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Micro/Nano Electromechanical Sensors and Actuators
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Micro/Nano Electromechanical Sensors and Actuators

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

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 4309

Special Issue Editors

Prof. Dr. Norihisa Miki

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Keio University, Kanagawa 223-8522, Japan
Interests: micro/nano engineering and science; human interface; interaction/cognitive science/media art; medical engineering; artificial organ; machine learning; artificial intelligence (AI); MEMS (microelectromechanical systems)
Special Issues, Collections and Topics in MDPI journals
Dr. Jian LU

E-Mail Website
Guest Editor
Device Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Namiki 1-2-1, Tsukuba, Ibaraki, Japan
Interests: MEMS/NEMS; sensors; piezoelectric film; FEM simulations; wireless sensor networks; system integration; micro processes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are planning a Special Issue that will include high-quality papers presented during the 13th Japan–China–Korea Joint Conference on MEMS/NEMS (JCK MEMS/NEMS 2022, https://www.jckmemsnems2022.com/), sponsored by the MDPI open access journal Actuators.

The JCK MEMS/NEMS Conference is organized to provide an annual East Asian forum for presenting recent progress in Green & Life Innovation based on MEMS/NEMS technology, with special emphasis placed on international collaboration toward solving environmental and social issues among East Asian economies. In this Special Issue, selected papers from JCK MEMS/NEMS 2022 will be published with the aim of highlighting the latest achievements in the research on micro-/nanosensors, actuators, and related technologies. Both original research papers (extended from conference proceedings) and review papers that focus on the state-of-the-art in one of the following topics and covered by the journal’s aims and scope will be considered for publication.

  • Micro/nano fabrication, including 3D printing
  • Micro/nano electronics, including flexible electronics
  • Micro/nano sensors and actuators
  • Micro/nano systems
  • Networked microsystems and IoT technologies
  • Materials and device characterization
  • Integration and packaging technologies
  • Modeling and simulation of manufacturing process
  • Other relevant topics that are covered by the journal’s aims and scope

You may choose our Joint Special Issue in Actuators.

Prof. Dr. Norihisa Miki
Dr. Jian Lu
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. 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 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

  • microelectromechanical system
  • nanoelectromechanical system
  • actuators
  • sensors
  • fabrication
  • IoT
  • Green & Life Innovation

Published Papers (3 papers)

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Research

14 pages, 2810 KiB  
Article
Margined Horn-Shaped Air Chamber for Body-Conduction Microphone
by Shun Muramatsu, Yuki Kohata, Emi Hira, Yasuyuki Momoi, Michitaka Yamamoto, Seiichi Takamatsu and Toshihiro Itoh
Sensors 2023, 23(9), 4565; https://doi.org/10.3390/s23094565 - 08 May 2023
Viewed by 1230
Abstract
The sound amplification ratios of sealed air chambers with different shapes were quantitatively compared to design a body-conduction microphone to measure animal scratching sounds. Recently, quantitative monitoring of scratching intensity in dogs has been required. We have already developed a collar with a [...] Read more.
The sound amplification ratios of sealed air chambers with different shapes were quantitatively compared to design a body-conduction microphone to measure animal scratching sounds. Recently, quantitative monitoring of scratching intensity in dogs has been required. We have already developed a collar with a body-conduction microphone to measure body-conducted scratching sounds. However, the air chamber, one of the components of the body-conduction microphone, has not been appropriately designed. This study compared the amplification ratios of air chambers with different shapes through numerical analysis and experiments. According to the results, the horn-shaped air chamber achieved the highest amplification performance, at least for sound frequencies below 3 kHz. The simulated amplification ratio of the horn-shaped air chamber with a 1 mm height and a 15 mm diameter was 52.5 dB. The deformation of the bottom of the air chamber affected the amplification ratio. Adjusting the margin of the margined horn shape could maintain its amplification ratio at any pressing force. The simulated and experimental amplification ratios of the margined horn-shaped air chamber were 53.4 dB and 19.4 dB, respectively. Full article
(This article belongs to the Special Issue Micro/Nano Electromechanical Sensors and Actuators)
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12 pages, 7369 KiB  
Article
Rapid Manufacturing Approach of an Ultrathin Moisture Sensor for Health Monitoring
by Lan Zhang, Jian Lu, En Takashi and Sohei Matsumoto
Sensors 2023, 23(9), 4262; https://doi.org/10.3390/s23094262 - 25 Apr 2023
Viewed by 1301
Abstract
This study developed a rapid manufacturing approach for a moisture sensor based on contactless jet printing technology. A compact measurement system with ultrathin and flexure sensor electrodes was fabricated. The proposed sensor system focuses on continuous urine measurement, which can provide timely information [...] Read more.
This study developed a rapid manufacturing approach for a moisture sensor based on contactless jet printing technology. A compact measurement system with ultrathin and flexure sensor electrodes was fabricated. The proposed sensor system focuses on continuous urine measurement, which can provide timely information on subjects to ensure efficient diagnosis and treatment. The obtained results verify that the proposed sensor system can exhibit a typical responsivity of up to −7.76 mV/%RH in the high-sensitivity range of 50–80 %RH. A preliminary field experiment was conducted on a hairless rat, and the effectiveness of the proposed ultrathin moisture sensor was verified. This ultrathin sensor electrode can be fabricated in the micrometer range, and its application does not affect the comfort of the user. The ultrathin electrode sensors can be printed directly on the diaper or undergarment of the user for in situ urine health monitoring, particularly of infants and the elderly. Full article
(This article belongs to the Special Issue Micro/Nano Electromechanical Sensors and Actuators)
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12 pages, 9219 KiB  
Article
Comparative Studies on Electrodes for Rumen Bacteria Microbial Fuel Cells
by Yusuke Yashiro, Michitaka Yamamoto, Yoshihiro Muneta, Hiroshi Sawada, Reina Nishiura, Shozo Arai, Seiichi Takamatsu and Toshihiro Itoh
Sensors 2023, 23(8), 4162; https://doi.org/10.3390/s23084162 - 21 Apr 2023
Viewed by 1391
Abstract
Microbial fuel cells (MFCs) using rumen bacteria have been proposed as a power source for running devices inside cattle. In this study, we explored the key parameters of the conventional bamboo charcoal electrode in an attempt to improve the amount of electrical power [...] Read more.
Microbial fuel cells (MFCs) using rumen bacteria have been proposed as a power source for running devices inside cattle. In this study, we explored the key parameters of the conventional bamboo charcoal electrode in an attempt to improve the amount of electrical power generated by the microbial fuel cell. We evaluated the effects of the electrode’s surface area, thickness, and rumen content on power generation and determined that only the electrode’s surface area affects power generation levels. Furthermore, our observations and bacterial count on the electrode revealed that rumen bacteria concentrated on the surface of the bamboo charcoal electrode and did not penetrate the interior, explaining why only the electrode’s surface area affected power generation levels. A Copper (Cu) plate and Cu paper electrodes were also used to evaluate the effect of different electrodes on measuring the rumen bacteria MFC’s power potential, which had a temporarily higher maximum power point (MPP) compared to the bamboo charcoal electrode. However, the open circuit voltage and MPP decreased significantly over time due to the corrosion of the Cu electrodes. The MPP for the Cu plate electrode was 775 mW/m2 and the MPP for the Cu paper electrode was 1240 mW/m2, while the MPP for bamboo charcoal electrodes was only 18.7 mW/m2. In the future, rumen bacteria MFCs are expected to be used as the power supply of rumen sensors. Full article
(This article belongs to the Special Issue Micro/Nano Electromechanical Sensors and Actuators)
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