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Chemosensors
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Radiation-Based Sensors and Nanosensors
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Radiation-Based Sensors and Nanosensors

A special issue of Chemosensors (ISSN 2227-9040).

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 26401

Special Issue Editor

Prof. Dr. Changhyun Roh

E-Mail Website
Guest Editor
1. Decommissioning Technology Research Division, Korea Atomic Energy Research Institute (KAERI), 989-111 Daedukdaero, Yuseong, Daejeon 34057, Republic of Korea
2. Advanced Radiation Technology Institute (ARTI), Korea Atomic Energy Research Institute (KAERI), Jeonbuk 56212, Republic of Korea
3. Quantum Energy Chemical Engineering, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
Interests: radiochemistry; radiation chemistry; nanomaterials; nanotechnology; nuclear energy; decommissioning and decontamination science and technology; environmental science and technology; radioactive isotopes; radiation; chemical engineering; separation technology; catalysis; biotechnology; education; sustainability; chemosensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Radiation-based and nanomaterial-based sensing play a pivotal role in many fields, and they pose important challenges for sensing in real situations and environments. Radiation sensing technology, particularly for nuclear security and decommissioning and their applications, is required for operating in unknown environments and can detect and monitor radiation areas. Moreover, nanosensors are chemical or nanomaterial sensors that can be used to detect the presence of chemical species and nanoparticles or monitor physical parameters on the nanoscale. This Special Issue includes finding use in nanotechnology-based sensing applications. This Special Issue solicits recent advances in radiation-based sensing with a particular focus on chemical sensors. A chemical sensor is a self-contained analytical tool that can provide information about the chemical composition of its environment, that is, a liquid or a gas condition. This Special Issue will cover both theory and practice, among other relevant topics. Chemosensors publishes original papers, review articles, communications, technical notes, perspectives, and letters to the editor. Authors are encouraged to submit manuscripts that bridge the gaps between research, development, and implementation.

Prof. Dr. Changhyun Roh
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.

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. Chemosensors 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 2700 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

  • Nanosensors;
  • Nanotechnology;
  • Chemical sensors;
  • Radiation sensors;
  • Nuclear energy;
  • Decommissioning and decontamination;
  • Assay.

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Published Papers (4 papers)

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Research

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14 pages, 9537 KiB  
Article
Optimization of Plastic Scintillator for Detection of Gamma-Rays: Simulation and Experimental Study
by Sujung Min, Youngsu Kim, Kwang-Hoon Ko, Bumkyung Seo, JaeHak Cheong, Changhyun Roh and Sangbum Hong
Chemosensors 2021, 9(9), 239; https://doi.org/10.3390/chemosensors9090239 - 25 Aug 2021
Cited by 14 | Viewed by 6673
Abstract
Plastic scintillators are widely used in various radiation measurement applications, and the use of plastic scintillators for nuclear applications including decommissioning, such as gamma-ray detection and measurement, is an important concern. With regard to efficient and effective gamma-ray detection, the optimization for thickness [...] Read more.
Plastic scintillators are widely used in various radiation measurement applications, and the use of plastic scintillators for nuclear applications including decommissioning, such as gamma-ray detection and measurement, is an important concern. With regard to efficient and effective gamma-ray detection, the optimization for thickness of plastic scintillator is strongly needed. Here, we elucidate optimization of the thickness of high-performance plastic scintillator using high atomic number material. Moreover, the EJ-200 of commercial plastic scintillators with the same thickness was compared. Two computational simulation codes (MCNP, GEANT4) were used for thickness optimization and were compared with experimental results to verify data obtained by computational simulation. From the obtained results, it was confirmed that the difference in total counts was less than 10% in the thickness of the scintillator of 50 mm or more, which means optimized thickness for high efficiency gamma-ray detection such as radioactive 137Cs and 60CO. Finally, simulated results, along with experimental data, were discussed in this study. The results of this study can be used as basic data for optimizing the thickness of plastic scintillators using high atomic number elements for radiation detection and monitoring. Full article
(This article belongs to the Special Issue Radiation-Based Sensors and Nanosensors)
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12 pages, 3083 KiB  
Communication
A Boost Converter Employing Quadratic Sawtooth Waveform Generator for SiPM-Based Radiation Sensors
by Hyuntak Jeon
Chemosensors 2021, 9(6), 144; https://doi.org/10.3390/chemosensors9060144 - 16 Jun 2021
Cited by 2 | Viewed by 2354
Abstract
This paper proposes an optimized step-up power converter using a quadratic sawtooth waveform generator for a silicon photomultiplier (SiPM) used as a radiation sensor for mobile radiation dosimeters. Although our step-up converter uses the topology of a switched inductor boost converter in voltage [...] Read more.
This paper proposes an optimized step-up power converter using a quadratic sawtooth waveform generator for a silicon photomultiplier (SiPM) used as a radiation sensor for mobile radiation dosimeters. Although our step-up converter uses the topology of a switched inductor boost converter in voltage mode, it achieves a fast transient performance thanks to the proposed quadratic sawtooth waveform generator, which can increase the loop bandwidth. As a result, the proposed boost converter can stably regulate the bias voltage of an SiPM, even in a situation where the radiation particles are injected. In addition, since the proposed quadratic sawtooth waveform generator can be designed with low power, it was able to achieve 86% peak efficiency even under the light load conditions. Full article
(This article belongs to the Special Issue Radiation-Based Sensors and Nanosensors)
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14 pages, 3790 KiB  
Article
Preliminary Studies of Perovskite-Loaded Plastic Scintillator Prototypes for Radioactive Strontium Detection
by Hara Kang, Sujung Min, Bumkyung Seo, Changhyun Roh, Sangbum Hong and Jae Hak Cheong
Chemosensors 2021, 9(3), 53; https://doi.org/10.3390/chemosensors9030053 - 8 Mar 2021
Cited by 16 | Viewed by 4619
Abstract
Functional plastic scintillators have attracted much attention for their usefulness in on-site monitoring and detection in environments. In this study, we elucidated a highly reliable and functional plastic scintillator for detection of radioactive strontium, which means a potent perovskite-loaded polymeric scintillation material based [...] Read more.
Functional plastic scintillators have attracted much attention for their usefulness in on-site monitoring and detection in environments. In this study, we elucidated a highly reliable and functional plastic scintillator for detection of radioactive strontium, which means a potent perovskite-loaded polymeric scintillation material based on epoxy and 2,5-diphenyloxazole (PPO). Moreover, Monte Carlo N-Particle (MCNP) simulation was performed to optimize the thickness of a plastic scintillator for efficient strontium detection. A thickness of 2 mm was found to be the optimum thickness for strontium beta-ray detection. A newly developed plastic scintillator with 430 nm emission from perovskite loading could trigger scintillation enhancement employing potential indication of perovskite energy transfer into a photomultiplier (PMT) detector. Furthermore, the response to beta-ray emitter of 90Sr was compared to commercial scintillator of BC-400 by exhibiting detection efficiency in the energy spectrum with a fabricated perovskite-loaded plastic scintillator. We believe that this suggested functional plastic scintillator could be employed as a radiation detector for strontium detection in a wide range of applications including decommissioning sites in nuclear facilities, nuclear security and monitoring, nonproliferation, and safeguards. Full article
(This article belongs to the Special Issue Radiation-Based Sensors and Nanosensors)
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Review

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42 pages, 14181 KiB  
Review
Low Energy Beta Emitter Measurement: A Review
by Hara Kang, Sujung Min, Bumkyung Seo, Changhyun Roh, Sangbum Hong and Jae Hak Cheong
Chemosensors 2020, 8(4), 106; https://doi.org/10.3390/chemosensors8040106 - 28 Oct 2020
Cited by 21 | Viewed by 11421
Abstract
The detection and monitoring systems of low energy beta particles are of important concern in nuclear facilities and decommissioning sites. Generally, low-energy beta-rays have been measured in systems such as liquid scintillation counters and gas proportional counters but time is required for pretreatment [...] Read more.
The detection and monitoring systems of low energy beta particles are of important concern in nuclear facilities and decommissioning sites. Generally, low-energy beta-rays have been measured in systems such as liquid scintillation counters and gas proportional counters but time is required for pretreatment and sampling, and ultimately it is difficult to obtain a representation of the observables. The risk of external exposure for low energy beta-ray emitting radioisotopes has not been significantly considered due to the low transmittance of the isotopes, whereas radiation protection against internal exposure is necessary because it can cause radiation hazard to into the body through ingestion and inhalation. In this review, research to produce various types of detectors and to measure low-energy beta-rays by using or manufacturing plastic scintillators such as commercial plastic and optic fiber is discussed. Furthermore, the state-of-the-art beta particle detectors using plastic scintillators and other types of beta-ray counters were elucidated with regard to characteristics of low energy beta-ray emitting radioisotopes. Recent rapid advances in organic matter and nanotechnology have brought attention to scintillators combining plastics and nanomaterials for all types of radiation detection. Herein, we provide an in-depth review on low energy beta emitter measurement. Full article
(This article belongs to the Special Issue Radiation-Based Sensors and Nanosensors)
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