BIOSENSORS & BIOELECTRONICS
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2025
·
IF 10.5
Tao Jing,Yaolei Zhang,Zhongtao Li,Xinyu Tao,Xiong Xiong,Chaoming Xie,Weili Deng,Feng Lin,Hongyu Sun,Shuxin Qu
Monitoring cardiac rhythm is crucial for diagnosis of heart failure. However, the deficient sensitivity of polyvinylidene fluoride (PVDF) sensors impede their application in monitoring of cardiac rhythm due to the limited piezoelectricity. Here, doping of CoFe 2 O 4 and aligning fibers were jointly adopted to enhance the piezoelectricity of PVDF, attributed to the transformation of α-PVDF to β-PVDF from 51.54 to 82.36 % confirmed by FTIR and First Principles simulation. Then the higher sensitivity piezoelectric sensors were developed based on aligned PVDF/CoFe 2 O 4 accompanying with the superior frequency characteristics, rapid response, endurance stability, permeability and self-cleaning capabilities, compared to that of random PVDF/CoFe 2 O 4 and PVDF sensors, which were 17.28, 13.40 and 2.16 mV kPa −1 , respectively. Thus, the sensitivity of PVDF/CoFe 2 O 4 sensors was sufficient to distinguish the variations of cardiac rhythm or arrhythmia of the established and verified heart failure rat model, including amplitude, cycle and frequency. The notable characteristic of an evolving heart failure was the significantly decreased amplitude initially, followed by a dramatic drop in the cycles of cardiac impulse. Hence, this non-invasive method is promise in providing valuable warning signs for predicting heart failure based on aligned PVDF/CoFe 2 O 4 sensors, as well as in the prevention its occurrence.
研究领域:
生物医学工程
·
心血管疾病
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Kai Fu,Ping Huang,Shunjian Xu,Lei Liu,Xuewen Huang,Jun Luo,Yulin Li,Huilan Yu,Haiyan Fu,Hui Ou
Incorporating porous structures into flexible piezoelectric materials has proven to be an effective strategy to enhance the output performance, but the fabrication processes are often intricate or environmentally harmful. In this study, natural sucrose with substantial hydroxyl groups was firstly introduced into polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) as a phase formation inducer, and subsequently removed by the dissolution of water as a pore formation agent, yielding a regular porous structure. Furthermore, porosity of the PVDF-HFP film could be simply modulated by adjusting the mass ratio of sucrose to PVDF-HFP. At low porosity levels, the dielectric constant of PVDF-HFP decreased with the increase of porosity, reaching the minimum at the critical threshold porosity of 38.8 %. Owing to the increased β-phase content and the decreased dielectric constant, the sensitivity of the porous PVDF-HFP film based piezoelectric sensor was tripled to 117 mV/N, which held promise for detecting tactile and slip signals in mechanical arms.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2015
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IF 6.409
Zheng-peng Yang,Xuan Liu,Chun-jing Zhang,Bao-zhong Liu
Transparent photocatalytic surfaces are of ever increasing importance for the enhancement of the photocatalytic efficiency. Here, the highly ordered transparent TiO 2 nanotube arrays were prepared by the anodization and thermal annealing of titanium layer deposited onto the glass substrate , and a novel nonenzymatic piezoelectric sensor was developed for urea detection based on the modification of molecularly imprinted TiO 2 thin film onto transparent TiO 2 nanotube arrays. The performance of the fabricated sensor was evaluated and the results indicated that the sensor exhibited high sensitivity in urea detection, with a linear range from 0.04 to 120 μM and a limit of detection of 0.01 μM. Moreover, the sensor presented outstanding selectivity while used in coexisting systems containing various interferents with high concentration. The analytical application of the urea sensor confirmed the feasibility of urea detection in urine sample.
研究领域:
生物传感技术
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材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 12
·6713
·
IF 4.9
Jihong Wang,Zhening Fang,Wenhao Liu,Liuyuan Zhu,Qiubo Pan,Zhen Gu,Huifeng Wang,Yingying Huang,Haiping Fang
Self-powered wearable pressure sensors based on flexible electronics have emerged as a new trend due to the increasing demand for intelligent and portable devices. Improvements in pressure-sensing performance, including in the output voltage, sensitivity and response time, can greatly expand their related applications; however, this remains challenging. Here, we report on a highly sensitive piezoelectric sensor with novel light-boosting pressure-sensing performance, based on a composite membrane of copper phthalocyanine (CuPC) and graphene oxide (GO) (CuPC@GO). Under light illumination, the CuPC@GO piezoelectric sensor demonstrates a remarkable increase in output voltage (381.17 mV, 50 kPa) and sensitivity (116.80 mV/kPa, <5 kPa), which are approximately twice and three times of that the sensor without light illumination, respectively. Furthermore, light exposure significantly improves the response speed of the sensor with a response time of 38.04 µs and recovery time of 58.48 µs, while maintaining excellent mechanical stability even after 2000 cycles. Density functional theory calculations reveal that increased electron transfer from graphene to CuPC can occur when the CuPC is in the excited state, which indicates that the light illumination promotes the electron excitation of CuPC, and thus brings about the high polarization of the sensor. Importantly, these sensors exhibit universal spatial non-contact adjustability, highlighting their versatility and applicability in various settings.
研究领域:
材料科学
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传感器技术
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电子工程
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2024
·Vol. 9
·期 12
·2400386
·
IF 6.4
Zifeng He,Yijie Liu,Ivan S. Babichuk,Zisen Zhou,Zhaohua Liu,Xiongbang Yang,Ruiliang Zhou,Yan Pu,Shuhao Li,Yu Chang,Terry Tao Ye,Zhaoli Gao,Jian Yang
Cough is a common symptom of various respiratory diseases. However, recognizing a subject's cough using acoustic imaging can be challenging due to the complexity of coughing and the vulnerability of acoustic acquisition to external interference. This research aims to address these issues by utilizing a flexible piezoelectric ionic liquid-doped poly(L-lactic acid) (PLLA) sensor to gather the pressure signals from the human surface. 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl)imide ([BMIm]TFSI) ionic liquid (IL) can enhance the piezoelectric performance of PLLA thin film, the corresponding output voltage, and impact sensitivity are improved to three times and 105.1% for the PLLA/IL thin film with 1 wt% IL, 140 °C annealing 2 h and four times drawing ratio. The effect of IL on the crystallization behavior and piezoelectric properties of thin films during their preparation is investigated. The flexible PLLA/IL sensor is integrated into a wearable electronic system which collects and transmits piezoelectric signals from cough-induced vibrations to the filter for denoising, then the acquired cough data are decomposed using the Empirical Mode Decomposition method and trained in a multi-layer perception model to detect human coughing. It's evident that the flexible piezoelectric PLLA/IL sensors can be applied to human coughing recognition and show great potential applications in intelligent healthcare.
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Yijun Fu,Chaowei Li,Yue Cheng,Yaling He,Wei Zhang,Qufu Wei,Dawei Li
Biomass aerogel materials are increasingly attracting researchers’ attention because of good biocompatibility of biomass materials and multiple functional features of aerogel materials. Herein, novel biomass aerogel composite was fabricated by doping hydroxylated barium titanate (BT-OH) nanoparticles and MXene in chitosan/bacterial cellulose (CB) aerogel by simple methods containing chemical modification, physical mixture and lyophilization. The novel aerogel composite named CB/BT-OH/MXene showed favorable piezoelectric properties and excellent photothermal antibacterial properties. The aerogel composite-based piezoelectric sensor displayed short response time (0.4 s), high response sensitivity (800 mV/N), and long cycle stability (over 1000 cycles), which could monitor various body movements, including fingers bending, speaking, wrist bending, elbow bending, smiling, and walking. Moreover, the aerogel composite possessed satisfactory photothermal conversion ability, which could reach 55 ℃ by 10 s of near-infrared irradiation (808 nm, 0.2 W/cm 2 ), successfully achieving complete sterilization effect towards S. aureus and E. coli . The novel biomass aerogel composite may find its potential applications in wearable or implantable self-powered sensors with satisfactory antibacterial performance.
研究领域:
材料科学
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生物医学工程
·
纳米技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yan Zhong,Jiaqi Wang,Longgang Wu,Kunshan Liu,Shengping Dai,Jing Hua,Guanggui Cheng,Jianning Ding
A microstructured surface has been applied in self-powered triboelectric pressure sensors to increase the charge-carrying sites and enhance the output performance. However, the microstructure increases the distance between the electrode and the triboelectric layer, and its influence on the output performance is unknown. Herein, we proposed a dome-conformal electrode strategy for a self-powered triboelectric nanogenerator (TENG) pressure sensor. With a simple reverse-dome adsorption process, an ultrathin triboelectric layer and Ag electrode can be made conformal to the dome PDMS structure. The TENG sensor is constructed with paper as a positive triboelectric layer. Compared with the device based on nonconformal structure, the conformal design strategy endows the device with a faster charge transfer and enhanced output voltage. By doping with BaTiO3, the outermost triboelectric layer can be easily modified to improve its ability of sustaining charge, and an ultrathin PDMS layer is coated on the triboelectric layer to expand the triboelectric polarity difference between two triboelectric layers so as to enhance the output voltage. The synergistic effects enable the optimized TENG sensor with a sensitivity of 0.75 V/kPa in the low-pressure region (0–26 kPa) and 0.19 V/kPa in the high-pressure range (26–120 kPa). Its application in human motion detection, grabbing water beakers, and noncontact distance testing has been demonstrated. This work provides a route such as a conformal structure design strategy to enhance the output performance of a microstructure-based TENG sensor.
研究领域:
材料科学
·
传感器技术
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DOI
PubMed
高影响因子
Nano Energy
·
2022
·
IF 19.069
Peiru Zhou,Zhipeng Zheng,Binquan Wang,Yiping Guo
Hardness or brittleness limits the broad applications of currently available high-performance piezoelectric sensors in emerging fields like human-machine interface and wearable electronics , while existing technologies for fabricating flexible piezoelectric sensors often require high-temperature sintering or complex processes. Here, we reported flexible piezoelectric sensors based on 10 nm BaTiO 3 nanocubes self-assembled on glass fiber fabric (GFF). The simple self-assembly process avoids high temperature sintering process which can well maintain the mechanical performance of GFF. Owing to the superior piezoelectric performance of BaTiO 3 nanocubes and robust mechanical properties of GFF, the integrally fabricated flexible piezoelectric sensors achieved high sensitivity (101.09 nA kPa −1 and 3.31 V kPa −1 in the low pressure range of 0–10 N) and short response time (19 ms). The sensors can intelligently identify handwriting or recognize the user of keyboard, and the initially collected electrical signals are essentially the same as those after 3000 bending cycles. This work provides a novel self-assembly process to develop fabric-based flexible electronics, which promotes the development of self-powered piezoelectric sensors and creates advancements in human-machine interfaces.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Jiawei Zhao,Qiao Hu,Tongqiang Fu,Haiyang Liu,Yuanji Yao,Wenzhe Zhou,Zicai Zhu
Hydrophones play a crucial role in underwater target detection within sonar systems. However, existing hydrophones often encounter challenges such as low sensitivity and poor signal-to-noise ratio (SNR) in the detection of low-frequency acoustic signals. This work introduces a capacitive hydrophone (CH) designed for highly sensitive detection of low-frequency underwater sound signals. Comprising a latex film/silver electrode and a structured hydrogel as the electrolyte layer, the CH is enclosed in a cylindrical casing. By strategically integrating a carbon nanotube (CNT) topology network within a pyramid microarray in the hydrogel, the sensor efficiently forms the electric double layer (EDL), enhancing sensitivity and precision. The CH showcases exceptional low-pressure sensitivity across a wide frequency spectrum (20 to 800 Hz), achieving a receiving sensitivity of up to −159.7 dB in the critical low-frequency band (20 to 125 Hz), surpassing the performance of the commercial hydrophone (RHC-14) by a substantial margin of 33.29 dB. Furthermore, the CH maintains a superior SNR, enabling the detection of sound waves as faint as 0.3 Pa. This study demonstrates the capabilities of the CH in detecting maritime vessels and underwater sounds, underscoring the potential of the CNT-enhanced EDL sensing mechanism for future low-frequency hydrophone design.
研究领域:
材料科学
·
海洋工程
·
传感器技术
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产品关联
DOI
PubMed
高影响因子
SENSORS
·
2021
·Vol. 21
·期 2
·350
·
IF 3.576
Yaning Zhang,Zhihui Li,Xiaotong Guo,Guangzhou Liu,Shuyong Zhang
A new potentiometric sensor based on modified carbon paste electrode (CPE) was prepared for the sensitive and selective detection of total residual chlorine (TRC) in simulated electrolytically-treated ballast water (BW). The modified CPE was prepared using ferrocene (Fc) as the sensing species and paraffin oil as the binder. It is revealed that the addition of Fc can significantly shorten the response time and improve the reproducibility, selectivity, and stability of the sensor. The open circuit potential of the Fc-CPE is in linear proportion to the logarithm of TRC within the TRC concentration range from 1 mg∙dm−3to 15 mg∙dm−3. In addition, the Fc-CPE sensor exhibits good selectivity to TRC over a wide concentration range of the possible co-exiting interference ions in seawater. The Fc-CPE electrode can be used as a convenient and reliable sensor for the continuous monitoring of TRC during the electrolytic treatment of BW.Keywords:ballast water;electrolytic treatment;carbon paste electrode;total residual chlorine;potentiometric sensor
研究领域:
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Jie Li,Bing Xie,Kai Xia,Chunmao Zhao,Yingchun Li,Dong Li,Jing Han
Novel cross-linked chitosan quaternary ammonium salt (CHACC) membranes were successfully prepared by the reaction of chitosan quaternary ammonium salt (HACC) and epichlorohydrin. The structures and morphologies of the CHACC membranes were characterized. The water stability and antibacterial efficiency of CHACC membranes were investigated by the equilibrium swelling method, the plate count method and minimum inhibitory concentration (MIC) test, respectively. Further, an antibacterial piezoelectric sensor with a multilayered structure was prepared by attaching the CHACC membrane to a poly(vinylidenefluoride‑ co ‑trifluoroethylene) (PVDF-TrFE) based sensor. The piezoelectrical properties of PVDF-TrFE based sensors coated with CHACC were investigated. The results showed that the CHACC-4 with a three-dimensional network structure exhibited best water stability (193% of swelling degree) and antibacterial properties (antibacterial rate > 99%), and the MIC of CHACC against E. coli , S. aureus and P. aeruginosa was 40, 320 and 640 μg/mL, respectively. Additionally, the coating of CHACC-4 had no adverse effect on the piezoelectric properties of the prepared sensor. The fabricated multilayer sensor has potential applications in the field of wearable devices.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 15
·2200114
·
IF 15.153
Lirong He,Jin Lu,Cheng Han,Xingang Liu,Jingfeng Liu,Chuhong Zhang
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.
研究领域:
材料科学
·
电子工程
·
先进制造
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）