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Encapsulation of nanoclusters in dried gel materials via an inverse micelle/sol gel synthesis

United States Patent

*** EXPIRED ***
September 29, 1998
View the Complete Patent at the US Patent & Trademark Office
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A dried gel material sterically entrapping nanoclusters of a catalytically active material and a process to make the material via an inverse micelle/sol-gel synthesis. A surfactant is mixed with an apolar solvent to form an inverse micelle solution. A salt of a catalytically active material, such as gold chloride, is added along with a silica gel precursor to the solution to form a mixture. To the mixture are then added a reducing agent for the purpose of reducing the gold in the gold chloride to atomic gold to form the nanoclusters and a condensing agent to form the gel which sterically entraps the nanoclusters. The nanoclusters are normally in the average size range of from 5-10 nm in diameter with a monodisperse size distribution.
Martino; Anthony (Albuquerque, NM), Yamanaka; Stacey A. (Dallas, TX), Kawola; Jeffrey S. (Albuquerque, NM), Showalter; Steven K. (Albuquerque, NM), Loy; Douglas A. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
08/ 664,210
June 11, 1996
GOVERNMENT RIGHTS This invention was made with Government support under Contract DE-AC04-94AL85000 awarded by the U.S. Department of Energy. The Government has certain rights in this invention.