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Micromachines
Special Issues
Plasmonic Sensors and Their Applications
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Plasmonic Sensors and Their Applications

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A：Physics".

Deadline for manuscript submissions: closed (30 June 2024) | Viewed by 3607

Special Issue Editors

Dr. Kundan Sivashanmugan

E-Mail Website
Guest Editor
Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
Interests: plasmonic; biosensing; biophotonics; SERS; nanoendoscopy
Special Issues, Collections and Topics in MDPI journals
Dr. Xianming Kong

E-Mail Website
Guest Editor
School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China
Interests: spectroscopy; nanomaterials; plasmonic; sensor

Special Issue Information

Dear Colleagues,

In this Special Issue, we explore plasmonic sensors for a wide range of applications, as well as plasmonic sensing that is based on artificial intelligence.

Plasmonics is the study of the events that occur as a result of the oscillation of free electrons on the surface of a metal when the metal is subjected to the stimulation of light. This field has also achieved noteworthy and substantial breakthroughs in sensor technology over the last couple of decades. It is important to note that plasmonic sensors can be roughly divided into two types, surface-enhanced spectroscopic sensors and surface plasmon resonance (SPR) sensors, depending on the type of interaction that takes place between the outgoing photons and the plasmonic material. Surface-enhanced spectroscopic sensors measure light at the surface of an object, while surface plasmon resonance sensors measure light at the surface of an object.

In addition to this, there are normally two SPR modes that are investigated: localized surface plasmon resonance when the plasmons are closely bound to the surface of colloidal nanoparticles or other nanostructures, and propagating surface plasmon resonance at the flat dielectric–metal interface. Additionally, plasmon-based sensing has garnered a lot of interest in recent years due to the fact that it has a high sensing efficiency, low cost, small device footprint, stability, and a remarkable diversity, availability, and reusability of optically functional materials. The existing sensor technology is up against a number of substantial challenges, one of the most critical of which is the investigation of novel nanostructures with designer functions.

This Special Issue's coverage of the many plasmonic surface applications in optical sensing, such as biosensing, chemical sensing, gas sensing, and environmental monitoring, is one of its main goals.

This Special Issue is especially interested in (1) plasmonic nanomaterial characterization, (2) label free plasmonic sensing for chemical and biomaterials, (3) plasmonic surface for SPR/LSPR/SERS/TERS, and 4) computational and developing artificial intelligence based on plasmonic sensors. Researchers are encouraged to contribute to this Special Issue: full research papers, communications or reviews focusing on the keywords specified above are all acceptable forms of contribution.

Dr. Kundan Sivashanmugan
Dr. Xianming Kong
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. Micromachines 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 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

  • plasmonic-nanomaterials
  • biomaterials
  • biophotonics
  • biosensing
  • label-free sensing
  • SPR
  • LSPR
  • TERS
  • SERS

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Published Papers (2 papers)

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Research

10 pages, 2856 KiB  
Article
Real-Time Plasmonic Strain Sensors Based on Surface Relief Diffraction Gratings
by Yazan Bdour and Ribal Georges Sabat
Micromachines 2024, 15(7), 863; https://doi.org/10.3390/mi15070863 - 30 Jun 2024
Viewed by 864
Abstract
Large-scale diffraction gratings were fabricated in surface relief on azobenzene thin films and transferred to flexible PDMS substrates using soft lift-off lithography. The PDMS gratings were strained along the grating vector axis and the resulting surface topography was analyzed using diffraction angle measurements, [...] Read more.
Large-scale diffraction gratings were fabricated in surface relief on azobenzene thin films and transferred to flexible PDMS substrates using soft lift-off lithography. The PDMS gratings were strained along the grating vector axis and the resulting surface topography was analyzed using diffraction angle measurements, AFM imagery and surface plasmon resonance (SPR) spectra. All measurement methods exhibited a linear response in strain indicating the useability of these sensors in real-world applications. For SPR-based strain sensing, an increasing pitch and a decreasing modulation depth were observed with increasing strain. The SPR peak shifted by ~1.0 nm wavelength and the SPR intensity decreased by ~0.3 a.u. per percentage of applied strain. The tested PDMS samples retained their integrity even after multiple cycles of stretching and relaxation, making them a suitable strain sensor. Full article
(This article belongs to the Special Issue Plasmonic Sensors and Their Applications)
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16 pages, 3793 KiB  
Article
Simple and Fast Pesticide Nanosensors: Example of Surface Plasmon Resonance Coumaphos Nanosensor
by Beste Oymen, Mitra Jalilzadeh, Fatma Yılmaz, Süleyman Aşır, Deniz Türkmen and Adil Denizli
Micromachines 2023, 14(4), 707; https://doi.org/10.3390/mi14040707 - 23 Mar 2023
Cited by 4 | Viewed by 1885
Abstract
Here, a molecular imprinting technique was employed to create an SPR-based nanosensor for the selective and sensitive detection of organophosphate-based coumaphos, a toxic insecticide/veterinary drug often used. To achieve this, UV polymerization was used to create polymeric nanofilms using N-methacryloyl-l-cysteine [...] Read more.
Here, a molecular imprinting technique was employed to create an SPR-based nanosensor for the selective and sensitive detection of organophosphate-based coumaphos, a toxic insecticide/veterinary drug often used. To achieve this, UV polymerization was used to create polymeric nanofilms using N-methacryloyl-l-cysteine methyl ester, ethylene glycol dimethacrylate, and 2-hydroxyethyl methacrylate, which are functional monomers, cross-linkers, and hydrophilicity enabling agents, respectively. Several methods, including scanning electron microscopy (SEM), atomic force microscopy (AFM), and contact angle (CA) analyses, were used to characterize the nanofilms. Using coumaphos-imprinted SPR (CIP-SPR) and non-imprinted SPR (NIP-SPR) nanosensor chips, the kinetic evaluations of coumaphos sensing were investigated. The created CIP-SPR nanosensor demonstrated high selectivity to the coumaphos molecule compared to similar competitor molecules, including diazinon, pirimiphos-methyl, pyridaphenthion, phosalone, N-2,4(dimethylphenyl) formamide, 2,4-dimethylaniline, dimethoate, and phosmet. Additionally, there is a magnificent linear relationship for the concentration range of 0.1–250 ppb, with a low limit of detection (LOD) and limit of quantification (LOQ) of 0.001 and 0.003 ppb, respectively, and a high imprinting factor (I.F.4.4) for coumaphos. The Langmuir adsorption model is the best appropriate thermodynamic approach for the nanosensor. Intraday trials were performed three times with five repetitions to statistically evaluate the CIP-SPR nanosensor’s reusability. Reusability investigations for the two weeks of interday analyses also indicated the three-dimensional stability of the CIP-SPR nanosensor. The remarkable reusability and reproducibility of the procedure are indicated by an RSD% result of less than 1.5. Therefore, it has been determined that the generated CIP-SPR nanosensors are highly selective, rapidly responsive, simple to use, reusable, and sensitive for coumaphos detection in an aqueous solution. An amino acid, which was used to detect coumaphos, included a CIP-SPR nanosensor manufactured without complicated coupling methods and labelling processes. Liquid chromatography with tandem mass spectrometry (LC/MS-MS) studies was performed for the validation studies of the SPR. Full article
(This article belongs to the Special Issue Plasmonic Sensors and Their Applications)
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