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Molecular Opto-Electronic Sensing Devices and Techniques
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Molecular Opto-Electronic Sensing Devices and Techniques

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

Deadline for manuscript submissions: 15 April 2025 | Viewed by 12636

Special Issue Editors

Dr. Longhua Tang

E-Mail Website
Guest Editor
College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
Interests: optical sensor; photonic biosensor; tunnelling sensor; electrochemical biosensor; biochip
Special Issues, Collections and Topics in MDPI journals
Dr. Shenglin Cai

E-Mail Website
Guest Editor
Center for Misfolding Disease, Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
Interests: development of single-molecule technology; high-throughput screening of biomarkers; early-stage disease diagnostics
Dr. Ren Ren

E-Mail Website
Guest Editor
Faculty of Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College London, Du Cane Road, London W12 0NN, UK
Interests: single-molecule methods; novel biosensing techniques; biomolecule binding and dynamics; novel biomolecular probes (nanobody, aptamer, etc.)

Special Issue Information

Dear Colleagues,

With the recent developments in molecule-related electronics and photonics, the interplay among molecules, electrons and photons has attracted increasing attention in fields ranging from physics to biology to chemistry, leading to a new research direction termed “molecular opto-electronics ”. Molecular opto-electronics is the study and application of molecule-integrated opto-electronic devices, or instruments that use such devices, for the detection, manipulation and application of light, electrons or chemical molecules. Efforts are underway to extend the applications of molecular opto-electronic devices to various sensing fields, offering new opportunities for biosensing, high-precision therapies, human–machine interfaces, etc. Among such innovations are single-molecule optical and electronic sensors, which have achieved great success in a variety of environments, including scanning tunneling microscopy (STM, tunneling sensing, nanopore ionic sensors, single-molecule fluorescence, fluorescence resonance energy transfer (FRET), surface-enhanced Raman spectroscopy (SERS) and plasmonic resonance shift. Several schemes and devices for simultaneous opto-electronic measurement have also been developed. This Special Issue covers the latest research on molecular opto-electronic sensing techniques, including the design and fabrication of opto-electronic devices, instrumentation, measurement, postprocessing and various bio/chemical sensing applications.

Dr. Longhua Tang
Dr. Shenglin Cai
Dr. Ren Ren
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. 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

  • molecular opto-electronic devices
  • single-molecule detection
  • tunneling sensor
  • fluorescence
  • nanopore
  • plasmonic sensors
  • vibrational spectrum

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Published Papers (3 papers)

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Research

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16 pages, 6586 KiB  
Article
Refractive Index Measurement Using SOI Photodiode with SP Antenna toward SOI CMOS-Compatible Integrated Optical Biosensor
by Hiroaki Satoh, Koki Isogai, Shohei Iwata, Taiki Aso, Ryosuke Hayashi, Shu Takeuchi and Hiroshi Inokawa
Sensors 2023, 23(2), 568; https://doi.org/10.3390/s23020568 - 4 Jan 2023
Cited by 1 | Viewed by 2384
Abstract
This paper proposes a new optical biosensor composed of a silicon-on-insulator (SOI) p–n junction photodiode (PD) with a surface plasmon (SP) antenna. When the phase-matching condition between two lateral wavelengths of the diffracted light from the SP antenna and the waveguiding mode in [...] Read more.
This paper proposes a new optical biosensor composed of a silicon-on-insulator (SOI) p–n junction photodiode (PD) with a surface plasmon (SP) antenna. When the phase-matching condition between two lateral wavelengths of the diffracted light from the SP antenna and the waveguiding mode in the SOI PD is satisfied, we observe sharp peaks in the spectroscopic light sensitivity. Since the peak wavelength depends on the RI change around the SP antenna corresponding to the phase-matching condition, the SOI PDs with an SP antenna can be applied to the optical biosensor. The RI detection limit is evaluated in the measurements with bulk solutions, and 1.11 × 10−5 RIU (refractive index unit) can be obtained, which is comparable to that of a surface plasmon resonance (SPR) sensor, which is well known as a representative optical biosensor. In addition, the response for intermolecular bonds is estimated by the electromagnetic simulations using the finite-difference time-domain (FDTD) method to clarify its ability to detect biomolecular interactions. The results of this paper will provide new ground for high-throughput label-free biosensing, since a large number of SOI PDs with an SP antenna can be easily integrated on a single chip via an SOI complementary metal-oxide-semiconductor (CMOS) fabrication process. Full article
(This article belongs to the Special Issue Molecular Opto-Electronic Sensing Devices and Techniques)
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13 pages, 1661 KiB  
Article
Machine Learning-Assisted Synchronous Fluorescence Sensing Approach for Rapid and Simultaneous Quantification of Thiabendazole and Fuberidazole in Red Wine
by Jia-Rong He, Jia-Wen Wei, Shi-Yi Chen, Na Li, Xiu-Di Zhong and Yao-Qun Li
Sensors 2022, 22(24), 9979; https://doi.org/10.3390/s22249979 - 18 Dec 2022
Cited by 3 | Viewed by 1977
Abstract
Rapid analysis of components in complex matrices has always been a major challenge in constructing sensing methods, especially concerning time and cost. The detection of pesticide residues is an important task in food safety monitoring, which needs efficient methods. Here, we constructed a [...] Read more.
Rapid analysis of components in complex matrices has always been a major challenge in constructing sensing methods, especially concerning time and cost. The detection of pesticide residues is an important task in food safety monitoring, which needs efficient methods. Here, we constructed a machine learning-assisted synchronous fluorescence sensing approach for the rapid and simultaneous quantitative detection of two important benzimidazole pesticides, thiabendazole (TBZ) and fuberidazole (FBZ), in red wine. First, fluorescence spectra data were collected using a second derivative constant-energy synchronous fluorescence sensor. Next, we established a prediction model through the machine learning approach. With this approach, the recovery rate of TBZ and FBZ detection of pesticide residues in red wine was 101% ± 5% and 101% ± 15%, respectively, without resorting complicated pretreatment procedures. This work provides a new way for the combination of machine learning and fluorescence techniques to solve the complexity in multi-component analysis in practical applications. Full article
(This article belongs to the Special Issue Molecular Opto-Electronic Sensing Devices and Techniques)
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Review

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16 pages, 2339 KiB  
Review
Single-Molecule Surface-Enhanced Raman Spectroscopy
by Yuxuan Qiu, Cuifang Kuang, Xu Liu and Longhua Tang
Sensors 2022, 22(13), 4889; https://doi.org/10.3390/s22134889 - 29 Jun 2022
Cited by 43 | Viewed by 7131
Abstract
Single-molecule surface-enhanced Raman spectroscopy (SM-SERS) has the potential to detect single molecules in a non-invasive, label-free manner with high-throughput. SM-SERS can detect chemical information of single molecules without statistical averaging and has wide application in chemical analysis, nanoelectronics, biochemical sensing, etc. Recently, a [...] Read more.
Single-molecule surface-enhanced Raman spectroscopy (SM-SERS) has the potential to detect single molecules in a non-invasive, label-free manner with high-throughput. SM-SERS can detect chemical information of single molecules without statistical averaging and has wide application in chemical analysis, nanoelectronics, biochemical sensing, etc. Recently, a series of unprecedented advances have been realized in science and application by SM-SERS, which has attracted the interest of various fields. In this review, we first elucidate the key concepts of SM-SERS, including enhancement factor (EF), spectral fluctuation, and experimental evidence of single-molecule events. Next, we systematically discuss advanced implementations of SM-SERS, including substrates with ultra-high EF and reproducibility, strategies to improve the probability of molecules being localized in hotspots, and nonmetallic and hybrid substrates. Then, several examples for the application of SM-SERS are proposed, including catalysis, nanoelectronics, and sensing. Finally, we summarize the challenges and future of SM-SERS. We hope this literature review will inspire the interest of researchers in more fields. Full article
(This article belongs to the Special Issue Molecular Opto-Electronic Sensing Devices and Techniques)
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