JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 5
·5008-5013
·
IF 2.195
Du Liting,Liu Li,Tang Xiaonian,Li Yu,Xu Suyan,Gong Yimin,Yang Yang
Pure Fe 2 O 3 microspheres and Gd 2 O 3 /Fe 2 O 3 loose microspheres were synthesized successfully by a facile hydrothermal method and followed with calcined. The structure and elemental composition were provided by the X-ray powder diffraction (XRD) and energy-dispersive spectroscopy (EDS). Additionally, the morphology was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM), which show the loose surface state of Gd 2 O 3 /Fe 2 O 3 microspheres. Finally, the property of the gas-sensing sensor based on Gd 2 O 3 /Fe 2 O 3 loose microspheres was investigated systematically. It exhibits ultrahigh sensitivity of 268.6 to 100 ppm acetone at low operating temperature 220 °C, which is 9.8 times higher than the pure Fe 2 O 3 microspheres sensor (27.5/100 ppm). Remarkably, the response of Gd 2 O 3 /Fe 2 O 3 loose microspheres sensor to 0.1 ppm acetone is 2.3. Furthermore, the sensor shows fast response and recovery time (6/36 s) and splendid selectivity to acetone.
研究领域:
材料科学
·
传感技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 47
·17042-17049
·
IF 7.393
Chunhui Luo,Xinyue Deng,Shuai Xie
Designing skin-comparable conductive hydrogels has attracted tremendous interest, while it remains challenging to simultaneously achieve super-extensibility and ultra-sensitivity. Herein, a novel hydrogel was successfully fabricated to tackle this problem by using acrylamide (AM), flowerlike micelles (polyethylene glycol dilaurate) and sodium chloride (NaCl) as the monomer, cross-linker and conductive filler, respectively. The synergy of micelle deformation under external loads and chain entanglement between polyethylene glycol and polyacrylamide chains endowed the gel with an ultra-stretchable property (elongation at break of 155 mm mm−1). Meanwhile, the dipole–dipole interactions between ions and polymeric chains led to an ultra-sensitive capacity (gauge factor = 54.5, tensile strain > 20 mm mm−1), superior to those of most hydrogel-based sensors. Therefore, the obtained sensor could precisely monitor various human motions, including finger bending at different angles, speaking, walking and running. Additionally, the presence of ions (Na+ and Cl−) endowed the gel with excellent anti-freezing properties (128 mm mm−1 tensile strain at −20 °C). This work sheds light on the fabrication of high-performance sensors and will broaden their applications.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Chuan Cao,Peng Zhou,Jianqiao Wang,Miaoxuan Liu,Peng Wang,Yajun Qi,Tianjin Zhang
Flexible sensors and actuators are the basis for realizing the Internet of Everything. This study identifies specific interfacial polarization and filler dispersion challenges in flexible sensors. A novel sandwich-structured flexible sensor with polydimethylsiloxane (PDMS)-filled Nb 2 CT x as the interlayer and poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)]-filled barium titanate (BTO) as the upper and lower layers was designed and fabricated. The thickness of the interlayer was optimized to be 6.2 μm, resulting in an ultrahigh sensitivity of 16.05 V/N and ultrashort response time of 626 μs. The interlayer achieved an oriented arrangement of the dipoles in the upper and lower piezoelectric films through interfacial polarization, enhancing the piezoelectric output and sensitivity. The proposed mechanism was confirmed by the dielectric properties, local piezoelectric response, cross-sectional potential simulation, and interfacial electrical calculations. Additionally, the sensor effectively distinguishes various body movements, facial micro-expressions, and throat vibrations during vocalization, and can be applied to ultrahigh-sensitive self-powered flexible piezoelectric pressure sensors.
研究领域:
材料科学
·
电子工程
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Lei Jiang,Shu He,An Liu,Jie Zhang,Jia Liu,Sirui He,Wei Shao
Conductive hydrogels with multifunction have received significant attention in the field of wearable electronic devices, especially in strain sensors and pressure sensors . The high sensor sensitivity, flexibility and mechanical strength are the top three critical factors for manufacturing of trustworthy sensors for practical applications. However, the conductive hydrogels are subjected to some limitations due to the lack of self-repair ability when damaged by external force, the low electrical conductivity and weak mechanical strength. To address these issues, multifunctional conductive hydrogels incorporating MXene nanosheets and lignin amine-silver nanoparticles (LA-Ag NPs) were constructed via a dynamic redox system. Benefiting from the introduction of MXene and LA-Ag NPs, the hydrogels demonstrated strong adhesiveness, self-healing property and high conductivity. Notably, the epidermal sensors demonstrated high sensitivity over a broad range as both strain sensor (GF = 9.17) and pressure sensor (S = 0.33 kPa −1 ).
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yutong Wang,Sha Jiang,Jialiang Xie,Linlin Xie,Chuanliang Feng,Yongjie Wang,Guotao Xiang,Li Li,Yanhao Huang,Xianju Zhou,Feng Wang
Ratiometric luminescent thermometry is favored for its unique advantages and significant potential applications, particularly in the biomedical field. That has driven growing interest in the development of novel luminescent materials with ultra-high sensitivity in the physiological temperature range. Our study focuses on materials that exhibit temperature-induced phase transition within the physiological temperature range, thus facilitating the development of highly sensitive luminescent thermometers. Through a series of experimental explorations, we have discovered that LiYO 2 :1%Sm 3+ undergoes a phase transition from a monoclinic structure to a tetragonal structure within the temperature range of 320–330 K. Subsequently, a luminescent thermometer based on LiYO 2 :Sm 3+ phosphor was designed, capitalizing on the contrasting thermal response of the emissions associated with monoclinic and tetragonal structures, achieving ultra-high sensitivity of 17.51% K −1 at 322 K, making it suitable for the application in the biomedical field. Especially, the optimal temperature range for LiYO 2 : Sm 3+ thermometer aligns well with mitochondrial temperature, presenting potential applications in cancer diagnosis and photothermal therapy.
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
Nano Research
·
2023
·Vol. 16
·期 12
·13366-13374
·
IF 9.9
Lin Chaoxin,Kim Kumchol,Wang Zuochao,Yan Zhuang,Tang Zhiyong,Liu Yaling
Integration and synergy of the unique functions of different components have been developed into one of the most convenient and effective ways to construct the composite advanced materials with collective properties and improved performances. In this work, the mace-like tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ)/HKUST-1 composite structures with single single-crystalline TTF-TCNQ submicrorods covered by ordered HKUST-1 nanosheet arrays were successfully constructed by an efficient TTF-TCNQ seed-mediated growth approach. Impressively, thanks to the synergetic and complementary effects between TTF-TCNQ and HKUST-1, the sensors based on such mace-like TTF-TCNQ/HKUST-1 composite structures not only displayed an experimental detection limit of 10 part per billion (ppb) for NO 2 detection, but also exhibited outstanding selectivity even if the concentration of the interfering gases was 10 times that of NO 2 . Meanwhile, good reproducibility and rapid response were also achieved. This work opens the avenue for creation of novel high-performance sensing materials for application in gas sensing.
研究领域:
材料科学
·
化学传感
·
纳米技术
·
气体传感器
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Shunyong Wei,Ming Yang,Hui Sun,Faming Li,Fei Xiao,Jihua Zou,Aobo Ren,Yixuan Huang,Zhihui Xiong,Liming Yuan,Hao Xu,Tixian Zeng,Jiang Wu,Zhiming M. Wang
CdSe single crystals (SCs), with a relatively high atomic number, large X-ray absorption coefficients, and high carrier mobility, are expected to provide high-performance detection for X-ray. However, the difficulty of growing high-quality CdSe SC has severely limited its application in X-ray detection. In this work, we develop an unconstrained physical gas phase method and in situ annealing process to grow high-quality CdSe SCs under unconstrained conditions. Using this method, CdSe SCs exhibit natural exposure planes, ultrahigh resistivity of 5.43 × 1012 to 1.29 × 1013 Ω cm and high μτ product of 1.3 × 10–2 to 1.5 × 10–2 cm2 V–1. It is also observed that CdSe SC X-ray detectors exhibit a record sensitivity of 2.08 × 105 μC Gyair–1 cm–2 and a low detection limit of 85 nGyair s–1, which are both desired in medical diagnostics. Moreover, those devices with different crystal directions provide anisotropic X-ray detection performance. Our findings pave a new avenue to exploit high-performance CdSe SC X-ray detectors.
研究领域:
材料科学
·
医学影像
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2022
·Vol. 25
·期 1
·2200814
·
IF 4.122
Yu-Dong Tang,Peng Wang,Guo-Xian Li,Guo-Yuan Wang,Wei Yu,Chui-Zhou Meng,Shi-Jie Guo
Flexible pressure sensors have broad applications in the fields of electronic skin, human–computer interaction, and health monitoring. It remains a great challenge to develop advanced sensors with mechanical flexibility while gaining high sensitivity, fast response time, and wide detection range. Herein, the design and fabrication of a new type of flexible supercapacitive pressure sensor with a device configuration of planar electrodes incorporated with porous ionic gel is reported. Taking advantage of both the electric double layer capacitance and the micro-structured organogel electrolyte, the developed sensor exhibits ultra-high sensitivity (1126.96 kPa −1 ), wide detection range (300 kPa), fast response time (25 ms), and excellent stability over 6000 compression-release cycles. With consistent and stable performance, the proposed pressure sensor can be used in many applications such as finger pressing, carotid pulse measurement, and finger bending. This work provides a facile and economical approach for fabricating flexible and ultra-sensitive pressure sensors that are promising in wearable electronics.
研究领域:
材料科学
·
生物医学工程
·
柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
Biosensors-Basel
·
2025
·Vol. 15
·期 4
·241
·
IF 5.6
Haiyang Yu,Yue Wang,Yang Xu,Wenchao Zhou,Yihui Wu
Optical microfiber biosensors demonstrate exceptionally ultra-high sensitivity at the dispersion turning point (DTP). However, the DTP is highly susceptible to variations in dimensional and external environmental factors, and the spectral response is mismatched from preparation in air to application in a liquid environment, making the DTP difficult to control effectively. In this work, we propose a method that bridges the relationship between the interference spectra of air and aqueous environments. By counting the interference peaks in air, we can accurately predict the DTP position in liquids. Meanwhile, it provides a new balance between sensitivity and wide linear dynamic range, achieving wide dynamic range detection across various concentrations. The optical microfiber coupler (OMC) is fabricated using the hydrogen–oxygen flame melting tapering method. In addition, the concentration, temperature, and solvent used for the sensor’s biofunctional layer are optimized. Finally, in refractive index sensing, a maximum sensitivity of 1.17 × 105 ± 0.038 × 105 nm/RIU is achieved. For biosensing, a wide dynamic range detection of cardiac troponin I (cTnI) is realized at concentrations of 12–48 ng/mL, 120–480 pg/mL, and 120–480 fg/mL.
研究领域:
光学工程
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Qiuping Qian,Yan Wang,Min Zhang,Limin Chen,Jie Feng,Yi Wang,Yunlong Zhou
We report a facile, low cost and readily scalable method for the fabrication of a flexible paper-based strain sensor. Approaches of pen-writing, paper-transferring and elastomer-packaging were exploited to build a strain sensor with layered structures consisting of the graphene mesh and conductive polyaniline . The normalized conductivity change ( Δ G / G 0 ) and gauge factor could reach as high as 747 and 1.1 × 10 4 , respectively. The mechanism of ultra-high conductivity change was attributed to the formation of micro-disconnection and micro-cracking in the layered structure deduced by Raman imaging and a simulation based on equivalent resistor networks . As a proof of the concept, the strain devices were finally exploited in sign language recognition. Our work demonstrated a new strategy to create ultra-high sensitive communication devices for people with speech and hearing impairment.
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
ANALYTICAL SCIENCES
·
2023
·Vol. 39
·期 4
·565-571
·
IF 1.6
Li Dandan,Wen Qilin,Zhou Yanyu,Li Dan,Xi Huai,Huang Guidan,Liang Jinhua,Xiao Xiaofen,Zhu Wenyuan
Mercury ion (Hg 2+ ) is the most widespread and highly toxic environmental pollutant, which exerts numerous adverse effects on environmental and human health. There is an urgent need to develop a convenient method for detecting Hg 2+ . Herein, a novel dual-mode sensor based on colorimetric and Tyndall effect of gold nanoparticles was developed for ultra-sensitive determination of Hg 2+ . In this strategy, a polyA-modified Au probe with high uniformity was assembled successfully. Both modes were based on Hg 2+ -induced aggregation of the probes. Hg 2+ was reflected according to the color variations of solution and the Tyndall effect of Au reporter. With the aid of a laser pointer, the Tyndall mode demonstrated about 615-fold improvement on sensitivity compared with the colorimetry way. Taking advantages of low cost and convenient assembly of polyA-based Au probe and the combination of colorimetry and Tyndall effect, our strategy determined the Hg 2+ with high sensitivity and wide range. By changing probes or nanoparticles, the proposed strategy is expected to be a universal platform for detecting other analytes in environmental and even biological samples. Graphical abstract A novel dual-mode sensor based on colorimetric and tyndall effect of gold nanoparticles for ultra-sensitive determination of Hg2+ was exploited.
研究领域:
环境科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 3
·1-9
·
IF 5.705
Wang Wei,Jayachandran Silambarasan,Li Mengru,Xu Shenghao,Luo Xiliang
An electrochemical biosensor for the detection of microRNA was prepared via chemical grafting of a Methylene Blue labeled reporter (MB-Rep) duplex onto a nanostructured surface that was obtained by electrodeposition of cobalt oxide and poly(o-phenylenediamine). This is followed by the attachment of hyaluronic acid and gold nanoclusters. In the presence of the target (microRNA), the probe-target duplex and the MB-Rep hairpin are formed. These will displace the labeled reporter from the sensor surface, and this results in a decrease of the amperometric signal for MB at a typical working voltage of −0.28 V (vs. Ag/AgCl). The electrode modified with hyaluronic acid possesses a large electroactive surface area and an excellent antifouling property. This makes it useful for ultrasensitive quantitation of microRNA even in complex biological media. The sensor has a linear response in the 100 f. to 0.1 μM microRNA concentration range, and a 33.3 f. detection limit. It was successfully applied to the determination of microRNA in cancer cells.
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研究领域:
生物化学
·
电化学
·
纳米技术
·
癌症诊断
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）