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Dutta A, Niu Z, Abdullah AM, Tiwari N, Biswas MAS, Li B, Lorestani F, Jing Y, Cheng H, Zhang S. Closely Packed Stretchable Ultrasound Array Fabricated with Surface Charge Engineering for Contactless Gesture and Materials Detection. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2303403. [PMID: 38348559 PMCID: PMC11022739 DOI: 10.1002/advs.202303403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 01/14/2024] [Indexed: 03/20/2024]
Abstract
Communication with hand gestures plays a significant role in human-computer interaction by providing an intuitive and natural way for humans to communicate with machines. Ultrasound-based devices have shown promising results in contactless hand gesture recognition without requiring physical contact. However, it is challenging to fabricate a densely packed wearable ultrasound array. Here, a stretchable ultrasound array is demonstrated with closely packed transducer elements fabricated using surface charge engineering between pre-charged 1-3 Lead Zirconate Titanate (PZT) composite and thin polyimide film without using a microscope. The array exhibits excellent ultrasound properties with a wide bandwidth (≈57.1%) and high electromechanical coefficient (≈0.75). The ultrasound array can decipher gestures up to 10 cm in distance by using a contactless triboelectric module and identify materials from the time constant of the exponentially decaying impedance based on their triboelectric properties by utilizing the electrostatic induction phase. The newly proposed metric of the areal-time constant is material-specific and decreases monotonically from a highly positive human body (1.13 m2 s) to negatively charged polydimethylsiloxane (PDMS) (0.02 m2 s) in the triboelectric series. The capability of the closely packed ultrasound array to detect material along with hand gesture interpretation provides an additional dimension in the next-generation human-robot interaction.
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Affiliation(s)
- Ankan Dutta
- Department of Engineering Science and MechanicsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
- Center for Neural EngineeringThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
| | - Zhenyuan Niu
- Department of Engineering Science and MechanicsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
| | - Abu Musa Abdullah
- Department of Engineering Science and MechanicsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
| | - Naveen Tiwari
- Department of Engineering Science and MechanicsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
- Center for Research in Biological Chemistry and Molecular Materials (CiQUS)University of Santiago de CompostelaSantiago de Compostela15705Spain
| | - Md Abu Sayeed Biswas
- Department of Engineering Science and MechanicsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
| | - Bowen Li
- Department of Engineering Science and MechanicsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
| | - Farnaz Lorestani
- Department of Engineering Science and MechanicsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
| | - Yun Jing
- Graduate Program in AcousticsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
| | - Huanyu Cheng
- Department of Engineering Science and MechanicsThe Pennsylvania State UniversityUniversity ParkState CollegePA16802USA
| | - Senhao Zhang
- Suzhou Institute of Biomedical Engineering and TechnologyUniversity of Science and Technology of ChinaSchool of Biomedical Engineering165085, 88 Keling Rd, Huqiu DistrictSuzhouJiangsu215163China
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Chang CY, Yang JR, Liu YS, Panda A. Facile surface functionalization of triboelectric layers via electrostatically self-assembled zwitterionic molecules for achieving efficient and stable antibacterial flexible triboelectric nanogenerators. MATERIALS HORIZONS 2024; 11:646-660. [PMID: 38063132 DOI: 10.1039/d3mh01529g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Manipulation of the surface properties of the triboelectric layer has been proven to be one of the key parameters to achieve high-performance and stable triboelectric nanogenerators (TENG). Herein, a pragmatic surface engineering strategy that can substantially boost the performance and stability of flexible TENG is elaborated by incorporating the zwitterionic molecule dimethylethylammoniumpropane sulfonate (NDSB) as the surface modification layer. Given that zwitterionic molecules tend to form aggregated structures, realizing ordered arrangement on the substrate surface remains challenging to date. To address this issue, in this work, a combination of multiple surface treatments and molecular manipulation strategy is proposed. Our results prove that NDSB is effective in modifying the surface properties of the dielectric layer and electrode layer, leading to a remarkable power density and specific power of 2.86 W m-2 and 20.73 mW g-1 for flexible TENG, respectively. In addition, due to the strong interaction between the NDSB/dielectric and NDSB/electrode, a water-resistant long-term stable flexible TENG is realized. More encouragingly, our strategy is compatible with a cost-effective dip-coating technique, and an unprecedented demonstration of batch fabrication of TENG using NDSB to functionalize the surface of the dielectric layer and electrode layer synchronously can be realized, which is advantageous for rapid and up-scalable manufacturing of TENG. We also prove that the TENG based on zwitterionic materials reveals exceptional antibacterial properties against Escherichia coli. This study represents an important step towards the development of long-term stable flexible TENG that possesses a high output performance and excellent antibacterial activity based on a facile and economical strategy, enabling TENG technology to show bright prospects in a wide variety of application domains.
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Affiliation(s)
- Chih-Yu Chang
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan (R.O.C.).
| | - Jia-Ruei Yang
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan (R.O.C.).
| | - Yi-Shan Liu
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan (R.O.C.).
| | - Abhisek Panda
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan (R.O.C.).
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Pereira AT, Rodrigues CRS, Silva AC, Vidal R, Ventura JO, Gonçalves IC, Pereira AM. Tailoring the Electron Trapping Effect of a Biocompatible Triboelectric Hydrogel by Graphene Oxide Incorporation towards Self-Powered Medical Electronics. ACS Biomater Sci Eng 2023. [PMID: 37256830 DOI: 10.1021/acsbiomaterials.2c01513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Triboelectric nanogenerators (TENGs) are associated with several drawbacks that limit their application in the biomedical field, including toxicity, thrombogenicity, and poor performance in the presence of fluids. By proposing the use of a hemo/biocompatible hydrogel, poly(2-hydroxyethyl methacrylate) (pHEMA), this study bypasses these barriers. In contact-separation mode, using polytetrafluoroethylene (PTFE) as a reference, pHEMA generates an output of 100.0 V, under an open circuit, 4.7 μA, and 0.68 W/m2 for an internal resistance of 10 MΩ. Our findings unveil that graphene oxide (GO) can be used to tune pHEMA's triboelectric properties in a concentration-dependent manner. At the lowest measured concentration (0.2% GO), the generated outputs increase to 194.5 V, 5.3 μA, and 1.28 W/m2 due to the observed increase in pHEMA's surface roughness, which expands the contact area. Triboelectric performance starts to decrease as GO concentration increases, plateauing at 11% volumetric, where the output is 51 V, 1.76 μA, and 0.17 W/m2 less than pHEMA's. Increases in internal resistance, from 14 ΩM to greater than 470 ΩM, ζ-potential, from -7.3 to -0.4 mV, and open-circuit characteristic charge decay periods, from 90 to 120 ms, are all observed in conjunction with this phenomenon, which points to GO function as an electron trapping site in pHEMA's matrix. All of the composites can charge a 10 μF capacitor in 200 s, producing a voltage between 0.25 and 3.5 V and allowing the operation of at least 20 LEDs. The triboelectric output was largely steady throughout the 3.33 h durability test. Voltage decreases by 38% due to contact-separation frequency, whereas current increases by 77%. In terms of pressure, it appears to have little effect on voltage but boosts current output by 42%. Finally, pHEMA and pHEMA/GO extracts were cytocompatible toward fibroblasts. According to these results, pHEMA has a significant potential to function as a biomaterial to create bio/hemocompatible TENGs and GO to precisely control its triboelectric outputs.
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Affiliation(s)
- Andreia T Pereira
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
| | - Cátia R S Rodrigues
- IFIMUP - Instituto de Fisica de Materiais Avançados, Nanotecnologias e Fotónica, Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Ana C Silva
- IFIMUP - Instituto de Fisica de Materiais Avançados, Nanotecnologias e Fotónica, Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Ricardo Vidal
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
| | - João O Ventura
- IFIMUP - Instituto de Fisica de Materiais Avançados, Nanotecnologias e Fotónica, Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Inês C Gonçalves
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
| | - André M Pereira
- IFIMUP - Instituto de Fisica de Materiais Avançados, Nanotecnologias e Fotónica, Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
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Cha S, Cho Y, Kim JG, Choi H, Ahn D, Sun J, Kang DS, Pak C, Park JJ. Controllable Triboelectric Series Using Gradient Positive and Negative Charge-Confinement Layer with Different Particle Sizes of Mesoporous Carbon Materials. SMALL METHODS 2022; 6:e2101545. [PMID: 35332708 DOI: 10.1002/smtd.202101545] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/12/2022] [Indexed: 06/14/2023]
Abstract
As a method to maximize the energy efficiency of triboelectric nanogenerators (TENGs), high-voltage charge injection (HVCI) on the surface is a simple and effective method for increasing surface charge densities. In this study, positive and negative triboelectric series are controlled using a 3-layer gradient charge-confinement wherein the particle sizes of the mesoporous carbon spheres (mCSs) are sequentially arranged depending on the external surface area of the mCSs. In the gradient charge-confinement layers of this study, the mCS with different sizes perform charge transport from the surface to a deep position during HVCI while mitigating the charge loss through charge confinement to induce the high space charge densities. Through this process, the output voltage-which is initially 15.2 V-is measured to be 600 V after HVCI, thus representing an increase of about 40 times. Further, to amplify the low output current, which is a disadvantage of triboelectric energy, two types of electrical energy-triboelectric and electromagnetic energy-are produced in single mechanical motion. As a result, the output current produced by the cylindrical TENG and electromagnetic generator is recorded as being 1300 times higher, increasing from 12.8 µA to 17.5 mA.
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Affiliation(s)
- Seokjun Cha
- Department of Polymer Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Yujang Cho
- Department of Polymer Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Jong Gyeong Kim
- Graduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Hyeongsub Choi
- Department of Polymer Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Dahye Ahn
- Department of Polymer Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Jingzhe Sun
- Department of Polymer Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Dong-Soo Kang
- Department of Polymer Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Chanho Pak
- Graduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Jong-Jin Park
- Department of Polymer Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
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