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New Vibrational Spectroscopy Developments of Material Characterization
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New Vibrational Spectroscopy Developments of Material Characterization

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: closed (20 December 2023) | Viewed by 7360

Special Issue Editors

Dr. Gediminas Niaura

E-Mail Website
Guest Editor
Center for Physical Sciences and Technology, Sauletekio Ave 3, LT-10257 Vilnius, Lithuania
Interests: Raman spectroscopy; surface-enhanced Raman spectroscopy; sum-frequency generation; electrochemical interface; biospectroscopy; adsorption
Special Issues, Collections and Topics in MDPI journals
Dr. Martynas Talaikis

E-Mail Website
Guest Editor
Institute of Biochemistry, Life Sciences Center, Vilnius University, Saulėtekio Ave. 7, LT-10257 Vilnius, Lithuania
Interests: surface-enhanced vibrational spectroscopy; spectroelectrochemistry; plasmonic nanoparticles; self-assembled monolayers; tethered-bilayer lipid membranes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We live in times of rapid development of new and functional materials, which not only improve the wellbeing of people, but also contribute to the growth of national economies. Material science goes hand-in-hand with the advancement of novel experimental techniques that deepen our understanding of the relationships between material properties and their functionality. This Special Issue, “New Vibrational Spectroscopy Developments of Material Characterization”, aims to address technological advances and applications of emerging methods for material characterization in vibrational spectroscopy.

Vibrational spectroscopy provides rich molecular-level information on material structure, surface conformational changes, the secondary structure of biomolecules, and interfacial behavior in neutral and electrified media. This great deal of advantages led to the spurt in the developments of new Raman and infrared absorption techniques as well as nonlinear vibrational sum frequency generation spectroscopy in the past couple of decades. We invite to publish original experimental works on multi-wavelength Raman spectroscopy, surface-enhanced Raman spectroscopy (SERS), shell-isolated nanoparticle enhanced Raman spectroscopy (SHINERS), tip-enhanced Raman spectroscopy (TERS), graphene-enhanced Raman spectroscopy (GERS), surface-enhanced infrared absorption spectroscopy (SEIRAS), sum-frequency generation (SFG) spectroscopy or any modification of vibrational spectroscopies, and also new routes for generating plasmonic and magneto-plasmonic nanoparticles and surfaces.

Dr. Gediminas Niaura
Dr. Martynas Talaikis
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 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

  • surface-enhanced Raman spectroscopy
  • graphene-enhanced Raman spectroscopy
  • tip-enhanced Raman spectroscopy
  • SHINERS
  • surface-enhanced infrared absorption spectroscopy
  • sum frequency generation spectroscopy
  • magneto-plasmonic nanoparticles
  • nano-antennas
  • hybrid plasmonic nanoparticles

Published Papers (5 papers)

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Research

12 pages, 1341 KiB  
Article
Ultrasensitive Detection of Malachite Green Isothiocyanate Using Nanoporous Gold as SERS Substrate
by Deepti Raj, Noor Tayyaba, Ginevra De Vita, Federico Scaglione and Paola Rizzi
Materials 2023, 16(13), 4620; https://0-doi-org.brum.beds.ac.uk/10.3390/ma16134620 - 27 Jun 2023
Cited by 2 | Viewed by 1050
Abstract
In this article, a high-performance nanostructured substrate has been fabricated for the ultrasensitive detection of the organic pollutant, Malachite green isothiocyanate (MGITC), in aquatic systems via the Surface Enhanced Raman Spectroscopy (SERS) technique. The chemical dealloying approach has been used to synthesize a [...] Read more.
In this article, a high-performance nanostructured substrate has been fabricated for the ultrasensitive detection of the organic pollutant, Malachite green isothiocyanate (MGITC), in aquatic systems via the Surface Enhanced Raman Spectroscopy (SERS) technique. The chemical dealloying approach has been used to synthesize a three-dimensional nanoporous gold substrate (NPG) consisting of pores and multigrained ligament structures along thickness. The formation of the framework in NPG-5h has been confirmed by SEM with an average ligament size of 65 nm at the narrower neck. Remarkable SERS performance has been achieved by utilizing the NPG-5h substrate for the detection of MGITC, showing a signal enhancement of 7.9 × 109. The SERS substrate also demonstrated an impressively low-detection limit of 10−16 M. The presence of numerous active sites, as well as plasmonic hotspots on the nanoporous surface, can be accredited to the signal amplification via the Localized Surface Plasmon Resonance (LSPR) phenomenon. As a result, SERS detection technology with the fabricated-NPG substrate not only proves to be a simple and effective approach for detecting malachite green but also provides a basis for in situ detection approach of toxic chemicals in aquatic ecosystems. Full article
(This article belongs to the Special Issue New Vibrational Spectroscopy Developments of Material Characterization)
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10 pages, 3363 KiB  
Article
The Role of GaN in the Heterostructure WS2/GaN for SERS Applications
by Tsung-Shine Ko, En-Ting Lin, Yen-Teng Ho and Chen-An Deng
Materials 2023, 16(8), 3054; https://0-doi-org.brum.beds.ac.uk/10.3390/ma16083054 - 12 Apr 2023
Cited by 1 | Viewed by 1332
Abstract
In the application of WS2 as a surface–enhanced Raman scattering (SERS) substrate, enhancing the charge transfer (CT) opportunity between WS2 and analyte is an important issue for SERS efficiency. In this study, we deposited few-layer WS2 (2–3 layers) on GaN [...] Read more.
In the application of WS2 as a surface–enhanced Raman scattering (SERS) substrate, enhancing the charge transfer (CT) opportunity between WS2 and analyte is an important issue for SERS efficiency. In this study, we deposited few-layer WS2 (2–3 layers) on GaN and sapphire substrates with different bandgap characteristics to form heterojunctions using a chemical vapor deposition. Compared with sapphire, we found that using GaN as a substrate for WS2 can effectively enhance the SERS signal, with an enhancement factor of 6.45 × 104 and a limit of detection of 5 × 10−6 M for probe molecule Rhodamine 6G according to SERS measurement. Analysis of Raman, Raman mapping, atomic force microscopy, and SERS mechanism revealed that The SERS efficiency increased despite the lower quality of the WS2 films on GaN compared to those on sapphire, as a result of the increased number of transition pathways present in the interface between WS2 and GaN. These carrier transition pathways could increase the opportunity for CT, thus enhancing the SERS signal. The WS2/GaN heterostructure proposed in this study can serve as a reference for enhancing SERS efficiency. Full article
(This article belongs to the Special Issue New Vibrational Spectroscopy Developments of Material Characterization)
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15 pages, 3283 KiB  
Article
Electrochemical SEIRAS Analysis of Imidazole-Ring-Functionalized Self-Assembled Monolayers
by Vaidas Pudžaitis, Martynas Talaikis, Rita Sadzevičienė, Linas Labanauskas and Gediminas Niaura
Materials 2022, 15(20), 7221; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15207221 - 17 Oct 2022
Cited by 2 | Viewed by 1477
Abstract
An essential amino acid, histidine, has a vital role in the secondary structure and catalytic activity of proteins because of the diverse interactions its side chain imidazole (Im) ring can take part in. Among these interactions, hydrogen donating and accepting bonding are often [...] Read more.
An essential amino acid, histidine, has a vital role in the secondary structure and catalytic activity of proteins because of the diverse interactions its side chain imidazole (Im) ring can take part in. Among these interactions, hydrogen donating and accepting bonding are often found to operate at the charged interfaces. However, despite the great biological significance, hydrogen-bond interactions are difficult to investigate at electrochemical interfaces due to the lack of appropriate experimental methods. Here, we present a surface-enhanced infrared absorption spectroscopy (SEIRAS) and density functional theory (DFT) study addressing this issue. To probe the hydrogen-bond interactions of the Im at the electrified organic layer/water interface, we constructed Au-adsorbed self-assembled monolayers (SAMs) that are functionalized with the Im group. As the prerequisite for spectroelectrochemical investigations, we first analyzed the formation of the monolayer and the relationship between the chemical composition of SAM and its structure. Infrared absorption markers that are sensitive to hydrogen-bonding interactions were identified. We found that negative electrode polarization effectively reduced hydrogen-bonding strength at the Im ring at the organic layer–water interface. The possible mechanism governing such a decrease in hydrogen-bonding interaction strength is discussed. Full article
(This article belongs to the Special Issue New Vibrational Spectroscopy Developments of Material Characterization)
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14 pages, 2884 KiB  
Article
The Combined Effect of Ambient Conditions and Diluting Salt on the Degradation of Picric Acid: An In Situ DRIFT Study
by Roberto Sanchirico, Luciana Lisi and Valeria Di Sarli
Materials 2022, 15(17), 6029; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15176029 - 1 Sep 2022
Cited by 2 | Viewed by 1373
Abstract
An unexpected promoting effect of KBr, used as a diluting salt, on the degradation of picric acid (PA) was observed during in situ diffuse reflectance infrared Fourier-transform (DRIFT) spectroscopy experiments performed here under accelerated ageing conditions—at 80 °C and under an inert or [...] Read more.
An unexpected promoting effect of KBr, used as a diluting salt, on the degradation of picric acid (PA) was observed during in situ diffuse reflectance infrared Fourier-transform (DRIFT) spectroscopy experiments performed here under accelerated ageing conditions—at 80 °C and under an inert or oxidative atmosphere. While the formation of potassium picrate was excluded, this promoting effect—which is undesired as it masks the possible effects of test conditions on the ageing process of the material—was assumed to favor a first step of the decomposition mechanism of PA, which involves the inter- or intramolecular transfer of hydrogen to the nitro group, and possibly proceeds up to the formation of an amino group. An alternative diluting salt, ZnSe, which is much less commonly used in infrared spectroscopy than KBr, was then proposed in order to avoid misleading interpretation of the results. ZnSe was found to act as a truly inert diluting salt, preventing the promoting effect of KBr. The much more chemically inert nature (towards PA) of ZnSe compared to KBr was also confirmed, at much higher temperatures than DRIFT experiments, by dynamic differential scanning calorimetry (DSC) runs carried out on pure PA (i.e., PA without salt) and PA/salt (ZnSe or KBr) solid mixtures. Full article
(This article belongs to the Special Issue New Vibrational Spectroscopy Developments of Material Characterization)
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11 pages, 2961 KiB  
Article
Influence of the Co-Adsorbed Ions on the Surface-Enhanced Raman Scattering Spectra of Dopamine Adsorbed on Nanostructured Silver
by Aleksandra Michałowska, Kacper Jędrzejewski and Andrzej Kudelski
Materials 2022, 15(17), 5972; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15175972 - 29 Aug 2022
Cited by 2 | Viewed by 1666
Abstract
The abnormal metabolism or imbalance of dopamine may lead to some neurological disorders. Therefore, the facile and fast detection of this neurotransmitter is essential in the early diagnosis of some diseases. One of the methods that can be used for the detection and [...] Read more.
The abnormal metabolism or imbalance of dopamine may lead to some neurological disorders. Therefore, the facile and fast detection of this neurotransmitter is essential in the early diagnosis of some diseases. One of the methods that can be used for the detection and determination of dopamine is the surface-enhanced Raman scattering (SERS). In this contribution, we report a very strong influence of some salts (we used salts containing Na+ cations and the following anions: SO42−, F−, Cl−, Br−, and I−) on the spectral patterns and intensity of the SERS spectra of dopamine adsorbed on a nanostructured macroscopic silver substrate. The analysis of the recorded SERS spectra based on the assignments of Raman bands from the density-functional theory (DFT) calculations and based on the SERS surface selection rules reveals that when molecules of dopamine are adsorbed from an aqueous solution to which no electrolytes have been added, they adopt a flat orientation versus the silver surface; whereas, the molecules of dopamine co-adsorbed with various ions interact with the silver surface, mainly via phenolic groups, and they adopt a perpendicular orientation versus the metal surface. An addition of electrolytes also significantly influences the intensity of the recorded SERS spectrum; for example, an addition of Na2SO4 to a final concentration of 1 M induces an increase in the intensity of the measured SERS spectrum by a factor of ca. 40. This means that the addition of electrolytes to the analyzed solution can reduce the limit of detection of dopamine by SERS spectroscopy. The abovementioned findings may facilitate the construction of dopamine SERS sensors. Full article
(This article belongs to the Special Issue New Vibrational Spectroscopy Developments of Material Characterization)
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