MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Chen Liu,Yanbing Wang,Qianqian Wang,Wenjie Zhao,Zijian Li,Qingfeng Wang,Kunyang Li,Xu Sun,Sheng Zhang
Wearable microfluidic sweat biosensors have drawn great attention for their noninvasive ability to detect various biomarkers in human sweat. However, traditional microfluidic biosensors are always complicated and inflexible, limiting modification after production. This work proposed a cost-effective and easy-to-fabricate method inspired by traditional Chinese mortise-tenon structure joints to develop a wearable modular sweat sensing system without glue, nails, or any other materials. Both electrochemical sensors and colorimetric sensors can be integrated into the wearable modular microfluidic sensing system to meet different requirements. The proposed microfluidic sensing system can avoid flow-through mixing effects using capillary bursting valves and detect pH, together with Na + and Cl − in collected sweat. The detected biomarkers can be added or changed in this microfluidic sensing system according to distinct applications. Therefore, this work provides a novel way to fabricate multifunctional wearable sensing systems and sheds light on the future of point-of-care testing and personalized healthcare.
研究领域:
生物医学工程
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可穿戴传感器
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微流控技术
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即时检测
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个性化医疗
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Chunyan Chen,Zhiwu Huang,Guoqing Xiao,Chunlin Chen,Xuehu He,Jiaxiang Chen,Xuan Zhou,Jiajia Cui,Tianju Zhu,Jiajia Zhang
Hydrogen energy is a highly promising clean energy source, held immense potential for commercial applications. However, the inherent flammability of hydrogen posed significant safety challenges, creating an urgent need for the development of reliable, standalone, and cost-effective hydrogen sensors. Currently, main hydrogen sensors typically relied on high-temperature operating conditions, which to some extent limited their deployment in specific application scenarios. Our research focused on material systems and structural design. Hollow spherical ZnSnO 3 nanoparticles were first synthesized, followed by uniform loading of ZnSnO 3 onto rGO aerogel to form a p-n heterojunction. Notably, the ZTO@rGA-4 sensor exhibited a high response value (98.2) to 10,000 ppm hydrogen at 25 °C, with short response/recovery time (44/92 s), alongside excellent repeatability and long-term stability.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xinyi Wang,Shuai Liu,Yunqi Xu,Ziyang Fan,Zimu Li,Chunyu Zhao,Wei Yang,Jianpeng Wu,Shuyu Lai,Xinglong Gong,Shouhu Xuan
Despite the rapid development of wearable electronics in sports rehabilitation and healthcare, traditional wearable electronics still have limitations such as poor personal protection, limited multifunctional sensing capabilities, and weak balancing between comfort and intelligence. This study introduces a breathable, comfortable, and protective Leather/MXene-AgNWs/Aerogel (LMAA) wearable electronic that combines stress-humidity dual-modal sensing, impact attenuation, and temperature management. The Janus porous integration is realized by heterogeneity modulating the natural three-dimensional woven leather structure and the isotropic porous aerogel (with air permeability of 3 mm/s and water vapor transmission of 877.6 g·m −2 ·d −1 ). Through optimizing the sandwiched MXene-AgNWs conductive layer and hierarchical structure, the LMAA can provide stress deformation detection via resistance variation (>10,000 cycles) and environmental humidity monitoring through capacitance changes (1.4 % RH −1 sensitivity, R 2 > 0.997), together with multifunctional personal protection, such as anti-impact (attenuate>30 % of impact force), joule heating (reaching 57.1 °C at 2.5 V), electromagnetic interference shielding (SE T = 38.3 dB), and antibacterial properties. Furthermore, a prototype smart knee pad showcases real-time monitoring of joint movement and skin moisture, along with therapeutic heating capabilities. By integrating machine learning, the smart knee pad successfully collects and recognizes various running data. LMAA offers a comfortable and durable solution for sports rehabilitation and health monitoring applications.
研究领域:
生物医学工程
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柔性电子
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智能穿戴
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康复工程
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传感器技术
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材料科学
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健康监测
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
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IF 5.401
Lingjie Hou,Jia Feng,Yubin Wang,Chuan Dong,Shaomin Shuang,Yu Wang
An efficient fluorescein based probe (H 2 L) for the dual sensing of Al 3+ and Cu 2 + has been synthesized and characterized. H 2 L was highly selective toward these two ions with different fluorescence signals and binding modes in two different media. In EtOH-H 2 O (3:2, v/v; pH 4.0), H 2 L selectively binds Al 3+ to form a 1:1 ligand/metal complex, giving rise to a visible pale pink-to-yellow color change and fluorescence enhancement at 440 nm, while in CH 3 CN-H 2 O (2:3, v/v; pH 7.2), H 2 L and Cu 2+ form a 1:2 ratio complex, resulting in a color change from pink to orange-yellow and a significant fluorescence enhancement at 520 nm. The binding modes were confirmed by fluorescence, absorption, IR, ESI-MS and 1 H NMR titrations. The detection limits were calculated to be 7.32 × 10 −8 M and 1.47 × 10 −8 M for Al 3+ and Cu 2+ , respectively. Cell imaging studies demonstrate that this sensor is capable of sensing Al 3+ and Cu 2+ in living cells.
研究领域:
分析化学
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材料科学
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生物化学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 40
·23243-23255
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IF 12.732
Hongjie Chen,Jianren Huang,Jiantao Liu,Jianfeng Gu,Jundong Zhu,Bing Huang,Jin Bai,Jinquan Guo,Xiaoxiang Yang,Lunhui Guan
The conductive hydrogel has shown extensive applications in multifunctional sensors. However, the intrinsic characteristics of conductive hydrogels, such as lacking anti-freezing, mechanical strength, and being easily dehydrated have hindered their application in wearable devices. Herein, reduced graphene oxide (rGO) and graphene oxide (GO) nanosheets were incorporated into a porous cross-linking poly(vinyl alcohol) (PVA) hydrogel network within dimethyl sulfoxide (DMSO)/H2O binary solvent. A honeycomb-like dense micro-network and uniform dispersion conductive tough fillers endow high toughness (3.1 MPa @ 600% strain) and conductivity to the organohydrogel. With the intense interaction between water and DMSO, the organohydrogel exhibits reliable mechanical and electronic performance in a wide range of temperatures (−30 to 60 °C) and possesses excellent ambient stability. The organohydrogel had excellent sensitivity and linear repeatable response ability in both mechanical and thermal stimulation. With the integrated unique features, the sensitive organohydrogel was developed for a multifunctional sensor. As a strain/pressure sensor, it exhibited a sensitive response to the applied tensile or compressed strain with repeatability and durability. As a temperature sensor, it presented excellent linear and reliable thermal response with a high sensing accuracy. This work provides a new paradigm for designing a wearable multifunctional sensor or E-skin, which is used to detect the motion or temperature of the human in the future.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
Chemosensors
·
2023
·Vol. 11
·期 7
·376
·
IF 4.2
Xiangxiang Fan,Susu Yang,Chun Huang,Yujie Lu,Pan Dai
In this work, ZIF-8-derived Co3O4@ZnO microspheres were prepared by a liquid-phase concentration-controlled nucleation strategy. The results of the material characterization showed that Co3O4@ZnO microspheres were obtained, and the surface structure could be controlled with the concentration of the ligand. Compared with pure Co3O4microspheres, the operating temperature of optimized Co3O4@ZnO microspheres increased by 90 °C after the gas-sensing test. The response to 50 ppm acetone of Co3O4@ZnO microspheres was 4.5 times higher than that of pure Co3O4, and the detection limit reached 0.5 ppm. Meanwhile, Co3O4@ZnO microspheres showed a shorter response-recovery time and better selectivity. The enhanced-sensing mechanism of the ZIF-8-derived Co3O4@ZnO microspheres was also analyzed.Keywords:gas sensor;microspheres;MOF;ZIF-8
研究领域:
材料科学
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化学传感器
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纳米技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Zhanglin Chen,Songmo Du,Fei Li,Shijia Zhang,Shuo Zhao,Zhaobo Tian,Jie Zhang,Xuanyi Yuan,Guanghua Liu,Kexin Chen
Photoluminescent materials, serving as optical probes, constitute a significant medium for reliable remote sensing of fundamental state parameters such as temperature and pressure. Herein, we report a novel Mn 4+ -activated perovskite-type La 3 Mg 2 SbO 9 phosphor (LMS:Mn 4+ ) for bifunctional application in both thermometry and manometry. Upon excitation with 341 nm, LMS:Mn 4+ (0.7% Mn 4+ ) emits a bright narrow-band red light peaking at 705 nm with an FWHM (full width at half maximum) of 32 nm. As a thermometer, when the temperature surpasses 298 K, non-radiative transitions from the 2 E g excited state lead to a sharp decrease in decay lifetimes with increasing temperature. This allows for lifetime-based luminescence thermometry with a relative sensitivity of 2.52% K −1 at 391 K. Moreover, LMS:Mn 4+ was processed into a temperature-sensing coating and its non-contact thermometry functionality was validated. In manometry applications, the LMS:Mn 4+ probe experiences substantial pressure-dependent redshift with a sensitivity of 1.20 nm/GPa in the testing range of 9.48 GPa, which is about 3.3 times that of conventional ruby probes. Furthermore, its FWHM consistently remains below 37 nm, which contributes to a high reliability of pressure measurements. The above results indicate that the LMS:Mn 4+ constitutes a promising bifunctional luminescence probe material in thermometry and manometry.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 9
·2123
·
IF 3.623
Ming Liu,Caochuang Wang,Pengcheng Li,Liang Cheng,Yongming Hu,Yao Xiong,Shishang Guo,Haoshuang Gu,Wanping Chen
Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO2nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO2grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO2at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 35
·18256-18266
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IF 14.511
Fu-Lin Gao,Peng Min,Xuan-Zhi Gao,Changjun Li,Tingting Zhang,Zhong-Zhen Yu,Xiaofeng Li
Conventional temperature–pressure bifunctional sensors based on thermoresistive and piezoresistive effects could not meet the growing demand for detecting multiple signals due to their intractable signal-coupling problems. It is imperative to develop new approaches to detect multiple stimuli with single devices without complex decoupling processes. Herein, integrated temperature and pressure dual-mode sensors are fabricated by decorating elastic polydopamine-modified PDMS (PDA@PDMS) foam with thermoelectric PEDOT:PSS/carbon nanotube (CNT) components. The resultant PEDOT:PSS/CNT@PDA@PDMS (PCPP) sensor exhibits an accurate temperature sensing capability with an ultrahigh Seebeck coefficient of 40.5 μV K−1 and an ultralow detectable temperature of 0.05 K. Thanks to the elastic and porous PDMS foam and the thermoelectric PEDOT:PSS/CNT components, the PCPP sensor can detect both static and dynamic pressures with high sensitivity, fast response time, a wide detection range, and excellent durability. Notably, under the simultaneous stimulation of both temperature and pressure, the dual-mode PCPP sensor can convert these two stimuli to independent voltage and resistance signals on the basis of thermoelectric and piezoresistive effects. Meanwhile, the thermoelectric effect endows the sensor with human energy harvesting capacity by exploiting the temperature gradients between human skin and the environment. All these characteristics make the dual-mode PCPP sensor promising for wearable electronic skin applications.
研究领域:
材料科学
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电子皮肤
·
能量收集
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jinhao Gao,Hanwen Wang,Zhiyuan Gao,He Gui,Yanxin Wang,Jianguo Tang,Linjun Huang
The flexibility, wide response range, and ultra-high sensitivity of flexible sensors make them suitable forwearable technology, automated manufacturing, and robotics. The development of raw materials for flexible sensors and the design of their source layer structures can address a range of issues. In this article, we aim to develop flexible sensors for wearable technology by preparing MXene/PVDF@ZIF-8 multilayer nanofiber membranes through electrospinning technology. By incorporating ZIF-8 particles into PVDF fibers through in situ electrospinning technology, flexible sensors with a rough structure were obtained. We similarly employed vacuum filtration technology to introduce MXene nanosheets into PVDF@ZIF-8 nanofibers, further constructing a conductive network with a multidimensional structure in the vertical direction of the film. The performance of the prepared MXene/PVDF@ZIF-8 composite fiber membrane pressure sensor was tested, revealing its wide working range (0–125 kPa), high sensitivity (25.8–77.9 kPa -1 ), load/unload Time (20 ms/30 ms), and strong mechanical stability. Various human movements and lying postures were simulated, confirming that the sensor can effectively provide feedback on external pressure applied to the skin. This also demonstrates the broad application prospects of the flexible sensor in the field of flexible wearables.
研究领域:
材料科学
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传感器技术
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纳米科技
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yi Tian,Yunlong Yue
To improve the photoluminescence (PL) and increase photostability of carbon dots (CDs), phosphorus doped CDs with bright green emitting were prepared using (NH 4 ) 2 HPO 4 and m-phenylenediamine (MPD), and terephthalic acid (TA) via a solvothermal synthesis. Compared to undoped CDs (M−CDs), the PL efficiency of P-doped sample (M−6 %P-CDs) created using optimized conditions was improved from 55.1 to 73.9 %. These bright CDs were incorporated in films to test the stability, in which the photostability in liquid and polymer films were improved by 6 and 37 %, respectively. Namely, it is found that P affected the functional groups of on the surface and inside CDs. Phosphorus promoted the dehydration condensation reaction of precursors, increased the structural defects of the CDs, separated the sp 2 structural domains, and retained more oxygen-containing functional groups. In the case of o-phenylenediamine (OPD) instead of MPD, the PL efficiency of P-doped CDs was decreased. This is ascribed to P impeding the polymerization process of OPD. These CDs were used for pH and Cr(VI) ion sensors. P-doping improved the sensitivity of CDs to pH and Cr(VI). The pKa value of sample M−6 %P-CDs was 8.32 which was much lower compared with undoped one (∼1.97). Moreover, P-doped CDs revealed significantly enhanced sensitivity response to Cr(VI). The detection range and detection limit of M−6 %P-CDs for Cr(VI) was 1–130 μM and 0.59 μM, respectively. These results are crucial for the preparation and applications of CDs.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhaorui Zhang,Jiahao Liu,Haiying Du,Xufei Zhao,Haoming Sun,Minghui Yang,Jinkui Chu
A surface functional group modulation method was used to regulate the NO 2 sensing performance of the Ti 3 C 2 T x sensor. The monolayer Ti 3 C 2 T x MXene was synthesized from Ti 3 AlC 2 (MAX phase) by hydrofluoric acid (HF) etching. Ar/O 2 hybrid plasma treatment was used to regulate the ratio of hydroxyl and fluorine functional groups (OH/ F) in the Ti 3 C 2 T x surface structure. Room-temperature (RH) NO 2 sensor based on modified Ti 3 C 2 T x was fabricated by the dip coating method. The modified Ti 3 C 2 T x sensor has a higher gas response (45.31 %) to 50 ppm NO 2 compared with the untreated Ti 3 C 2 T x sensor which shows more excellent sensitivity and linearity with the NO 2 concentration of 5–50 ppm. It is due to that the presence of the hydroxyl potential on the Ti 3 C 2 T x surface well amplifies the electronic surface activity of Ti 3 C 2 T x . Concurrently, the modified electronic structure augments the adsorption propensity of Ti 3 C 2 T x for O 2 (2.26 |eV|) and NO 2 (3.24 |eV|), thereby improving the NO 2 sensing capability of the Ti 3 C 2 T x sensor. These results demonstrate that Ti 3 C 2 T x with a high ratio of OH/ F functional groups has great potential in developing high-performance room temperature NO 2 sensors.
研究领域:
材料科学
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环境科学
·
化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）