: Kübel
authors.forename: Venkata Sai Kiran
authors.initials: VS
authors.lastname: Chakravadhanula
authors.forename: Julia
authors.initials: J
authors.lastname: Rinck
authors.forename: Igor L
authors.initials: IL
authors.lastname: Moudrakovski
authors.forename: Jordan
authors.initials: J
authors.lastname: Thomson
authors.forename: Jeffrey
authors.initials: J
authors.lastname: McDowell
authors.forename: Annie K
authors.initials: AK
authors.lastname: Powell
authors.forename: Haixia
authors.initials: H
authors.lastname: Zhang
authors.forename: Geoffrey A
authors.initials: GA
authors.lastname: Ozin