Silver colloids impregnating or coating bacteria

S. Efrima, B. V. Bronk

Research output: Contribution to journalArticlepeer-review

167 Scopus citations


We produce silver nanocolloids selectively within and on Escherichia coli bacteria. Silver preferentially concentrates in the bacteria, distributes uniformly within them, or, alternatively, forms a rough coating over them. Oscillations in polarized light scattering vs scattering angle are more pronounced and shift to larger angles, compared to a control that has no silver. Very intense surface-enhanced Raman signals are observed for E. coli with a "wall colloid". The main bands can be associated with peptides and polysaccharides in the cell wall and its membrane. This work was extended to Gram-positive Bacillus megaterium.

Original languageEnglish
Pages (from-to)5947-5950
Number of pages4
JournalJournal of Physical Chemistry B
Issue number31
StatePublished - 30 Jul 1998

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


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