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Hu X, Ma Z, Zhao F, Guo S. Recent Advances in Self-Powered Wearable Flexible Sensors for Human Gaits Analysis. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1173. [PMID: 39057851 PMCID: PMC11279839 DOI: 10.3390/nano14141173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 07/05/2024] [Accepted: 07/08/2024] [Indexed: 07/28/2024]
Abstract
The rapid progress of flexible electronics has met the growing need for detecting human movement information in exoskeleton auxiliary equipment. This study provides a review of recent advancements in the design and fabrication of flexible electronics used for human motion detection. Firstly, a comprehensive introduction is provided on various self-powered wearable flexible sensors employed in detecting human movement information. Subsequently, the algorithms utilized to provide feedback on human movement are presented, followed by a thorough discussion of their methods and effectiveness. Finally, the review concludes with perspectives on the current challenges and opportunities in implementing self-powered wearable flexible sensors in exoskeleton technology.
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Affiliation(s)
- Xiaohe Hu
- School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; (X.H.); (F.Z.)
| | - Zhiqiang Ma
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong 999077, China
| | - Fuqun Zhao
- School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; (X.H.); (F.Z.)
| | - Sheng Guo
- School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; (X.H.); (F.Z.)
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2
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Nain A, Chakraborty S, Barman SR, Gavit P, Indrakumar S, Agrawal A, Lin ZH, Chatterjee K. Progress in the development of piezoelectric biomaterials for tissue remodeling. Biomaterials 2024; 307:122528. [PMID: 38522326 DOI: 10.1016/j.biomaterials.2024.122528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/15/2024] [Accepted: 03/08/2024] [Indexed: 03/26/2024]
Abstract
Piezoelectric biomaterials have demonstrated significant potential in the past few decades to heal damaged tissue and restore cellular functionalities. Herein, we discuss the role of bioelectricity in tissue remodeling and explore ways to mimic such tissue-like properties in synthetic biomaterials. In the past decade, biomedical engineers have adopted emerging functional biomaterials-based tissue engineering approaches using innovative bioelectronic stimulation protocols based on dynamic stimuli to direct cellular activation, proliferation, and differentiation on engineered biomaterial constructs. The primary focus of this review is to discuss the concepts of piezoelectric energy harvesting, piezoelectric materials, and their application in soft (skin and neural) and hard (dental and bone) tissue regeneration. While discussing the prospective applications as an engineered tissue, an important distinction has been made between piezoceramics, piezopolymers, and their composites. The superiority of piezopolymers over piezoceramics to circumvent issues such as stiffness mismatch, biocompatibility, and biodegradability are highlighted. We aim to provide a comprehensive review of the field and identify opportunities for the future to develop clinically relevant and state-of-the-art biomaterials for personalized and remote health care.
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Affiliation(s)
- Amit Nain
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India.
| | - Srishti Chakraborty
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Snigdha Roy Barman
- Department of Bioengineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Pratik Gavit
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India; School of Bio Science and Technology, Vellore Institute of Technology, Vellore, 632014, India
| | - Sushma Indrakumar
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Akhilesh Agrawal
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Zong-Hong Lin
- Department of Biomedical Engineering, National Taiwan University, Taipe, 10617, Taiwan.
| | - Kaushik Chatterjee
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India; Department of Bioengineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India.
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3
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Wang F, Wang S, Liu Y, Hou T, Wu Z, Qian J, Zhao Z, Wang L, Jia C, Ma S. Improved Electrical Output Performance of Cellulose-Based Triboelectric Nanogenerators Enabled by Negative Triboelectric Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308195. [PMID: 38072819 DOI: 10.1002/smll.202308195] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/08/2023] [Indexed: 05/12/2024]
Abstract
Cellulose-based triboelectric nanogenerators (TENGs) have attracted widespread attention due to the low cost and environmentally friendly characteristics of cellulose. However, achieving high electrical energy output from these generators still presents significant challenges. Here, cellulose is dissolved-regenerated to form a composite aerogel with high specific surface area, in which cellulose-based composites with excellent negative triboelectric properties are developed by coupling the rich 3D network structure of the regenerated cellulose aerogel, modified barium titanate, and poly(vinylidene fluoride). The TENGs assembled from the composite materials exhibit an output voltage of 1040 V and a current of 1.165 mA at an external force of 8 N and a frequency of 4 Hz, outperforming all cellulose-based negative triboelectric materials. In addition, the nanogenerators have a stable electrical energy output capacity, with no significant property degradation in 100 000 contact-separation tests. The excellent electrical output property of the composite materials enables them to harvest energy from human movement and waterdrops, demonstrating their great application prospects in wearable devices, energy harvesting devices, self-powered sensors, and other fields.
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Affiliation(s)
- Feijie Wang
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, China
| | - Suyang Wang
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, China
| | - Yifan Liu
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, China
| | - Tianmeng Hou
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, China
| | - Zhen Wu
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, China
| | - Jing Qian
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, China
| | - Zhicheng Zhao
- College of Textile Science and Engineering, Jiangnan University, Wuxi, 214122, China
| | - Liqiang Wang
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, China
| | - Chao Jia
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Shufeng Ma
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
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4
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Gu L, Wang Y, Yang M, Xu H, Zhang W, Ren Z, Meng L, Cui N, Liu J. Hierarchical Wrinkles with Piezopotential Enhanced Surface Tribopolarity for High-Performance Self-Powered Pressure Sensor. ACS APPLIED MATERIALS & INTERFACES 2024; 16:3901-3910. [PMID: 38206311 DOI: 10.1021/acsami.3c16415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
Achieving both high sensitivity and wide detecting range is significant for the applications of triboelectric nanogenerator-based self-powered pressure sensors (TPSs). However, most of the previous designs with high sensitivity usually struggle in a narrow pressure detection range (<30 kPa) while expanding the detection range normally sacrifices the sensitivity. To overcome this well-known obstacle, herein, piezopotential enhanced triboelectric effect realized by a rationally designed PDMS/ZnO NWs hierarchical wrinkle structure was exploited to develop a TPS (PETPS) with both high sensitivity and wide detecting range. In this PETPS design, the piezopotential derived from the deformation of ZnO NWs enhances its tribo-charge transferring ability; meanwhile, the hierarchical structure helps to establish a dynamically self-adjustable contact area. Benefiting from these advantages, the PETPS simultaneously achieves high sensitivity (0.26 nC cm-2 kPa-1 from 1 to 25 kPa, and 0.02 nC cm-2 kPa-1 from 25 to 476 kPa), fast response (46 ms), wide sensing range (1 to 476 kPa), and good stability (over 4000 cycles). In addition, the output charge density that is independent of the speed rate of driven force was adopted as the sensing signal of PETPS to replace the commonly used peak voltage/current values, enabling it more adaptive to accurately detect pressure variation in real applications.
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Affiliation(s)
- Long Gu
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710071, China
| | - Yuxin Wang
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710071, China
| | - Maosen Yang
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710071, China
| | - Hang Xu
- Research Center for Humanoid Sensing, Zhejiang Lab, Hangzhou 311100, China
| | - Weiqiang Zhang
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710071, China
| | - Zewei Ren
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710071, China
| | - Leixin Meng
- Research Center for Humanoid Sensing, Zhejiang Lab, Hangzhou 311100, China
| | - Nuanyang Cui
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710071, China
| | - Jinmei Liu
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710071, China
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5
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Bhadwal N, Ben Mrad R, Behdinan K. Review of Piezoelectric Properties and Power Output of PVDF and Copolymer-Based Piezoelectric Nanogenerators. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3170. [PMID: 38133067 PMCID: PMC10745407 DOI: 10.3390/nano13243170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/11/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023]
Abstract
The highest energy conversion efficiencies are typically shown by lead-containing piezoelectric materials, but the harmful environmental impacts of lead and its toxicity limit future use. At the bulk scale, lead-based piezoelectric materials have significantly higher piezoelectric properties when compared to lead-free piezoelectric materials. However, at the nanoscale, the piezoelectric properties of lead-free piezoelectric material can be significantly larger than the bulk scale. The piezoelectric properties of Poly(vinylidene fluoride) (PVDF) and Poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) lead-free piezoelectric nanomaterials are reviewed and their suitability for use in piezoelectric nanogenerators (PENGs) is determined. The impact of different PVDF/PVDF-TrFE composite structures on power output is explained. Strategies to improve the power output are given. Overall, this review finds that PVDF/PVDF-TrFE can have significantly increased piezoelectric properties at the nanoscale. However, these values are still lower than lead-free ceramics at the nanoscale. If the sole goal in developing a lead-free PENG is to maximize output power, lead-free ceramics at the nanoscale should be considered. However, lead-free ceramics are brittle, and thus encapsulation of lead-free ceramics in PVDF is a way to increase the flexibility of these PENGs. PVDF/PVDF-TrFE offers the advantage of being nontoxic and biocompatible, which is useful for many applications.
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Affiliation(s)
| | - Ridha Ben Mrad
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada; (N.B.); (K.B.)
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6
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Liu J, Liu J, Zhang X, Liu X, Zhang C. Customizing Three-Dimensional Elastic Barium Titanate Sponge for Intelligent Piezoelectric Sensing. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37908068 DOI: 10.1021/acsami.3c12921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Piezoelectric energy harvesters (PEHs) with porous structures, such as piezoelectric elastic sponges, exhibit high force-to-electricity conversion efficiencies owing to their excellent compression recovery properties. However, conventional preparation methods are limited to producing bulk-form sponge-like PEHs and fail to create more elaborate three-dimensional (3D) structures that could enhance conversion efficiency. Herein, we invent a composite ink consisting of waterborne polyurethane (WPU), barium titanate (BTO), and cellulose nanofibers (CNFs) that is suitable for direct ink writing (DIW) 3D printing. This ink, when coupled with freeze-drying, allows the customization of piezoelectric sponges with functional 3D structures. The printed lattice sponge exhibits remarkable compression recovery of 70% and a notably high relative sensitivity of 9.83 mV/kPa*wt % (where *wt % denotes the BTO content) across a wide pressure range of 2.98-37 kPa, which is approximately three times broader than those of other composite piezoelectric pressure sensors based on BTO or piezoceramic (PZT) materials. Furthermore, a customized 3D piezoelectric sponge with a "boomerang" configuration is utilized as an anisotropic bending sensor on the wrist for intelligently monitoring the stroke posture and programming scientific training for table tennis players. This study highlights a versatile strategy for constructing elastic sponges with high piezoelectricity and designing 3D PEH functional structures that can be applied to flexible self-powered intelligent sensing systems.
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Affiliation(s)
- Jingfeng Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Jintao Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Xuan Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Xingang Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Chuhong Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
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7
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Muthusamy L, Uppalapati B, Azad S, Bava M, Koley G. Self-Polarized P(VDF-TrFE)/Carbon Black Composite Piezoelectric Thin Film. Polymers (Basel) 2023; 15:4131. [PMID: 37896374 PMCID: PMC10610547 DOI: 10.3390/polym15204131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Self-polarized energy harvesting materials have seen increasing research interest in recent years owing to their simple fabrication method and versatile application potential. In this study, we systematically investigated self-polarized P(VDF-TrFE)/carbon black (CB) composite thin films synthesized on flexible substrates, with the CB content varying from 0 to 0.6 wt.% in P(VDF-TrFE). The presence of -OH functional groups on carbon black significantly enhances its crystallinity, dipolar orientation, and piezoelectric performance. Multiple characterization techniques were used to investigate the crystalline quality, chemical structure, and morphology of the composite P(VDF-TrFE)/CB films, which indicated no significant changes in these parameters. However, some increase in surface roughness was observed when the CB content increased. With the application of an external force, the piezoelectrically generated voltage was found to systematically increase with higher CB content, reaching a maximum value at 0.6 wt.%, after which the sample exhibited low resistance. The piezoelectric voltage produced by the unpoled 0.6 wt.% CB composite film significantly exceeded the unpoled pure P(VDF-TrFE) film when subjected to the same applied strain. Furthermore, it exhibited exceptional stability in the piezoelectric voltage over time, exceeding the output voltage of the poled pure P(VDF-TrFE) film. Notably, P(VDF_TrFE)/CB composite-based devices can be used in energy harvesting and piezoelectric strain sensing to monitor human motions, which has the potential to positively impact the field of smart wearable devices.
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Affiliation(s)
- Lavanya Muthusamy
- Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA; (B.U.); (S.A.); (G.K.)
| | - Balaadithya Uppalapati
- Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA; (B.U.); (S.A.); (G.K.)
| | - Samee Azad
- Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA; (B.U.); (S.A.); (G.K.)
| | - Manav Bava
- Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA;
| | - Goutam Koley
- Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA; (B.U.); (S.A.); (G.K.)
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8
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Costa CM, Cardoso VF, Martins P, Correia DM, Gonçalves R, Costa P, Correia V, Ribeiro C, Fernandes MM, Martins PM, Lanceros-Méndez S. Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications. Chem Rev 2023; 123:11392-11487. [PMID: 37729110 PMCID: PMC10571047 DOI: 10.1021/acs.chemrev.3c00196] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Indexed: 09/22/2023]
Abstract
From scientific and technological points of view, poly(vinylidene fluoride), PVDF, is one of the most exciting polymers due to its overall physicochemical characteristics. This polymer can crystalize into five crystalline phases and can be processed in the form of films, fibers, membranes, and specific microstructures, being the physical properties controllable over a wide range through appropriate chemical modifications. Moreover, PVDF-based materials are characterized by excellent chemical, mechanical, thermal, and radiation resistance, and for their outstanding electroactive properties, including high dielectric, piezoelectric, pyroelectric, and ferroelectric response, being the best among polymer systems and thus noteworthy for an increasing number of technologies. This review summarizes and critically discusses the latest advances in PVDF and its copolymers, composites, and blends, including their main characteristics and processability, together with their tailorability and implementation in areas including sensors, actuators, energy harvesting and storage devices, environmental membranes, microfluidic, tissue engineering, and antimicrobial applications. The main conclusions, challenges and future trends concerning materials and application areas are also presented.
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Affiliation(s)
- Carlos M. Costa
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, 4710-057 Braga, Portugal
- Laboratory
of Physics for Materials and Emergent Technologies, LapMET, University of Minho, 4710-057 Braga, Portugal
- Institute
of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, 4710-057 Braga, Portugal
| | - Vanessa F. Cardoso
- CMEMS-UMinho, University of
Minho, DEI, Campus de
Azurém, 4800-058 Guimarães, Portugal
- LABBELS-Associate
Laboratory, Campus de
Gualtar, 4800-058 Braga, Guimarães, Portugal
| | - Pedro Martins
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, 4710-057 Braga, Portugal
- Laboratory
of Physics for Materials and Emergent Technologies, LapMET, University of Minho, 4710-057 Braga, Portugal
- Institute
of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, 4710-057 Braga, Portugal
| | | | - Renato Gonçalves
- Center of
Chemistry, University of Minho, 4710-057 Braga, Portugal
| | - Pedro Costa
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, 4710-057 Braga, Portugal
- Laboratory
of Physics for Materials and Emergent Technologies, LapMET, University of Minho, 4710-057 Braga, Portugal
- Institute
for Polymers and Composites IPC, University
of Minho, 4804-533 Guimarães, Portugal
| | - Vitor Correia
- CMEMS-UMinho, University of
Minho, DEI, Campus de
Azurém, 4800-058 Guimarães, Portugal
- LABBELS-Associate
Laboratory, Campus de
Gualtar, 4800-058 Braga, Guimarães, Portugal
| | - Clarisse Ribeiro
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, 4710-057 Braga, Portugal
- Laboratory
of Physics for Materials and Emergent Technologies, LapMET, University of Minho, 4710-057 Braga, Portugal
| | - Margarida M. Fernandes
- CMEMS-UMinho, University of
Minho, DEI, Campus de
Azurém, 4800-058 Guimarães, Portugal
- LABBELS-Associate
Laboratory, Campus de
Gualtar, 4800-058 Braga, Guimarães, Portugal
| | - Pedro M. Martins
- Institute
of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, 4710-057 Braga, Portugal
- Centre
of Molecular and Environmental Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Senentxu Lanceros-Méndez
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, 4710-057 Braga, Portugal
- Laboratory
of Physics for Materials and Emergent Technologies, LapMET, University of Minho, 4710-057 Braga, Portugal
- BCMaterials,
Basque Center for Materials, Applications
and Nanostructures, UPV/EHU
Science Park, 48940 Leioa, Spain
- Ikerbasque, Basque Foundation for Science, 48009 Bilbao, Spain
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9
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Ono S. Recent Advanced Applications of Ionic Liquid for Future Iontronics. CHEM REC 2023; 23:e202300045. [PMID: 37098877 DOI: 10.1002/tcr.202300045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/29/2023] [Indexed: 04/27/2023]
Abstract
Recently, electronic devices that make use of a state called the electric double layers (EDL) of ion have opened up a wide range of research opportunities, from novel physical phenomena in solid-state materials to next-generation low-power consumption devices. They are considered to be the future iontronics devices. EDLs behave as nanogap capacitors, resulting the high density of charge carriers is induced at semiconductor/electrolyte by applying only a few volts of the bias voltage. This enables the low-power operation of electronic devices as well as new functional devices. Furthermore, by controlling the motion of ions, ions can be used as semi-permanent charge to form electrets. In this article, we are going to introduce the recent advanced application of iontronics devices as well as energy harvesters making use of ion-based electrets, leading to the future iontronics research.
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Affiliation(s)
- Shimpei Ono
- Energy Transformation Research Laboratory, Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa, 240-0196, Japan
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10
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Nan X, Xu Z, Cao X, Hao J, Wang X, Duan Q, Wu G, Hu L, Zhao Y, Yang Z, Gao L. A Review of Epidermal Flexible Pressure Sensing Arrays. BIOSENSORS 2023; 13:656. [PMID: 37367021 DOI: 10.3390/bios13060656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/11/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023]
Abstract
In recent years, flexible pressure sensing arrays applied in medical monitoring, human-machine interaction, and the Internet of Things have received a lot of attention for their excellent performance. Epidermal sensing arrays can enable the sensing of physiological information, pressure, and other information such as haptics, providing new avenues for the development of wearable devices. This paper reviews the recent research progress on epidermal flexible pressure sensing arrays. Firstly, the fantastic performance materials currently used to prepare flexible pressure sensing arrays are outlined in terms of substrate layer, electrode layer, and sensitive layer. In addition, the general fabrication processes of the materials are summarized, including three-dimensional (3D) printing, screen printing, and laser engraving. Subsequently, the electrode layer structures and sensitive layer microstructures used to further improve the performance design of sensing arrays are discussed based on the limitations of the materials. Furthermore, we present recent advances in the application of fantastic-performance epidermal flexible pressure sensing arrays and their integration with back-end circuits. Finally, the potential challenges and development prospects of flexible pressure sensing arrays are discussed in a comprehensive manner.
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Affiliation(s)
- Xueli Nan
- School of Automation and Software Engineering, Shanxi University, Taiyuan 030006, China
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Zhikuan Xu
- School of Automation and Software Engineering, Shanxi University, Taiyuan 030006, China
| | - Xinxin Cao
- School of Automation and Software Engineering, Shanxi University, Taiyuan 030006, China
| | - Jinjin Hao
- School of Automation and Software Engineering, Shanxi University, Taiyuan 030006, China
| | - Xin Wang
- School of Automation and Software Engineering, Shanxi University, Taiyuan 030006, China
| | - Qikai Duan
- School of Automation and Software Engineering, Shanxi University, Taiyuan 030006, China
| | - Guirong Wu
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
| | - Liangwei Hu
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
| | - Yunlong Zhao
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
- Discipline of Intelligent Instrument and Equipment, Xiamen University, Xiamen 361102, China
| | - Zekun Yang
- Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education, North University of China, Taiyuan 030051, China
| | - Libo Gao
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
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11
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Grzybowski AZ, Domański Z, Derda T. Optimal Stopping Rules for Preventing Overloading of Multicomponent Systems. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2817. [PMID: 37049111 PMCID: PMC10096414 DOI: 10.3390/ma16072817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 03/25/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
When random-strength components work as an interconnected parallel system, then its carrying capacity is random as well. In a case where such a multicomponent system is a subject of the stepwise-growing workload, some of its components fail and their loads are taken over by the ones that are intact. When the loading process is continued, the additional loads trigger consecutive failures that degrade the system, eventually leading to a complete failure. If the goal of the system is to carry as much load as possible, then the loading process should be continued, but no longer than until the loading capacity of the whole system is reached. On the other hand, with every additional load step, a failure of the system becomes more probable, as the carrying capacity is random and known solely through its probability distribution. In such cases, the decision on when to cease the loading process is not obvious. We introduce and analyse a minimal model of failure spreading in an array of progressively loaded pillars controlled by a decision-maker who stops the process when a required load is attained. We show how to construct an optimal stopping rule. Under some additional assumptions regarding the adopted loss function, it is argued that the optimal stopping rule is of the threshold type and it significantly depends on the shape of the load-step probability distribution.
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12
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Zhao X, Zhao S, Zhang X, Su Z. Recent progress in flexible pressure sensors based on multiple microstructures: from design to application. NANOSCALE 2023; 15:5111-5138. [PMID: 36852534 DOI: 10.1039/d2nr06084a] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Flexible pressure sensors (FPSs) have been widely studied in the fields of wearable medical monitoring and human-machine interaction due to their high flexibility, light weight, sensitivity, and easy integration. To better meet these application requirements, key sensing properties such as sensitivity, linear sensing range, pressure detection limits, response/recovery time, and durability need to be effectively improved. Therefore, researchers have extensively and profoundly researched and innovated on the structure of sensors, and various microstructures have been designed and applied to effectively improve the sensing performance of sensors. Compared with single microstructures, multiple microstructures (MMSs) (including hierarchical, multi-layered and hybrid microstructures) can improve the sensing performance of sensors to a greater extent. This paper reviews the recent research progress in the design and application of FPSs with MMSs and systematically summarizes the types, sensing mechanisms, and preparation methods of MMSs. In addition, we summarize the applications of FPSs with MMSs in the fields of human motion detection, health monitoring, and human-computer interaction. Finally, we provide an outlook on the prospects and challenges for the development of FPSs.
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Affiliation(s)
- Xin Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, 100029 Beijing, China.
| | - Shujing Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, 100029 Beijing, China.
| | - Xiaoyuan Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, 100029 Beijing, China.
| | - Zhiqiang Su
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, 100029 Beijing, China.
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13
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Okhay O, Tkach A. Current Achievements in Flexible Piezoelectric Nanogenerators Based on Barium Titanate. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:988. [PMID: 36985882 PMCID: PMC10053931 DOI: 10.3390/nano13060988] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 02/28/2023] [Accepted: 03/07/2023] [Indexed: 06/18/2023]
Abstract
Harvesting ambient mechanical energy at the nanometric scale holds great promise for powering small electronics and achieving self-powered electronic devices. The current review is focused on kinetic energy harvesters, particularly on flexible piezoelectric nanogenerators (p-NGs) based on barium titanate (BaTiO3) nanomaterials. p-NGs based on nanotubes, nanowires, nanofibres, nanoplatelets, nanocubes or nanoparticles of BaTiO3 fabricated in vertical or lateral orientation, as well as mixed composite structures, are overviewed here. The achievable power output level is shown to depend on the fabrication method, processing parameters and potential application conditions. Therefore, the most widely studied aspects, such as influence of geometry/orientation, BaTiO3 content, poling process and other factors in the output performance of p-NGs, are discussed. The current standing of BaTiO3-based p-NGs as possible candidates for various applications is summarized, and the issues that need to be addressed for realization of practical piezoelectric energy harvesting devices are discussed.
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Affiliation(s)
- Olena Okhay
- TEMA-Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
- LASI-Intelligent Systems Associate Laboratory, 4800-058 Guimaraes, Portugal
| | - Alexander Tkach
- CICECO-Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
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14
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Chai B, Shi K, Wang Y, Liu Y, Liu F, Jiang P, Sheng G, Wang S, Xu P, Xu X, Huang X. Modulus-Modulated All-Organic Core-Shell Nanofiber with Remarkable Piezoelectricity for Energy Harvesting and Condition Monitoring. NANO LETTERS 2023; 23:1810-1819. [PMID: 36648158 DOI: 10.1021/acs.nanolett.2c04674] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The low piezoelectricity of piezoelectric polymers significantly restricts their applications. Introducing inorganic fillers can slightly improve the piezoelectricity of polymers, whereas it is usually at the cost of flexibility and durability. In this work, using a modulus-modulated core-shell structure strategy, all-organic nanofibers with remarkable piezoelectricity were designed and prepared by a coaxial electrospinning method. It was surprisingly found that the introduction of a nonpiezoelectric polymeric core (e.g., polycarbonate, PC) can result in 110% piezoelectric coefficient (d33) enhancement in a poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) nanofiber. Accordingly, the all-organic PVDF-TrFE@PC core-shell nanofiber exhibits record-high energy-harvesting performance (i.e., 126 V output voltage, 710 mW m-2 power density) among the reported organic piezoelectric materials. In addition, the excellent sensing capability of the core-shell nanofiber enabled us to develop a wireless vibration monitoring and analyzing system, which realizes the real-time vibration detection of a power transformer.
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Affiliation(s)
- Bin Chai
- Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Department of Polymer Science and Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Kunming Shi
- Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Department of Polymer Science and Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Yalin Wang
- Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Yijie Liu
- Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Department of Polymer Science and Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Fei Liu
- Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Department of Polymer Science and Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Pingkai Jiang
- Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Department of Polymer Science and Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Gehao Sheng
- Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Shaojing Wang
- State Grid Shanghai Municipal Electric Power Company, Shanghai 200437, People's Republic of China
| | - Peng Xu
- State Grid Shanghai Municipal Electric Power Company, Shanghai 200437, People's Republic of China
| | - Xiangyi Xu
- State Grid Shanghai Municipal Electric Power Company, Shanghai 200437, People's Republic of China
| | - Xingyi Huang
- Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Department of Polymer Science and Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
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15
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Hasija A, Thompson AJ, Singh L, S N M, Mangalampalli KSRN, McMurtrie JC, Bhattacharjee M, Clegg JK, Chopra D. Plastic Deformation in a Molecular Crystal Enables a Piezoresistive Response. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206169. [PMID: 36587988 DOI: 10.1002/smll.202206169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Organic materials are promising candidates for the development of efficient sensors for many medicinal and materials science applications. Single crystals of a small molecule, 4-trifluoromethyl phenyl isothiocyanate (4CFNCS), exhibit plastic deformation when bent, twisted, or coiled. Synchrotron micro-focus X-ray diffraction mapping of the bent region of the crystal confirms the mechanism of deformation. The crystals are incorporated into a flexible piezoresistive sensor using a composite constituting PEDOT: PSS/4CFNCS, which shows an impressive performance at high-pressure ranges (sensitivity 0.08 kPa-1 above 44 kPa).
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Affiliation(s)
- Avantika Hasija
- Crystallography and Crystal Chemistry Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-Pass Road, Bhopal, MP, 462066, India
| | - Amy J Thompson
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Lakhvir Singh
- i-lab, Electrical Engineering and Computer Science, Indian Institute of Science Education and Research Bhopal, Bhopal, MP, 462066, India
| | - Megha S N
- Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chennai, Kanchipuram, 603203, India
| | - Kiran S R N Mangalampalli
- Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chennai, Kanchipuram, 603203, India
| | - John C McMurtrie
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD, 4000, Australia
| | - Mitradip Bhattacharjee
- i-lab, Electrical Engineering and Computer Science, Indian Institute of Science Education and Research Bhopal, Bhopal, MP, 462066, India
| | - Jack K Clegg
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Deepak Chopra
- Crystallography and Crystal Chemistry Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-Pass Road, Bhopal, MP, 462066, India
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16
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Yu Z, Gao F, He X, Jin H, Dong S, Cao Z, Luo J. Flexible Film Bulk Acoustic Resonator Based on Low-Porosity β-Phase P(VDF-TrFE) Film for Human Vital Signs Monitoring. SENSORS (BASEL, SWITZERLAND) 2023; 23:2136. [PMID: 36850733 PMCID: PMC9962757 DOI: 10.3390/s23042136] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
P(VDF-TrFE) is a promising material for flexible acoustic devices owing to its good piezoelectric performance and excellent stretchability. However, the high density of internal pores and large surface roughness of the conventional P(VDF-TrFE) results in a high propagation attenuation for acoustic waves, which limits its use in flexible acoustic devices. In this paper, a novel method based on two-step annealing is proposed to effectively remove the pores inside the P(VDF-TrFE) film and reduce its surface roughness. The obtained P(VDF-TrFE) film possesses excellent characteristics, including a high breakdown strength of >300 kV/mm, a high-purity β-phase content of more than 80%, and high piezoelectric coefficients (d33) of 42 pm/V. Based on the low-porosity β-phase P(VDF-TrFE) film, we fabricated flexible film bulk acoustic resonators (FBARs) which exhibit high sharp resonance peaks. The pressure sensor was made by sandwiching the FBARs with two PDMS microneedle patches. Heartbeat and respiration rate monitoring were achieved using the pressure sensor. This work demonstrates the feasibility of high-performance flexible piezoelectric acoustic resonators based on low-porosity P(VDF-TrFE) films, which could see wider applications in the wearable sensors for both physical and chemical sensing.
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Affiliation(s)
- Zhentao Yu
- Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
| | - Feng Gao
- Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
| | - Xiangyu He
- Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hao Jin
- Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
| | - Shurong Dong
- Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
| | - Zhen Cao
- Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jikui Luo
- Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
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17
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Li C, Xu Z, Xu S, Wang T, Zhou S, Sun Z, Wang ZL, Tang W. Miniaturized retractable thin-film sensor for wearable multifunctional respiratory monitoring. NANO RESEARCH 2023; 16:1-9. [PMID: 36785562 PMCID: PMC9907204 DOI: 10.1007/s12274-023-5420-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/18/2022] [Accepted: 12/18/2022] [Indexed: 06/18/2023]
Abstract
As extremely important physiological indicators, respiratory signals can often reflect or predict the depth and urgency of various diseases. However, designing a wearable respiratory monitoring system with convenience, excellent durability, and high precision is still an urgent challenge. Here, we designed an easy-fabricate, lightweight, and badge reel-like retractable self-powered sensor (RSPS) with high precision, sensitivity, and durability for continuous detection of important indicators such as respiratory rate, apnea, and respiratory ventilation. By using three groups of interdigital electrode structures with phase differences, combined with flexible printed circuit boards (FPCBs) processing technology, a miniature rotating thin-film triboelectric nanogenerator (RTF-TENG) was developed. Based on discrete sensing technology, the RSPS has a sensing resolution of 0.13 mm, sensitivity of 7 P·mm-1, and durability more than 1 million stretching cycles, with low hysteresis and excellent anti-environmental interference ability. Additionally, to demonstrate its wearability, real-time, and convenience of respiratory monitoring, a multifunctional wearable respiratory monitoring system (MWRMS) was designed. The MWRMS demonstrated in this study is expected to provide a new and practical strategy and technology for daily human respiratory monitoring and clinical diagnosis. Electronic Supplementary Material Supplementary material (additional figures and movies, including the production process of respiratory monitoring straps, the mechanical analysis of RSPS, RTF-TENG versus vector TENG sensors, the simulation studies of TE-TENG and FT-TENG, the additional characterization of RTF-TENG, the tensile and robustness tests of RSPS, the characterizations of the MWRMS during different sleeping positions, detailed circuit schematic of the MWRMS, the displacements and phase relations of RSPS, MWRMS for multifunctional respiratory monitoring) is available in the online version of this article at 10.1007/s12274-023-5420-1.
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Affiliation(s)
- Chengyu Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400 China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Zijie Xu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400 China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Shuxing Xu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400 China
- Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004 China
| | - Tingyu Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400 China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Siyu Zhou
- Peking University Third Hospital, Beijing, 100191 China
| | - Zhuoran Sun
- Peking University Third Hospital, Beijing, 100191 China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400 China
- Georgia Institute of Technology, Atlanta, GA 30332 USA
| | - Wei Tang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400 China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049 China
- Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004 China
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18
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Song T, Wang Y, Li H, Wang H, Sun X, Yan S. Influence of Aliphatic Polyesters on the γ Phase Crystallization of Poly(vinylidene fluoride). Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Affiliation(s)
- Tiantian Song
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Yuxin Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Huihui Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Haijun Wang
- Shaanxi University of Science and Technology, Xi’an710021, China
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing100029, China
- Key Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Rd., Qingdao266042, China
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19
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Hou C, Zhang W, Dai X, Qiu J, Russell TP, Sun X, Yan S. Spatially Confined Fabrication of Polar Poly(Vinylidene Fluoride) Nanotubes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2205790. [PMID: 36351233 DOI: 10.1002/smll.202205790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Polar poly(vinylidene fluoride) (PVDF) nanotubes have attracted significant attention due to their excellent piezoelectric and ferroelectric properties, yet a tunable fabrication of homogeneous polar PVDF nanotubes remains a challenge. Here, a simple method is reported to fabricate polar PVDF nanotubes using anodize aluminum oxide (AAO) membranes as templates that are removed by etching in a potassium hydroxide (KOH) solution and then ageing at room temperature. PVDF nanotubes originally crystallized in the AAO membrane are pure α-crystals with very low crystallinity, yet after being released from the templates, the crystallinity of the nanotubes markedly increases with ageing at room temperature, leading to the formation of β-PVDF crystals in a very short time, with the formation of γ crystals after longer ageing times. A large amount of γ crystals formed when the released PVDF nanotubes are heated to ≈130 °C. The formation of polar PVDF nanotubes released from the AAO templates treated with higher concentrations of alkaline solution results from the reaction of the surface of the PVDF nanotubes with the alkaline solution and structure reorganization under confined conditions. This large-scale preparation of β- and γ-PVDF opens a new pathway to produce polar PVDF nanomaterials.
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Affiliation(s)
- Chunyue Hou
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Wenxian Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiying Dai
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jieshan Qiu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Thomas P Russell
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, MA, 01003, USA
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao, 266042, China
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20
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Synthesis and ferroelectric behaviour of an axially symmetric octahedral [Cu6L8]12+ cage. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02112-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Chen G, Shen S, Tat T, Zhao X, Zhou Y, Fang Y, Chen J. Wearable respiratory sensors for COVID-19 monitoring. VIEW 2022; 3:20220024. [PMID: 36710943 PMCID: PMC9874505 DOI: 10.1002/viw.20220024] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/07/2022] [Accepted: 10/08/2022] [Indexed: 11/30/2022] Open
Abstract
Since its outbreak in 2019, COVID-19 becomes a pandemic, severely burdening the public healthcare systems and causing an economic burden. Thus, societies around the world are prioritizing a return to normal. However, fighting the recession could rekindle the pandemic owing to the lightning-fast transmission rate of SARS-CoV-2. Furthermore, many of those who are infected remain asymptomatic for several days, leading to the increased possibility of unintended transmission of the virus. Thus, developing rigorous and universal testing technologies to continuously detect COVID-19 for entire populations remains a critical challenge that needs to be overcome. Wearable respiratory sensors can monitor biomechanical signals such as the abnormities in respiratory rate and cough frequency caused by COVID-19, as well as biochemical signals such as viral biomarkers from exhaled breaths. The point-of-care system enabled by advanced respiratory sensors is expected to promote better control of the pandemic by providing an accessible, continuous, widespread, noninvasive, and reliable solution for COVID-19 diagnosis, monitoring, and management.
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Affiliation(s)
- Guorui Chen
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCalifornia90095USA
| | - Sophia Shen
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCalifornia90095USA
| | - Trinny Tat
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCalifornia90095USA
| | - Xun Zhao
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCalifornia90095USA
| | - Yihao Zhou
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCalifornia90095USA
| | - Yunsheng Fang
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCalifornia90095USA
| | - Jun Chen
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCalifornia90095USA
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22
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Jang J, Choi C, Kim KW, Okayama Y, Lee JH, Read de Alaniz J, Bates CM, Kim JK. Triboelectric Nanogenerators: Enhancing Performance by Increasing the Charge-Generating Layer Compressibility. ACS Macro Lett 2022; 11:1291-1297. [DOI: 10.1021/acsmacrolett.2c00535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Junho Jang
- National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of Korea
| | - Chungryong Choi
- Department of Polymer Science and Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk39177, Republic of Korea
| | - Keon-Woo Kim
- National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of Korea
| | | | - Ju Hyun Lee
- National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of Korea
| | | | | | - Jin Kon Kim
- National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of Korea
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23
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Chen Q, Yang J, Chen B, Feng J, Xiao S, Yue Q, Zhang X, Wang T. Wearable Pressure Sensors with Capacitive Response over a Wide Dynamic Range. ACS APPLIED MATERIALS & INTERFACES 2022; 14:44642-44651. [PMID: 36130032 DOI: 10.1021/acsami.2c10555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
At present, there are mainly two types of capacitive pressure sensors based on ordinary capacitance and electrical double layer (EDL) capacitance. However, few researchers have combined these two types of capacitors in pressure sensing to improve the dynamic range of a sensor under pressure. Here, we fabricated a capacitive pressure sensor with an asymmetric structure based on poly(vinylidene fluoride-co-hexafluoropropylene) using a simple electrospinning process. A layer of mixed ionic nanofiber membrane and a layer of pure nanofiber membrane were stacked and used as the dielectric layer of the sensor. Due to the porous structure and non-stickiness of the pure nanofiber membrane, it can be penetrated by the mixed ionic nanofiber membrane under pressure, realizing the reversible conversion from ordinary capacitance to EDL capacitance, thereby achieving a great change in the capacitance value. The sensitivities of the sensor are 55.66 and 24.72 kPa-1 in the pressure ranges of 0-31.11 and 31.11-66.67 kPa, respectively, with good cycle stability, fast loading-unloading response time, and an ultra-low pressure detection limit as low as 0.087 Pa. Finally, this sensor was used for the detection of human physiological signals, and the sensor would have potential applications in the fields of human tactile sensing systems, bionic robots, and wearable devices.
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Affiliation(s)
- Qianling Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Jing Yang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Bin Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Jiansong Feng
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Songhua Xiao
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Quan Yue
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Xu Zhang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Taihong Wang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
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24
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Athira BS, George A, Vaishna Priya K, Hareesh US, Gowd EB, Surendran KP, Chandran A. High-Performance Flexible Piezoelectric Nanogenerator Based on Electrospun PVDF-BaTiO 3 Nanofibers for Self-Powered Vibration Sensing Applications. ACS APPLIED MATERIALS & INTERFACES 2022; 14:44239-44250. [PMID: 36129836 DOI: 10.1021/acsami.2c07911] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In the present era of intelligent electronics and Internet of Things (IoT), the demand for flexible and wearable devices is very high. Here, we have developed a high-output flexible piezoelectric nanogenerator (PENG) based on electrospun poly(vinylidene fluoride) (PVDF)-barium titanate (BaTiO3) (ES PVDF-BT) composite nanofibers with an enhanced electroactive phase. On addition of 10 wt % BaTiO3 nanoparticles, the electroactive β-phase of the PVDF is found to be escalated to ∼91% as a result of the synergistic interfacial interaction between the tetragonal BaTiO3 nanoparticles and the ferroelectric host polymer matrix on electrospinning. The fabricated PENG device delivered an open-circuit voltage of ∼50 V and short-circuit current density of ∼0.312 mA m-2. Also, the PVDF-BT nanofiber-based PENG device showed an output power density of ∼4.07 mW m-2, which is 10 times higher than that of a pristine PVDF nanofiber-based PENG device. Furthermore, the developed PENG has been newly demonstrated for self-powered real-time vibration sensing applications such as for mapping of mechanical vibrations from faulty CPU fans, hard disk drives, and electric sewing machines.
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Affiliation(s)
- B S Athira
- Materials Science and Technology Division, CSIR─National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ashitha George
- Materials Science and Technology Division, CSIR─National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - K Vaishna Priya
- Materials Science and Technology Division, CSIR─National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - U S Hareesh
- Materials Science and Technology Division, CSIR─National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - E Bhoje Gowd
- Materials Science and Technology Division, CSIR─National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kuzhichalil Peethambharan Surendran
- Materials Science and Technology Division, CSIR─National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Achu Chandran
- Materials Science and Technology Division, CSIR─National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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25
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Zhou J, Gou X, Fan D, Wang J, Wan Z. Polydimethylsiloxane/BaTiO 3 Nanogenerators with a Surface-Assembled Mosaic Structure for Enhanced Piezoelectric Sensing. ACS APPLIED MATERIALS & INTERFACES 2022; 14:38105-38115. [PMID: 35969676 DOI: 10.1021/acsami.2c04196] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Incorporation of inorganic piezoelectric ceramic nanoparticles into a highly elastic polymer matrix is an effective method to develop self-powered sensors and energy harvesters. Herein, a piezoelectrically enhanced nanogenerator (NG) obtained by dispersing lead-free BaTiO3 piezoelectric nanoparticles into elastic polydimethylsiloxane and further surface-modifying with a neoteric mosaic structure for self-powered sensing is proposed. The composites fabricated through this facile and low-cost approach exhibit enhanced voltage by a factor of 1.5 relative to those without modification and display improved mechanical properties with increased elongation at break (failure strain of 150%). The improved performance is mainly attributed to the embossed mosaic structure on the surface, which is theoretically verified by multiphysics simulation. The NGs exhibit highly sensitive and stable piezoelectric output under contact and noncontact working modes and can be applied to detect human vital signs, including bending of fingers and wrists, and various breathing activities, demonstrating wide applications in flexible and smart wearable electronics. The design of the neoteric mosaic structure could be extended to other composite-based NGs, offering significant advantages for the rational design of flexible electronics.
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Affiliation(s)
- Junyu Zhou
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, P. R. China
| | - Xue Gou
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, P. R. China
| | - Duan Fan
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, P. R. China
| | - Jiayi Wang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, P. R. China
| | - Zhengjun Wan
- National Institute of Measurement and Testing Technology, Chengdu, Sichuan 610031, P. R. China
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26
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Fang Y, Xu J, Xiao X, Zou Y, Zhao X, Zhou Y, Chen J. A Deep-Learning-Assisted On-Mask Sensor Network for Adaptive Respiratory Monitoring. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200252. [PMID: 35306703 DOI: 10.1002/adma.202200252] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/21/2022] [Indexed: 05/07/2023]
Abstract
Wearable respiratory monitoring is a fast, non-invasive, and convenient approach to provide early recognition of human health abnormalities like restrictive and obstructive lung diseases. Here, a computational fluid dynamics assisted on-mask sensor network is reported, which can overcome different user facial contours and environmental interferences to collect highly accurate respiratory signals. Inspired by cribellate silk, Rayleigh-instability-induced spindle-knot fibers are knitted for the fabrication of permeable and moisture-proof textile triboelectric sensors that hold a decent signal-to-noise ratio of 51.2 dB, a response time of 0.28 s, and a sensitivity of 0.46 V kPa-1 . With the assistance of deep learning, the on-mask sensor network can realize the respiration pattern recognition with a classification accuracy up to 100%, showing great improvement over a single respiratory sensor. Additionally, a customized user-friendly cellphone application is developed to connect the processed respiratory signals for real-time data-driven diagnosis and one-click health data sharing with the clinicians. The deep-learning-assisted on-mask sensor network opens a new avenue for personalized respiration management in the era of the Internet of Things.
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Affiliation(s)
- Yunsheng Fang
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jing Xu
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Xiao Xiao
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Yongjiu Zou
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Xun Zhao
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Yihao Zhou
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jun Chen
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
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27
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Wang L, Chen Z, Zhang Y, Liu C, Yuan J, Liu Y, Ge W, Lin S, An Q, Feng Z. Synergistically active piezoelectrical H2O2 production composite film achieved from catalytically inert PVDF-HFP matrix and SiO2 fillers. Chem Asian J 2022; 17:e202200278. [PMID: 35596666 DOI: 10.1002/asia.202200278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/18/2022] [Indexed: 11/10/2022]
Abstract
Local and decentralized H 2 O 2 production via piezoelectrical process promise smart biological utilization as well as environmental benefits. However, stable, bio/environmental- safe, and easily applied H 2 O 2 generation materials are still lacking. Here we report a novel flexible H 2 O 2 generation polymeric film composed of catalytically inert PVDF-HFP (Poly(vinylidene fluoride-co-hexafluoropropylene)) matrix and SiO 2 nanoparticle fillers. The film is bio-/environmentally benign at resting states, but effectively produces H 2 O 2 upon ultrasonic motivation at a production rate of 492 μmol [[EQUATION]] in one hour. Experimental and simulation methods in combination indicate that the effective H 2 O 2 generation capabilities stem from the synergistic existence of piezoelectrical fields and the air-liquid-solid three-phase regions around the porous film. The chemical conversions are motivated by the adsorbed charges. The silicon hydroxyl groups properly stabilize the *OOH intermediate and facilitate the chemical conversions of 2e - ORR of ambient O 2 . We expect the report to inspire H 2 O 2 piezoelectrical generation materials and promote the novel production strategies of H 2 O 2 as well as piezoelectrical functional materials.
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Affiliation(s)
- Lingchao Wang
- China University of Geosciences Beijing, School of Materials Science and Technology, 29th Xueyuan Road, 100083, Beijing, CHINA
| | - Zhensheng Chen
- China University of Geosciences Beijing, School of Materials Science and Technology, 29th Xueyuan Road, 100083, Beijing, CHINA
| | - Yihe Zhang
- China University of Geosciences Beijing, School of Materials Science and Technology, 29th Xueyuan Road, 100083, CHINA
| | - Chao Liu
- China University of Geosciences Beijing, School of Materials Science and Technology, 29th Xueyuan Road, 100083, Beijing, CHINA
| | - Jinpeng Yuan
- China University of Geosciences Beijing, School of Materials Science and Technology, 29th Xueyuan Road, 100083, Beijing, CHINA
| | - Yulun Liu
- China University of Geosciences Beijing, School of Materials Science and Technology, 100083, Beijing, CHINA
| | - Weiyi Ge
- China University of Geosciences Beijing, School of Materials Science and Technology, 100083, Beijing, CHINA
| | - Sen Lin
- China University of Geosciences Beijing, School of Materials Science and Technology, 29th Xueyuan Road, 100083, Beijing, CHINA
| | - Qi An
- China University of Geosciences Beijing, School of materials sciences and engineering, 29th Xueyuan Road, 100083, Beijing, CHINA
| | - Zeguo Feng
- The First Medical Center of Chinese PLA General Hospital, Department of Pain, 100083, Beijing, CHINA
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28
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Lin JC, Liatsis P, Alexandridis P. Flexible and Stretchable Electrically Conductive Polymer Materials for Physical Sensing Applications. POLYM REV 2022. [DOI: 10.1080/15583724.2022.2059673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Jui-Chi Lin
- Department of Biomedical Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY, USA
| | - Panos Liatsis
- Department of Electrical Engineering and Computer Science, Khalifa University, Abu Dhabi, UAE
| | - Paschalis Alexandridis
- Department of Biomedical Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY, USA
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY, USA
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29
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Dong W, Xiao H, Jia Y, Chen L, Geng H, Bakhtiar SUH, Fu Q, Guo Y. Engineering the Defects and Microstructures in Ferroelectrics for Enhanced/Novel Properties: An Emerging Way to Cope with Energy Crisis and Environmental Pollution. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105368. [PMID: 35240724 PMCID: PMC9069204 DOI: 10.1002/advs.202105368] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 02/07/2022] [Indexed: 06/14/2023]
Abstract
In the past century, ferroelectrics are well known in electroceramics and microelectronics for their unique ferroelectric, piezoelectric, pyroelectric, and photovoltaic effects. Nowadays, the advances in understanding and tuning of these properties have greatly promoted a broader application potential especially in energy and environmental fields, by harvesting solar, mechanical, and heat energies. For example, high piezoelectricity and high pyroelectricity can be designed by defect or microstructure engineering for piezo- and pyro-catalyst, respectively. Moreover, highly piezoelectric and broadband (UV-Vis-NIR) light-responsive ferroelectrics can be designed via defect engineering, giving rise to a new concept of photoferroelectrics for efficient photocatalysis, piezocatalysis, pyrocatalysis, and related cocatalysis. This article first summarizes the recent developments in ferroelectrics in terms of piezoelectricity, pyroelectricity, and photovoltaic effects based on defect and microstructure engineering. Then, the potential applications in energy generation (i.e., photovoltaic effect, H2 generation, and self-powered multisource energy harvesting and signal sensing) and environmental protection (i.e., photo-piezo-pyro- cocatalytic dye degradation and CO2 reduction) are reviewed. Finally, the outlook and challenges are discussed. This article not only covers an overview of the state-of-art advances of ferroelectrics, but also prospects their applications in coping with energy crisis and environmental pollution.
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Affiliation(s)
- Wen Dong
- State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
- Functional Ceramics of the Ministry of EducationSchool of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley LaboratoryHuazhong University of Science and TechnologyWuhan430074China
| | - Hongyuan Xiao
- State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
| | - Yanmin Jia
- School of ScienceXi'an University of Posts & TelecommunicationsXi'an710121China
| | - Long Chen
- Functional Ceramics of the Ministry of EducationSchool of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley LaboratoryHuazhong University of Science and TechnologyWuhan430074China
| | - Huangfu Geng
- State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
| | - Syed Ul Hasnain Bakhtiar
- Functional Ceramics of the Ministry of EducationSchool of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley LaboratoryHuazhong University of Science and TechnologyWuhan430074China
| | - Qiuyun Fu
- Functional Ceramics of the Ministry of EducationSchool of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley LaboratoryHuazhong University of Science and TechnologyWuhan430074China
| | - Yiping Guo
- State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
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30
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Tan Z, Chen S, Mao X, Lv H, Wang Y, Ye X. Antifouling BaTiO 3/PVDF piezoelectric membrane for ultrafiltration of oily bilge water. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 85:2980-2992. [PMID: 35638800 DOI: 10.2166/wst.2022.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Barium titanate/polyvinylidene fluoride (BaTiO3/PVDF) piezoelectric membrane was successfully prepared and generated in-situ vibrations to reduce membrane fouling by applying alternating current (AC) signal for oily bilge water ultrafiltration. The effect of in-situ vibration on membrane fouling was investigated through changing in the excitation alternating voltage and its frequency, pH, crossflow rate. The results indicated that the piezoelectric membrane by applying AC signal remarkably alleviated the membrane fouling for bilge water ultrafiltration. The membrane fouling decreased with increasing the AC signal voltage. The final steady-state permeate flux from the piezoelectric membrane for bilge water ultrafiltration increased with the AC signal voltage, raising it by up to 63.4% at AC signal voltage of 20 V compared to that of the membrane without applying AC voltage. The high permeate flux was obtained at the resonant frequency of 220 kHz. During the 50-h ultrafiltration of bilge water with the piezoelectric membrane excited at 220 kHz and 15 V, the permeate flux from the membrane was stable. The oil concentration in outflow from the piezoelectric membrane was below 14 ppm, which met the discharged level required by IMO convention. The total organic carbon removal rate in bilge water was over 94%.
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Affiliation(s)
- Zhirong Tan
- School of Navigation, Wuhan University of Technology, Wuhan 430063, PR China; Hubei Key Laboratory of Inland Shiping Technology, Wuhan 430063, PR China
| | - Shuiping Chen
- School of Resource & Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China E-mail:
| | - Xin Mao
- School of Navigation, Wuhan University of Technology, Wuhan 430063, PR China; Hubei Key Laboratory of Inland Shiping Technology, Wuhan 430063, PR China
| | - Heng Lv
- School of Resource & Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China E-mail:
| | - Yong Wang
- School of the Environment, Nanjing University, NanJing 210023, PR China
| | - Xiaoqing Ye
- School of Navigation, Wuhan University of Technology, Wuhan 430063, PR China; Hubei Key Laboratory of Inland Shiping Technology, Wuhan 430063, PR China
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31
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Pei H, Shi S, Chen Y, Xiong Y, Lv Q. Combining Solid-State Shear Milling and FFF 3D-Printing Strategy to Fabricate High-Performance Biomimetic Wearable Fish-Scale PVDF-Based Piezoelectric Energy Harvesters. ACS APPLIED MATERIALS & INTERFACES 2022; 14:15346-15359. [PMID: 35324160 DOI: 10.1021/acsami.2c02491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
High-performance flexible piezoelectric polymer-ceramic composites are in high demand for increasing wearable energy-harvesting applications. In this work, a strategy combining solid-state shear milling (S3M) and fused filament fabrication (FFF) 3D-printing technology is proposed for the fabrication of high-performance biomimetic wearable piezoelectric poly(vinylidene fluoride) (PVDF)/tetraphenylphosphonium chloride (TPPC)/barium titanate (BaTiO3) nanocomposite energy harvesters with a biomimetic fish-scale-like metamaterial. The S3M technology could greatly improve the dispersion of BaTiO3 sub-micrometer particles and the interfacial compatibility, resulting in better processability and piezoelectric performance of the nanocomposites. Typically, the FFF 3D printed energy harvester incorporating 30 wt % BaTiO3 showed the highest piezoelectric outputs with an open-circuit voltage of 11.5 V and a short-circuit current of 220 nA. It could hence drive nine green LEDs to work normally. In addition, a 3D-printed biomimetic wearable energy harvester inspired by an environmentally adaptive fish-scale-like metamaterial was further fabricated. The fish-scale-like energy harvester could harvest energy through different deformation motions and successfully recharge a 4.7 μF capacitor by being mounted on a bicycle tire and the tire's rolling. This work not only provides a 3D printing strategy for designing diversified and complex geometric structures but also paves the way for further applications in flexible, wearable, self-powered electromechanical energy harvesters.
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Affiliation(s)
- Haoran Pei
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
| | - Shaohong Shi
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
- School of Resources, Environment and Materials, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, No. 100, Daxuedong Road, Nanning 530004, People's Republic of China
| | - Yinghong Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
| | - Yu Xiong
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
| | - Qinniu Lv
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
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32
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He L, Lu J, Han C, Liu X, Liu J, Zhang C. Electrohydrodynamic Pulling Consolidated High-Efficiency 3D Printing to Architect Unusual Self-Polarized β-PVDF Arrays for Advanced Piezoelectric Sensing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2200114. [PMID: 35218161 DOI: 10.1002/smll.202200114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Piezoelectric pressure sensors are important for applications in robotics, artificial intelligence, communication devices, etc. The hyperboloid is theoretically predicted to be an unusual 3D structure that allows concerted piezoelectric enhancement owing to its synergistic effects of geometrical stress confinement and stress concentration, but has not been experimentally fulfilled due to a lack of efficient architecting techniques. In this work, a 3D hyperboloidal arrayed self-polarized PVDF piezoelectric energy harvester (PEH) is successfully fabricated by incorporating electrohydrodynamic (EHD) pulling technology into fused deposition modeling (FDM) 3D printing. This strategy not only simplifies the layer-by-layer constructing procedure for arrays, but simultaneously realizes a self-polarized and high β-phase (92%) PVDF PEH in a single electric-pulling step, saving posttreatment such as poling and removing excessive additives. Such a PEH delivers a significantly enhanced piezoelectric potential which is around 8 times that of a 2D flat film sensor. Moreover, this PEH featuring excellent linearity within a wide pressure regime, enables the sensing of human activities in a relatively large force range, which is otherwise difficult for traditional film sensors to differentiate. This work demonstrates a potential roadmap to advanced piezoelectric sensors exploiting unusual 3D structures enabled by the unique EHD pulling coupled 3D printing technique.
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Affiliation(s)
- Lirong He
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Jin Lu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Cheng Han
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Xingang Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Jingfeng Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Chuhong Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
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33
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Deng W, Zhou Y, Libanori A, Chen G, Yang W, Chen J. Piezoelectric nanogenerators for personalized healthcare. Chem Soc Rev 2022; 51:3380-3435. [PMID: 35352069 DOI: 10.1039/d1cs00858g] [Citation(s) in RCA: 49] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The development of flexible piezoelectric nanogenerators has experienced rapid progress in the past decade and is serving as the technological foundation of future state-of-the-art personalized healthcare. Due to their highly efficient mechanical-to-electrical energy conversion, easy implementation, and self-powering nature, these devices permit a plethora of innovative healthcare applications in the space of active sensing, electrical stimulation therapy, as well as passive human biomechanical energy harvesting to third party power on-body devices. This article gives a comprehensive review of the piezoelectric nanogenerators for personalized healthcare. After a brief introduction to the fundamental physical science of the piezoelectric effect, material engineering strategies, device structural designs, and human-body centered energy harvesting, sensing, and therapeutics applications are also systematically discussed. In addition, the challenges and opportunities of utilizing piezoelectric nanogenerators for self-powered bioelectronics and personalized healthcare are outlined in detail.
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Affiliation(s)
- Weili Deng
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, USA. .,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - Yihao Zhou
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, USA.
| | - Alberto Libanori
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, USA.
| | - Guorui Chen
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, USA.
| | - Weiqing Yang
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - Jun Chen
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, USA.
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Park J, Kang DH, Chae H, Ghosh SK, Jeong C, Park Y, Cho S, Lee Y, Kim J, Ko Y, Kim JJ, Ko H. Frequency-selective acoustic and haptic smart skin for dual-mode dynamic/static human-machine interface. SCIENCE ADVANCES 2022; 8:eabj9220. [PMID: 35333568 PMCID: PMC8956263 DOI: 10.1126/sciadv.abj9220] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 02/04/2022] [Indexed: 05/27/2023]
Abstract
Accurate transmission of biosignals without interference of surrounding noises is a key factor for the realization of human-machine interfaces (HMIs). We propose frequency-selective acoustic and haptic sensors for dual-mode HMIs based on triboelectric sensors with hierarchical macrodome/micropore/nanoparticle structure of ferroelectric composites. Our sensor shows a high sensitivity and linearity under a wide range of dynamic pressures and resonance frequency, which enables high acoustic frequency selectivity in a wide frequency range (145 to 9000 Hz), thus rendering noise-independent voice recognition possible. Our frequency-selective multichannel acoustic sensor array combined with an artificial neural network demonstrates over 95% accurate voice recognition for different frequency noises ranging from 100 to 8000 Hz. We demonstrate that our dual-mode sensor with linear response and frequency selectivity over a wide range of dynamic pressures facilitates the differentiation of surface texture and control of an avatar robot using both acoustic and mechanical inputs without interference from surrounding noise.
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Affiliation(s)
- Jonghwa Park
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Dong-hee Kang
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Heeyoung Chae
- Department of Electrical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Sujoy Kumar Ghosh
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Changyoon Jeong
- School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Yoojeong Park
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Seungse Cho
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Youngoh Lee
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Jinyoung Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Yujung Ko
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Jae Joon Kim
- Department of Electrical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
| | - Hyunhyub Ko
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 689-798, Republic of Korea
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Torabi A, Jafari SH, Khonakdar HA, Goodarzi V, Yu L, Skov AL. Electroactive phase enhancement in poly(vinylidene fluoride‐hexafluoropropylene)/polycarbonate blends by hybrid nanofillers. J Appl Polym Sci 2022. [DOI: 10.1002/app.51825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Atefeh Torabi
- School of Chemical Engineering, College of Engineering University of Tehran Tehran Iran
- Danish Polymer Centre, Department of Chemical and Biochemical Engineering Technical University of Denmark Lyngby Denmark
| | - Seyed Hassan Jafari
- School of Chemical Engineering, College of Engineering University of Tehran Tehran Iran
| | - Hossein Ali Khonakdar
- Department of Polymer Processing Iran Polymer and Petrochemical Institute Tehran Iran
- Department of Materials Engineering Leibniz Institute of Polymer Research Dresden Dresden Germany
| | - Vahabodin Goodarzi
- Applied Biotechnology Research Center Baqiyatallah University of Medical Sciences Tehran Iran
| | - Liyun Yu
- Danish Polymer Centre, Department of Chemical and Biochemical Engineering Technical University of Denmark Lyngby Denmark
| | - Anne Ladegaard Skov
- Danish Polymer Centre, Department of Chemical and Biochemical Engineering Technical University of Denmark Lyngby Denmark
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Yao B, Ye Z, Lou X, Yan Q, Han Z, Dong Y, Qu S, Wang Z. Wireless Rehabilitation Training Sensor Arrays Made with Hot Screen-Imprinted Conductive Hydrogels with a Low Percolation Threshold. ACS APPLIED MATERIALS & INTERFACES 2022; 14:12734-12747. [PMID: 35230075 DOI: 10.1021/acsami.2c01630] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Herein, we propose a highly sensitive wireless rehabilitation training ball with a piezoresistive sensor array for patients with Parkinson's disease (PD). The piezoresistive material is a low percolation threshold conductive hydrogel which is formed with polypyrrole (PPy) nanofibers (NFs) as a conductive filler derived from a polydopamine (PDA) template. The proton acid doping effect and molecular template of PDA are essential for endowing PPy NFs with a high aspect ratio, leading to a low percolation threshold (∼0.78 vol %) and a low Young's 004Dodulus of 37.69 kPa and hence easy deformation. The piezoresistive sensor exhibited a static and dynamic stability of 10,000 s and 15,000 cycle times, respectively. This stability could be attributed to the increased hydrophilicity of conductive fillers, enhancing the interfacial strength between the conductive filler and the matrix. The interaction between the PDA-PPy NFs and the hydrogel matrix endows the hydrogel with toughness and ensures the stability of the device. Additionally, the microdome structure of the conductive hydrogel, produced by hot screen-imprinting, dramatically improves the sensitivity of the piezoresistive sensor (∼856.14 kPa-1). The microdome conductive hydrogel can distinguish a subtle pressure of 15.40 Pa compared to the control hydrogel without a microstructure. The highly sensitive piezoresistive sensor has the potential to monitor the hand-grip force, which is not well controlled by patients with PD. The rehabilitation training ball assembled with a sensor array on the surface and a wireless chip for communication inside is built and used to monitor the pressure in real time through the WeChat applet. Thus, this work has significantly broadened the application of hydrogel-based flexible piezoresistive sensors for human activity monitoring, which provides a promising strategy to realize next-generation electronics.
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Affiliation(s)
- Bing Yao
- State Key Lab of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhihao Ye
- School of Computer Science and Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, China
| | - Xiang Lou
- State Key Lab of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - QiLong Yan
- State Key Lab of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - ZheYi Han
- State Key Lab of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - YaBo Dong
- School of Computer Science and Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, China
| | - Shaoxing Qu
- State Key Laboratory of Fluid Power & Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Zhejiang University, Hangzhou 310027, China
| | - Zongrong Wang
- State Key Lab of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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37
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Liu Z, Li S, Zhu J, Mi L, Zheng G. Fabrication of β-Phase-Enriched PVDF Sheets for Self-Powered Piezoelectric Sensing. ACS APPLIED MATERIALS & INTERFACES 2022; 14:11854-11863. [PMID: 35192327 DOI: 10.1021/acsami.2c01611] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The fabrication of self-powered pressure sensors based on piezoelectric materials requires flexible piezoelectric generators produced with a continuous, large-scale, and environmentally friendly approach. In this study, continuous poly(vinylidene fluoride) (PVDF) sheets with a higher β-phase content were facilely fabricated by the melt-extrusion-calendering technique and a PVDF-based piezoelectric generator (PEG) was further assembled. Such a PEG exhibits a remarkable piezoelectric output performance. Moreover, it possesses prominent stability even after working for a long time, exhibiting potential applications for real-time monitoring of various human movements (i.e., hopping, running, and walking) and gait. This work not only provides the possibility of continuous and environmentally friendly fabrication of PVDF sheets with remarkable piezoelectric properties but also paves a new promising pathway for powering portable microelectronic applications without any external power supply.
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Affiliation(s)
- Zhongzhu Liu
- School of Materials and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, P. R. China
| | - Suishui Li
- College of Materials Science and Engineering, Key Laboratory of Material Processing and Mold of Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Jingzhan Zhu
- College of Materials Science and Engineering, Key Laboratory of Material Processing and Mold of Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Liwei Mi
- School of Materials and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, P. R. China
| | - Guoqiang Zheng
- College of Materials Science and Engineering, Key Laboratory of Material Processing and Mold of Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, P. R. China
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38
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Zheng Y, Li X, Ma R, Huang Z, Wang C, Zhu M, Du Y, Chen X, Pan C, Wang B, Wang Y, Peng D. Molten Salt Shielded Synthesis of Monodisperse Layered CaZnOS-Based Semiconductors for Piezophotonic and X-Ray Detection Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107437. [PMID: 35174965 DOI: 10.1002/smll.202107437] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Indexed: 06/14/2023]
Abstract
CaZnOS-based semiconductors are the only series of material system discovered that can simultaneously realize a large number of dopant elements to directly fulfill the highly efficient full-spectrum functionality from ultraviolet to near-infrared under the same force/pressure. Nevertheless, owing to the high agglomeration of the high temperature solid phase manufacturing process, which is unable to control the crystal morphology, the application progress is limited. Here, the authors report first that CaZnOS-based fine monodisperse semiconductor crystals with various doping ions are successfully synthesized by a molten salt shielded method in an air environment. This method does not require inert gas ventilation, and therefore can greatly reduce the synthesis cost and more importantly improve the fine control of the crystal morphology, along with the crystals' dispersibility and stability. These doped semiconductors can not only realize different colors of mechanical-to-optical energy conversion, but also can achieve multicolor luminescence under low-dose X-ray irradiation, moreover their intensities are comparable to the commercial NaI:Tl. They can pave the way to the new fields of advanced optoelectronic applications, such as piezophotonic systems, mechanical energy conversion and harvesting devices, intelligent sensors, and artificial skin as well as X-ray applications.
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Affiliation(s)
- Yuantian Zheng
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Xu Li
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Ronghua Ma
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Zefeng Huang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Chunfeng Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Mingju Zhu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Yangyang Du
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Xian Chen
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Caofeng Pan
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
| | - Bohan Wang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Yu Wang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Dengfeng Peng
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
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Leung CM, Chen X, Wang T, Tang Y, Duan Z, Zhao X, Zhou H, Wang F. Enhanced Electromechanical Response in PVDF-BNBT Composite Nanofibers for Flexible Sensor Applications. MATERIALS 2022; 15:ma15051769. [PMID: 35268999 PMCID: PMC8911346 DOI: 10.3390/ma15051769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/06/2022] [Accepted: 02/21/2022] [Indexed: 11/16/2022]
Abstract
Wearable energy harvesters and sensors have recently attracted significant attention with the rapid development of artificial intelligence and the Internet of Things (IoT). Compared to high-output bulk materials, these wearable devices are mainly fabricated by thin-film-based materials that limit their application. Therefore, the enhancement of output voltage and power for these devices has recently become an urgent topic. In this paper, the lead-free bismuth titanate-barium titanate (0.93(Na0.5Bi0.5)TiO3-0.07BaTiO3(BNBT)) nanoparticles and nanofibers were embedded into the PVDF nanofibers. They produced high inorganic electrical voltage coefficients, high electromechanical coupling coefficients, and environmentally friendly properties that enhance the electromechanical performance of pure PVDF nanofibers, and they are all the critical requirements for modern flexible pressure sensors. In detail, PVDF and PVDF-based composites nanofibers were prepared by electrospinning, and different flexible sandwich composite devices were fabricated by the PDMS encapsulation method. As a result, the six-time enhancement maximum output voltage was obtained in a PVDF-BNBT (fiber)-based composite sensor compared to the pure PVDF one. Our results indicate that the output voltage of the pressure sensors has been significantly enhanced, and the development gate is enabled by analyzing the related physical process and influence mechanism.
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Affiliation(s)
- Chung Ming Leung
- School of Mechanical Engineering and Automation, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
- Correspondence: (C.M.L.); (H.Z.); (F.W.)
| | - Xiaoqiu Chen
- Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China; (X.C.); (T.W.); (Y.T.); (Z.D.); (X.Z.)
| | - Tao Wang
- Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China; (X.C.); (T.W.); (Y.T.); (Z.D.); (X.Z.)
| | - Yanxue Tang
- Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China; (X.C.); (T.W.); (Y.T.); (Z.D.); (X.Z.)
| | - Zhihua Duan
- Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China; (X.C.); (T.W.); (Y.T.); (Z.D.); (X.Z.)
| | - Xiangyong Zhao
- Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China; (X.C.); (T.W.); (Y.T.); (Z.D.); (X.Z.)
| | - Helezi Zhou
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
- Correspondence: (C.M.L.); (H.Z.); (F.W.)
| | - Feifei Wang
- Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China; (X.C.); (T.W.); (Y.T.); (Z.D.); (X.Z.)
- Correspondence: (C.M.L.); (H.Z.); (F.W.)
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40
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Jiang Z, Tan X, Huang Y. Piezoelectric effect enhanced photocatalysis in environmental remediation: State-of-the-art techniques and future scenarios. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150924. [PMID: 34655628 DOI: 10.1016/j.scitotenv.2021.150924] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/05/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
Photocatalysis has been widely used as an advanced oxidation process to control pollutants effectively. However, environmental photocatalysis' decontamination efficiency is restricted to the photogenerated electron-hole pairs' rapid recombination. Recently, emerging investigations have been directed to generate internal electric field by piezoelectric effect to enhance the separation efficiency of photogenerated charge carriers for better photocatalytic performance; however, there are still huge knowledge gaps on the rational application of piezo-photocatalysis in environmental remediation and disinfection. Thus, we have conducted a comprehensive review to better understand the physicochemical properties of piezoelectric materials (non-centrosymmetric crystal structures, piezoelectric coefficient, Young's modulus, and etc.) and current study states. We also elucidated the strategy of piezo-photo catalysis system constructions (mono-component, core-shell structure, and etc.) and underlying mechanisms of enhanced remediation performance. Addressing the current challenges and future scenarios (degradation of organic pollutants, disinfection, and etc.), the present review would shed light on the advanced wastewater treatment development towards sustainable control of emerging containments.
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Affiliation(s)
- Zhenying Jiang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen 518055, China
| | - Xianjun Tan
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen 518055, China
| | - Yuxiong Huang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen 518055, China.
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41
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Luo Y, Chen X, Tian H, Li X, Lu Y, Liu Y, Shao J. Gecko-Inspired Slant Hierarchical Microstructure-Based Ultrasensitive Iontronic Pressure Sensor for Intelligent Interaction. RESEARCH (WASHINGTON, D.C.) 2022; 2022:9852138. [PMID: 35935142 PMCID: PMC9275085 DOI: 10.34133/2022/9852138] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 05/23/2022] [Indexed: 12/11/2022]
Abstract
Highly sensitive flexible pressure sensors play an important role to ensure the safety and friendliness during the human-robot interaction process. Microengineering the active layer has been shown to improve performance of pressure sensors. However, the current structural strategy almost relying on axial compression deformation suffers structural stiffening, and together with the limited area growth efficiency of conformal interface, essentially limiting the maximum sensitivity. Here, inspired by the interface contact behavior of gecko's feet, we design a slant hierarchical microstructure to act as an electrode contacting with an ionic gel layer, fundamentally eliminating the pressure resistance and maximizing functional interface expansion to achieving ultrasensitive sensitivity. Such a structuring strategy dramatically improves the relative capacitance change both in the low- and high-pressure region, thereby boosting the sensitivity up to 36000 kPa-1 and effective measurement range up to 300 kPa. To verify the advantages of high sensitivity, the sensor is integrated with a soft magnetic robot to demonstrate a biomimetic Venus flytrap. The ability to perceive weak stimuli allows the sensor to be used as a sensory and feedback window, realizing the capture of small live insects and the transportation of fragile objects.
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Affiliation(s)
- Yongsong Luo
- Micro- and Nano-Technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xiaoliang Chen
- Micro- and Nano-Technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an 710049, China
| | - Hongmiao Tian
- Micro- and Nano-Technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xiangming Li
- Micro- and Nano-Technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yangtianyu Lu
- Micro- and Nano-Technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yang Liu
- Micro- and Nano-Technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jinyou Shao
- Micro- and Nano-Technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an 710049, China
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42
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Liu S, Wang W, Xu W, Liu L, Zhang W, Song K, Chen X. Continuous Three-Dimensional Printing of Architected Piezoelectric Sensors in Minutes. RESEARCH (WASHINGTON, D.C.) 2022; 2022:9790307. [PMID: 35935134 PMCID: PMC9318352 DOI: 10.34133/2022/9790307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 06/11/2022] [Indexed: 11/06/2022]
Abstract
Additive manufacturing (AM), also known as three-dimensional (3D) printing, is thriving as an effective and robust method in fabricating architected piezoelectric structures, yet most of the commonly adopted printing techniques often face the inherent speed-accuracy trade-off, limiting their speed in manufacturing sophisticated parts containing micro-/nanoscale features. Herein, stabilized, photo-curable resins comprising chemically functionalized piezoelectric nanoparticles (PiezoNPs) were formulated, from which microscale architected 3D piezoelectric structures were printed continuously via micro continuous liquid interface production (μCLIP) at speeds of up to ~60 μm s-1, which are more than 10 times faster than the previously reported stereolithography-based works. The 3D-printed functionalized barium titanate (f-BTO) composites reveal a bulk piezoelectric charge constant d 33 of 27.70 pC N-1 with the 30 wt% f-BTO. Moreover, rationally designed lattice structures that manifested enhanced, tailorable piezoelectric sensing performance as well as mechanical flexibility were tested and explored in diverse flexible and wearable self-powered sensing applications, e.g., motion recognition and respiratory monitoring.
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Affiliation(s)
- Siying Liu
- School of Manufacturing Systems and Networks, Arizona State University, Mesa, AZ 85212, USA
- The Polytechnic School, Arizona State University, Mesa, AZ 85212, USA
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ 85287, USA
| | - Wenbo Wang
- School of Manufacturing Systems and Networks, Arizona State University, Mesa, AZ 85212, USA
- The Polytechnic School, Arizona State University, Mesa, AZ 85212, USA
| | - Weiheng Xu
- School of Manufacturing Systems and Networks, Arizona State University, Mesa, AZ 85212, USA
- The Polytechnic School, Arizona State University, Mesa, AZ 85212, USA
| | - Luyang Liu
- School of Manufacturing Systems and Networks, Arizona State University, Mesa, AZ 85212, USA
- The Polytechnic School, Arizona State University, Mesa, AZ 85212, USA
| | - Wenlong Zhang
- School of Manufacturing Systems and Networks, Arizona State University, Mesa, AZ 85212, USA
- The Polytechnic School, Arizona State University, Mesa, AZ 85212, USA
| | - Kenan Song
- School of Manufacturing Systems and Networks, Arizona State University, Mesa, AZ 85212, USA
- The Polytechnic School, Arizona State University, Mesa, AZ 85212, USA
| | - Xiangfan Chen
- School of Manufacturing Systems and Networks, Arizona State University, Mesa, AZ 85212, USA
- The Polytechnic School, Arizona State University, Mesa, AZ 85212, USA
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43
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Liu M, Liang J, Tian Y, Liu Z. Post-synthetic modification within MOFs: a valuable strategy for modulating their ferroelectric performance. CrystEngComm 2022. [DOI: 10.1039/d1ce01567b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It is a great route designing new MOF ferroelectrics to enrich the scope of ferroelectrics or improving the ferroelectric performance to enhance the opportunity of applications through the strategy of post-synthetic modification (PSM).
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Affiliation(s)
- Meiying Liu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P.R. China
| | - Jingjing Liang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P.R. China
| | - Yadong Tian
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P.R. China
| | - Zhiliang Liu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P.R. China
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Nguyen TD, Lee JS. Recent Development of Flexible Tactile Sensors and Their Applications. SENSORS (BASEL, SWITZERLAND) 2021; 22:s22010050. [PMID: 35009588 PMCID: PMC8747637 DOI: 10.3390/s22010050] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/10/2021] [Accepted: 12/20/2021] [Indexed: 05/15/2023]
Abstract
With the rapid development of society in recent decades, the wearable sensor has attracted attention for motion-based health care and artificial applications. However, there are still many limitations to applying them in real life, particularly the inconvenience that comes from their large size and non-flexible systems. To solve these problems, flexible small-sized sensors that use body motion as a stimulus are studied to directly collect more accurate and diverse signals. In particular, tactile sensors are applied directly on the skin and provide input signals of motion change for the flexible reading device. This review provides information about different types of tactile sensors and their working mechanisms that are piezoresistive, piezocapacitive, piezoelectric, and triboelectric. Moreover, this review presents not only the applications of the tactile sensor in motion sensing and health care monitoring, but also their contributions in the field of artificial intelligence in recent years. Other applications, such as human behavior studies, are also suggested.
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Affiliation(s)
| | - Jun Seop Lee
- Correspondence: ; Tel.: +82-31-750-5814; Fax: +82-31-750-5389
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Dai J, Li L, Shi B, Li Z. Recent progress of self-powered respiration monitoring systems. Biosens Bioelectron 2021; 194:113609. [PMID: 34509719 DOI: 10.1016/j.bios.2021.113609] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/26/2021] [Accepted: 08/31/2021] [Indexed: 11/15/2022]
Abstract
Wearable and implantable medical devices are playing more and more key roles in disease diagnosis and health management. Various biosensors and systems have been used for respiration monitoring. Among them, self-powered sensors have some special characteristics such as low-cost, easy preparation, highly designable, and diversified. The respiratory airflow can drive the self-powered sensors directly to convert mechanical energy of the airflow into electricity. One of the major goals of the self-powered sensors and systems is realizing health monitoring and diagnosis. The relationship between the output signals and the models of respiratory diseases has not been studied deeply and clearly. Therefore, how to find an accurate relationship between them is a challenging and significant research topic. This review summarized the recent progress of the self-powered respiratory sensors and systems from aspects of device principle, output property, detecting index and so on. The challenges and perspectives have also been discussed for reference to the researchers who are interested in the field of self-powered sensors.
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Affiliation(s)
- Jieyu Dai
- College of Chemistry and Chemical Engineering, Center on Nanoenergy Research, Guangxi University, 530004, Nanning, China; Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 101400, Beijing, China
| | - Linlin Li
- College of Chemistry and Chemical Engineering, Center on Nanoenergy Research, Guangxi University, 530004, Nanning, China; Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 101400, Beijing, China
| | - Bojing Shi
- Beijing Advanced Innovation Centre for Biomedical Engineering, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China.
| | - Zhou Li
- College of Chemistry and Chemical Engineering, Center on Nanoenergy Research, Guangxi University, 530004, Nanning, China; Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, 101400, Beijing, China.
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46
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Derda T, Domanski Z. Survivability of Suddenly Loaded Arrays of Micropillars. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7173. [PMID: 34885328 PMCID: PMC8658342 DOI: 10.3390/ma14237173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 11/21/2022]
Abstract
When a multicomponent system is suddenly loaded, its capability of bearing the load depends not only on the strength of components but also on how a load released by a failed component is distributed among the remaining intact ones. Specifically, we consider an array of pillars which are located on a flat substrate and subjected to an impulsive and compressive load. Immediately after the loading, the pillars whose strengths are below the load magnitude crash. Then, loads released by these crashed pillars are transferred to and assimilated by the intact ones according to a load-sharing rule which reflects the mechanical properties of the pillars and the substrate. A sequence of bursts involving crashes and load transfers either destroys all the pillars or drives the array to a stable configuration when a smaller number of pillars sustain the applied load. By employing a fibre bundle model framework, we numerically study how the array integrity depends on sudden loading amplitudes, randomly distributed pillar strength thresholds and varying ranges of load transfer. Based on the simulation, we estimate the survivability of arrays of pillars defined as the probability of sustaining the applied load despite numerous damaged pillars. It is found that the resulting survival functions are accurately fitted by the family of complementary cumulative skew-normal distributions.
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Affiliation(s)
- Tomasz Derda
- Department of Mathematics, Czestochowa University of Technology, PL-42-201 Czestochowa, Poland;
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Pyo S, Lee J, Bae K, Sim S, Kim J. Recent Progress in Flexible Tactile Sensors for Human-Interactive Systems: From Sensors to Advanced Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005902. [PMID: 33887803 DOI: 10.1002/adma.202005902] [Citation(s) in RCA: 91] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 11/07/2020] [Indexed: 05/27/2023]
Abstract
Flexible tactile sensors capable of measuring mechanical stimuli via physical contact have attracted significant attention in the field of human-interactive systems. The utilization of tactile information can complement vision and/or sound interaction and provide new functionalities. Recent advancements in micro/nanotechnology, material science, and information technology have resulted in the development of high-performance tactile sensors that reach and even surpass the tactile sensing ability of human skin. Here, important advances in flexible tactile sensors over recent years are summarized, from sensor designs to system-level applications. This review focuses on the representative strategies based on design and material configurations for improving key performance parameters including sensitivity, detection range/linearity, response time/hysteresis, spatial resolution/crosstalk, multidirectional force detection, and insensitivity to other stimuli. System-level integration for practical applications beyond conceptual prototypes and promising applications, such as artificial electronic skin for robotics and prosthetics, wearable controllers for electronics, and bidirectional communication tools, are also discussed. Finally, perspectives on issues regarding further advances are provided.
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Affiliation(s)
- Soonjae Pyo
- Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea
| | - Jaeyong Lee
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Kyubin Bae
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Sangjun Sim
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Jongbaeg Kim
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
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Wang Y, Zhu L, Du C. Progress in Piezoelectric Nanogenerators Based on PVDF Composite Films. MICROMACHINES 2021; 12:mi12111278. [PMID: 34832688 PMCID: PMC8624520 DOI: 10.3390/mi12111278] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/14/2021] [Accepted: 10/16/2021] [Indexed: 11/16/2022]
Abstract
In recent years, great progress has been made in the field of energy harvesting to satisfy increasing needs for portable, sustainable, and renewable energy. Among piezoelectric materials, poly(vinylidene fluoride) (PVDF) and its copolymers are the most promising materials for piezoelectric nanogenerators (PENGs) due to their unique electroactivity, high flexibility, good machinability, and long–term stability. So far, PVDF–based PENGs have made remarkable progress. In this paper, the effects of the existence of various nanofillers, including organic–inorganic lead halide perovskites, inorganic lead halide perovskites, perovskite–type oxides, semiconductor piezoelectric materials, two–dimensional layered materials, and ions, in PVDF and its copolymer structure on their piezoelectric response and energy–harvesting properties are reviewed. This review will enable researchers to understand the piezoelectric mechanisms of the PVDF–based composite–film PENGs, so as to effectively convert environmental mechanical stimulus into electrical energy, and finally realize self–powered sensors or high–performance power sources for electronic devices.
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Affiliation(s)
- Yuan Wang
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China;
| | - Laipan Zhu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
- Correspondence: (L.Z.); (C.D.)
| | - Cuifeng Du
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China;
- Correspondence: (L.Z.); (C.D.)
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Yang TC, Jiang YP, Lin TH, Chen SH, Ho CM, Wu MC, Wang JC. N-butylamine-modified graphite nanoflakes blended in ferroelectric P(VDF-TrFE) copolymers for piezoelectric nanogenerators with high power generation efficiency. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wu Q, Guo J, Nie M, Wang Q. High-Efficiency Poly(vinylidene fluoride)-Based Piezoelectric Energy Harvester Based on Crystalline Manipulation during Microinjection. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qi Wu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Jiajun Guo
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Min Nie
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Qi Wang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
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