MATERIALS LETTERS
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2023
·
IF 3
Jianfeng Tan,Weijia Ma,Gaoxiang Meng,Congkui Tian,Yin Wang,Yan Wang,Zhuo Liu
Room temperature (RT) gas sensors have been widely studied because of their low power consumption and easy integration. The low response value and long response/recovery time of gas-sensitive materials have hindered the development of RT gas sensors. In this paper, Bi-doped SnS 2 nanoflowers with high surface area were tailored by a novel hydrothermal method. A fast response/recovery speed of 52/100 s and high response (5.58) were obtained from 3 % Bi doped SnS 2 nanoflower for 1 ppm NO 2 . This work provides a strategy to fabricate RT gas sensors based on layered metal sulfide.
研究领域:
材料科学
·
环境监测
✓ 已验证
DOI
高影响因子
Materials
·
2017
·Vol. 10
·期 5
·535
·
IF 2.654
Min Yin,Fang Yang,Zhaojie Wang,Miao Zhu,Ming Liu,Xiuru Xu,Zhenyu Li
One-dimensional SnO2- and Li+-doped SnO2porous nanofibers were easily fabricated via electrospinning and a subsequent calcination procedure for ultrafast humidity sensing. Different Li dopant concentrations were introduced to investigate the dopant’s role in sensing performance. The response properties were studied under different relative humidity levels by both statistic and dynamic tests. The best response was obtained with respect to the optimal doping of Li+into SnO2porous nanofibers with a maximum 15 times higher response than that of pristine SnO2porous nanofibers, at a relative humidity level of 85%. Most importantly, the ultrafast response and recovery time within 1 s was also obtained with the 1.0 wt % doping of Li+into SnO2porous nanofibers at 5 V and at room temperature, benefiting from the co-contributions of Li-doping and the one-dimensional porous structure. This work provides an effective method of developing ultrafast sensors for practical applications—especially fast breathing sensors.Keywords:humidity sensor;electrospun porous nanofibers;lithium doping;response-recovery behavior
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 34
·期 10
·105707
·
IF 3.953
Xiangrui Bu,Qiang Wu,Yubin Yuan,Haiyang Wu,Weihua Liu,Xin Li,Chuanyu Han
Ethanol is a harmful volatile organic compound (VOC) for human health. Currently, zinc oxide (ZnO) is one of the most popular metal oxide semiconductors for VOCs detection but suffering from a lack of selectivity, poor response, and slow response/recovery speeds. Herein, we successfully synthesized the ZnO/Ti3C2Tx nanocomposites via a facile hydrothermal method, in which ZnO nanoparticles were uniformly grown on two-dimensional (2D) Ti3C2Tx nanosheets. As a result, the ZnO/Ti3C2Tx nanocomposites showed a significant improvement in the ethanol-sensing performance, when it compared to the pure ZnO and Ti3C2Tx samples. In particular, ZnO doped with 5 mg of Ti3C2Tx showed an ultra-high response (79) to 100 ppm ethanol, a short response/recovery time (22 s/34 s to 50 ppm ethanol), a low limit of detection (1 ppm) and a long-term stability. The excellent ethanol sensing properties are mainly attributed to the coupling effect between ZnO and Ti3C2Tx of composites. The ZnO nanoparticles are uniformly distributed on the 2D Ti3C2Tx platform, which can provide more gas adsorption sites. Simultaneously, the presence of hybrid heterojunctions further enhances the response in the sensing process.
研究领域:
材料科学
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传感技术
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纳米技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Shuai Liang,Xiaowei He,Fei Wang,Wangchang Geng,Xin Fu,Jing Ren,Xingmao Jiang
LiCl–Pebax 2533 composite nanofibers with different amounts of LiCl·H 2 O have been successfully synthesized by an electrospinning method. Humidity sensing properties, including the impedance versus relative humidity (RH), humidity hysteresis, and response and recovery time of these composites have been investigated. These results indicated that LiCl-added material possessed higher humidity sensitivity and LiCl–Pebax 2533 composite with LiCl·H 2 O content at 44.4 wt% displayed the best humidity sensing property. The impedance of the sensor changed nearly four orders of magnitude when the relative humidity changed from 11% RH to 95% RH and the hysteresis can be neglected. Furthermore, the response and recovery time of the sensor was 30 s and 80 s, respectively. Humidity sensing mechanism was analyzed by complex impedance spectra and the corresponding equivalent circuit.
研究领域:
材料科学
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传感器技术
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纳米材料
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生物医学工程
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环境监测
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2021
·
IF 2.328
Fanpu Meng,Jinyong Hu,Can Liu,Yuming Tan,Yong Zhang
In this work, the gas sensors based on LnFeO 3 nanocrystallines with different lanthanide (Ln = Yb, Tm, and Er) are fabricated to investigate the effect of lanthanide on acetone sensing performances. The experimental results revealed that the gas sensor based on YbFeO 3 nanocrystallines exhibited the best response ability and selectivity toward acetone gas. The YbFeO 3 gas sensor exhibits rapid response/recovery characteristic (18/25 s, 10 ppm acetone), and the detection limit can reach to be 500 ppb. The enhanced gas-sensing performance of YbFeO 3 based sensor is mainly contributed to the lanthanide with low binding energy of the Ln O bond.
研究领域:
材料科学
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纳米技术
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传感器与执行器
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·10279-10286
·
IF 9.9
Liu Hang,Qin Jinxu,Yang Xigui,Lv Chaofan,Huang Wentao,Li Fukui,Zhang Chuang,Wu Yanran,Dong Lin,Shan Chongxin
Humidity sensors with high sensitivity, rapid response, and facile fabrication process for contactless sensing applications have received considerable attention in recent years. Herein, humidity sensors based on hexagonal boron nitride (h-BN) nanosheets that are synthesized by a facile ultrasonic process have been fabricated, which display an ultrahigh sensitivity of 28,384% at 85% relative humidity (RH), rapid response/recovery time (3.0/5.5 s), and long-term stability in a wide humidity detection range (11%–85% RH), superior to most of the reported humidity sensors. The high sensitivity can be ascribed to the massive hydrophilic functional groups absorbed on the h-BN nanosheet surface. Benefiting from the high humidity sensing performances, contactless Morse code messaging and human writing and speech recognition have been demonstrated. This work demonstrates the great potential of the high-performance h-BN nanosheet-based humidity sensors for future contactless sensing devices.
研究领域:
材料科学
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传感器技术
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纳米技术
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应用物理
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 7
·1319-1325
·
IF 2.598
Xiang Di,Lin Huiming,Ma Jie,Chen Xiang,Jiang Jingjie,Qu Fengyu
In order to enrich the variety of zinc oxide (ZnO), well-defined porous ZnO hollow microspheres (PZHM) by a mass of nanoparticles were successfully synthesized through a simple solvothermal method. Zinc acetate and 1,2-propylene glycol was used as zinc source and solvent respectively
to fabricate PZHM without the assistance of any surfactant. Upon changing the amount of zinc acetate and 1,2-propylene glycol, the morphology of the samples could be adjusted. PZHM, with 1–2 μm in diameter and 200–300 nm in wall thickness, were found to be composed of
nanoparticles that assembles to form the large surface area and highly porous samples. Gas sensing performances of the ZnO hollow spheres have been investigated, showing high sensitivity (S = 180 at 1000 ppm), low detection limit (1 ppm), fast response/recovery (8/9 s), and very good
selectivity.
研究领域:
材料科学
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纳米技术
·
化学传感器
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
·
IF 8.4
Chong Li,Ran Tao,Zhiqiong Li,Jiahui Liao,Chen Fu,Jikai Zhang,Huiling Ong,Chenze Lu,Jingting Luo,Yongqing Fu
Humidity sensing is crucial for food production, environmental monitoring, microelectronic manufacture, and common living conditions. Thus, there is a high demand for development of high-performance humidity sensors with good stability, high precision and fast responses. In this study, Love wave mode humidity sensors were prepared using quartz-based SAW devices coated with composite sensing layers of accordion-like Ti 3 C 2 T x , MoS 2 nanoflowers and MoS 2 @Ti 3 C 2 T x hierarchical structure, respectively. The hydrophilic Ti 3 C 2 T x was used to provide abundant surface functional groups for adsorption of water molecules, and the hydrophobic MoS 2 enabled rapid adsorption and desorption of water molecules from the surface of MoS 2 @Ti 3 C 2 T x . The MoS 2 @Ti 3 C 2 T x coated Love wave humidity sensor presented an ultra-high sensitivity of 0.67 kHz/% RH in the wide humidity range from 11.3% RH to 97.3% RH, mainly attributed to the hierarchical structure of MoS 2 @Ti 3 C 2 T x with large specific surface areas, abundant adsorption sites and superhydrophilicity. Meanwhile, this Love wave humidity sensor showed fast response/recovery rates, great repeatability and long-term stability, indicating its great prospects in humidity detection applications.
研究领域:
材料科学
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传感技术
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环境监测
·
微电子
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
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2022
·
IF 10.508
Shixiang Zhou,Li Yao,Hui Mei,Konstantinos G. Dassios,Laifei Cheng,Litong Zhang
Chiral-rotating gas sensing structures composed of chemiresistive-sensitized SiCuOC have been presented to provide a facile method for reducing the thermal expansion of gas sensors working at high temperatures. The structures can disperse thermal stress by heat-induced torsion of their units while maintaining the dimensional stability of the integral construction. Vat photopolymerization constructed Cu-doped SiOC substrates with a high resolution, while Ag-doped CuO nanoclusters further modified them. Taking advantage of the synergistic sensitization effect of the substrate and the surface sensing layer, the structure exhibited a high response/recovery speed (24/32 s) and a response value of 54.45% to 100 ppm acetone; 97.19% of its initial response was maintained after a long-term detection. The thermal expansion coefficient of the sensing structure reached 1.04 × 10–6/K at the working temperature, revealing a near-zero expansion. Compressive strength and Young’s modulus of the structures were 31.93 MPa and 3.38 GPa, respectively. Meanwhile, the structures realized regular gas detection under pressure (85.02 kPa) and thermal (325 °C) loading, as their high deformation resistance protected the integrity and connection of the surface sensing layer. Thus, the work proved the dimensional stabilization effect of chemiresistive sensing structures with chiral-rotating design, realizing stable gas detection in complex loading environments.
研究领域:
材料科学
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化工
·
传感器技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 19
·6702-6709
·
IF 4.39
Qiuci Yu,Yuchi Zhang,Yan Xu
Metal oxide-based gas sensors have drawn tremendous research interests owing to their various compositions and selective and improved performance. However, the development of a targeted metal oxide with controlled microstructures via a facile preparation procedure is still a challenge. In this work, hierarchical BiFeO3 nano-microstructures are successfully developed through the post-modification of Bi3+ encapsulation with Fe-based Prussian blue microcubes followed by a sequential annealing strategy. The microstructures of the hierarchical BiFeO3 architectures can be effectively modulated by tuning various thermolysis temperatures. Among them, the hierarchical hollow BiFeO3 microcubes assembled from ultrathin nanosheets exhibit optimum acetone selective sensing performances with a gas response value (Ra/Rg) of 5.2 at 240 °C, rapid response/recovery times (10 s/9 s), and excellent long-term stability (for at least 30 days). The high and reproducible acetone-sensing properties are mainly attributed to the unique interior loose and porous structures with good permeability. The corresponding acetone sensing mechanism relying on the microstructure of BiFeO3 was also discussed. This work highlights the key role of morphological evolution in the fabrication of multi-functional multimetal oxides, and thus offers new opportunities for the rational design of novel gas sensing materials.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
化学传感器
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Lanlan Guo,Yanji Feng,Feng Shi,Wei Zhao,Hua Zeng,Tingyu Chen,Yingli Yang,Guodong Wang,Xiaolian Liu,Yan Wang,Xueli Yang
In this work, pure NiO, Al-doped NiO, W-doped NiO and a series of Al/W co-doped NiO nanoflowers were successfully prepared through a simple solvothermal method . Various characterization methods, such as XRD , SEM, TEM, HRTEM and XPS , were used to confirm the physical and chemical properties of the sensitive materials in terms of micro-nano structures, compositions and elemental distributions. The as-obtained Al/W co-doped NiO showed a nanoflower structure with an approximate size of ∼ 200 nm. What's more, among six sensors constructed from the sensitive materials, the sensor based on 3 at% Al 3+ /3 at% W 6+ co-doped NiO (3Al3W-NiO) achieved the highest response (R g /R a =112) toward 100 ppm triethylamine with a low detection limit (1 ppm) at 325 ℃. Besides, this sensor also exhibited excellent response/recovery characteristics and long-term stability. These favorable sensing performances of the 3Al/3 W co-doped NiO sensor are not only modulated by the initial resistance (R a ), but are also closely related to the large specific surface area , porous structures , low crystallinity , rich oxygen vacancies and high Ni 3+ /Ni 2+ ratio in the composite nanomaterials.
研究领域:
材料科学
·
纳米技术
·
化学传感器
·
气体传感
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xueyan Wang,Baoyu Huang,Xiaofang Wu,Ding Gu,Xiaogan Li
Two-dimensional reduced graphene oxide (rGO) nanosheets were pre-sulfonated and further incorporated by WS 2 nanoflakes to form S-rGO/WS 2 heterojunctions by hydrothermal synthesis. The sulfonation and WS 2 incorporation in S-rGO/WS 2 heterojunction have been confirmed by EDS, XPS and FTIR. The sensing performance of rGO-based chemiresistive-type sensor to ammonia at room temperature has been significantly improved by the sulfonation and incorporation of WS 2 nanoflakes. The chemiresistive sensor based on S-rGO/WS 2 exhibits enhanced response signals to 10∼50 ppm ammonia, while the response/recovery time is significantly shortened compared to rGO/WS 2 reported previously at room temperature. It benefits from both the extra introduced active acid centers sensitive to ammonia molecules and the better desorption-ability facilitated significantly by sulfonate groups (S O 3 H). The adsorption energy calculation of ammonia molecule on the sulfonated graphene sheet based on density functional theory (DFT) has been performed to illustrate the adsorption capacity of S O 3 H group. The selectivity and stability of gas sensor based on S-rGO/WS 2 have also been studied.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）