MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yongchun Li,Yesong Xu,Hongrui Liu,Hao Duan,Hong Wang
Ionized Calcium (Ca 2+ ) is the physiologically active component involved in many physiological processes such as blood coagulation, muscle contraction, neurotransmitter release, and hormone secretion. It is known that derangement in Ca 2+ level is associated with adverse outcomes and increased mortality, therefore, the dynamic and continuous monitoring of blood Ca 2+ concentrations are essential for managing patients, which can avoid consequences of delayed treatment and overcorrection in critically ill and severely injured patients. This study presents a needle-shaped Ca 2+ solid-contact ion-selective electrode (SC-ISE) utilizing a graphite-polydimethylsiloxane (Gr-PDMS, GP) composite as the transduction layer. The composite integrates the excellent conductivity and low cost of Gr with enhanced double-layer capacitance, hydrophobicity, and adhesion, making it an ideal material for ISEs. The electrode demonstrates a near-Nernstian response (28.2 mV/decade) and exceptional long-term stability (potential drift: 25 μV/h). Its performance was validated through accurate Ca 2+ detections in serum and blood, with in vivo testing on New Zealand rabbits under dynamic conditions such as fluid administration and injection, highlighting its potential for real-time clinical applications.
研究领域:
生物医学工程
·
临床检验医学
·
电化学传感器
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重症监护
·
转化医学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2020
·Vol. 4
·期 6
·2000126
·
IF 7.527
Hanjin Jiang,Hairui Fang,Dong Wang,Jianbo Sun
Due to its promising potential applications in seawater desalination and purification, solar steam conversion has attracted tremendous attention recently. The light-to-heat conversion capacity of solar absorbers directly affects the rate at which freshwater is produced by the evaporation system. Herein, an efficient double-layer evaporator is developed using MoS 2 /LaF 3 /PDMS ink as an absorber that is printed onto a commercial PTFE membrane by the controlled ink-spray method. The LaF 3 nanoparticles-decorated MoS 2 nanoflowers nanocomposite exhibits enhanced adsorption of sunlight due to semiconductor/solid electrolyte interface synergetic effect-induced broadband absorption ability. Combining the advantages of local heating and rapid vapor emission, the water evaporation rate of the evaporator with spray ink in sunlight is 1.76 kg m −2 h −1 and the corresponding high light-to-heat conversion efficiency is 91%. Also, the membrane module has good operability, certain mechanical strength, and good long-term stability. The synergistic effect of a rare-earth solid electrolyte and semiconductor provides new ideas for the design and development of materials with high light-to-heat conversion efficiency and good thermal stability.
研究领域:
材料科学
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能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2021
·
IF 4.051
Shanshan Guan,Yaokai Tang,Shichuan Song,Hongfu Liu,Shugao Zhao
In this study, two kinds of hybrid particles named as BT@CNT and CNT@BT were prepared by chemical bonding between barium titanates and two types of carboxyl-functionalized multi-walled carbon nanotubes with different structural parameters in the presence of silane as a coupling agent. The effects of structures of hybrid particles on microstructure and dielectric performance of the obtained composites were studied. Herein, the BT@CNT hybrid filler aids in improving the dielectric permittivity and the CNT@BT hybrid filler has a main advantage in suppressing the dielectric loss (Dielectric permittivity 300–573 and loss 39.5–6.9 for BT@CNT/PDMS, Dielectric permittivity 65–120 and loss 1.5–0.75 for CNT@BT/PDMS at 100 Hz). Additionally, the dielectric performances of the composites can be manipulated by controlling the hybrid fillers structure and the hybrid ratio. In sum, this work looks promising for the fabrication of property-tailored materials for wide applications in electrostatic capacitors, embedded devices and charge storage device in future.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Ange Nsilani Kouediatouka,Qi Liu,Fagla Jules Mawignon,Wei Wang,Jiawei Wang,Chunbiao Ruan,Kanfolo Franck Herve Yeo,Guangneng Dong
In this paper, a polymer blend labeled PDMS/Ecoflex (PE) was fabricated using Polydimethylsiloxane (PDMS) and Ecoflex 00-30 in various proportions. An innovative carbon nanotube/carbon black (CNT/CB) hybrid filler reinforced cetyltrimethylammonium bromide (CTAB) surfactant was prepared and sprayed to obtain CNT/CB/PE composite material. The resulting PE blend matrix showed excellent mechanical properties, including high stretchability of nearly 500% strain, minimal hysteresis, and reduced friction by up to 75% with decreasing wear. These properties were attributed to the combined effect of Young’s modulus, stiffness, and hardness of PDMS and Ecoflex. Additionally, three types of contacts CNT-CB, CB-CB, and CNT-CNT were produced by the favorable interaction of CNT and CB particles, stabilizing the sensor signal. The CNT/CB/PE sensor had an improved wear resistance, conductivity stabilization, stretchability, gauge factor during the tensile test, and strain-dependent sensitivity across a broad range of fixed strains (up to 100% strain). Furthermore, the sensor was attached to various human body joints to track the related human motions, proving the fascinating perspective in detecting various human movements and making it appropriate for application in multifunctional wearable devices in hostile environments.
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
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2019
·Vol. 4
·期 9
·1900414
·
IF 5.395
Shuai Zhao,Rong Zhu
Flexible pressure sensors attract wide attentions in recent years for their significant applications in wearable electronics and health monitoring. It is strongly desired that a pressure sensor possesses both low detection limit and wide measuring capability, covering a broad pressure range from Pa to hundred kPa, to meet diverse demands in different applications. This paper proposes a novel flexible pressure sensor based on thermosensation, using a multilayered and graded-porosity polydimethylsiloxane/silver nanoparticle sponge as piezo-thermic transduction. The sensor exhibits a high sensitivity, a low detection limit of 4.1 Pa, and a wide measuring range up to 200 kPa, which leads to a high range-to-limit ratio of about 50 000. The pressure sensor is monolithically integrated with a temperature sensor and dissolves temperature-compensation. The unique combination of properties makes it feasible to monitor various human signals from subtle wrist pulse to finger tapping pressure and foot stepping pressure by a single device, which shows competent capabilities for multifarious applications in wearable electronics and health monitoring.
研究领域:
生物医学工程
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传感器技术
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可穿戴设备
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健康监测
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柔性电子
·
转化医学
✓ 已验证
DOI
高影响因子
Engineering Research Express
·
2023
·Vol. 5
·期 1
·015080
·
IF 1.7
Kunpeng Gao,Qianjin Wang,Junqi Tang,Yingkai Liu
Resistive-type strain sensors have been widely studied because of their high precision and convenient measurement. But the high sensitivity and large strain range of this kind of sensor conflict with each other. It is difficult to prepare a sensor with high sensitivity and a large tensile range at the same time. Here, we propose a method to use AgNWs/Ag microparticles (AgMPs) and PDMS to simultaneously manufacture two strain sensors with different principles, a crack-based sensor and a composite-based sensor. On the one hand, the crack-based sensor has a low detection limit of 0.5% strain and high sensitivity of GF ≈ 90 at the strain of 0 ∼ 50%. It is suitable for the detection of small strains and can detect throat vibration when speaking. On the other hand, the composite-based sensor has a large strain range of 0 ∼ 240% and excellent stability. After 1000 cycles of stretching-releasing at 50% strain, the resistance change rate remains unchanged. It is suitable for the detection of large strains. Moreover, the sensitivity and working range of the composite-based sensor can be adjusted by changing the ratio and total amount of AgNWs/AgMPs composites. It can accurately monitor the different bending angles of the elbow joint and a people's walking status and pace. The strain sensor prepared by this method has great practical value in wearable devices and electronic skin.
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
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Bio Materials
·
2021
·
IF 0
Xinrong Li,Yilin Song,Guihua Xiao,Enhui He,Jingyu Xie,Yuchuan Dai,Yu Xing,Yun Wang,Yiding Wang,Shengwei Xu,Mixia Wang,Tiger H. Tao,Xinxia Cai
Epilepsy detection and focus location are urgent issues that need to be solved in epilepsy research. A cortex conformable and fine spatial accuracy electrocorticogram (ECoG) sensor array, especially for real-time detection of multicortical functional regions and delineating epileptic focus remains a challenge. Here, we fabricated a polydimethylsiloxane (PDMS)–parylene hybrid, flexible micro-ECoG electrode array. The multiwalled carbon nanotubes (MWCNTs)/poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) nanocomposite-modified electrode interface significantly improved the sensing performance with low impedance (20.68 ± 6.65 kΩ), stable phase offset, and high sensitivity. The electrophysiological activities of multicortical brain regions (somatosensory cortex, parietal association cortex, and visual cortex) were simultaneously monitored during normal and epileptic statuses. The epileptic ECoG activities spread spatiotemporally from the starting point toward the adjacent cortex. Significant variations of the waveform, power, and frequency band were observed. The ECoG potential (123 ± 23 μV) at normal status was prominently up to 417 ± 87 μV at the spike wave stage. Besides, the power for epileptic activity (11.049 ± 4.513 μW) was 10 times higher than that (1.092 ± 0.369 μW) for normal activity. In addition, the theta frequency band was found to be a characteristic frequency band of epileptic signals. These joint analysis results of multicortical regions indicated that the active micron-scale region on the parietal association cortex was more likely to be the epileptogenic focus. Cortical mapping with high spatial detail provides the accurate delineation of lesions. The flexible micro-ECoG electrode array is a powerful tool for constructing a spatiotemporal map of the cortex. It provides a technical platform for epileptic focus location, biomedical diagnosis, and brain–computer interaction.
研究领域:
神经科学
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生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 3
·891-900
·
IF 2.2
Wang Hongyang,Yu Haiyang,Wang Junsheng,Li Ting-Ting,Lin Jia-Horng,Lou Ching-Wen
Cotton fabrics are susceptible to contamination in daily use. Herein, this study developed a scalable and benign strategy to impart superhydrophobic and photocatalytic properties to cotton fabrics by impregnating SiO 2 –TiO 2 Janus particles (SiO 2 –TiO 2 JPs) and silicone elastomer polydimethylsiloxane (PDMS). SiO 2 –TiO 2 Janus particles were synthesized by Pickering template method. The obtained cotton fabrics exhibited good superhydrophobic properties with a water contact angle (WCA) of 155° as well as mechanical and chemical stability. The modified fabrics maintained their superhydrophobic properties against 30 cycles of mechanical abrasion, 15 cycles of tape peeling, and 24 h of UV aging. They also had good resistance to n-hexane, acetone, acid/alkali liquids. The degradation efficiency of Rhodamine B (RhB) was up to 63% after 6 h of UV irradiation and still 48% after 5 cycles of degradation. The facile approach in favor of large-scale preparation showed promising potential for wide application of flexible, superhydrophobic cotton fabrics with self-cleaning performance.
研究领域:
材料科学
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纳米技术
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表面工程
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纺织工程
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 13
·e55161
·
IF 2.7
Haofei Sima,Bo Liu,Chunzu Cheng,Chunling Zhang
The construction of conductive network and the design of material structure are the key points of polymer-based shielding materials. Herein, we reported a MXene/PDMS composite foam material with adjustable cell structure and high efficiency electromagnetic interference (EMI) shielding. Few-layered MXene is used as a conductive filler to construct three-dimensional conductive networks by in situ chemical etching. Meanwhile, a series of polystyrene microspheres with different sizes were prepared by applying suspension polymerization method as templates to introduce different cell sizes and densities for PDMS-based materials. The density and EMI shielding performance of composites can be improved by adjusting the cell structure. Compared with the unfoamed MXene/PDMS composites, the composite foam in this work not only reduces the material density greatly but also improves the microwave absorption performance with smaller cell size. This method provides a simple and effective guide for changing material density and absorbing mechanism by introducing cell structure into polymer-based materials in the future.
研究领域:
材料科学
·
电磁干扰屏蔽
·
复合材料
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Chan Pei,Heng Mao,Yu-Jie Wang,Wei-Min Liu,Zheng-Zheng Li,Wen-Wen Xie,Yan Li,Zhi-Ping Zhao
Mixed matrix membranes (MMMs) have been shown great performance and remarkable stability for diverse molecular separations. Considering that the density of MOFs is usually higher than that of polymer doping solution, the upper separation layer surface of MMMs is enriched by the polymer matrix, compromising the membrane performance. In this study, the asymmetric separation layer of MOF-filled MMMs was etched by the long-distance and dynamic low-temperature (LDDLT) plasma for enhanced ethanol permselective pervaporation. The thickness of separation layer decreased and the MOF amount on surface increased after the LDDLT plasma etching, which dramatically reduced the molecular permeation resistance and improved the membrane performance. Under optimal plasma conditions, the etched MMMs exhibited the superior permeation flux of 1120 g·m −2 ·h −1 (60% more than that of unetched membrane) and the separation factor of 12.3 (1.16 times as much as that of unetched membrane) in separation of 5 wt% ethanol aqueous solution at 40 °C.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Yaqi Wang,Tanlong Xue,Zhihao Si,Chang Liu,Shuai Yang,Guozhen Li,Yan Zhuang,Peiyong Qin
Recently, the preparation of polymeric membranes by UV-induced polymerization is encouraged due to the ultrafast curing and controllable operation. However, the long-period exposure under UV light has a great threat to both the environment and operators. Herein, we developed the visible-light-induced polymerized PDMS membrane for the pervaporative separation of furfural . The differences among photoinitiator ethyl(2,4,6-trimethylbenzoyl)phenylphosphinate (TPO-L), diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) and 2-hydroxy-2-methylpropiophenone (1173) in the polymerization kinetics , membrane structure and separation performance are compared. Results show that the absorbance of TPO-L matches 405 nm of the visible light region; and it can be well dispersed and compatible with PDMS and obtain high initiation efficiency. Furthermore, the conditions including TPO-L concentration and PDMS viscosity are optimized, and the prepared membrane has an outstanding pervaporation performance containing 1299.5 g m −2 h −1 of total flux and 40.2 of furfural separation factor. Importantly, the ultrafast and continuous preparation process of membrane is operated by a home-made machine, indicating the wonderful potential for its large-scale application.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xiuting Li,Hongmei Liu,Chenjie Gu,Jinjie Zhang,Tao Jiang
The acquisition of a robust plasmonic substrate with both appreciable molecule anchoring and quantitative detection features is a prerequisite for the reliable adhibition of surface-enhanced Raman scattering (SERS) technology. Herein, an innovative sophisticated SERS substrate was proposed by spin-coating titanium dioxide (TiO 2 ) onto a flexible polydimethylsiloxane (PDMS) film followed by the modification of triangular silver (Ag) nanoplates through in-situ reduction. The absence of organic surfactants during this process rendered the substrate great opportunity in effectively enriching molecules and the assembly of TiO 2 and Ag made it a reusable and sensitive SERS platform. After a recyclable monitoring of 4-aminothiophenol (4-ATP) with different concentrations was carried out by reusing the hybrid substrate for 8 cycles, a limit of detection as low as 1.58 × 10 −9 M was achieved. The distinctive intrinsic Raman signal from PDMS matrix was further verified to successfully correct the poor detection linearity by serving as internal standard and the coefficient of linear correlation (R 2 ) was improved from 0.967 to 0.997. In this regard, the as-prepared multifunctional PDMS/TiO 2 /Ag hybrid substrate with simulation-estimated electromagnetic “hot spots” exhibited remarkable quantitative recyclable detection performance.
研究领域:
材料科学
·
分析化学
✓ 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）