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Special Issue "I3S 2021 Selected Papers"

A special issue of Sensors (ISSN 1424-8220).

Deadline for manuscript submissions: 31 May 2022.

Special Issue Editors

Prof. Dr. Gianaurelio Cuniberti
E-Mail Website
Guest Editor
Technische Universität Dresden, Dresden, Germany
Interests: theory of the electronic and structural properties of nanoscale materials; materials research; molecular electronics; sensorics; bioelectronics; environmental nanoscience
Special Issues, Collections and Topics in MDPI journals
Dr. Larysa Baraban
E-Mail Website
Guest Editor
1. Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, Budapesterstr. 27, 01069 Dresden, Germany
2. Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany
3. Institute of Radiopharmaceutical Cancer Research, Helmholtz Center Dresden Rossendorf, 01328 Dresden, Germany
Interests: nanobiotechnology; biosensor systems; droplet-based microfludics; lab-on-chip; artificial micromachines
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue was created in collaboration with the 8th International Symposium on Sensor Science (I3S 2021), held virtually from 17 to 28 May 2021. It comprises six topical sessions that cover the most exciting aspects of sensor science (see below for a list of topics). The conference participants are cordially invited to contribute a full manuscript to this Special Issue and receive a 20% discount on the publishing fees.

S1. Nano(bio)sensors and bioelectronics
S2. Chemical sensors
S3. Physical sensors
S4. Sensor applications and smart systems
S5. SPECIAL SESSION. Organic sensors and systems
S6. SPECIAL SESSION. Flexible and stretchable sensors

Dr. Larysa Baraban
Prof. Gianaurelio Cuniberti
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 papers will be 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 2400 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.

Published Papers (6 papers)

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Research

Article
Magnetic Carbon Nanofiber Mats for Prospective Single Photon Avalanche Diode (SPAD) Sensing Applications
Sensors 2021, 21(23), 7873; https://doi.org/10.3390/s21237873 - 26 Nov 2021
Viewed by 372
Abstract
Electrospinning enables simple and cost-effective production of magnetic nanofibers by adding nanoparticles to a polymer solution. In order to increase the electrical conductivity of such nanofibers, the carbonization process is crucial. In this study, the chemical and morphological properties of magnetic nanofiber mats [...] Read more.
Electrospinning enables simple and cost-effective production of magnetic nanofibers by adding nanoparticles to a polymer solution. In order to increase the electrical conductivity of such nanofibers, the carbonization process is crucial. In this study, the chemical and morphological properties of magnetic nanofiber mats prepared from polyacrylonitrile (PAN)/magnetite were investigated. In our previous studies, PAN/magnetite nanofiber mats were carbonized at 500 °C, 600 °C, and 800 °C. Here, PAN/magnetite nanofiber mats were carbonized at 1000 °C. The surface morphology of these PAN/magnetite nanofiber mats is not significantly different from nanofiber mats thermally treated at 800 °C and have remained relatively flexible at 1000 °C, which can be advantageous for various application fields. The addition of nanoparticles increased the average fiber diameter compared to pure PAN nanofiber mats and improved the dimensional stability during thermal processes. The high conductivity, the high magnetization properties, as well as shielding against electromagnetic interference of such carbonized nanofibers can be proposed for use in single photon avalanche diode (SPAD), where these properties are advantageous. Full article
(This article belongs to the Special Issue I3S 2021 Selected Papers)
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Article
A Vision-Based Approach for the Analysis of Core Characteristics of Volcanic Ash
Sensors 2021, 21(21), 7180; https://doi.org/10.3390/s21217180 - 29 Oct 2021
Viewed by 425
Abstract
Volcanic ash fall-out represents a serious hazard for air and road traffic. The forecasting models used to predict its time–space evolution require information about the core characteristics of volcanic particles, such as their granulometry. Typically, such information is gained by the spot direct [...] Read more.
Volcanic ash fall-out represents a serious hazard for air and road traffic. The forecasting models used to predict its time–space evolution require information about the core characteristics of volcanic particles, such as their granulometry. Typically, such information is gained by the spot direct observation of the ash collected at the ground or by using expensive instrumentation. In this paper, a vision-based methodology aimed at the estimation of ash granulometry is presented. A dedicated image processing paradigm was developed and implemented in LabVIEW™. The methodology was validated experimentally using digital reference images resembling different operating conditions. The outcome of the assessment procedure was very encouraging, showing an accuracy of the image processing algorithm of 1.76%. Full article
(This article belongs to the Special Issue I3S 2021 Selected Papers)
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Article
Multiple Compact Camera Fluorescence Detector for Real-Time PCR Devices
Sensors 2021, 21(21), 7013; https://doi.org/10.3390/s21217013 - 22 Oct 2021
Viewed by 324
Abstract
The polymerase chain reaction is an important technique in biological research because it tests for diseases with a small amount of DNA. However, this process is time consuming and can lead to sample contamination. Recently, real-time PCR techniques have emerged which make it [...] Read more.
The polymerase chain reaction is an important technique in biological research because it tests for diseases with a small amount of DNA. However, this process is time consuming and can lead to sample contamination. Recently, real-time PCR techniques have emerged which make it possible to monitor the amplification process for each cycle in real time. Existing camera-based systems that measure fluorescence after DNA amplification simultaneously process fluorescence excitation and emission for dozens of tubes. Therefore, there is a limit to the size, cost, and assembly of the optical element. In recent years, imaging devices for high-performance, open platforms have benefitted from significant innovations. In this paper, we propose a fluorescence detector for real-time PCR devices using an open platform camera. This system can reduce the cost, and can be miniaturized. To simplify the optical system, four low-cost, compact cameras were used. In addition, the field of view of the entire tube was minimized by dividing it into quadrants. An effective image processing method was used to compensate for the reduction in the signal-to-noise ratio. Using a reference fluorescence material, it was confirmed that the proposed system enables stable fluorescence detection according to the amount of DNA. Full article
(This article belongs to the Special Issue I3S 2021 Selected Papers)
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Article
Cloud-Based Software Architecture for Fully Automated Point-of-Care Molecular Diagnostic Device
Sensors 2021, 21(21), 6980; https://doi.org/10.3390/s21216980 - 21 Oct 2021
Viewed by 379
Abstract
This paper proposes a cloud-based software architecture for fully automated point-of-care molecular diagnostic devices. The target system operates a cartridge consisting of an extraction body for DNA extraction and a PCR chip for amplification and fluorescence detection. To facilitate control and monitoring via [...] Read more.
This paper proposes a cloud-based software architecture for fully automated point-of-care molecular diagnostic devices. The target system operates a cartridge consisting of an extraction body for DNA extraction and a PCR chip for amplification and fluorescence detection. To facilitate control and monitoring via the cloud, a socket server was employed for fundamental molecular diagnostic functions such as DNA extraction, amplification, and fluorescence detection. The user interface for experimental control and monitoring was constructed with the RESTful application programming interface, allowing access from the terminal device, edge, and cloud. Furthermore, it can also be accessed through any web-based user interface on smart computing devices such as smart phones or tablets. An emulator with the proposed software architecture was fabricated to validate successful operation. Full article
(This article belongs to the Special Issue I3S 2021 Selected Papers)
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Article
Cost-Effective Multiplex Fluorescence Detection System for PCR Chip
Sensors 2021, 21(21), 6945; https://doi.org/10.3390/s21216945 - 20 Oct 2021
Viewed by 443
Abstract
The lack of portability and high cost of multiplex real-time PCR systems limits the device to be used in POC. To overcome this issue, this paper proposes a compact and cost-effective fluorescence detection system that can be integrated to a multiplex real-time PCR [...] Read more.
The lack of portability and high cost of multiplex real-time PCR systems limits the device to be used in POC. To overcome this issue, this paper proposes a compact and cost-effective fluorescence detection system that can be integrated to a multiplex real-time PCR equipment. An open platform camera with embedded lens was used instead of photodiodes or an industrial camera. A compact filter wheel using a sliding tape is integrated, and the excitation LEDs are fixed at a 45° angle near the PCR chip, eliminating the need of additional filter wheels. The results show precise positioning of the filter wheel with an error less than 20 μm. Fluorescence detection results using a reference dye and standard DNA amplification showed comparable performance to that of the photodiode system. Full article
(This article belongs to the Special Issue I3S 2021 Selected Papers)
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Communication
Open Platform Cameras Based Bio-Imaging Evaluation System
Sensors 2021, 21(20), 6727; https://doi.org/10.3390/s21206727 - 10 Oct 2021
Viewed by 495
Abstract
With the active development of mobile devices, a variety of ultra-small, high-definition, and open platform-based cameras are being mass-produced. In this paper, we established an emulation system to verify the bio-imaging performance of the bulky and expensive high-performance cameras and various smartphone cameras [...] Read more.
With the active development of mobile devices, a variety of ultra-small, high-definition, and open platform-based cameras are being mass-produced. In this paper, we established an emulation system to verify the bio-imaging performance of the bulky and expensive high-performance cameras and various smartphone cameras that have been used in bio-imaging devices. In the proposed system, the linearity of the brightness gradient change of four types of cameras was compared and analyzed. Based on these results, three cameras were selected in order of excellent linearity, and gel image analysis results were compared. Full article
(This article belongs to the Special Issue I3S 2021 Selected Papers)
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