Nanocomposites containing nanoclusters of metals or semiconductors

Kimberly J. Burnam*, Joseph P. Carpenter, Charles M. Lukehart, Stephen B. Milne, S. R. Stock, R. Glosser, Bobby D. Jones

*Corresponding author for this work

Research output: Contribution to journalConference article

4 Scopus citations

Abstract

Neutral, low-valent complexes of transition metals or an organometallic compound of Ge are prepared containing ancillary ligands which bear silicate ester or (alkoxy)silicon functional groups. Inclusion of these molecules as dopant species in a conventional sol-gel synthesis of silica xerogels affords silica xerogels in which dopant molecules have presumably been covalently incorporated into the xerogel matrix with uniform and high dispersion. Subsequent thermal treatment of these molecularly doped xerogels under reducing or oxidizing/reducing conditions gives nanocomposites containing nanoclusters of metals or semiconductor substances. By this procedure, nanocomposites containing nanoclusters of Ag, Cu, Pt, Os, CCo 3 , Fe 2 P, Ni 2 P, or Ge have been prepared. Preliminary evidence for the formation of a nanocomposite containing Pt-Sn nanoclusters derived from a bimetallic molecular precursor is also presented. Characterization data for the nanocomposite materials include TEM, electron diffraction, EDS, XRD, and selected use of micro-Raman spectroscopy. These results support the hypothesis that covalent incorporation of molecular precursors containing low-valent metals into a silica xerogel can afford nanocluster phases with high dispersion, relatively small particle size, and unusual elemental composition.

Original languageEnglish (US)
Pages (from-to)21-30
Number of pages10
JournalMaterials Research Society Symposium - Proceedings
Volume351
StatePublished - Dec 1 1994
EventProceedings of the 1994 MRS Symposium - San Francisco, CA, USA
Duration: Apr 4 1994Apr 8 1994

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Burnam, K. J., Carpenter, J. P., Lukehart, C. M., Milne, S. B., Stock, S. R., Glosser, R., & Jones, B. D. (1994). Nanocomposites containing nanoclusters of metals or semiconductors. Materials Research Society Symposium - Proceedings, 351, 21-30.