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Open AccessArticle

Surface-Enhanced IR-Absorption Microscopy of Staphylococcus aureus Bacteria on Bactericidal Nanostructured Si Surfaces

1
Lebedev Physical Institute, 119991 Moscow, Russia
2
ITMO University, 197101 St. Petersburg, Russia
3
N.F. Gamaleya Federal Research Centre of Epidemiology and Microbiology, 123098 Moscow, Russia
4
FSBI TISNCM, 108840 Moscow, Russia
5
B.I. Stepanov Institute of Physics NAS Belarus, 220072 Minsk, Belarus
6
Laboratoire Hubert Curien, UMR CNRS 5516/UJM/Univ. Lyon, 42000 Saint-Etienne, France
*
Author to whom correspondence should be addressed.
Academic Editor: Ashok Kakkar
Molecules 2019, 24(24), 4488; https://doi.org/10.3390/molecules24244488
Received: 15 November 2019 / Revised: 1 December 2019 / Accepted: 5 December 2019 / Published: 7 December 2019
(This article belongs to the Special Issue Laser Synthesis)
Surface-enhanced IR absorption (SEIRA) microscopy was used to reveal main chemical and physical interactions between Staphylococcus aureus bacteria and different laser-nanostructured bactericidal Si surfaces via simultaneous chemical enhancement of the corresponding IR-absorption in the intact functional chemical groups. A cleaner, less passivated surface of Si nanoripples, laser-patterned in water, exhibits much stronger enhancement of SEIRA signals compared to the bare Si wafer, the surface coating of oxidized Si nanoparticles and oxidized/carbonized Si (nano) ripples, laser-patterned in air and water. Additional very strong bands emerge in the SEIRA spectra on the clean Si nanoripples, indicating the potential chemical modifications in the bacterial membrane and nucleic acids during the bactericidal effect. View Full-Text
Keywords: Si nanostructures; staphylococcus aureus bacterial biofilm; bactericidal effect; surface-enhanced IR microscopy; chemical enhancement Si nanostructures; staphylococcus aureus bacterial biofilm; bactericidal effect; surface-enhanced IR microscopy; chemical enhancement
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MDPI and ACS Style

Kudryashov, S.I.; Nastulyavichus, A.A.; Tolordava, E.R.; Kirichenko, A.N.; Saraeva, I.N.; Rudenko, A.A.; Romanova, Y.M.; Panarin, A.Y.; Ionin, A.A.; Itina, T.E. Surface-Enhanced IR-Absorption Microscopy of Staphylococcus aureus Bacteria on Bactericidal Nanostructured Si Surfaces. Molecules 2019, 24, 4488.

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