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Micromachines
Special Issues
Self-Powered Devices and Systems
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Self-Powered Devices and Systems

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A：Physics".

Deadline for manuscript submissions: closed (15 March 2023) | Viewed by 3816

Special Issue Editor

Dr. Zhiyi Wu

E-Mail Website
Guest Editor
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
Interests: nanogenerators; self-powered sensors; wearable devices; flexible electronics and sensors; biomedical and implantable devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Sensor networks are essential for the development of the Internet of Things and smart cities. General sensors, and especially mobile sensors, have to be powered by a power unit. Considering the high mobility, wide distribution, and wireless operation of the sensors, their sustainable operation remains a critical challenge due to the limited lifetime of an energy storage unit. The concept of self-powered sensors and systems means harvesting ambient energy for continuously powering a sensor without the use of an external power source, which aims to ensure the sensors can continuously work for a long time and without maintenance. As such, self-powered sensors and systems are the inevitable trends for the future development of sensing technology. Accordingly, this Special Issue seeks to showcase research papers and review articles that focus on novel developments in energy harvesting technology, active sensing technology, battery technology, and so on to promote self-powered sensors and systems into actual applications.

We look forward to receiving your submissions!

Dr. Zhiyi Wu
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. Micromachines 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 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

  • self-powered sensors
  • energy harvesting technology
  • active sensing technology
  • battery technology
  • power management circuits
  • wireless communication
  • low-power electronics

Published Papers (2 papers)

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Research

12 pages, 2388 KiB  
Article
A Vertical Single Transistor Neuron with Core–Shell Dual-Gate for Excitatory–Inhibitory Function and Tunable Firing Threshold Voltage
by Taegoon Lee, Seung-Bae Jeon and Daewon Kim
Micromachines 2022, 13(10), 1740; https://doi.org/10.3390/mi13101740 - 14 Oct 2022
Viewed by 2065
Abstract
A novel inhibitable and firing threshold voltage tunable vertical nanowire (NW) single transistor neuron device with core–shell dual-gate (CSDG) was realized and verified by TCAD simulation. The CSDG NW neuron is enclosed by an independently accessed shell gate and core gate to serve [...] Read more.
A novel inhibitable and firing threshold voltage tunable vertical nanowire (NW) single transistor neuron device with core–shell dual-gate (CSDG) was realized and verified by TCAD simulation. The CSDG NW neuron is enclosed by an independently accessed shell gate and core gate to serve an excitatory–inhibitory transition and a firing threshold voltage adjustment, respectively. By utilizing the shell gate, the firing of specific neuron can be inhibited for winner-takes-all learning. It was confirmed that the independently accessed core gate can be used for adjustment of the firing threshold voltage to compensate random conductance variation before the learning and to fix inference error caused by unwanted synapse conductance change after the learning. This threshold voltage tuning can also be utilized for homeostatic function during the learning process. Furthermore, a myelination function which controls the transmission rate was obtained based on the inherent asymmetry between the source and drain in vertical NW structure. Finally, using the CSDG NW neuron device, a letter recognition test was conducted by SPICE simulation for a system-level validation. This multi-functional neuron device can contribute to construct a high-density monolithic SNN hardware combining with the previously developed vertical synapse MOSFET devices. Full article
(This article belongs to the Special Issue Self-Powered Devices and Systems)
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8 pages, 2543 KiB  
Article
Magnetic Force-Assisted Nonlinear Three-Dimensional Wideband Energy Harvester Using Magnetostrictive/Piezoelectric Composite Transducers
by Zhiming Lin, Hongyun Li, Shaobo Lv, Binbin Zhang, Zhiyi Wu and Jin Yang
Micromachines 2022, 13(10), 1633; https://doi.org/10.3390/mi13101633 - 29 Sep 2022
Cited by 1 | Viewed by 1294
Abstract
This paper presents a nonlinear magnetoelectric energy harvester which has the potential to harvest vibrational energy over a wide bandwidth in arbitrary motion directions. Three springs with equal intersection angles are adopted to absorb the multi-directional vibration energy. Magnetic interaction between the magnets [...] Read more.
This paper presents a nonlinear magnetoelectric energy harvester which has the potential to harvest vibrational energy over a wide bandwidth in arbitrary motion directions. Three springs with equal intersection angles are adopted to absorb the multi-directional vibration energy. Magnetic interaction between the magnets and ME transducers allows the nonlinear motion with enhanced harvesting frequency range. Very good agreement is observed between the numerical and experimental open-circuit voltage output frequency response curves. The experimental results show that the harvester can harvest vibrational energy in an arbitrary direction, exhibiting a further bandwidth of 5.2 Hz. This study provides a new solution to effectively use the magnetoelectric energy harvester for multi-directional and bandwidth vibrational energy scavenging in the surrounding environment. Full article
(This article belongs to the Special Issue Self-Powered Devices and Systems)
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