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The State-of-the-Art of Smart Materials Sensors and Actuators
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The State-of-the-Art of Smart Materials 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 (30 August 2023) | Viewed by 4045

Special Issue Editors

Prof. Dr. Seung-Bok Choi

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Guest Editor
Department of Mechanical Engineering, The State University of New York at Korea (SUNY Korea), 119 Songdo Moonhwa-Ro, Yeonsu-Gu, Incheon 21985, Republic of Korea
Interests: magnetorheological (MR) fluid; electrorheological (ER) fluid; control theory; robot control; vibration control; haptic devices using MR/ER fluids; sensors and actuators using smart materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jung Woo Sohn

E-Mail Website
Guest Editor
Department of Mechanical Design Engineering, Kumoh National Institute of Technology, Daehak-ro 61, Gumi 39177, Gyeongbuk, Republic of Korea
Interests: smart material sensor and actuator; smart system and structure; active and semi-active control; vibration control; artificial intelligence; piezoelectric material; shape memory alloy; magnetorheological fluid
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Smart materials are advanced materials that can change the properties of materials in response to various external stimuli such as electric fields, magnetic fields, strain rate, and temperature. These smart materials are widely used as sensors and actuators in various engineering application systems due to their many advantages, such as high energy efficiency, fast response time, and system compactness.

The purpose of this Special Issue is to publish insightful and influential high-level review papers on the application of sensors and actuators using various smart materials. This Special Issue includes various types of review papers, such as chronological reviews, systematic reviews, specific aspect reviews, and application reviews. We expect these papers to be widely read and influential for researchers in related fields and to provide a variety of topics for discussion.

The list of potential research topics includes but is not limited to:

  • Principles of smart materials sensors and actuators;
  • Design, modeling, and control of smart structures and systems;
  • Passive and active vibration and noise control;
  • Soft robotics and aritificial muscles;
  • Medical, haptic, and rehabilitation systems;
  • Structural health monitoring;
  • Flexible and wearable sensors;
  • Energy harvesting systems;
  • Other engineering applications such as aerospace fields.

Prof. Dr. Seung-Bok Choi
Prof. Dr. Jung Woo Sohn
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

  • smart materials
  • smart/intelligent structures/systems
  • electro/magneto-rheological materials
  • shape memory alloys and polymers
  • piezoelectric materials
  • magnetostrictive materials
  • electroactive polymers (EAP)
  • sensors and actuators

Published Papers (2 papers)

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Research

10 pages, 2883 KiB  
Communication
Highly Elastically Deformable Coiled CNT/Polymer Fibers for Wearable Strain Sensors and Stretchable Supercapacitors
by Jin Hyeong Choi, Jun Ho Noh and Changsoon Choi
Sensors 2023, 23(4), 2359; https://doi.org/10.3390/s23042359 - 20 Feb 2023
Cited by 6 | Viewed by 2035
Abstract
Stretchable yarn/fiber electronics with conductive features are optimal components for different wearable devices. This paper presents the construction of coil structure-based carbon nanotube (CNT)/polymer fibers with adjustable piezoresistivity. The composite unit fiber is prepared by wrapping a conductive carbon CNT sheath onto an [...] Read more.
Stretchable yarn/fiber electronics with conductive features are optimal components for different wearable devices. This paper presents the construction of coil structure-based carbon nanotube (CNT)/polymer fibers with adjustable piezoresistivity. The composite unit fiber is prepared by wrapping a conductive carbon CNT sheath onto an elastic spandex core. Owing to the helical coil structure, the resultant CNT/polymer composite fibers are highly stretchable (up to approximately 300%) without a noticeable electrical breakdown. More specifically, based on the difference in the coil index (which is the ratio of the coil diameter to the diameter of the fiber within the coil) according to the polymeric core fiber (spandex or nylon), the composite fiber can be used for two different applications (i.e., as strain sensors or supercapacitors), which are presented in this paper. The coiled CNT/spandex composite fiber sensor responds sensitively to tensile strain. The coiled CNT/nylon composite fiber can be employed as an elastic supercapacitor with excellent capacitance retention at 300% strain. Full article
(This article belongs to the Special Issue The State-of-the-Art of Smart Materials Sensors and Actuators)
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11 pages, 2943 KiB  
Communication
Elastomeric Core/Conductive Sheath Fibers for Tensile and Torsional Strain Sensors
by Jeeeun Kim and Changsoon Choi
Sensors 2022, 22(22), 8934; https://doi.org/10.3390/s22228934 - 18 Nov 2022
Viewed by 1490
Abstract
Motion sensing, aimed at detecting and monitoring mechanical deformation, has received significant attention in various industrial and research fields. In particular, fiber-structured mechanical strain sensors with carbon-based materials have emerged as promising alternatives for wearable applications owing to their wearability and adaptability to [...] Read more.
Motion sensing, aimed at detecting and monitoring mechanical deformation, has received significant attention in various industrial and research fields. In particular, fiber-structured mechanical strain sensors with carbon-based materials have emerged as promising alternatives for wearable applications owing to their wearability and adaptability to the human body. Various materials, structures, sensing mechanisms, and fabrication methods have been used to fabricate high-performance fiber strain sensors. Nevertheless, developing multi-modal strain sensors that can monitor multiple deformations remains to be accomplished. This study established core/sheath fiber multi-modal strain sensors using polymer and carbon nanotubes (CNTs). Specifically, a flexible and conductive CNT sheet was wrapped onto the elastomeric core fiber at a certain angle. This wrapping angle allowed the CNTs to mechanically deform under tensile and torsional deformations without fatal structural damage. The CNTs could sense both tensile and torsional strains through reversible structural changes during deformations. The fiber strain sensor exhibited an increase of 124.9% and 9.6% in the resistance during tensile and torsional deformations of 100% and 1250 rad/m, respectively. Full article
(This article belongs to the Special Issue The State-of-the-Art of Smart Materials Sensors and Actuators)
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