Recent Advances in Optical Chemo- and Biosensors

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Optical Chemical Sensors".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 511

Special Issue Editors


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Guest Editor
School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK
Interests: optical sensors; microfluidics; smart hydrogels; sample preparation
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Process Instruments (UK) Ltd., Turf Street, Burnley BB11 3BP, Lancashire, UK
Interests: optical sensors; microfluidics; smart hydrogels; instrumentation

Special Issue Information

Dear Colleagues,

Optical sensors have many advantages over other types of sensors as they can exploit many different sensing modalities such as refractive index, absorption, scattering, interference, and luminescence. They can also be non-invasive and remotely interrogated. Since the commercialization of surface plasmon resonance sensors in 1990, the field of optical sensors has expanded significantly with new types of sensors, new materials, and new applications being developed at a rapid pace. Advances in optoelectronics have also resulted in a wide variety of light sources and detectors that can be applied to chemo- and biosensors. This Special Issue covers all types of optical sensors and their applications and is in collaboration with XVI EUROPT(R)ODE 2024, but any article by other scholars that fits the theme of this Special Issue will also be accepted.

Topics may include:

  • Molecular probes;
  • Wearable or implantable optical sensors;
  • Luminescent and FRET sensors;
  • Environmental and food analysis;
  • Biomedical applications;
  • Biophotonics;
  • Plasmonics;
  • Label-free optical sensors;
  • Instrumentation and 3D-printed devices;
  • Single-molecule sensing;
  • Optical sensors for disease surveillance.

Dr. Ruchi Gupta
Dr. Nicholas J. Goddard
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. Chemosensors is an international peer-reviewed open access monthly 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 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

  • optical sensors
  • optical biosensors
  • molecular probes
  • plasmonics
  • wearable sensors

Published Papers (1 paper)

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Research

13 pages, 3710 KiB  
Article
Synergistic Enhancement Effect of Ag/rGO as SERS Platform for Capture and Trace Detection of Fenvalerate Molecules
by Minghui Yu, Chongyang Qin, Zhi Yu, Biao Sun, Dejiang Ni, De Zhang and Pei Liang
Chemosensors 2024, 12(5), 82; https://doi.org/10.3390/chemosensors12050082 - 16 May 2024
Viewed by 279
Abstract
Surface-enhanced Raman scattering (SERS) provides an alternative rapid detection method for pesticide residues in food, but fenvalerate possesses poor affinity to the novel metal substrate, thus restricting its analysis. To break this bottleneck, a SERS-active platform with an Ag/rGO composite structure was engineered [...] Read more.
Surface-enhanced Raman scattering (SERS) provides an alternative rapid detection method for pesticide residues in food, but fenvalerate possesses poor affinity to the novel metal substrate, thus restricting its analysis. To break this bottleneck, a SERS-active platform with an Ag/rGO composite structure was engineered using a facile method for fenvalerate detection. Ag nanoparticles with a 60 nm diameter can grow evenly on the top and bottom of rGO layers under intense ultrasonic oscillation, and rGO in hybrid material acts as an ideal hotspot holder between the gaps of Ag nanoparticles, not only allowing the interaction area to be enhanced both electromagnetically and chemically but also enabling the capture and enrichment of fenvalerate pesticide molecules into the “hotspot” area to improve detection sensitivity. Ag/rGO composite substrate possesses superior SERS performance with an ultralow detectable concentration of 4-aminothiophenol (10−10 M) and good reproducibility, endowing the material with a better enhancement effect than pure Ag nanoparticles. When used as the SERS substrate for fenvalerate detection, Ag/rGO composite material showed excellent performance in both experiments and theoretical calculation, with the limit of detection (LOD) of fenvalerate being as low as 1.69 × 10−5 mg/kg and a detection model with an R2 of 99.2%, demonstrating its exciting potential as a SERS substrate for pesticides detection. Full article
(This article belongs to the Special Issue Recent Advances in Optical Chemo- and Biosensors)
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