Deposition of CTAB-terminated nanorods on bacteria to form highly conducting hybrid systems

Vikas Berry, Anand Gole, Subrata Kundu, Catherine J. Murphy, Ravi F Saraf

Research output: Contribution to journalArticle

143 Citations (Scopus)

Abstract

Gold nanorods and nanospheres capped with positively charged CTAB are deposited on the surface of gram-positive bacterium having negatively charged teichoic acid brushes. The deposition rate is more than an order of magnitude faster than that for peptide and nucleic acid capped nanoparticles. For the nanorods, never been reported before, the strong electrostatic attraction causes the rods to bend conformally over the curved bacterium surface in random orientations. This leads to formation of an efficient percolating cluster (i.e., low contact resistance and high radius of gyration) with 104-fold higher current at 3-fold lower coverage compared to a monolayer from nanospheres. The high monolayer conductivity at only ∼10% coverage for nanorods has potential for fabricating a novel class of bioelectronic devices by coupling electronic "nanocircuitry" at the surface to the biological function of microorganisms.

Original languageEnglish (US)
Pages (from-to)17600-17601
Number of pages2
JournalJournal of the American Chemical Society
Volume127
Issue number50
DOIs
StatePublished - Dec 21 2005

Fingerprint

Nanotubes
Hybrid systems
Nanorods
Nanospheres
Bacteria
Monolayers
Teichoic Acids
Peptide Nucleic Acids
Nucleic acids
Gram-Positive Bacteria
Brushes
Contact resistance
Deposition rates
Static Electricity
Gold
Microorganisms
Nanoparticles
Peptides
Electrostatics
Equipment and Supplies

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Deposition of CTAB-terminated nanorods on bacteria to form highly conducting hybrid systems. / Berry, Vikas; Gole, Anand; Kundu, Subrata; Murphy, Catherine J.; Saraf, Ravi F.

In: Journal of the American Chemical Society, Vol. 127, No. 50, 21.12.2005, p. 17600-17601.

Research output: Contribution to journalArticle

Berry, Vikas ; Gole, Anand ; Kundu, Subrata ; Murphy, Catherine J. ; Saraf, Ravi F. / Deposition of CTAB-terminated nanorods on bacteria to form highly conducting hybrid systems. In: Journal of the American Chemical Society. 2005 ; Vol. 127, No. 50. pp. 17600-17601.
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