Nanomaterial-Based SERS Sensing and Detection Technology

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: closed (20 December 2024) | Viewed by 1946

Special Issue Editor


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Guest Editor
Department of Chemistry and CSGI, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
Interests: multifunctional nanomaterials: synthesis and characterisation; nanosensors; biomimetic nanosytems; SERS; biosensor
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Special Issue Information

Dear Colleagues,

Surface-enhanced Raman scattering was discovered in the 1970s. After decades of research and exploration, the advantages of SERS in detection, sensing and analysis have been gradually developed and widely used in materials science, biological science and other fields.

Substrate material was an important factor affecting SERS. In the past few years, nanomaterial based SERS sensing has become a emerged field, and the synthesis, structure and function of nanomaterials as SERS substrates have become the focus. Therefore, through theoretical discussion and experimental exploration, further exploring the relevant properties of these nanomaterials, optimizing their performance in SERS technology, and seeking innovative application fields of nanomaterial-based SERS sensing technology are important work for the further development of SERS technology.

As motivated by these, the Research Topic welcomes articles on, but not limited to, the following list of subjects, calling for either experimental and / or modelling results:

  1. Synthesis and characterization of nanomaterials in SERS technology.
  2. Design and structural characterization of nanoscale SERS substrate.
  3. Machine learning tools in nanomaterial-based SERS technology.
  4. Review of advances in nanomaterial-based SERS sensing technology.

Prof. Dr. Gabriella Caminati
Guest Editor

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Keywords

  • surface-enhanced Raman scattering
  • SERS substrates
  • SERS sensing
  • nanomaterials-based SERS
  • nanomaterial-based sensing
  • machine learning in SERS sensing

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Published Papers (2 papers)

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Research

11 pages, 2121 KiB  
Article
A Tuneable and Easy-to-Prepare SERS Substrate Based on Ag Nanorods: A Versatile Tool for Solution and Dry-State Analyses
by Margherita Longoni, Sofia Zucca and Silvia Bruni
Nanomaterials 2024, 14(22), 1808; https://doi.org/10.3390/nano14221808 - 11 Nov 2024
Viewed by 815
Abstract
Surface-enhanced Raman spectroscopy is a powerful technique for the ultra-sensitive detection of organic analytes. In this paper, the preparation of SERS substrates based on silver nanorods (AgNRs) is proposed, exploiting a simple protocol which does not require complex procedures and/or sophisticated and expensive [...] Read more.
Surface-enhanced Raman spectroscopy is a powerful technique for the ultra-sensitive detection of organic analytes. In this paper, the preparation of SERS substrates based on silver nanorods (AgNRs) is proposed, exploiting a simple protocol which does not require complex procedures and/or sophisticated and expensive instrumentation. For this purpose, various syntheses of AgNRs were tested, and the best one for preparing the SERS active substrate proved to be the one which does not involve surfactants as nanoparticle stabilizers. The plasmonic properties of the selected substrate can be modified based on the concentration of the deposited nanoparticles, allowing for the experimentation of different excitation wavelengths. Positive results were obtained on reference solutions of three natural dyes of historical interest using both green exciting radiation (532 nm) and two near-infrared ones (785 and 850 nm; the latter is combined with the SSE™ technology for further fluorescence quenching). Furthermore, the substrates of AgNRs were found to be suitable for SERS measurements even in dry-state conditions, i.e., only exploiting the electromagnetic interaction between the nanostructured substrate and the dye molecules absorbed onto a wool fibre. Full article
(This article belongs to the Special Issue Nanomaterial-Based SERS Sensing and Detection Technology)
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12 pages, 4178 KiB  
Article
Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive Detection
by Chia-Ling Sung, Tzung-Ta Kao and Yu-Cheng Lin
Nanomaterials 2024, 14(19), 1562; https://doi.org/10.3390/nano14191562 - 27 Sep 2024
Viewed by 831
Abstract
This paper discusses the fabrication of three-dimensional dendritic Ag nanostructures, showcasing pronounced Localized Surface Plasmon Resonance (LSPR) effects. These nanostructures, employed in surface-enhanced Raman scattering (SERS), function as sensors for lactic acid in artificial sweat. The dendritic structures of the silver nanoparticles (AgNPs) [...] Read more.
This paper discusses the fabrication of three-dimensional dendritic Ag nanostructures, showcasing pronounced Localized Surface Plasmon Resonance (LSPR) effects. These nanostructures, employed in surface-enhanced Raman scattering (SERS), function as sensors for lactic acid in artificial sweat. The dendritic structures of the silver nanoparticles (AgNPs) create an effective SERS substrate, with additional hotspots at branch junctures enhancing LSPR. We achieve differential LSPR effects by varying the distribution and spacing of branches and the overall morphology. Adjustments to electrodeposition parameters, such as current and plating solution protective agents on an anodized aluminum oxide (AAO) base, allow for precise control over LSPR intensities. By pre-depositing AgNPs, the electron transmission paths during electrodeposition are modified, which leads to optimized dendritic morphology and enhanced LSPR effects. Parameter optimization produces elongated rods with main and secondary branches, covered with uniformly sized, densely packed, non-overlapping spherical AgNPs. This configuration enhances the LSPR effect by generating additional hotspots beyond the branch tips. Fine-tuning the electrodeposition parameters improved the AgNPs’ morphology, achieving uniform particle distribution and optimal spacing. Compared to non-SERS substrates, our structure amplified the Raman signal for lactic acid detection by five orders of magnitude. This method can effectively tailor SERS substrates for specific analytes and laser-based detection. Full article
(This article belongs to the Special Issue Nanomaterial-Based SERS Sensing and Detection Technology)
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