Materials Today Physics
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2024
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IF 10
Yangfan Liu,Changliu He,Jiahao Fang,Jian Zhou,Kedong Shang,Xiaobo Pu,Linmao Qian,Tingting Yang
Developing simple device configurations to satisfy independent thermal and force sensing is critical for improving the recognition and manipulation capabilities of robotic hands on objects, but it remains a challenge. In this paper, through the composition adjustment of polyvinyl alcohol, KOH, nano-silica, glycerin, and the microporous structure design, the prepared ionic hydrogel sensor has promising comprehensive performance. It shows thermal sensitivity (−0.47 % °C −1 , 0–20 °C; −0.24 % °C −1 , 20–50 °C), pressure sensitivity (1 kPa −1 , 0–300 kPa), pressure detection limit of 1 Pa, and mechanical durability (1000 compression fatigue cycles at 100 kPa). More importantly, the pressure-sensitive and thermal-sensitive properties hardly interfere with each other due to the ionic hydrogel network's synergy of excellent water retention, anti-freezing properties and heat insulation ability. The multifunctional tactile sensor is integrated into a robot hand to obtain force and thermal information of the measured object, and combined with machine learning algorithms to realize object recognition. The proposed sensing scheme has been applied to 6 kinds of fruit and vegetable classification tasks in a cold chain logistics scenario, showing a classification accuracy of 95 %.
研究领域:
材料科学
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机器人学
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机器学习
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2021
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IF 3.407
Zhiqiang Gao,Bing Ren,Zhaozhou Fang,Huiqiang Kang,Jing Han,Jie Li
The application of flexible wearable sensors in the grasping process of robot hand can recognize the contour, soft and hard, material, surface temperature and other information of the grasping object, which can effectively improve the intelligent level of the robot. In this work, a method of object contour recognition is proposed by combining the flexible PVDF polymer piezoelectric sensor and high conductivity hydrogel piezoresistive sensor aiming at the problem of profile recognition for objects of the same or similar material. The response of flexible piezoresistive sensor to the static strain is used to sense the angular displacement of robot fingers, and then the shape and size of the object is recognized indirectly. At the same time, the flexible piezoelectric sensor is used as the fingertip tactile sensor to reflect the surface morphology of the object through the dynamic strain information when touching the object. In the whole process of grasping the object, the dual-mode strain information is fully used to realize the recognition of the shape, size and surface morphology of the object. Combining these information, the accurate recognition of the object contour can be further realized. In the experiments, six objects with different shape and four objects with different surface morphology are recognized to verify the feasibility of piezoresistive sensors and piezoelectric sensors respectively. In a comprehensive experiment, eight objects made of the same rubber material with different shape, size and surface morphology are recognized, and the average recognition rate is about 84%, which shows good classification advantages for the objects with similar shape, size and material.
研究领域:
智能机器人
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传感器技术
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
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2020
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IF 7.333
Mufang Li,Jiaxin Chen,Weibing Zhong,Mengying Luo,Wen Wang,Xing Qing,Ying Lu,Qiongzhen Liu,Ke Liu,Yuedan Wang,Dong Wang
The rapid development of wearable devices puts forward higher requirements for mass-produced integrated smart systems that incorporate multiple electric components, such as energy supplying, multisensing, and communicating. To synchronously realize continuously self-powering, multifunctional sensing, distinguish signals from different stimuli, and productively design and fabricate a large-area sensing array, an all-fabric-based self-powered pressure–temperature-sensing electronic skin (e-skin) was prepared in this study by assembling highly flexible and compressible 3D spacer fabric (SF) and the thermoelectric poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (PEDOT:PSS). The all-fabric-based e-skin can efficiently and accurately sense the temperature with a detection resolution of 0.1 K and a response time of 1 s, as well as pressure within a wide range of 200 Pa to 200 kPa and a fast response time of 80 ms. The electricity necessary for driving the sensor can be provided by the temperature difference between the body and environment. Notably, independent voltage and current signals can be generated and read out under the simultaneous temperature–pressure stimuli. For the first time, a real waistcoat-like e-skin with electricity-generating and pressure–temperature-sensing functions on the whole area was designed and prepared by a simple and easy to scale-up production method. All of these features make the developed all-fabric self-powered sensor have very promising applications.
研究领域:
材料科学
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传感器技术
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可穿戴设备
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Jianqiang Gao,Hongsen Niu,Yuanyue Li,Yang Li
Single-mode sensors suffer from poor robustness and insufficient data features in facial expression recognition, so fusing multi-sensor signals is the key to improving the accuracy of expression recognition systems. Here, a biocompatible capacitive-electromyographic dual-mode sensor (CEDS) is presented, consisting of a capacitive pressure sensing unit and dry electrodes for electrophysiological signal monitoring, assembled in a 3D stacking fashion. A double-coupled microstructure is prepared and the electrical double-layer effect is realized by doping ionic liquid, which significantly improves the capacitive performance of the sensor. The application of dry electrodes effectively solves the problems of hydrogel electrodes that are prone to water loss and skin irritation. Besides, the good biocompatibility and antimicrobial properties of CEDS are verified through cytotoxicity and bacteriostatic tests. Based on the sensing of a single signal, a fatigue driving monitoring system and a manipulator control system are constructed respectively. By further integrating the capacitive and electrophysiological signal monitoring functions of CEDS, a 1D convolutional neural network-assisted facial expression recognition system is constructed, which effectively improves the accuracy of expression recognition and demonstrates the great potential of facial expression monitoring systems based on flexible sensor technology in practical applications.
研究领域:
生物医学工程
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机器学习
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yanhao Wu,Xiujuan Feng,Ronggang Lin,Long-Biao Huang,Jizhong Chen,Zhi-Chao Yan
Flexible sensors with versatile sensations and self-powered functions have received increasing attention. However, it is still a challenge to simultaneously integrate multiresponse property with other functionalities in a facile and sustainable way. Herein, we prepared a robust and stretchable composite by polymerizing acrylic acid (AAc) and a triblock copolymeric cross-linking agent, Pluronic F127 diacrylate (F127DA), with lithium as the conductive ion. A dual cross-linking single network, containing both the physical cross-linking site assembled by oxypropylene segments on F127DA and the covalently bonded chemical cross-linking point, was constructed, which, together with synergistic hydrogen bonding between AAc and oxyethylene segments, accounts for the mechanically robust (∼8 MPa in tensile strength), highly stretchable (∼1000% elongation at break), and highly transparent properties. The high conductivity of about 10–4 S/cm is attributed to both the oxyethylene segments on F127DA and the residual bound water on network, with the latter also accounting for the antifreezing properties. The simultaneous strain and humidity sensor were developed based on this skin-like ionoelastomer, and the application in triboelectric nanogenerator further expands the material’s horizon to energy harvesting and makes it self-powered.
研究领域:
材料科学
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柔性电子
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能源 harvesting
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
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IF 2.88
Hao Fang,Peng-Cheng Huang,Fang-Ying Wu
In this work, a simple and easily synthesized Schiff-based derivative colorimetric and fluorescent sensor ( 1 ), 4-dimethylamino-benzoic acid (2-imidazole formaldehyde)-hydrazide, was obtained for the detection of Cu 2+ and S 2− . The compound 1 exhibited dual spectral responses to Cu 2+ , that is, vivid color change and fluorescence enhancement in the presence of Cu 2+ . The detection limits were valued as 0.46 μM and 15 nM according to absorption and fluorescent response, respectively. Both of them are below the World Health Organization (WHO) guidelines for drinking water (31.5 μM). In addition, the ensemble ( 1-Cu 2+ ) selectively and sensitively detected a low concentration of S 2− . As the addition of S 2− instantly removed Cu 2+ from the ensemble ( 1-Cu 2+ ) resulting in a color change from yellow to colorless and a “turn-off” fluorescent response. The detection limit for S 2− was estimated as 0.12 μM (from fluorescent method) and 0.68 μM (from absorption method), respectively, each of which was also lower than the maximum allowable level of S 2− (15 μM) in drinking water defined by the WHO. The binding process was confirmed via UV–vis absorption, fluorescence measurements, 1 H NMR, mass spectroscopy and density functional theory calculation. What's more, successful practical application of test paper is used to inspect the S 2− which means the convenient and rapid assay in real samples can be achieved.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2017
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IF 3.012
Weiwei Mao,Bin Cai,Zhizhen Ye,Jingyun Huang
Hydrogen peroxide (H 2 O 2 ) is an important messenger molecule in vivo. The next generation sensor demands for intelligence and integration. Three-dimensional nanosheet structure is of considerable interest for the development of highly stable and sensitive sensor. This paper describes the synthesis of self-assembly vertically cross-linked 3D Bi 3 Ti 2 O 8 F nanosheets/Au (3D-BTOF Ns/Au) electrode. And its application as a high effective H 2 O 2 sensor was explored. The combination of colorimetric and electrochemical sensing, plays a synergistic role in the qualitative and quantitative detection of H 2 O 2 . Colorimetric sensing was applied to identify the existence or not of H 2 O 2 . Amperometric measurements were further performed to quantitatively detect H 2 O 2 . The 3D-BTOF Ns/Au sensor showed an outstanding sensitivity of 1764 μA mM − 1 cm − 2 , response time of 2 s and low detecting limit of 1.43 μM. The unique vertically cross-linked structure provides abundant electroactive sites for adherence of H 2 O 2 . Particularly, the layered intergrowth structure of [F–Bi–O–Bi–F] sheets can induce an internal electric field (IEF), which greatly benefits to the separation of electron-hole pairs. Appling the traditional Ti/Bi-based materials into the emerging sensing field is a successful attempt. The constructed 3D-BTOF Ns/Au electrode holds promise as “a health guardian” for a real-time sensor to detect H 2 O 2 .
研究领域:
生物医学工程
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2025
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IF 5.1
Yu Fu,Liujingzhou Li,Chao Ye,Leitao Cao,Jinrong Yao,Xin Chen,Shengjie Ling,Zhengzhong Shao
Silk fibroin hydrogels offer attractive biocompatibility and optical clarity but suffer from water-induced fragility, freezing, and biofouling. Here, regenerated silk networks are enzymatically cross-linked and subsequently exchanged with choline-chloride deep eutectic solvents (DESs) containing glycerol and ethylene glycol to create transparent, ionically conductive SF-DES gels. DES infusion preserves the protein’s β-sheet framework while generating a more homogeneous nanonetwork and denser microstructure, increasing compressive modulus by up to 70% without altering protein concentration. The low volatility and depressed freezing points of DESs impart exceptional durability: the glycerol-based gel loses <5 % mass under 37 °C, RH 35% airflow for 7 days, remains unfrozen at −80°C, and the ethylene glycol-based gel maintains flexibility and conductivity of 0.013 mS cm⁻¹ at −40 °C. Choline-based electrolytes inhibit growth of Escherichia coli and Staphylococcus aureus, mitigating microbial degradation. Leveraging this combination of mechanical resilience, environmental stability, ionic conductivity, and antimicrobial activity, bendable indium-free capacitive touch sensors are fabricated that achieve centimeter-scale position resolution and rapid gesture tracking. The study establishes DES infiltration as a general, aqueous-compatible route to robust, multifunctional protein gels, opening opportunities for sustainable wearable electronics, biomedical interfaces, and extreme-environment sensing.
研究领域:
材料科学
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生物医学工程
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柔性电子学
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高分子科学
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可持续技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Yunlong Li,Mingming Liu,Xiaodong Zhou,Yongling Wu
Flexible wearable sensors have garnered significant attention for their potential applications in electronic skins, health monitoring, and smart devices. However, current flexible sensors often suffer from limitations, such as low sensitivity and inadequate resistance to mechanical and chemical degradation. To address these issues, this study presents a CPU@MXene@SiO2 superhydrophobic flexible sensor fabricated using a combination of electrospinning and dip-coating techniques. This sensor features a sandwich structure composed of an electrospinning fiber membrane (CPU) substrate, an MXene conductive coating, and a superhydrophobic SiO2 coating. Based on the fabricated sensor, strain and piezoresistive sensors were further assembled to systematically investigate the effects of micro/nanostructures and chemical compositions on wettability and sensing performance. Experimental results demonstrated that the CPU@MXene@SiO2 sensor exhibited outstanding comprehensive properties including high mechanical strength, superhydrophobicity (CA > 155°, RA < 3°), low adhesion force (33 μN) with water, high sensing sensitivity (gauge factor up to 4922.6), and fast response (response time of 94 ms). Moreover, to validate its potential for large-scale applications, a complete data acquisition system based on an STM32 microcontroller and a mobile application was designed and developed. A 4 × 4 sensor array was successfully fabricated and tested. This sensor demonstrates promising and attractive applications in wearable devices and human–machine interaction, offering an efficient design strategy for constructing robust and highly sensitive flexible sensors.
研究领域:
柔性电子
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传感器
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纳米技术
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材料科学
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可穿戴设备
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人机交互
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiehua Zhang,Baobao Xu,Yiyi Yang,Zhixin Xie,Haihua Xu
Stacked semiconducting nanosheets (SSNs), which feature strong in-plane covalent bonds but weak van der Waals (vdWs) interactions between adjacent layers, hold substantial promise in next-generation, printable, and flexible devices. Among them, SSN-based transistors with high current multiplication offer significant potential for large-area, high-integration electronics and biomedical applications. However, the three-terminal configuration of the transistor inevitably increases the process step and power unit. Here, we demonstrate a dual-terminal ion modulation multiplier (IMM) based on ion-doped SSNs, which was obtained through a solution-processed and cost-effective method. We observed an ion-induced self-multiplication effect occurring in the IMM, which significantly enhanced the sensing performance, particularly in thermal sensing. The IMM thermal sensor exhibited a high resolution of 0.02 K and ultrahigh sensitivity of ∼27%/K, more than 7 times higher than that of ion-type thermal sensors. By combining the enhanced operational stability of IMMs, we successfully developed a dual-channel stretchable respiratory sensor (dSRS) based on IMMs, capable of real-time monitoring of subnasal respiratory signals. The dSRS effectively distinguished normal, rapid, and deep breathing states while accurately detecting abnormal respiration, including apnea and hypopnea. Utilizing the unique properties of IMMs, we developed a monolithically integrated and high-performance IMM glucose sensor with temperature compensation. This IMM glucose sensor demonstrated a high sensitivity of 0.91%/μM, a low detection limit of 100 nM, and a high detection accuracy under temperature interference. Our results clearly demonstrate that IMM devices endow SSNs with promising electrical and sensing capabilities, paving the way for next-generation electronics in the post-Moore era.
研究领域:
材料科学
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生物医学工程
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电子器件
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传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Bio-Design and Manufacturing
·
2024
·
IF 8.1
Wang Gaofeng,Meng Lingxian,Ji Xinyi,Liu Xuying,Liang Jiajie,Liu Shuiren
As the main component of wearable electronic equipment, flexible pressure sensors have attracted wide attention due to their excellent sensitivity and their promise with respect to applications in health monitoring, electronic skin, and human–computer interactions. However, it remains a significant challenge to achieve epidermal sensing over a wide sensing range, with short response/recovery time and featuring seamless conformability to the skin simultaneously. This is critical since the capture of minute electrophysiological signals is important for health care applications. In this paper, we report the preparation of a nacre-like MXene/sodium carboxymethyl cellulose (CMC) nanocomposite film with a “brick-and-mortar” interior structure using a vacuum-induced self-assembly strategy. The synergistic behavior of the MXene “brick” and flexible CMC “mortar” contributes to attenuating interlamellar self-stacking and creates numerous variable conductive pathways on the sensing film. This resulted in a high sensitivity over a broad pressure range (i.e., 0.03–22.37 kPa: 162.13 kPa −1 ; 22.37–135.71 kPa: 127.88 kPa −1 ; 135.71–286.49 kPa: 100.58 kPa −1 ). This sensor also has a low detection limit (0.85 Pa), short response/recovery time (8.58 ms/34.34 ms), and good stability (2000 cycles). Furthermore, we deployed pressure sensors to distinguish among tiny particles, various physiological signals of the human body, space arrays, robot motion monitoring, and other related applications to demonstrate their feasibility for a variety of health and motion monitoring use cases. Graphic abstract
研究领域:
材料科学
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生物医学工程
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电子皮肤技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Huihui Zheng,Hongwei Zhou,Zhao Wang,Shuman Zhang,Hongli Zhang
Hydrogels are promising materials for flexible wearable sensors, but they often suffer from unpredictable mechanical damage. In this work, self-healing polyampholyte hydrogels are developed and explored in constructing wearable mechanosensors including resistive strain sensors and capacitive pressure sensors. In order to prepare the polyampholyte hydrogels, sodium p-styrenesulfonate (NaSS) and (methacryloxyethyl)trimethylammonium chloride (DMC) are used as the anionic and cationic monomers, respectively, and N,N′-methylenebis(acrylamide) (MBAA) is used as the chemical cross-linking agent. The resulting hydrogels, denoted as NaSS/DMC polyampholyte hydrogels, exhibit outstanding self-healing ability, transparency, ionic conductivity, and stretchability. Resistive strain sensors assembled from such polyampholyte hydrogels exhibit a gauge factor (GF) of 2.9 over a strain range of 0–350%, a low response time of 250 ms, and excellent cycling stability. Moreover, sandwich-structured capacitive pressure sensors are assembled utilizing polyampholyte hydrogels containing reliefs as the electrodes. The pressure sensors achieve a GF of 2.17 kPa–1, a sensing range of 0–7.35 kPa, and high cycling stability. The applications of such wearable mechanosensors in monitoring various strains and pressures in daily life are demonstrated. Overall, this work not only develops a smart hydrogel with outstanding self-healing ability but also provides a clue to construct soft electronics for wearable devices.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）