ACS Applied Electronic Materials
·
2024
·
IF 4.3
YuXiang Qin,ZiCheng Zhou
The multinetwork hydrogel-based biomechanical sensor has attracted considerable attention due to its excellent mechanical properties. However, in most cases, due to the weak binding force of the hydrogel matrix to water and the uneven structure of the sensing layer, it is difficult to prepare pressure (strain) sensors that can quantify stimuli-response and be durable for long periods. Moreover, the preparation of hydrogels often involves the intervention and residue of toxic substances, making them unsuitable for monitoring biomechanical indicators. In this paper, we prepared a flexible, conductive biohydrogel capable of long-term storage using low-cost, biocompatible materials. The hydrogel is composed of lignosulfonate sodium and poly(vinyl alcohol), blended with acrylic acid and enhanced with various cations with different hydration abilities. The pressure sensor based on the as-prepared hydrogel exhibits a high sensitivity of 1.145 kPa–1 to medium pressure encountered by the human body (i.e., 0.1 to 10 kPa). Due to the high flexibility and toughness of the hydrogel, the corresponding pressure sensor demonstrates 2500 cycles of cycling stability. Also, the strain sensor based on the as-prepared hydrogel shows a wide testing range from 0 to 1100% and quantifies the strain–response physical process based on its mechanical and electrical properties, making it suitable for use. Due to the compressibility, high sensitivity, and long-term stability, the proposed sensors could show great potential in wearable electronic devices for monitoring biological activities.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2017
·Vol. 29
·期 10
·2307-2315
·
IF 2.851
Jian Li,Zhanming Bai,Yanjun Mao,Qingqing Sun,Xiaohui Ning,Jianbin Zheng
A disposable sandwich-type electrochemical sensor for selective detection of glucose was established. The primary receptor, 3-aminophenylboronic acid was grafted covalently onto the surface of screen-printed carbon electrodes through an in situ-generated diazo-reaction. Glucose was first captured by boronic acid group on the electrode, followed by captureing an electroactive ferroceneboronic acid (FcBA) as the secondary receptor to form bidentate glucose-boronic complex. Electrochemical impedance spectroscopy was applied to characterize the construction of sandwich-type disposable sensor. In the sandwich assay, current response of captured FcBA on the electrode was dependent on the concentration of glucose. The sandwich assay showed higher selectivity for glucose than that for fructose, mannose, galactose and other electroactive interferences including uric acid, ascorbic acid and dopamine, and exhibited a dynamic concentration range of glucose from 0.5 to 20.0 mmol L −1 . The disposable sensor demonstrated a good reproducibility with 2.2 % relative standard deviation (RSD). In addition, the disposable glucose sensor was used in detection of the trace glucose in the clinical urine samples.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2021
·
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2018
·
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
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
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
·
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
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
Soft Matter
·
2024
·
IF 2.9
Lina Ye,Ruichen Yang,Xinxin Yu,Xingyue Sun,Haiyi Liang
To avoid the potential toxicity of monomer residues in the synthetic polymer based organohydrogels, natural polysaccharide based organohydrogels are expected to be used as a multi-functional wearable sensory system, but most of them own unsatisfactory stiffness, strength and fracture toughness. Herein, a cooking and soaking strategy is proposed to prepare a novel natural polysaccharide-based organohydrogels possessing outstanding stiffness, strength, toughness, freezing resistance, heating resistance and long-term durability. The agar organohydrogel exhibits fracture stress of 3.3 MPa, young’s modulus of 2.26 MPa and fracture toughness of 14.8 kJ/m2, the κ-carrageenan organohydrogel exhibits fracture stress of 3.3 MPa, young’s modulus of 4.34 MPa and fracture toughness of 11.0 kJ/m2, the gellan organohydrogel exhibits fracture stress of 1.2 MPa, young’s modulus of 2.81 MPa and fracture toughness of 5.4 kJ/m2. Furthermore, the agar organohydrogels are assembled into multiple wearable sensors such as strain (5%-150%), temperature (-15-60◦C) and humidity (11%-97%) by introducing NaCl as conducting agents, illustrating exceptional multi-sensory capabilities. Therefore, the developed strategy has shown a new pathway towards strengthening polysaccharides-based organohydrogels and towards potential in wearable sensory system.
研究领域:
材料科学
·
高分子科学
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传感器
·
可穿戴技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xiaofei Mao,Yixiao Wang,Hao Li,Peilong Zhao,Nan Zhao,Bo Xie,Yuguang Zhou
Graphene, a carbon material with high carrier mobility and low current density, is a promising candidate for the fabrication of flexible sensors. However, its production using traditional methods is complex and expensive, whereas the synthesis of laser-induced graphene (LIG) is eco-friendly and inexpensive under ambient conditions. LIG features a 3D porous structure with localized defects, which is influenced by substrate properties, laser parameters, and processing steps. Herein, the influence of the twist angle between two laser irradiation steps on the porous structure and conductive characteristics of LIG is explored. The results show that the optimal twist angle is 4°, at which the square resistance of LIG is as low as 12.0 Ω sq−1. The change in the conductivity of LIG occurs because the optimal twist angle between the two graphene layers opens the band gap. LIG with a twist angle of 4° is selected to prepare a biosensor and a Hall sensor. It is found that the LIG-based biosensor exhibits a lower detection limit of 8.62 μM when detecting uric acid (UA). Furthermore, the Hall sensitivity of the cross and circular Hall sensors is ∼0.59 and ∼0.64 V (A−1 T−1), respectively. This study supports the application of LIG in flexible sensors and provides some guidelines for further exploration of the 3D structure of LIG.
研究领域:
材料科学
·
纳米技术
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传感器
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柔性电子学
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石墨烯技术
✓ 已验证
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2020
·Vol. 12
·期 9
·1079-1086
·
IF 1.128
Hao Haitao
At present, chemical biosensors still have poor reproducibility and stability due to that the density of nanomaterials particles is not ideal. Therefore, an optimal design method of electrochemical biosensor based on gold nanomaterials is proposed. Two types of sensors, namely DNA biosensor
and immune biosensor, were designed in this work. A DNA biosensor with gold nanorod nanocomposite modified electrode was prepared, and its electrical activity was measured by Methylene blue. In contrast, an electrochemical immune sensor with gold nanorod-modified electrode was prepared and
used for detection of alpha fetoprotein. The experimental results show that the designed DNA biosensor and electrochemical immune sensor have the advantages of simple preparation, high sensitivity, good selectivity and good stability.
研究领域:
生物传感技术
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纳米生物学
·
医学检测
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 56
·期 46
·465302
·
IF 3.4
Anbo Zheng,Yuxiang Qin,Qing Xia,Yanxu Chen,Xueshuo Zhang
The realization of flexible pressure sensors that could mimic the perception functions of human skin (touch, temperature, and humidity) is important for development of electronic skin. However, the design and preparation of highly sensitive sensors for multifunctional sensing of pressure, temperature and humidity remains a challenge. Here, we first designed and prepared a flexible starch/polyacrylamide (PAM) double-network hydrogel, with additional introduction of Na+ and Cl− to further enhance the electrical properties. Subsequently, a multifunctional pressure sensor was fabricated by sandwiching a microstructured starch-based hydrogel into two flexible AgNWs electrodes. In the test run, the prepared sensor exhibited a high sensitivity of 48.35 kPa−1, a fast response time of 11 ms, and remarkable mechanical stability (>3000 cycles). Given the satisfactory performance for pressure sensing, we demonstrated the ability of the sensor to monitor various human dynamics. Moreover, the starch-based hydrogel was further developed as a flexible temperature and humidity sensor for its water absorption and swelling properties. In particular, the asynchrony of pressure, temperature and humidity strains (straining to stability at 11 ms, 2 s and 10 s, respectively) resulted in the automatic separation of different electrical signals. The intuitive interpretation of the data without involving complex parameter separation calculations allowed the starch-based hydrogels to be developed as an integrated, multifunctional sensor of pressure, temperature and humidity with high sensitivity and flexibility. The above properties suggest that the prepared bio-based hydrogels may provide a new solution for the prospect of green and multifunctional electronic skin development.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Qingwen Wu,Wenfeng Shen,Dawu Lv,Weigang Chen,Weijie Song,Ruiqin Tan
Resistive-type polyaniline (PANI) based sensing film was fabricated by a simple in-situ polymerization method with graphene (GP) as additives on flexible porous polyvinylidene fluoride (PVDF) substrate. The fabricated flexible GP-PANI/PVDF membrane demonstrates a multi-hierarchical porous microstructure, enhancing its sensing performance towards ammonia (NH 3 ). The optimized GP-PANI/PVDF sensor shows 60% response towards 1 ppm NH 3 with a response time of 46 s, and 10% response towards 0.1 ppm NH 3 at 24℃, respectively. Moreover, the GP-PANI/PVDF sensor presents excellent flexibility, exhibiting only small response values’ difference upon several bending angles and after 1500 bending/extending cycles. Besides, the GP-PANI/PVDF sensor exhibits a strong linear relationship between the NH 3 response values and working temperatures with a range of 24℃∼50℃. The results demonstrate that the flexible GP-PANI/PVDF film sensor holds great promise for the application of portable, lightweight, and room temperature sub-ppm level NH 3 detection devices.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）