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Emerging Trends in Optical Sensing: Advanced Materials for Enhanced Light-Matter Interactions

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

Deadline for manuscript submissions: 25 June 2025 | Viewed by 1529

Special Issue Editor


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Guest Editor
Chemistry, KU Leuven, Leuven, Belgium
Interests: nonlinear optics; plasmonics; scattering; spectroscopy; biological interfaces; optical read-out
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue highlights emerging trends in optical sensing, focusing on advanced materials for enhanced light-matter interactions, including the detection and analysis of chiral properties. Optical sensing spans a broad spectrum of techniques, such as Faraday effects, luminescence (fluorescence, phosphorescence, and chemiluminescence), nonlinear optical phenomena, and photonic crystal-based approaches. We invite contributions that advance the understanding, design, methodology, and application of optical sensors, particularly those which could be eventually applied in life-sciences. Studies focused on the role of chirality, both through photon spin- and orbital angular momentum, in light-matter interactions and their implications for sensing are strongly encouraged.

Join us in showcasing the latest breakthroughs and paving the way for future innovations in this dynamic and interdisciplinary field.

Dr. Yovan de Coene
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.

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Keywords

  • optical sensors
  • chirality
  • Faraday effect
  • photonic crystals
  • metastructures
  • luminescence
  • nanoparticles
  • nonlinear optics
  • spin angular momentum
  • orbital angular momentum

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Published Papers (1 paper)

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Research

14 pages, 1529 KiB  
Article
Luminescence Lifetime-Based Water Conductivity Sensing Using a Cationic Dextran-Supported Ru(II) Polypyridyl Complex
by Ya Jie Knöbl, Lauren M. Johnston, José Quílez-Alburquerque and Guillermo Orellana
Sensors 2025, 25(1), 121; https://doi.org/10.3390/s25010121 - 28 Dec 2024
Cited by 1 | Viewed by 1193
Abstract
Water conductivity sensing relies universally on electrical measurements, which are subject to corrosion of the electrodes and subsequent signal drift in prolonged in situ uses. Furthermore, they cannot provide contactless sensing or remote readout. To this end, a novel device for water conductivity [...] Read more.
Water conductivity sensing relies universally on electrical measurements, which are subject to corrosion of the electrodes and subsequent signal drift in prolonged in situ uses. Furthermore, they cannot provide contactless sensing or remote readout. To this end, a novel device for water conductivity monitoring has been developed by employing a microenvironment-sensitive ruthenium complex, [Ru(2,2′-bipyridine-4,4′-disulfonato)3]4−, embedded into a quaternary ammonium functionalized cross-linked polymer support. The degree of swelling of the latter, which leads to a change in the emission lifetime, depends on the water conductivity. The sensor displays a reversible response (2 min ≤ t90 ≤ 3 min) and has been shown to be stable for >65 h of continuous monitoring of 0.8–12.8 mS cm−1 KCl solutions. Changes to the cation do not affect the sensor response, while changes to the anion type induce small effects. Variations in the dissolved O2 or temperature require corrections of the response. The sensor can be interrogated alongside dissolved O2 and pH luminescent sensors based on the same family of indicator dyes to exploit the definite advantages of luminescence lifetime-based detection. Full article
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