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Raman Spectroscopy Analysis of Surfaces
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Raman Spectroscopy Analysis of Surfaces

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Analytical Chemistry".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 2574

Special Issue Editor

Dr. Andrzej Kudelski

E-Mail Website
Guest Editor
Faculty of Chemistry, University of Warsaw, 1 Pasteur St., 02-093 Warsaw, Poland
Interests: synthesis of new nanomaterials for Raman spectroscopy analysis of surfaces; photochemical synthesis and reconstruction of silver nanostructures including their so-called plasmon-driven transformation; application of surface enhanced Raman spectroscopy for DNA detection
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

For many decades, Raman spectroscopy has not been considered a useful analytical tool because of the very low efficiency of “normal” Raman scattering. The typical total Raman scattering cross-section is ca. 10−29 cm2 per molecule, whereas typical cross-sections for absorption in ultraviolet and infrared regions are ca. 10−18 and 10−21 cm2 per molecule, respectively. Therefore, to record conventional Raman spectra, analytical concentrations greater than 0.01M are usually required. However, by utilizing special nano-resonators constructed from plasmonic metals, Raman scattering cross-sections (in an effect called surface-enhanced Raman spectroscopy—SERS) can be significantly increased, e.g., to 10−14 cm2 per molecule, making possible observations of Raman spectra even of a single molecule. This Special Issue of Molecules will attempt to cover the recent advances in SERS analysis of surfaces, including the characterization of various interfaces and selected analytical applications of SERS spectroscopy. 

Dr. Andrzej Kudelski
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Raman spectroscopy
  • characterization of various interfaces
  • SERS spectroscopy
  • applications

Published Papers (2 papers)

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Research

12 pages, 3702 KiB  
Article
Fabrication and Application of Ag@SiO2/Au Core–Shell SERS Composite in Detecting Cu2+ in Water Environment
by Meizhen Zhang, Lin Meng, Kelgenbaev Kalyinur, Siyuan Dong, Xinyi Chang, Qian Yu, Rui Wang, Bo Pang and Xianming Kong
Molecules 2024, 29(7), 1503; https://doi.org/10.3390/molecules29071503 - 27 Mar 2024
Viewed by 482
Abstract
A sensitive and simple method for detecting Cu2+ in the water source was proposed by using surface-enhanced Raman scattering spectroscopy (SERS) based on the Ag@SiO2/Au core–shell composite. The Ag@SiO2 SERS tag was synthesized by a simple approach, in which [...] Read more.
A sensitive and simple method for detecting Cu2+ in the water source was proposed by using surface-enhanced Raman scattering spectroscopy (SERS) based on the Ag@SiO2/Au core–shell composite. The Ag@SiO2 SERS tag was synthesized by a simple approach, in which Ag nanoparticles were first embedded with Raman reporter PATP and next coated with a SiO2 shell. The Ag@SiO2 nanoparticles had strong stability even in a high-concentration salty solution, and there were no changes to their properties and appearance within one month. The Ag@SiO2/Au composite was fabricated through a controllable self-assemble process. L-cysteine was decorated on the surface of a functionalized Ag@SiO2/Au composite, as the amino and carboxyl groups of it can form coordinate covalent bond with Cu2+, which shows that the Ag@SiO2/Au composite labelled with L-cysteine has excellent performance for the detection of Cu2+ in aqueous media. In this study, the SERS detection of Cu2+ was carried out using Ag@SiO2 nanoparticles, and the limit of detection (LOD) as low as 0.1 mg/L was achieved. Full article
(This article belongs to the Special Issue Raman Spectroscopy Analysis of Surfaces)
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16 pages, 3200 KiB  
Article
Electrochemical Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy of Imidazole Ring Functionalized Monolayer on Smooth Gold Electrode
by Agnė Zdaniauskienė, Martynas Talaikis, Tatjana Charkova, Rita Sadzevičienė, Linas Labanauskas and Gediminas Niaura
Molecules 2022, 27(19), 6531; https://doi.org/10.3390/molecules27196531 - 03 Oct 2022
Cited by 2 | Viewed by 1663
Abstract
The imidazole ring (Im) of histidine side chains plays a unique role in the function of proteins through covalent bonding with metal ions and hydrogen bonding interactions with adjusted biomolecules and water. At biological interfaces, these interactions are modified because of the presence [...] Read more.
The imidazole ring (Im) of histidine side chains plays a unique role in the function of proteins through covalent bonding with metal ions and hydrogen bonding interactions with adjusted biomolecules and water. At biological interfaces, these interactions are modified because of the presence of an electric field. Self-assembled monolayers (SAMs) with the functional Im group mimic the histidine side chain at electrified interfaces. In this study, we applied in-situ shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) to probe the structure and hydrogen bonding of Im-functionalized SAM on smooth Au at the electrochemical interface. The self-assembly of molecules on the Au induced the proton shift from N1 atom (Tautomer-I), which is the dominant form of Im in the bulk sample, to N3 atom (Tautomer-II). The impact of electrode potential on the hydrogen bonding interaction strength of the Im ring was identified by SHINERS. Temperature-Raman measurements and density functional theory (DFT) analysis revealed the spectral marker for Im ring packing (mode near 1496–1480 cm−1) that allowed us to associate the confined and strongly hydrogen bonded interfacial Im groups with electrode polarization at −0.8 V. Reflection adsorption IR (RAIR) spectra of SAMs with and without Im revealed that the bulky ring prevented the formation of a strongly hydrogen bonded amide group network. Full article
(This article belongs to the Special Issue Raman Spectroscopy Analysis of Surfaces)
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