Molecules, Vol. 24, Pages 4488: Surface-Enhanced IR-Absorption Microscopy of Staphylococcus aureus Bacteria on Bactericidal Nanostructured Si Surfaces

Molecules, Vol. 24, Pages 4488: Surface-Enhanced IR-Absorption Microscopy of Staphylococcus aureus Bacteria on Bactericidal Nanostructured Si Surfaces Molecules doi: 10.3390/molecules24244488 Authors: Sergey I. Kudryashov Alena A. Nastulyavichus Eteri R. Tolordava Alexey N. Kirichenko Irina N. Saraeva Andrey A. Rudenko Yulia M. Romanova Andrey Yu. Panarin Andrey A. Ionin Tatiana E. Itina 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.
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research