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Applied Sciences
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Biomimetic Sensors and Actuators
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Biomimetic Sensors and Actuators

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (30 December 2022) | Viewed by 9130

Special Issue Editor

Prof. Dr. Seung-Yop Lee

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Sogang University, Seoul 04107, Korea
Interests: biomimetics; biosensors; smart actuators; biomimetic robots; colorimetric sensors; nano-photonics

Special Issue Information

Dear Colleagues,

This Special Issue is devoted to the new challenging topic of smart sensors and actuators in various research fields. Biomimetics (biomimicry) is an interdisciplinary field in which principles from engineering and biology are applied to the synthesis of materials, synthetic systems, or machines that have functions that mimic biological processes. At present, plant, animal, and insect structures are providing new functional concepts to scientists and engineers for the development of biomimetic sensors and actuators. We are inviting submissions to this Special Issue on Biomimetic Sensors and Actuators. Biomimetic sensors include various bioinspired detections, artificial sensory systems, and responsive materials. Biomimetic actuators deal with various bioinspired actuations and robotics including smart actuators, artificial muscles, and soft actuators. Moreover, the submission of new findings and research on biomimetic design and mechanisms are also welcomed to the Special Issue.

Prof. Dr. Seung-Yop Lee
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. Applied Sciences 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 2400 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

  • biomimetic sensors
  • biomimetic actuators
  • biomimetic robots
  • artificial muscles and soft actuators
  • artificial sensory systems and devices
  • bioinspired responsive materials
  • biomimetic design and mechanisms

Published Papers (3 papers)

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Research

10 pages, 2148 KiB  
Article
The Balance Strategy between Structural Safety and Sensing Accuracy Inspired by Slit-Based Mechanical Sensilla
by Qian Wang, Cheng Fan, Yuecheng Gui, Yao Lu and Kejun Wang
Appl. Sci. 2020, 10(24), 8778; https://doi.org/10.3390/app10248778 - 08 Dec 2020
Cited by 1 | Viewed by 1688
Abstract
In engineering, cracks are typically regarded as defects due to enormous stress amplification at tip of the crack. Conversely, scorpion ingeniously utilizes the “risky” near-tip stress field of a crack-shaped slit to accurately detect weak vibration signal without causing catastrophic crack propagation from [...] Read more.
In engineering, cracks are typically regarded as defects due to enormous stress amplification at tip of the crack. Conversely, scorpion ingeniously utilizes the “risky” near-tip stress field of a crack-shaped slit to accurately detect weak vibration signal without causing catastrophic crack propagation from the slit tip. The present paper focuses on the balance strategy between structural safety and sensing accuracy of slit-based mechanical sensilla. We performed a detailed structural and mechanical property study of tissue around the slit wake utilizing a complementary combination of various experimental methods. The results indicate that there is a special thin surface membrane covering the slit wake and the elastic moduli of the membrane and exoskeleton are 0.562 GPa and 5.829 GPa, respectively. In addition, the ratio of bending stiffness between exoskeleton and membrane tissue is about 8 × 104. The theoretical and simulation analysis show that the surface membrane—with appropriate elastic modulus and bending stiffness—can achieve different forms of deformation with the change of slit width for protecting the mechanosensory structure without sacrificing the sensing accuracy. This finding offers a crucial theoretical basis for the further design of bionic mechanical sensors based on the near-tip stress field of artificial cracks. Full article
(This article belongs to the Special Issue Biomimetic Sensors and Actuators)
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22 pages, 7296 KiB  
Article
High Performance Zinc Oxide Nanorod-Doped Ion Imprinted Polypyrrole for the Selective Electrosensing of Mercury II Ions
by Zouhair Ait-Touchente, Houssem Eddine El Yamine Sakhraoui, Najla Fourati, Chouki Zerrouki, Naima Maouche, Nourdin Yaakoubi, Rachid Touzani and Mohamed M. Chehimi
Appl. Sci. 2020, 10(19), 7010; https://doi.org/10.3390/app10197010 - 08 Oct 2020
Cited by 18 | Viewed by 3324
Abstract
A biomimetic, ion-imprinted polymer (IIP) was prepared by electropolymerization of pyrrole at the surface of gold electrodes decorated with vertically grown ZnO nanorods. The vertical growth of the nanorods was achieved via an ultrathin aryl monolayer grafted by reduction of diazonium salt precursor. [...] Read more.
A biomimetic, ion-imprinted polymer (IIP) was prepared by electropolymerization of pyrrole at the surface of gold electrodes decorated with vertically grown ZnO nanorods. The vertical growth of the nanorods was achieved via an ultrathin aryl monolayer grafted by reduction of diazonium salt precursor. Pyrrole was polymerized in the presence of L-cysteine as chelating agent and Hg2+ (template). Hg2+-imprinted polypyrrole (PPy) was also prepared on a bare gold electrode in order to compare the two methods of sensor design (Au-ZnO-IIP vs. Au-IIP). Non-imprinted PPy was prepared in the same conditions but in the absence of any Hg2+ template. The strategy combining diazonium salt modification and ZnO nanorod decoration of gold electrodes permitted us to increase considerably the specific surface area and thus improve the sensor performance. The limit of detection (LOD) of the designed sensor was ~1 pM, the lowest value ever reported in the literature for gold electrode sensors. The dissociation constants between PPy and Hg2+ were estimated at [Kd1 = (7.89 ± 3.63) mM and Kd2 = (38.10 ± 9.22) pM]. The sensitivity of the designed sensor was found to be 0.692 ± 0.034 μA.pM-1. The Au-ZnO-IIP was found to be highly selective towards Hg2+ compared to cadmium, lead and copper ions. This sensor design strategy could open up new horizons in monitoring toxic heavy metal ions in water and therefore contribute to enhancing environmental quality. Full article
(This article belongs to the Special Issue Biomimetic Sensors and Actuators)
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13 pages, 3669 KiB  
Article
Resonance-Driven Passive Folding/Unfolding Flapping Wing Actuator
by Takashi Ozaki, Norikazu Ohta and Kanae Hamaguchi
Appl. Sci. 2020, 10(11), 3771; https://doi.org/10.3390/app10113771 - 29 May 2020
Cited by 4 | Viewed by 3106
Abstract
The wings of flapping-wing micro aerial vehicles (MAVs) face the risk of breakage. To solve this issue, we propose the use of a biomimetic foldable wing. In this study, a resonant-driven piezoelectric flapping-wing actuator with a passive folding/unfolding mechanism was designed and fabricated, [...] Read more.
The wings of flapping-wing micro aerial vehicles (MAVs) face the risk of breakage. To solve this issue, we propose the use of a biomimetic foldable wing. In this study, a resonant-driven piezoelectric flapping-wing actuator with a passive folding/unfolding mechanism was designed and fabricated, in which the folding/unfolding motion is passively realized by the centrifugal and lift forces due to the stroke motion of the wings. Although the passive folding/unfolding is a known concept, its feasibility and characteristics in combination with a resonant system have not yet been reported. Because the resonant actuation is necessary for extremely small, insect-scale MAVs, research is required to realize such MAVs with a foldable-wing mechanism. Therefore, we first examine and report the performance of the resonant-driven passive folding/unfolding mechanism. We also present a simplified theoretical model demonstrating an interaction between the resonant actuation system and folding/unfolding mechanism. We successfully demonstrate the folding/unfolding motion by the fabricated actuator. In addition, the theoretical model showed good agreement with the experiment. Full article
(This article belongs to the Special Issue Biomimetic Sensors and Actuators)
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