Solid-State Sensors, Actuators and Microsystems—Transducers 2025

A special issue of Micromachines (ISSN 2072-666X).

Deadline for manuscript submissions: 30 June 2026 | Viewed by 2502

Special Issue Editors


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Guest Editor
Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
Interests: MEMS fabrication; microsensors and microactuators; microfluidic devices
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Guest Editor
Department of Electrical Engineering, University of South Florida, 4202 East Fowler Avenue, ENB118, Tampa, FL 33620, USA
Interests: advanced manufacturing; MEMS/NEMS transducers; nanomaterials and nanotechnology; microfluidics and biosensors; RF/microwave electronics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue, “Solid-State Sensors, Actuators and Microsystems—Transducers 2025”, will publish expanded conference proceedings from the Transducers 2025 conference, held on 29 July to 3 August in Orlando, Florida, USA.

The topic of focus is “Transducers for a Small World”. We welcome technological and scientific contributions in electrical, mechanical, optical, magnetic, thermal, and biological sensors, actuators, and systems that use micro- and nanotechnology. Contributions on major areas of activity in the development of novel sensors, actuators, and transducers focus on, but are not limited to, the following:

  • Microscale and nanoscale materials, fabrication processes, and packaging technologies;
  • Nanoscale materials, devices, and systems;
  • Transducers with soft, flexible, or composite materials;
  • Mechanical/physical transducers and microsystems;
  • RF MEMS, resonators, and oscillators;
  • Biological transducers and microsystems;
  • Microfluidic platform technologies;
  • Medical microscale transducers and microsystems;
  • Chemical and environmental transducers and microsystems;
  • Energy, power, and thermal transducers and microsystems;
  • Acoustic transducers and microsystems;
  • Optical and atomic transducers and microsystems;
  • Actuators and microsystems.

Expanded and high-quality conference papers can be considered as articles if they fulfill the following requirements: (1) the paper should be expanded to the size of a research article; (2) the conference paper should be cited and noted on the first page of the paper; (3) if the authors do not hold the copyright of the published conference paper, authors should seek the appropriate permission from the copyright holder; (4) authors are asked to disclose that it is conference paper in their cover letter and include a statement on what has been changed compared to the original conference paper.

As the Transducers conference is a leading event in the field, we encourage all participants to submit their papers to this Special Issue.

Prof. Dr. Hyoung Jin Cho
Prof. Dr. Ha Duong Ngo
Prof. Dr. Jing Wang
Guest Editors

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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 2100 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

  • microscale and nanoscale materials and fabrication
  • soft, flexible and stretchable materials and electronics
  • MEMS, sensors and microsystem
  • resonators, actuators and transducers
  • microfluidic platform technologies

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Published Papers (2 papers)

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Research

16 pages, 7238 KB  
Article
Design and Fabrication of High-Frequency Resonant Micro-Accelerometer Based on Piezoelectric Stiffening Effect
by Ankesh Todi, Hakhamanesh Mansoorzare and Reza Abdolvand
Micromachines 2026, 17(4), 483; https://doi.org/10.3390/mi17040483 - 16 Apr 2026
Viewed by 449
Abstract
In this work, a novel approach for implementing a resonant micro-accelerometer is demonstrated that may extend the operating frequency of such devices to several tens of MHz, which may enable direct wireless signal transfer. The proposed resonant accelerometer consists of a hybrid structure: [...] Read more.
In this work, a novel approach for implementing a resonant micro-accelerometer is demonstrated that may extend the operating frequency of such devices to several tens of MHz, which may enable direct wireless signal transfer. The proposed resonant accelerometer consists of a hybrid structure: a piezoelectric micro-resonator and a capacitive mass-spring (CMS) system (that are mechanically separated but electrically interconnected). The sensor utilizes the piezoelectric stiffening mechanism, which translates the acceleration-induced displacement of the capacitive mass-spring (CMS) structure into a shift in the resonance frequency of the interconnected resonator. The operating principle is elaborated upon in detail, supported by simulation and experimental results. Additionally, a novel fabrication technique is presented to realize a suspended fixed bi-layer electrode for the CMS in which a hardened layer of photoresist is utilized as a sacrificial layer. The experimental sensitivity of a fully functional device is reported to be ~6 Hz/g at 25 MHz (~0.23 ppm/g), which closely matches the simulated sensitivity of ~7 Hz/g (~0.278 ppm/g) for the fabricated capacitive gap of ~7 µm. Full article
(This article belongs to the Special Issue Solid-State Sensors, Actuators and Microsystems—Transducers 2025)
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14 pages, 3436 KB  
Article
A Battery-Free, Data-Informed UV Dose Sensor Made of Laser-Induced Graphene and Bio-Derived Electrolytes
by Mohammadreza Chimerad, Pouya Borjian, Faisal Bin Kashem, Swaminathan Rajaraman and Hyoung J. Cho
Micromachines 2026, 17(3), 302; https://doi.org/10.3390/mi17030302 - 28 Feb 2026
Viewed by 1402
Abstract
This study presents a sustainable, battery-free UV (ultraviolet) dose sensor designed for intelligent food packaging applications. The device integrates laser-induced graphene (LIG) electrodes, a ZnO-CNT (carbon nanotube) UV-active composite, and a bio-derived ionochromic cell composed of blueberry anthocyanins and a NaCl electrolyte. This [...] Read more.
This study presents a sustainable, battery-free UV (ultraviolet) dose sensor designed for intelligent food packaging applications. The device integrates laser-induced graphene (LIG) electrodes, a ZnO-CNT (carbon nanotube) UV-active composite, and a bio-derived ionochromic cell composed of blueberry anthocyanins and a NaCl electrolyte. This work advances the platform by introducing a quantitative and predictive dose–color mapping framework for cumulative UV detection under zero-bias operation. A controlled charge-injection protocol was employed to emulate UV-generated photocurrent, enabling systematic investigation of charge-transfer-driven ionochromic kinetics across five current levels (0.2–3 mA). HSB (hue–saturation–brightness)-based colorimetric analysis was performed to quantify the time-dependent chromatic evolution, and a numerical fitting model was developed to map charge accumulation to color shifts. Using this calibration, the color response at microampere-level photocurrents—corresponding to real zero-bias UV operation—can be predicted. The resulting model enables estimation of the cumulative time required for the ionochromic cell to transition from red to purple under realistic UV intensities. By combining self-powered sensing with predictive colorimetric modeling, this work significantly enhances the functionality of battery-free UV indicators, enabling quantitative dose measurement without external electronics for safer food-supply-chain monitoring. Full article
(This article belongs to the Special Issue Solid-State Sensors, Actuators and Microsystems—Transducers 2025)
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