Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Raman Scattering Study of Amino Acids Adsorbed on A Silver Nanoisland Film

Alexey Skvortsov
,
Ekaterina Babich
ORCID logo ,
Andrey Lipovskii
* ORCID logo ,
Alexey Redkov
,
Guang Yang
,
Valentina Zhurikhina
ORCID logo
Version 1 : Received: 25 June 2022 / Approved: 28 June 2022 / Online: 28 June 2022 (03:32:19 CEST)

A peer-reviewed article of this Preprint also exists.

Skvortsov, A.; Babich, E.; Lipovskii, A.; Redkov, A.; Yang, G.; Zhurikhina, V. Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film. Sensors 2022, 22, 5455. Skvortsov, A.; Babich, E.; Lipovskii, A.; Redkov, A.; Yang, G.; Zhurikhina, V. Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film. Sensors 2022, 22, 5455.

Abstract

We studied surface enhanced Raman spectra of amino acids D-alanine and DL-serine and their mixture on silver nanoisland films (SNF), immersed in phosphate buffer saline solution at millimolar amino acid concentrations. It is shown that the spectra from the amino acid solutions differ from the reference spectra for microcrystallites due to electrostatic orientation of amino acid zwitterions by the metal nanoisland film. Moreover, non-additive peaks are observed in the spectrum of the mixture of amino acids adsorbed on SNF, which means that intermolecular interactions between adsorbed amino acids are very significant. The results indicate the need for a thorough analysis of the Raman spectra from amino acid solutions in the presence of a nanostructured metal surface, and may also be of interest for studying molecular properties and intermolecular interactions.

Keywords

SERS; metal surfaces; amino acids

Subject

Physical Sciences, Optics and Photonics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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