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SERS Sensing
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SERS Sensing

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (31 August 2019) | Viewed by 14869

Special Issue Editor

Prof. Agnieszka Kamińska

E-Mail Website
Guest Editor
Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
Interests: Raman and SERS, spectroscopy, nanoplasmonic structures, biosensors, SERS-based detection of biological systems, fabrication of SERS substrates

Special Issue Information

Dear Colleagues,

Surface-enhanced Raman spectroscopy (SERS) is currently a dynamically developing method more widely applied in biomedical and analytical studies. SERS phenomenon was observed in 1974 by Fleischman, and it relies on the enhancement of an inelastic scattered light by molecules adsorbed on a roughened metallic surface of gold, silver, or copper or their nanoparticles (although the list of metals for which such enhancing of Raman scattering was observed is much longer). As a result of the complex mechanisms involved in the SERS phenomenon, the Raman signal is enhanced 103–1014, which provides the opportunity to observe single molecules. Such a high detection sensitivity coupled with a high selectivity opens up a wide range of applications to SERS spectroscopy. The SERS technique is used, e.g., in studies on polymers; in studies on corrosion; for detection and characterization of pigments in archaeological objects and works of art; in trace analysis, e.g., to determine water pollution; in forensics; in medicine; or in the detection of terrorist threats. Increasingly, its potential is used in medical and analytical studies, and it seems that now it is one of the leading applications of the SERS technique.

This Special Issue on SERS Sensors is dedicated to the discussion of the latest research in the application of the SERS technique, especially for biomedical and analytical studies. Special attention will be given to the latest developments in the fabrication of the SERS-active substrate for the detection of bacteria, viruses, cancer cells, neurotransmitters, and immunemarkers in body fluids (urine, blood, and cerebrospinal fluid); the detection of pathogens in food; and the identification of explosives and pollutants important in military protection.

Prof. Agnieszka Kamińska
Guest Editor

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. Sensors 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

  • SERS substrates
  • SERS-based immunoassay
  • SERS and microfluidic
  • cancer diagnosis
  • detection of bacteria
  • spectro

Published Papers (3 papers)

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Research

10 pages, 2161 KiB  
Article
SERS, XPS and DFT Study of Xanthine Adsorbed on Citrate-Stabilized Gold Nanoparticles
by Stefano Caporali, Francesco Muniz-Miranda, Alfonso Pedone and Maurizio Muniz-Miranda
Sensors 2019, 19(12), 2700; https://doi.org/10.3390/s19122700 - 15 Jun 2019
Cited by 33 | Viewed by 5172
Abstract
We have studied the adsorption of xanthine, a nucleobase present in human tissue and fluids that is involved in important metabolic processes, on citrate-reduced gold colloidal nanoparticles by means of surface-enhanced Raman scattering (SERS), absorption, and X-ray photoelectron spectroscopy (XPS) measurements, along with [...] Read more.
We have studied the adsorption of xanthine, a nucleobase present in human tissue and fluids that is involved in important metabolic processes, on citrate-reduced gold colloidal nanoparticles by means of surface-enhanced Raman scattering (SERS), absorption, and X-ray photoelectron spectroscopy (XPS) measurements, along with density functional theory (DFT) calculations. The citrate anions stabilize the colloidal suspensions by strongly binding the gold nanoparticles. However, these anions do not impair the adsorption of xanthine on positively-charged active sites present on the metal surface. We have obtained the Fourier transform (FT)-SERS spectra of adsorbed xanthine by laser excitation in the near infrared spectral region, where interference due to fluorescence emission does not usually occur. In fact, the addition of chloride ions to the Au/xanthine colloid induces the aggregation of the gold nanoparticles, whose plasmonic band is shifted to the near infrared region where there is the exciting laser line of the FT–Raman instrument. Hence, this analytical approach is potentially suitable for spectroscopic determination of xanthine directly in body fluids, avoiding fluorescence phenomena induced by visible laser irradiation. Full article
(This article belongs to the Special Issue SERS Sensing)
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9 pages, 5842 KiB  
Article
Surface Enhanced Raman Spectroscopy Detection of Sodium Thiocyanate in Milk Based on the Aggregation of Ag Nanoparticles
by Yanting Feng, Rijian Mo, Ling Wang, Chunxia Zhou, Pengzhi Hong and Chengyong Li
Sensors 2019, 19(6), 1363; https://doi.org/10.3390/s19061363 - 19 Mar 2019
Cited by 22 | Viewed by 5125
Abstract
A method is developed for detecting the concentration of sodium thiocyanate (NaSCN) in milk based on surface-enhanced Raman scattering (SERS) technology. A trichloroacetic acid solution can be used to enhance the SERS signal because of its function in promoting the aggregation of Ag [...] Read more.
A method is developed for detecting the concentration of sodium thiocyanate (NaSCN) in milk based on surface-enhanced Raman scattering (SERS) technology. A trichloroacetic acid solution can be used to enhance the SERS signal because of its function in promoting the aggregation of Ag nanoparticles (Ag NPs). Meanwhile, the protein in milk would be precipitated as trichloroacetic acid added and the interference from protein could be reduced during the detection. In this work, the enhancement factor (EF) is 7. 56 × 105 for sodium thiocyanate in water and the limit of detection (LOD) is 0.002 mg/L. Meanwhile, this method can be used to detect the concentration of sodium thiocyanate in milk. Results show that SERS intensity increased as the concentration of sodium thiocyanate increase from 10 to 100 mg/L. The linear correlation coefficient is R2 = 0.998 and the detection limit is 0.04 mg/L. It is observed that the concentration of sodium thiocyanate does not exceed the standard in the three kinds of milk. The confirmed credibility of SERS detection is compared with conventional methods. Full article
(This article belongs to the Special Issue SERS Sensing)
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9 pages, 4172 KiB  
Article
Formation of Interstitial Hot-Spots Using the Reduced Gap-Size between Plasmonic Microbeads Pattern for Surface-Enhanced Raman Scattering Analysis
by Taeksu Lee, Sanghee Jung, Soongeun Kwon, Woochang Kim, Jinsung Park, Hyungjun Lim and JaeJong Lee
Sensors 2019, 19(5), 1046; https://doi.org/10.3390/s19051046 - 1 Mar 2019
Cited by 16 | Viewed by 3161
Abstract
To achieve an effective surface-enhanced Raman scattering (SERS) sensor with periodically distributed “hot spots” on wafer-scale substrates, we propose a hybrid approach combining physical nano-imprint lithography and a chemical deposition method to form a silver microbead array. Nano-imprint lithography (NIL) can lead to [...] Read more.
To achieve an effective surface-enhanced Raman scattering (SERS) sensor with periodically distributed “hot spots” on wafer-scale substrates, we propose a hybrid approach combining physical nano-imprint lithography and a chemical deposition method to form a silver microbead array. Nano-imprint lithography (NIL) can lead to mass-production and high throughput, but is not appropriate for generating strong “hot-spots.” However, when we apply electrochemical deposition to an NIL substrate and the reaction time was increased to 45 s, periodical “hot-spots” between the microbeads were generated on the substrates. It contributed to increasing the enhancement factor (EF) and lowering the detection limit of the substrates to 4.40 × 106 and 1.0 × 10−11 M, respectively. In addition, this synthetic method exhibited good substrate-to-substrate reproducibility (RSD < 9.4%). Our research suggests a new opportunity for expanding the SERS application. Full article
(This article belongs to the Special Issue SERS Sensing)
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