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      Assembling photoluminescent silicon nanocrystals into periodic mesoporous organosilica

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      Author(s)
      Guan, M.
      Wang W.
      Henderson, E. J.
      Dag, Ö.
      Kübel, C.
      Chakravadhanula, V. S. K.
      Rinck, J.
      Moudrakovski, I. L.
      Thomson, J.
      McDowell, J.
      Powell, A. K.
      Zhang, H.
      Ozin, G. A.
      Date
      2012
      Source Title
      Journal of the American Chemical Society
      Print ISSN
      0002-7863
      Electronic ISSN
      1520-5126
      Publisher
      American Chemical Society
      Volume
      134
      Issue
      20
      Pages
      8439 - 8446
      Language
      English
      Type
      Article
      Item Usage Stats
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      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:(CH2CH2Si(OEt)3)nH, 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.
      Permalink
      http://hdl.handle.net/11693/21468
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/ja209532e
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