Ultradilute Ag-aquasols with extraordinary bactericidal properties: Role of the system Ag-O-H2O

R. Roy, M. R. Hoover, A. S. Bhalla, T. Slawecki, Sandwip Dey, W. Cao, Jian Li, S. Bhaskar

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


The laboratory data showing the minimum inhibitory concentrations (MIC) for a range of bacteria and a comparison of Ag-O-H2O metallic silver aquasols with the antibodies is presented. Aquasols are permanent dispersions of a solid phase in pure water and the dispersed phase are found to contain 15-30 nm particles of metallic Ag. One cryo-TEM image of the aquasol is found to show a cluster of three metallic silver particles which are separated by nanometer thick layers of different phase. The solid phase in silver aquasols consists of largely metallic silver particles of 5-6 nm size, counted by a layer of oxide materials and clustered as a dispersed phase of sol. Bending mode region Raman spectra of aquasols distinguishes among various commercial products and show differences on the same samples as a function of time. UV-VIS spectroscopy separates sols with different concentrations of Ag.

Original languageEnglish (US)
Pages (from-to)3-4
Number of pages2
JournalMaterials Research Innovations
Issue number1
StatePublished - Mar 1 2007


  • FTIR
  • Raman spectroscopy
  • Silver
  • Silver aquasols
  • Solid particle size and composition
  • Structure of liquid phase
  • UV-VIS

ASJC Scopus subject areas

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


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