JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Jing Wang,Zihan Xiong,Lijun Wu,Jianwen Chen,Yutian Zhu
Flexible pressure sensors with high sensitivity and wide sensing range are highly desired in e-skins and wearable electronics . However, there is always a trade-off between high sensitivity and broad sensing range for most flexible pressure sensors. Herein, an artificial wheat awn-like hierarchical structure is designed onto the dielectric layer of the iontronic pressure sensor, realizing both high sensitivity and broad working range. The sensor is constructed by sandwiching a wheat awn-like polyvinyl alcohol/H 3 PO 4 dielectric layer between two transparent electrodes of silver nanowires/thermoplastic polyurethane/ionic liquid. The obtained sensor exhibits a high precision of 1 Pa, a high sensitivity of 47.65 kPa −1 (1–200 Pa), a wide measurement range from 1 Pa to 238 kPa, short response/recovery time of 13 ms/12 ms, outstanding stability over 6000 cycles, as well as good transparency. Considering these excellent properties, the sensor shows promising potential in health monitoring, human–computer interaction, wearable electronics, etc.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Shuheng Dong,Dedong Guo,Qingzhou Wang,Huixin Yu,Qing Xu,Ho-Kun Sung,Zhao Yao,Yuanyue Li,Yang Li
Flexible pressure sensors have found widespread application in medical diagnosis and human–computer interaction. These practical applications often require large-area pressure sensing arrays (PSAs) to explore spatial pressure distributions. However, the development of high-performance PSAs still presents significant challenges. Here, a new method is proposed for the fabrication of a high-resolution capacitive PSA in a 10 × 10 configuration. The array comprises the upper and lower electrode arrays of laser-induced graphene patterned on polyimide films, as well as the sandwiched dielectric units based on electrospun nanofiber membranes of H 3 PO 4 @PVPP (cross-linked polyvinyl pyrrolidone). Experimental results indicate that the PSA exhibits high sensitivity across a wide pressure range (0–200 kPa), while offering a rapid response/recovery time of 24/41 ms (at 1 kPa), an exceptionally low detection limit of ∼1.2 Pa, and a good stability of 4000 cycles. Moreover, the crosstalk of the PSA was found to be as low as 1.3%. By employing the PSA in conjunction with a convolutional neural network algorithm, a human foot-arch diagnostic system was developed for accurate detection and quantification of the plantar pressure for different types of foot arches. Such technology has significant potential in clinical detection and disease diagnosis of human foot.
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Xingzuo Li,Tianyi Liu,Suli Wu
Inverse opal photonic crystals (IOPC) have great potential in electrically driven device because of their fast response and excellent electrochromic properties. Nevertheless, the conventional IOPC comprises 74% air, which restricts the range of color-changing. Herein, high-WO 3 -proportion IOPC for the tunable and wide-range electrically driven structural color-changing device via a two-step filling method is fabricated. By utilizing PS@SiO 2 sphere-assembled opal as sacrificial templates, the filling proportion of WO 3 is significantly enhanced by utilizing the polymer that can swell in (NH 4 ) 6 H 2 W 12 O 40 solution to fill the etched regions of the SiO 2 layer. The fabricated devices exhibit a broad color gamut, enabling a wide color-changing from 653 nm to 430 nm. The fastest color-changing rate reached 193 nm −1 s under a reverse voltage of 3.9 V. Moreover, the device has excellent stability, maintaining superior color-changing capability in 100 cycles. The patterned device significantly enhances its integration, thereby facilitating practical applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
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IF 4.4
Anqi Yang,Yan Huang,Songbao Fu,Haodong Zhang,Sailing He
A high-precision pH monitoring system over a wide pH range is introduced. The system comprises a cavity-enhancement module constructed by two high-reflectivity mirrors, a microfluidic pH sensing chip based on a binary-indicator membrane of Congo red and m-cresol purple, and a hyperspectral transmission module. This structure extends the effective absorption optical path of the sensing chip, significantly amplifying the spectral differences at various pH values. The spectrum of the transmitted light is recorded by a self-developed hyperspectral module and then converted to broadband cavity-enhanced absorption spectrum (BBCEAS) via the Beer-Lambert law. An artificial neural network (ANN) is employed to predict pH values of the solution. With such a design, this system exhibits a wide detecting range of 2 M [H + ] − 2 M [OH – ] (corresponding to pH −0.3–14.3) with a response time of about 120 s. The system can achieve a higher detection accuracy with root mean square error (RMSE) of 0.073, as compared to 0.137 without the cavity enhancement. The system also possesses good properties of repeatability, long-term stability, ion resistance, and organic corrosion resistance. These excellent properties make the proposed system a promising candidate technology for harsh environments, such as seawater acidification warning, chemical plant sewage monitoring, and biological sample detection.
研究领域:
分析化学
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环境科学
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yunfeng Wang,Haibao Mu,Shasha He,Shuai Wang,Maoqun Shen,Guanjun Zhang
The saturation phenomenon of TENG at large pressures heavily limits its applications in the field of pressure detection, and the development of wide-range pressure detection devices based on TENG is a considerable challenge. In this paper, a double-layer dielectric layer with a synergistic microstructure and porous structure was prepared, and the CCM-TENG was constructed to realize high output performance and wide range pressure detection. In terms of output performance, owing to the increased effective contact area of the microstructure and porous structure and the introduction of bamboo charcoal and BC/MXene fillers, CCM-TENG shows a superior output performance. A power density of 6.2 W/m 2 is achieved with optimal impedance matching, and at 30*40 mm it is capable of lighting more than 600 LEDs and driving small electronic devices. In terms of pressure detection, the design of the microstructure allows the CCM-TENG to respond well to very small pressures (pulses), while the design of the porous structure allows the CCM-TENG to measure larger pressures (1000 kPa) and achieve fast response/recovery times (14/10 ms@11 Hz). CCM-TENG’s ability to detect a wide range of pressures and comprehensive motion assessments has been validated by human pulse monitoring and motion monitoring. This shows the great potential of wide pressure sensors based on CCM-TENG in the field of wearable sensors.
研究领域:
材料科学
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传感器技术
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Lei Jiang,Yaning Han,Youxun Li,Zhuang Li,Shuyuan Zhang,Xiudong Zhu,Zhibin Liu,Yuxue Chen,Susana Fernandez-Garcia,Yongjiao Tang,Xiaowei Chen
The ubiquitous presence of ochratoxin A (OTA), a toxic food contaminant, requires development of fast and sensitive detection tools. However, it is difficult to find a method that can address high sensitivity and wide detection range simultaneously. In this work, a sensing platform composed of praseodymia nanorods (Pr 6 O 11 -NRs) and aptamers for OTA is established. Under the dual-readout modes, this platform provides a highly sensitive detection of OTA with extra-wide range, over three orders of magnitude with limit of detection (LOD) of 0.8 ng/mL. Both fluorometric and colorimetric signals were obtained because of the excellent fluorescent quenching and oxidase-like activity of Pr 6 O 11 -NRs. This probe enables a detection range of OTA which covers the maximum acceptable levels of most foods. Real samples were tested with this method, demonstrating high sensitivity and good recoveries. This sensing strategy has great potential for an expanded application in point-of-care detection of other toxins via portable devices.
研究领域:
食品安全
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分析化学
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纳米技术
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毒理学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Chunmin Qiu,Guoqiang Wu,Puying Zhao,Junbiao Dai,Qian Luo,Liqing Zhao,Guobin Mao,Yingxin Ma
Background High-precision and broad-range pH detection is critical for health status assessment, such as signal transduction, enzyme activity, endocytosis, and cell proliferation and apoptosis. Although pH-responsive ratiometric fluorescent probes offer an effective pH monitoring strategy, their preparation often requires multi-step modification and decreases fluorescence efficiency and stability. Herein, we developed a simple method to prepare fluorescent Si dots with dual emission centers for high-precision and broad-range pH monitoring, and the detection of urease based on pH-responsive Si dots and pH monitoring in living cell was further explored. Results The dual-emitting Si dots had two emission centers at 427 nm and 500 nm. The emission at 427 nm showed a fluorescence enhancement and effective quenching in the pH ranges of 3.0-10.0 and 10.0-12.0, respectively. While the emission at 500 nm increased gradually with increasing pH from 3.0 to 12.0. Two linear relationships were obtained between the synchronous fluorescence intensity ratio and pH in the ranges of 7.0-9.5 and 10.0-12.0 with a △pH of 0.1, indicating a broad detection range and high precision. Then the Si dots were used to detect urease activity via urea hydrolysis-mediated pH changes. A linear range of 1-80 U/L was established with a detection limit of 0.28 U/L. Furthermore, the Si dots were used for pH imaging in living HeLa cells. The cells changed from green to blue when the pH of HeLa cells increased from 6.0 to 10.0. Significance These findings collectively suggest that the intrinsic dual-emitting Si dots may offer a simple and versatile platform for developing pH-relevant biosensors and bioimaging applications. Additionally, this approach provides reliable methods for preparing intrinsic dual-emitting probe and constructing fluorescence ratiometrics, which widely used in health status assessment.
研究领域:
分析化学
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生物化学
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生物物理学
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生物传感器
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细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Junchi Ma,Bo Wen,Yunlong Zhang,Renqun Mao,Qiang Wu,Dongfeng Diao,Kaichen Xu,Xi Zhang
A sensor which is able to detect both the high- pressure and the subtle pressure is crucial for applications such as physiological health monitoring and human-machine interactions. However, current sensors often struggle to meet these requirements, as they usually rely on a single compression mechanism. In this study, a microvilli-microstructures sensor is reported which is capable of tracking ultra-broad-range pressures based on a synchronous-compression mechanism. The synchronous-compression mechanism includes: i) the increase of microvilli-induced electron-transfer, ii) the increase of microstructure contact area, and iii) the decrease of multi-walled carbon nanotubes spacing. At the high-pressure stages, the mechanisms contribute synchronously to changes in resistance. Hence, this sensor can measure a 5 kPa pressure change under the extremely high- pressure (750 kPa) conditions of meniscus simulation, where the commercial sensor fails. This sensor exhibits a high sensitivity of 58.88 kPa −1 , an ultra-broad working range from 50 Pa up to 782.5 kPa, a rapid response time of 9 ms, and a long-duration (under 250 kPa pressure, cycling for 10,000 times). This flexible pressure sensor also shows versatility and potential for various applications. The synchronous-compression mechanism proposed here can inspire future designs of high-performance flexible sensors.
研究领域:
材料科学
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传感器技术
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生物医学工程
·
柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Guangmeng Chen,Ming Mu,Wenjie Yu,Li Jia,Ziqiang Hu,Weiwei Zhao,Xiaoqing Liu
Flexible sensors in practical applications require them to show sufficiently high sensitivity over wide sensing ranges, however, there always exists a trade-off. Herein, we address the aforementioned challenging through the geometric innovation of laser-induced graphene (LIG) conductive paths. A liquid benzoxazine (PGE-fa) precursor is developed to enable the in-situ LIG fabrication on PDMS substrates, eliminating the conventional transfer-induced defects. Furthermore, a dual architecture integrating straight and serpentine LIG patterns in parallel synergistically resolves the sensitivity-range paradox, where the straight segments bear high sensitivity (GF = 68.98 at 1% strain) for micro-strain detection (0.05–10%), while the serpentine components maintain conductivity for large-strain tolerance (up to 30%). It is revealed that the cracks appear in straight LIG line under small deformations, resulting in resistance change to guarantee high sensitivity, whereas the serpentine LIG line can dissipate stress through in-plane bending and rotational deformation, and therefore, contribute to the conductive path to accommodate broad strain range. In addition, the sensor exhibits exceptional performance of rapid response/recovery (180/200 ms), ultralow detection limit (0.05% strain), and 5,000-cycle durability. Experimental validations in pulse waveform analysis, blink detection, joint motion monitoring, and Morse code-based human-machine communication collectively demonstrate the sensor's versatility across diverse physiological and biomechanical sensing scenarios. It is believed that the intelligent structural design in this work is attractive for the development of high-performance wearable systems in personalized healthcare.
研究领域:
材料科学
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纳米技术
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传感器技术
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生物医学工程
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柔性电子学
·
人机交互
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Haiyong Chen,Jing Wang,Duoliang Shan,Jing Chen,Shouting Zhang,Xiaoquan Lu
pH plays an important role in understanding physiological/pathologic processes, and abnormal pH is a symbol of many common diseases such as cancer, stroke, and Alzheimer’s disease. In this work, an effective dual-emission fluorescent metal–organic framework nanocomposite probe (denoted as RB-PCN) has been constructed for sensitive and broad-range detection of pH. RB-PCN was prepared by encapsulating the DBI-PEG-NH2-functionalized Fe3O4 into Zr-MOFs and then further reacting it with rhodamine B isothiocyanates (RBITC). In RB-PCN, RBITC is capable of sensing changes in pH in acidic solutions. Zr-MOFs not only enrich the target analyte but also exhibit a fluorescence response to pH changes in alkaline solutions. Based on the above structural and compositional features, RB-PCN could detect a wide range of pH changes. Importantly, such a nanoprobe could “see” the intracellular pH changes by fluorescence confocal imaging as well as “measure” the wider range of pH in actual samples by fluorescence spectroscopy. To the best of our knowledge, this is the first time a MOF-based dual-emitting fluorescent nanoprobe has been used for a wide range of pH detection.
研究领域:
材料科学
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化学
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纳米技术
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生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Ningle Hou,Youwei Zhao,Tian Yuan,Ling Li,Xiaoting Li,Wenming Zhang
Flexible multifunctional pressure sensors for human motion monitoring have recently attracted extensive attention. However, the preparation of a multifunctional sensor with wide coverage and high sensitivity to pressure detection remains a considerable challenge. Here, we design a flexible multifunctional pressure sensor consisting of Cu-catechol nanowire coated carbonized nanofiber networks (Cu-CAT@CNFN) sandwiched between two interlocking polydimethylsiloxane doped with ZnS:Cu (ZnS:Cu/PDMS) composite electrode films. Due to the pressure concentration between the interlock micromastoid arrays and the thicker pressure sensitive layer, the pressure sensors demonstrate a high sensitivity of 45.40 kPa −1 , pressure detection coverage of 0 to 110 kPa, a response time of 0.166 s, outstanding cyclic stability of 5,000 cycles and visualization of the pressure. Furthermore, the pressure sensor can be used to detect pulses, wrist and elbow bending, and finger press. The excellent performance of the pressure sensor demonstrates its application potential in the next generation of wearable electronics.
研究领域:
材料科学
·
电子学
·
可穿戴技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Haohui Zheng,Gaofeng Chen,Lihui Gan,Jian Liu,Lu Lin
Ultra-light elastic carbon aerogels with high compressibility have broad application prospects in wearable devices. Especially, they are ideal materials for fabricating flexible piezoresistive sensors. In this paper, an ultra-light carbon aerogel was successfully fabricated using freeze-drying and carbonization of the solution containing chitosan (CS), polyimide (PI), and FeCl3·6H2O. Owing to the interplay interaction between CS and PI and the adjustment of the FeCl3 concentration, this carbon aerogel with compact, continuous, ordered, layered structure shows a wide range of excellent sensing properties (10.28 kPa–1 and 0–6 kPa), remarkable long-term stability (1000 cycles), and outstanding mechanical properties (withstand up to 95% compression strain and 1000 cycles compression under 50% strain without deformation). In addition, the carbon aerogel can be bent to detect different angular changes. These advantages mentioned above allow carbon aerogel to be wildly used to detect human movement and biological signals.
研究领域:
材料科学
·
纳米技术
·
传感器
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可穿戴技术
·
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）