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Technologies
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New Technologies for Sensors
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New Technologies for Sensors

A special issue of Technologies (ISSN 2227-7080). This special issue belongs to the section "Information and Communication Technologies".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 846

Special Issue Editors

Dr. Silvia Rizzato

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Guest Editor
Omnics Research Group, Department of Mathematics and Physics, University of Salento, CNR-Institute of Nanotechnology, INFN Sezione di Lecce, Via per Monteroni, 73100 Lecce, Italy
Interests: sensors; microfluidics and lab-on-a-chip; microfabrication; spintronics and nanomagnetism; scanning probe microscopy
Special Issues, Collections and Topics in MDPI journals
Dr. Antonino Proto

E-Mail Website
Guest Editor
Medical Physics Research Group, Department of Neuroscience and Rehabilitation, University of Ferrara, INFN Sezione di Ferrara, Via G. Saragat 1, 44122 Ferrara, Italy
Interests: wearables; electronics; measurements; signal processing; medical physics; bioengineering; telemedicine

Special Issue Information

Dear Colleagues,

Advancements in sensor technologies are revolutionizing the way we monitor, detect, and analyze various physical, chemical, and biological phenomena. This Special Issue explores cutting-edge developments in areas such as surface acoustic wave sensors, localized surface plasmon resonance, spectroscopy impedance, split-ring resonators, magnetoresistive sensors, piezoelectric sensors, and transistor-based sensors. These innovations are driving progress in applications ranging from biomedical diagnostics to environmental monitoring and material characterization.

Particular emphasis is given to integrating these advanced sensors into innovative platforms, such as lab-on-a-chip systems, which enable compact and multifunctional solutions. Their deployment in the Internet of Things (IoT) ecosystem is also explored, showcasing their potential to create interconnected, data-driven environments. Contributions addressing novel designs, materials, and emerging applications are invited, with the aim of inspiring research that defines the future of sensor technology.

Dr. Silvia Rizzato
Dr. Antonino Proto
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. Technologies 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 1600 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

  • sensors
  • wearables
  • lab-on-a-chip
  • IoT
  • advanced sensing technologies
  • micro- and nanotechnology

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

31 pages, 9296 KiB  
Article
An Experimental and Numerical Analysis of the Influence of Surface Roughness on Supersonic Flow in a Nozzle Under Atmospheric and Low-Pressure Conditions
by Pavla Šabacká, Jiří Maxa, Robert Bayer, Tomáš Binar, Petr Bača, Jana Švecová, Jaroslav Talár and Martin Vlkovský
Technologies 2025, 13(4), 160; https://doi.org/10.3390/technologies13040160 - 16 Apr 2025
Viewed by 237
Abstract
The ongoing research in Environmental Scanning Electron Microscopy (ESEM) is contributed to in this paper. Specifically, this study investigates supersonic flow in a nozzle aperture under low-pressure conditions at the continuum mechanics boundary. This phenomenon is prevalent in the differentially pumped chamber of [...] Read more.
The ongoing research in Environmental Scanning Electron Microscopy (ESEM) is contributed to in this paper. Specifically, this study investigates supersonic flow in a nozzle aperture under low-pressure conditions at the continuum mechanics boundary. This phenomenon is prevalent in the differentially pumped chamber of an ESEM, which separates two regions with a significant pressure gradient using an aperture with a pressure ratio of approximately 10:1 in the range of 10,000 to 100 Pa. The influence of nozzle wall roughness on the boundary layer characteristics and its subsequent impact on the oblique shock wave behavior, and consequently, on the static pressure distribution along the flow axis, is solved in this paper. It demonstrates the significant effect of varying inertial-to-viscous force ratios at low pressures on the resulting impact of roughness on the oblique shock wave characteristics. The resulting oblique shock wave distribution significantly affects the static pressure profile along the axis, which can substantially influence the scattering and loss of the primary electron beam traversing the differential pumping stage. This, in turn, affects the sharpness of the resulting image. The boundary layer within the nozzle plays a crucial role in determining the overall flow characteristics and indirectly affects beam scattering. This study examines the influence of surface roughness and quality of the manufactured nozzle on the resulting flow behavior. The initial results obtained from experimental measurements using pressure sensors, when compared to CFD simulation results, demonstrate the necessity of accurately setting roughness values in CFD calculations to ensure accurate results. The CFD simulation has been validated against experimental data, enabling further simulations. The research combines physical theory, CFD simulations, advanced experimental sensing techniques, and precision manufacturing technologies for the critical components of the experimental setup. Full article
(This article belongs to the Special Issue New Technologies for Sensors)
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18 pages, 1707 KiB  
Article
Resonance-Induced Capacitively Coupled Contactless Conductivity Detection (ReC4D) Unit for Nucleic Acid Amplification Testing
by Roberto G. Ramírez-Chavarría, Jorge A. Uc-Martín, Bryan E. Alvarez-Serna and Ramón F. Padilla-Morán
Technologies 2025, 13(4), 138; https://doi.org/10.3390/technologies13040138 - 2 Apr 2025
Viewed by 278
Abstract
Nucleic acid amplification (NAA) is a technique that increases the number of copies of a gene, making it possible to detect microorganisms. This technique is often used in clinical tests, biochemical analysis, and environmental assays, to mention only a few. However, developing portable, [...] Read more.
Nucleic acid amplification (NAA) is a technique that increases the number of copies of a gene, making it possible to detect microorganisms. This technique is often used in clinical tests, biochemical analysis, and environmental assays, to mention only a few. However, developing portable, robust, and low-cost measurement platforms to evaluate NAA products remains a technological challenge. Therefore, in this work, we introduce an attractive unit for detecting and quantifying nucleic acids based on the capacitively coupled contactless conductivity detection (C4D) principle. The proposed unit, ReC4D, combines electrical resonance with C4D to enhance sensitivity when evaluating an NAA reaction. The ReC4D units advantages are twofold: (i) the transducer is electrically isolated to allow its reuse, and (ii) the induced electrical resonance in the ReC4D unit minimizes the stray capacitances of the conventional C4D assays, which enhances sensitivity, increases the linear operating range, and improves the limit of detection (LoD). Furthermore, we evaluated the proposed device for quantifying different concentrations of SARS-CoV-2 genetic material and compared it with measurements from a conventional C4D unit. Thus, we demonstrate that the ReC4D unit can measure concentrations of NAA products with an LoD of 0.24 copyμL and a sensitivity of 5.618 kHzlog(copyμL). These results position the ReC4D unit close to the state-of-the-art NAA testing platforms, with the added value of a low cost, robustness, reusability, and affordability. Full article
(This article belongs to the Special Issue New Technologies for Sensors)
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22 pages, 9638 KiB  
Article
Moving the Open-Source Broadly Reconfigurable and Expandable Automation Device (BREAD) Towards a Supervisory Control and Data Acquisition (SCADA) System
by Finn K. Hafting, Alexander W. H. Chin, Jeff T. Hafting and Joshua M. Pearce
Technologies 2025, 13(4), 125; https://doi.org/10.3390/technologies13040125 - 23 Mar 2025
Viewed by 219
Abstract
While the free and open-source Broadly Reconfigurable and Expandable Automation Device (BREAD) has demonstrated functionality as an inexpensive replacement for many commercial controllers, some aspects of its design require updating to make it more aligned with commercial supervisory control and data acquisition (SCADA) [...] Read more.
While the free and open-source Broadly Reconfigurable and Expandable Automation Device (BREAD) has demonstrated functionality as an inexpensive replacement for many commercial controllers, some aspects of its design require updating to make it more aligned with commercial supervisory control and data acquisition (SCADA) systems. Some of these updates to BREAD for version 2 included improvements to the mechanical design for stability with an alignment cover, rail mounting with Deutsche Institut für Normung (DIN) rail clips, ESP32 Loaf Controller with local wireless connectivity, and open-source web browser-based software control. These updates were validated by comparing BREAD v2 to an existing commercial controller used for airline-based pH control for industrial seaweed production. BREAD v2 was integrated into an electrical enclosure complete with pH probes, CO2 lines, solenoid valves, and a power supply. After comparing the two approaches, BREAD v2 was found to be more precise by roughly a factor of five, and less expensive by a factor of three than proprietary systems, while also offering additional functionality like data logging and wireless monitoring. Although able to match or beat specific functions of SCADA systems, future work is needed to transform BREAD into a full SCADA system. Full article
(This article belongs to the Special Issue New Technologies for Sensors)
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