CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhonghe Wei,Xiaodan Li,Xiaohong Cai,Xuqiang Zhuang
A wearable sensing device, it not only has good breathability to ensure long-term wearing comfort but also needs to have waterproof ability to avoid sweat erosion. However, most reported works only have breathability or waterproof ability, which greatly limits their application. Herein, we designed and fabricated a water-resistant and breathable sensor based on non-woven fabric via the simple methods of 3D direct writing and spray coating. The sensing principle of supercapacitive and the micro uneven structure of fibers endows the sensor with high sensitivity (77.19 kPa −1 ), wide detection range (0–65 kPa), fast response speed (within 50 ms), cycle stability (over 10,000 cycles). The stearic acid (STA) coating method enables the sensor with excellent hydrophobicity (water contact angle of about 160.9°) and waterproof ability that can work normally in humid environments and even underwater. Benefiting from the natural micropore structure of fibers, the sensor demonstrates excellent air permeability (359.4 mm s −1 ). As a result, the fabric-based sensor can monitor human motions, and physiological signals and recognize gestures in the normal open-air and underwater environment, demonstrating its huge potential in underwater 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 AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Chuanyu Yang,Peitong Yu,Ying Li,Junyang Wang,Xinyue Ma,Ni Liu,Ting Lv,Hongru Zheng,Han Wu,Hongxia Li,Chunyan Sun
Lead contamination has posed a potential threat to the environment and food safety, arousing extensive concern. In this work, we fabricated a novel fluorescent sensing platform based on zeolitic imidazolate framework-8 (ZIF-8) and DNAzyme for monitoring Pb2+ in water and fish samples. ZIF-8 was proposed as a fluorescence quencher with the advantages of simple synthesis, low cost, and high quenching efficiency. The Pb2+-dependent GR5 DNAzyme containing the large ssDNA loop can be adsorbed onto ZIF-8 accompanied by fluorescence quenching. Upon binding with Pb2+, GR5 DNAzyme was activated and cleaved, leading to the release of FAM-labeled 5-base ssDNA, which restored the fluorescence. The “turn-on” assay can detect Pb2+ through the one-pot procedure in the range of 0.01–10.0 nM with a detection limit of 7.1 pM. The platform is promising for on-site monitoring of Pb2+ owing to the excellent performance of high sensitivity, low background, strong anti-interference ability, and simple operation.
研究领域:
分析化学
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环境科学
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生物技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chunmei Yang,Didi Gu,Xin Zhu,Pan Han,Liping Pan,Xiaoling Che,Xinyao Chen,Qiuyu Meng,Guidong Dai,Lu Yang
Spectral CT can overcome the shortcomings of conventional CT, however, clinically used iodized contrast agents are not ideal for spectral CT imaging, which calls for the development of novel contrast agent with high attenuation coefficient. In this study, a small molecule lanthanide chelate Ytterbium-tetraazacyclododecane-1,4,7,10-tetraacetic acid (Yb-DOTA) was prepared by a simple and green one-step method, and it had multi-advantages such as good stability, excellent biocompatibility and high performance of spectral CT imaging in vitro and in vivo. In addition, Yb-DOTA had more prominent ability to visualize renal tissue, GI tract, the heart and venous system in both conventional and spectral CT imaging compared with clinical iohexol. Moreover, higher tissue contrast and enhanced sensitivity were achieved at high monochromatic energies (70–150 keV) after Yb-DOTA administration, indicating its superior spectral CT imaging performance. Yb-DOTA is expected to be a novel contrast agent to enhance the diagnostic sensitivity and accuracy.
研究领域:
医学影像学
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分子影像
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yueli Liu,Hongbing Guo,Aohan Mei,Keqiang Chen,Wen Chen
Recently, all-inorganic halide perovskite materials have attracted much attention in the fields of humidity sensor due to their sensitive surface, tunable bandgap, high conductivity and excellent carrier mobility. However, their inherent instability and limited sensitivity restrict further application in electronic devices. Herein, we demonstrate a high-performance impedimetric humidity sensor based on an all-inorganic halide perovskite Cs 4 PbBr 6 nanocrystals (NCs), which are obtained by anti-solvent method without long chain ligands. It is found that V Br ∙ defects act as the active site to enhance the ability of adsorbing water molecules. The humidity sensor of Cs 4 PbBr 6 NCs achieves high response value over 4 orders of magnitude at 11–98 % relative humidity, short response/recovery time (8 s/6 s), favorable repeatability, excellent selectivity and good long-term stability. Moreover, high humidity sensing performance enables the humidity sensor of Cs 4 PbBr 6 NCs to possess great potentials in breath monitor and noncontact switch application.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 22
·11980-11989
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IF 12.732
Zhuo Liu,He Lv,Ying Xie,Jue Wang,Jiahui Fan,Baihe Sun,Lin Jiang,Yang Zhang,Ruihong Wang,Keying Shi
Very diverse two-dimensional (2D) materials have bloomed in NO2 gas sensing applications, which provides new opportunities and challenges in function oriented gas sensors. In this work, a 2D/2D/2D structure of the Ti3C2Tx@TiO2@MoS2 composite was well designed via a facile one-step hydrothermal route, in which TiO2 nanosheets are in situ grown on ultrathin and highly conductive Ti3C2Tx MXene. Simultaneously, the few-layer and vertically oriented MoS2 nanoflakes rich in active edge-sites were uniformly distributed in the composite. Ti3C2Tx MXene and MoS2 act respectively as the electron reservoir and main sensitive material. The strong interfacial contact in different components facilitated the transfer of charge carriers and their spatial separation. Integrating the unique structural and electronic properties, the as-prepared Ti3C2Tx@TiO2@MoS2 sensor exhibited a remarkable gas sensing performance at room temperature (Ra/Rg = 55.16, 50 ppm NO2), which is 7.3, 3.8 and 2.1 times higher than that of pristine MoS2, TiO2@MoS2 and Ti3C2Tx@MoS2 composites, respectively. It also achieved ultrafast response time (1.8 s), more than 90% recoverability, low detection limit (23 ppb), dedicated selectivity and as long as eight-week stability.
研究领域:
材料科学
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传感器技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
Chemosensors
·
2022
·Vol. 10
·期 11
·464
·
IF 4.229
Zhaonan Hou,Zhiyan Ma,Xin Guan,Hongran Zhao,Sen Liu,Teng Fei,Tong Zhang
Humidity sensors with high sensitivity and fast response characteristics are of great interest for researchers. In this work, capacitive humidity sensors were fabricated using ionic liquid/cellulose nanofibers (CNFs) as the composited sensing film. The porous CNFs are beneficial for preparing sensing films via a solution process, and the ionic liquid could be uniformly dispersed in the films. The humidity-sensing performance of the as-prepared sensors was investigated. The optimized sensor showed a high response (27.95 pF/% RH) in a wide humidity range (11–95% RH) and a fast response speed in the adsorption process (the recovery time was only ~1 s). The high response of the sensors was attributed to the polarization at the interface between the electrolyte and the metal electrode, while the fast recovery was due to the rapid desorption of water molecules on the sensing films. Finally, the application of the obtained sensors in human breath monitoring was explored.Keywords:humidity sensor;high sensitivity;fast recovery;breath monitoring
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 13
·2219
·
IF 5.719
Haoyuan Cai,Mengwei Wang,Zhuohui Wu,Jing Liu,Xiaoping Wang
We investigate a high-sensitivity surface plasmon resonance (SPR) biosensor consisting of a Au layer, four-layer MoS2, and monolayer graphene. The numerical simulations, by the transfer matrix method (TMM), demonstrate the sensor has a maximum sensitivity of 282°/RIU, which is approximately 2 times greater than the conventional Au-based SPR sensor. The finite difference time domain (FDTD) indicates that the presence of MoS2film generates a strong surface electric field and enhances the sensitivity of the proposed SPR sensor. In addition, the influence of the number of MoS2layers on the sensitivity of the proposed sensor is investigated by simulations and experiments. In the experiment, MoS2and graphene films are transferred on the Au-based substrate by the PMMA-based wet transfer method, and the fabricated samples are characterized by Raman spectroscopy. Furthermore, the fabricated sensors with the Kretschmann configuration are used to detect okadaic acid (OA). The okadaic acid–bovine serum albumin bioconjugate (OA-BSA) is immobilized on the graphene layer of the sensors to develop a competitive inhibition immunoassay. The results show that the sensor has a very low limit of detection (LOD) of 1.18 ng/mL for OA, which is about 22.6 times lower than that of a conventional Au biosensor. We believe that such a high-sensitivity SPR biosensor has potential applications for clinical diagnosis and immunoassays.Keywords:biosensor;MoS2;graphene;SPR sensor;high sensitivity
研究领域:
生物医学工程
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材料科学
·
光学传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 9
·2109149
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IF 18.808
Jinming Wu,Lixiang Wang,Anbo Feng,Shuang Yang,Ning Li,Xiaomei Jiang,Nianqiao Liu,Shengdan Xie,Xinbo Guo,Yanjun Fang,Zhaolai Chen,Deren Yang,Xutang Tao
Self-powered perovskite X-ray detectors have drawn increasing attention due to the merits of low noise, low power consumption as well as high portability and adaptability. However, the active layer thickness is usually compromised by the small carrier diffusion length, which leads to inefficient X-ray attenuation and hence low sensitivity of the detectors. Herein, self-powered and highly sensitive single-crystal perovskite X-ray detectors are achieved by finely controlling the crystal thickness and optimizing their carrier transport properties. Perovskite single crystals with thickness of around 800 µm are grown by a two-step crystal growth process to realize the full attenuation of hard X-ray with the energy of 80 keV. And the incorporation of formamidinium (FA) (FA = CH(NH 2 ) 2 + ) cation into methylammonium lead triiodide (MAPbI 3 ) (MA = CH 3 NH 3 + ) increases the mobility-lifetime (µτ) product of the single crystals by nearly one order of magnitude, leading to a record X-ray detection sensitivity of 8.7 × 10 4 µC Gy air −1 cm −2 under zero bias. Moreover, the eliminated external bias and reduced trap density weaken the field-driven ion migration effect, and therefore result in a low detection limit of 27.7 nGy s −1 . This work represents an effective way to achieve self-powered perovskite X-ray detectors with both high sensitivity and low detection limit.
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
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IF 6.864
Haijun Liu,Hanyang Gao,Guoxin Hu
Uniform dispersion of pristine graphene in polymers has always been a difficulty in the research and industry. In this paper, a simple but effective method was used to uniformly disperse the pristine graphene in NR matrix to prepare an NR/pristine graphene composite. The conductivity of this composite with 5 wt% graphene loading fraction was ∼0.005 S/m, around 4 orders of magnitude higher than that prepared by other methods with a similar loading fraction. The gauge factor (GF) of the strain sensor using the as-prepared composite as the component could be as high as 46, taking a lead positon in the reported strain sensors. Owing to the high sensibility, the sensor was suitable to be used for the detection of very subtle motions such as breathing or heartbeat. In a wrist-pulse testing, premature beats, less forceful heartbeats, and the “P”“T”“D″ waves of the heartbeats could be precisely monitored and distinguished. Swallowing and vocalization could also be efficiently detected by attaching the sensor on the subject's throat.
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
CARBON
·
2018
·
IF 7.082
Kai Huang,Shaoming Dong,Jinshan Yang,Jingyi Yan,Yudong Xue,Xiao You,Jianbao Hu,Le Gao,Xiangyu Zhang,Yusheng Ding
A graphene-based elastomer for sensors with tunable and high sensitivity was fabricated by using three-dimensional printing, in which a printable ink was developed by homogenizing graphene and polydimethylsiloxane (PDMS). To make the elastomer tunable and highly sensitive, different microstructures of three-dimensional graphene-PDMS (3DGP) can be formed. Attributed to its well-interconnected scaffolds and designed microstructures, 3DGP demonstrates a series of multifunctional properties, such as excellent stability and a large gauge factor (up to 448 at 30% strain). 3DGP has continuously stable piezoresistive behavior, even after 100 compress-release cycles under 10% strain. By considering the essential properties of 3DGP scaffolds, such as filament diameter , interaxial angle and interlayer space , the printed 3DGP structure can be tunable and highly sensitive. The controllable design and scalable fabrication of the 3DGP advanced functional material suggests that tunable strain sensors and wearable devices have great potential for different applications, which is a finding that can be referenced by future studies on 3D graphene-based sensors.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Jing Sun,Wei Xiong,Jiawei Zhang,Yong Zhang,Bin Xie
The power consumption of the chemical resistive gas sensor should be considered when its performance is developed. One of the most effective methods for reducing the power consumption is to make the gas sensor work at room temperature. A tin disulfide (SnS 2 ) nanoparticle-based gas sensor with high sensitivity and fast recovery is proposed in this paper for detecting the nitrogen dioxide (NO 2 ). The experimental results show that the SnS 2 nanoparticle-based gas sensor has excellent gas sensing performance at room temperature, including high sensitivity, rapid response/recovery speed (28 s/1 s), high selectivity and good repeatability and reversibility. The main reason for the excellent performance of the SnS 2 nanoparticle-based gas sensor is mainly attributed to the unique physical affinity and favorable electronic band positions of the SnS 2 material, which promotes the physisorption and charge transfer of NO 2 gas molecules. It is expected that this work can provide guidance for the real-time rapid detection of NO 2 at room temperature.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 2
·407
·
IF 3.5
Yingzhen Zhang,Jun Xiao,Ruiying Peng,Xueliang Feng,Haimei Mao,Kunming Liu,Zhenzhong Liu,Chunxin Ma
The detection of highly toxic chemicals such as phosgene is crucial for addressing the severe threats to human health and public safety posed by terrorist attacks and industrial mishaps. However, timely and precise monitoring of phosgene at a low cost remains a significant challenge. This work is the first to report a novel fluorescent system based on the Intramolecular Charge Transfer (ICT) effect, which can rapidly detect phosgene in both solution and gas phases with high sensitivity by integrating a benzo[1,2-b:6,5-b’]dithiophene-4,5-diamine (BDTA) probe. Among existing detecting methods, this fluorescent system stands out as it can respond to phosgene within a mere 30 s and has a detection limit as low as 0.16 μM in solution. Furthermore, the sensing mechanism was rigorously validated through high-resolution mass spectrometry (HRMS) and density functional theory (DFT) calculations. As a result, this fluorescent probing system for phosgene can be effectively adapted for real-time, high-sensitivity sensing and used as a test strip for visual monitoring without the need for specific equipment, which will also provide a new strategy for the fluorescent detection of other toxic materials.
研究领域:
化学
·
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）