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Advanced Materials for Sensing Applications

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 8372

Special Issue Editor


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Guest Editor
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
Interests: nanomaterials; energy; sensor; batteries; synthesis

Special Issue Information

Dear Colleagues,

Recent advances in material design, particularly in the field of nanotechnology, have triggered significant research progress. Attributed to the high surface to volume ratio, aspect ratio, and surface area arising from nanostructured materials, they are shown to exhibit unusual physicochemical properties in comparison with their bulk counterparts. Especially, due to health and environmental concerns, several sensors, ranging from gas sensors to biosensors, have actively taken place, and more improved performance was achieved when rationally designed nanostructured materials were carefully employed for sensing applications. This Special Issue of Sensors will be dedicated to summarizing and highlighting some recent research advances in employing nanostructured materials for various sensor applications, ranging from gas sensors to biosensors. Topics include, but are not limited to the following:

1) Summary of nanostructured materials that are suited for the varoius types of sensors

2) Investigation on what kinds of nanostructured materials are best suited for what type of sensor

3) Employing nanostructured materials for specific types of sensors (such as gas sensor, biosensor, pressure sensor)

4) In-depth analysis of what factors of nanostructured materials contributed to the improvement of sensor performance

Both review papers and original research articles are welcome

Dr. Jun Young Cheong
Guest Editor

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Keywords

  • nanostructure
  • nanotechnology
  • sensor
  • detection
  • high surface area
  • 1D, 2D, 3D

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Published Papers (3 papers)

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Research

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17 pages, 2332 KiB  
Article
Smart Textile Sock System for Athletes’ Self-Correction during Functional Tasks: Formative Usability Evaluation
by Guna Semjonova, Anna Davidovica, Nikita Kozlovskis, Aleksandrs Okss and Aleksejs Katashevs
Sensors 2022, 22(13), 4779; https://doi.org/10.3390/s22134779 - 24 Jun 2022
Cited by 3 | Viewed by 2489
Abstract
(1) Background: The development of a lightweight, easy-to-use system that measures the foot’s plantar pressure is becoming an increasingly important area of research in physiotherapy. For further development of the smart sock system, a formative usability study was conducted, where the smart textile [...] Read more.
(1) Background: The development of a lightweight, easy-to-use system that measures the foot’s plantar pressure is becoming an increasingly important area of research in physiotherapy. For further development of the smart sock system, a formative usability study was conducted, where the smart textile sock sensor system was used for self-correction during functional tasks; (2) Methods: Five athletes from the football school participated in the formative usability study. Athletes performed pre-defined functional tasks for self-correction when interacting with the smart textile sock system. Formative usability evaluation methods: effectiveness (task success rate, error rate), efficiency (time-based), satisfaction evaluated by System Usability Scale (SUS); (3) Results: Formative usability indicators: task completeness effectiveness ranged from 40% to 100% in the first- and second-stage tasks. Completed task efficiency time: Stage 1, from 4.2 s (SD 1.3) to 88.8 s (SD 19.8); Stage 2, from 7.2 s (SD 1.9) to 9.6 s (SD 2.1). Satisfaction was assessed by the SUS system user group with 76 points (SD 7.42), which indicates “good” satisfaction; (4) Conclusions: formative usability indicators showed the need for technical improvements to the smart textile sock pressure sensor system. The SUS results indicate “good” satisfaction with the smart textile sock pressure sensor system and its application. Full article
(This article belongs to the Special Issue Advanced Materials for Sensing Applications)
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12 pages, 3715 KiB  
Article
Simple Fabrication of Photodetectors Based on MoS2 Nanoflakes and Ag Nanoparticles
by Peng Xiao, Ju-Hyung Kim and Soonmin Seo
Sensors 2022, 22(13), 4695; https://doi.org/10.3390/s22134695 - 22 Jun 2022
Viewed by 1989
Abstract
Low-dimensional transition-metal dichalcogenides (TMDs) have recently emerged as promising materials for electronics and optoelectronics. In particular, photodetectors based on mono- and multilayered molybdenum disulfide (MoS2) have received much attention owing to their outstanding properties, such as high sensitivity and responsivity. In [...] Read more.
Low-dimensional transition-metal dichalcogenides (TMDs) have recently emerged as promising materials for electronics and optoelectronics. In particular, photodetectors based on mono- and multilayered molybdenum disulfide (MoS2) have received much attention owing to their outstanding properties, such as high sensitivity and responsivity. In this study, photodetectors based on dispersed MoS2 nanoflakes (NFs) are demonstrated. MoS2 NFs interact with Ag nanoparticles (NPs) via low-temperature annealing, which plays a crucial role in determining device characteristics such as good sensitivity and short response time. The fabricated devices exhibited a rapid response and recovery, good photo-responsivity, and a high on-to-off photocurrent ratio under visible light illumination with an intensity lower than 0.5 mW/cm2. Full article
(This article belongs to the Special Issue Advanced Materials for Sensing Applications)
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Other

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10 pages, 1045 KiB  
Letter
Fast-Response Colorimetric UVC Sensor Made of a Ga2O3 Photocatalyst with a Hole Scavenger
by Heejoong Ryou, Sunjae Kim, Myunghun Shin, Junsang Cho and Wan Sik Hwang
Sensors 2021, 21(2), 387; https://doi.org/10.3390/s21020387 - 8 Jan 2021
Cited by 6 | Viewed by 2839
Abstract
A fast-response colorimetric ultraviolet-C (UVC) sensor was demonstrated using a gallium oxide (Ga2O3) photocatalyst with small amounts of triethanolamine (TEOA) in methylene blue (MB) solutions and a conventional RGB photodetector. The color of the MB solution changed upon UVC [...] Read more.
A fast-response colorimetric ultraviolet-C (UVC) sensor was demonstrated using a gallium oxide (Ga2O3) photocatalyst with small amounts of triethanolamine (TEOA) in methylene blue (MB) solutions and a conventional RGB photodetector. The color of the MB solution changed upon UVC exposure, which was observed using an in situ RGB photodetector. Thereby, the UVC exposure was numerically quantified as an MB reduction rate with the R value of the photodetector, which was linearly correlated with the measured spectral absorbance using a UV-Vis spectrophotometer. Small amount of TEOA in the MB solution served as a hole scavenger, which resulted in fast MB color changes due to the enhanced charge separation. However, excessive TEOA over 5 wt.% started to block the catalytical active site on the surface of Ga2O3, prohibiting the chemical reaction between the MB molecules and catalytic sites. The proposed colorimetric UVC sensor could monitor the detrimental UVC radiation with high responsivity at a low cost. Full article
(This article belongs to the Special Issue Advanced Materials for Sensing Applications)
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