Abstract

Surface-enhanced Raman scattering (SERS) spectra were measured for monolayers of various amino acids: L-methionine (Met), L-cysteine (Cys), L-glycine (Gly), L-leucine (Leu), L-phenylalanine (Phe), and L-proline (Pro) and their homodipeptides (Met-Met, Cys-Cys, Gly-Gly, Leu-Leu, Phe-Phe, and Pro-Pro) deposited onto a colloidal gold surface. Orientation of amino acids and their homodipeptides, as well as specific-competitive interactions of their functional groups with the gold surface, were predicted by detailed spectral analysis of the obtained SERS spectra. The analysis performed allowed us to propose a particular surface geometry for each amino acid and homodipeptide on the gold surface. In addition, we compared the structures of these molecules adsorbed on colloidal gold and silver surfaces.

Waveguide-based surface-enhanced Raman spectroscopy detection of protease activity using non-natural aromatic amino acids

Nina Turk, Ali Raza, Pieter Wuytens, Hans Demol, Michiel Van Daele, Christophe Detavernier, Andre Skirtach, Kris Gevaert, and Roel Baets
Biomed. Opt. Express 11(8) 4800-4816 (2020)

Facile synthesis of metal-phenolic-coated gold nanocuboids for surface-enhanced Raman scattering

Mengfei Zhou, Chunxue Zhao, Yang Li, Yanxian Guo, Hao Liu, Yanling Zhang, and Zhiming Liu
Appl. Opt. 59(20) 6124-6130 (2020)

Local plasmon sensor with gold colloid monolayers deposited upon glass substrates

Takayuki Okamoto, Ichirou Yamaguchi, and Tetsushi Kobayashi
Opt. Lett. 25(6) 372-374 (2000)

Method of optical manipulation of gold nanoparticles for surface-enhanced Raman scattering in a microcavity

Kun Xin, Xiaofeng Shi, Yi Liu, Zimeng Zhang, Wenjie Jia, and Jun Ma
Opt. Express 28(6) 8734-8743 (2020)

Compact dual-fiber surface-enhanced Raman scattering sensor with monolayer gold nanoparticles self-assembled on optical fiber

Hongwen Zhou, Jiansheng Liu, Haitao Liu, and Zheng Zheng
Appl. Opt. 57(27) 7931-7937 (2018)