SENSORS
·
2024
·Vol. 24
·期 16
·5425
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IF 3.4
Shuo Xiao,Zheng Jiao,Xuechun Yang
Triethylamine (TEA) is a typical volatile organic compound (VOC) widely present in air and water, produced in industrial production activities, with high toxicity and great harm. Fluorescence detection and resistive sensing are effective methods for detecting pollutants. Here, In-doped interpenetrating twin ZIF-8 and its annealed derivatives have been successfully designed and prepared as a multifunctional TEA sensor. On the one hand, ZIF-8-In exhibits excellent fluorescence emission enhancement at 450 nm in a dose-dependent manner to TEA in water within the concentration range of 1–100 ppm, with a detection limit as low as 1 ppm. On the other hand, the annealed ZIF-8-In derivative is ZnO/In2O3with a porous hierarchical structure, which is a perfect sensitive material for manufacturing gas sensors. Within the concentration range of 1–100 ppm, the ZnO/In2O3gas sensor has a high response for 100 ppm TEA, reaching 107.7 (Ra/Rg), and can detect TEA gas as low as 1 ppm. Furthermore, the response of ZnO/In2O3sensors to TEA is at least 10 times that of the other four VOC gases, demonstrating excellent gas selectivity. This multifunctional sensor can adapt to complex detection situations, demonstrating good application prospects.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 35
·2000431
·
IF 16.836
Song-Ee Choi,Daehwan Park,Hyejin Hwang,Minjeong Seo,Duho Lee,Unyong Jeong,Jin Woong Kim
A platform is introduced for pressure-mediated chemiresistive glucose sensing based on a 2D array of glucose-conjugating silver nanowire (AgNW)-deposited conductive microparticles (AgCMPs). Glucose-conjugating AgCMPs, as transducers of the sensors, are fabricated by decorating the surface of monodisperse polyurethane elastomeric MPs with AgNWs by layer-by-layer deposition. Then, the AgNWs are covalently bonded to 4-mercaptophenylboronic acid (4-MPBA) to endow them with chemiresistive glucose sensing property against the applied pressure. The 4-MPBA-functionalized AgCMPs are positioned with high accuracy on a hole-patterned stencil film placed between electrodes. Using this sensor system, it is shown that the current induced by the application of constant pressure to the sensor film at a given supply voltage varies linearly with the glucose concentration before and after critical glucose bridging concentration. Notably, the AgCMP-based chemiresistive sensors could detect glucose over a wide concentration range from 0.56 × 10 −6 m to 56 × 10 −3 m with remarkable sensitivity and selectivity.
研究领域:
生物医学工程
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材料科学
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传感技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Tingjie Chen,Zhiyong Liu,Gang Zhao,Zipeng Qin,Peitao Zheng,John Tosin Aladejana,Zhendong Tang,Mingcen Weng,Xiangfang Peng,Jian Chang
Sustainable biomass materials are promising for low-cost wearable piezoresistive pressure sensors, but these devices are still produced with time-consuming manufacturing processes and normally display low sensitivity and poor mechanical stability at low-pressure regimes. Here, an aqueous MXene ink obtained by simply ball-milling is developed as a conductive modifier to fabricate the multiresponsive bidirectional bending actuator and compressible MXene-plant fiber sponge (MX-PFS) for durable and wearable pressure sensors. The MX-PFS is fabricated by physically foaming MXene ink and plant fibers. It possesses a lamellar porous structure composed of one-dimensional (1D) MXene-coated plant fibers and two-dimensional (2D) MXene nanosheets, which significantly improves the compression capacity and elasticity. Consequently, the encapsulated piezoresistive sensor (PRS) exhibits large compressible strain (60%), excellent mechanical durability (10 000 cycles), low detection limit (20 Pa), high sensitivity (435.06 kPa–1), and rapid response time (40 ms) for practical wearable applications.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Jianfeng Zhang,Chuang Yao,Xinhui Liu,Ziyi Ding,Yuan Liu,Baoxing Liu,Sunbin Deng,Hoi-Sing Kwok,Guijun Li
There is growing demand for convenient and cost-efficient ethanol sensing techniques in daily life and industry. However, the complexity, high cost, and large volume of the equipment hinder the widespread use of conventional ethanol sensing techniques. Here, we introduce a test paperlike visualized label-free ethanol sensing platform by taking advantage of the instability of 2D Ruddlesden–Popper perovskite in ethanol. The photoluminescence of PEA2Csn–1PbnBr3n+1 2D perovskite changes from deep blue to green distinctly when exposed to ethanol. A cheap demo ethanol test paper is fabricated by this 2D perovskite and paper using a simple method, demonstrating interesting rapid and convenient ethanol sensing performance. Crystal analysis, constituent analysis, spectral analysis, and molecular dynamic (MD) simulation reveal the crystal structure transformation from 2D to 3D induced by the migration of PEA+ cations in the original 2D perovskite when exposed to ethanol. In addition, a chemiresistive sensor based on the 2D perovskite and on the 2D–3D phase transformation is developed and demonstrates a high ethanol detection sensitivity with a limit down to 0.7 ppm. The photodetector fabricated by the 2D perovskite also demonstrates tunable sensitivity upon the controllable 2D–3D transformation. This remarkable colorimetric, chemiresistive, and photosensitive perovskite is expected to highlight its future application and be a supplement to the existing ethanol sensing and photodetector techniques.
研究领域:
材料科学
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传感器技术
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光学工程
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DOI
高影响因子
Bio-Design and Manufacturing
·
2024
·
IF 8.1
Wang Gaofeng,Meng Lingxian,Ji Xinyi,Liu Xuying,Liang Jiajie,Liu Shuiren
As the main component of wearable electronic equipment, flexible pressure sensors have attracted wide attention due to their excellent sensitivity and their promise with respect to applications in health monitoring, electronic skin, and human–computer interactions. However, it remains a significant challenge to achieve epidermal sensing over a wide sensing range, with short response/recovery time and featuring seamless conformability to the skin simultaneously. This is critical since the capture of minute electrophysiological signals is important for health care applications. In this paper, we report the preparation of a nacre-like MXene/sodium carboxymethyl cellulose (CMC) nanocomposite film with a “brick-and-mortar” interior structure using a vacuum-induced self-assembly strategy. The synergistic behavior of the MXene “brick” and flexible CMC “mortar” contributes to attenuating interlamellar self-stacking and creates numerous variable conductive pathways on the sensing film. This resulted in a high sensitivity over a broad pressure range (i.e., 0.03–22.37 kPa: 162.13 kPa −1 ; 22.37–135.71 kPa: 127.88 kPa −1 ; 135.71–286.49 kPa: 100.58 kPa −1 ). This sensor also has a low detection limit (0.85 Pa), short response/recovery time (8.58 ms/34.34 ms), and good stability (2000 cycles). Furthermore, we deployed pressure sensors to distinguish among tiny particles, various physiological signals of the human body, space arrays, robot motion monitoring, and other related applications to demonstrate their feasibility for a variety of health and motion monitoring use cases. Graphic abstract
研究领域:
材料科学
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生物医学工程
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电子皮肤技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2014
·
IF 3.84
Xiangrong Zhu,Haijuan Zhang,Jianmin Wu
A chemiresistive sensor array consisting of nine different types of ionogels was constructed. The conductivity of each ionogel was very sensitive to stimulations of volatile organic compounds (VOCs). The sensing mechanism of the ionogel was based on the change in ion mobility in response to the absorption of VOCs. This mechanism significantly differed from the currently used chemiresistive sensors, usually relying on the modulation of charge densities. The ionogel sensor can produce a reversible and fast resistance response upon exposure to dosing gases cycled between the VOC sample and N 2 . The resistance response of ionogel had a linear relationship with the VOC concentration. Meanwhile, the ionogel sensor displayed selectivity to different types of VOCs because of the specific molecular interaction between ionic liquids and the target organic vapor. A chemiresistive sensor array comprising nine types of ionogel with diverse chemical structures can generate a pattern of cross-reactive responses to a specific vapor, thereby leading to the discrimination of VOCs in air samples using principal component analysis.
研究领域:
材料科学
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化学传感
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环境监测
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Han Feng,Ping Liu,Xu Guo,Junliang Li,Yifan Sun,Shunge Wu,Ruohai Hu,Zhi Liu,Helei Tian,Yuanming Ma,Caixia Liu,Houzhu Huang,Fei Teng,Xinyue Tang,Austin Yang,Aiguo Song,Xiaoming Yang,Ying Huang
Flexible resistive sensors based on crack structures have been widely studied in the field of electronic skin and health monitoring. However, it is still a challenge to develop resistive sensors with strong interface bonding forces due to the problem that the sensitive layer of traditional cracked sensors falls off easily. This paper reports a new type of graphene-based resistive sensor, which uses modified poly(sodium 4-phenylene sulfonate) and graphene nanosheets to prepare a highly conductive, fragile, film sensitive layer. Siloxane at the end of modified poly(sodium 4-phenylene sulfonate) is used to enhance the interface between the sensitive layer and the silicone rubber layer to prepare a flexible resistive sensor with a crack structure. The sensor has a high sensitivity (gauge factor up to 21980.28) and a high response speed (∼65 ms), with an effective working range of 0–4.7 % strain. The sensor has been successfully applied to human physiological signal detection. The neural network algorithm successfully predicted the corresponding blood pressure based on the pulse wave signal detected by the sensor. The average error of systolic blood pressure and diastolic blood pressure was 0.79 and 0.42 mmHg, and the error of ± 5 mmHg accounted for 91.2 % and 94.3 % of the total, respectively. The error value passed the Association for the Advancement of Medical Instrumentation standard, and reached the Class A standard of British Hypertension Society.
研究领域:
材料科学
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生物医学工程
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电子皮肤技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2022
·
IF 9.618
Yingying Jian,Nan Zhang,Taoping Liu,Yujin Zhu,Di Wang,Hao Dong,Lihao Guo,Danyao Qu,Xue Jiang,Tao Du,Youbin Zheng,Miaomiao Yuan,Xuemei Fu,Jinmei Liu,Wei Dou,Fang Niu,Ruizhi Ning,Guangjian Zhang,Jinhai Fan,Hossam Haick,Weiwei Wu
Globally, bladder cancer (BLC) is one of the most common cancers and has a high recurrence and mortality rate. Current clinical diagnostic approaches are either invasive or inaccurate. Here, we report on a cost-efficient, artificially intelligent chemiresistive sensor array made of polyaniline (PANI) derivatives that can noninvasively diagnose BLC at an early stage and maintain postoperative surveillance through ″smelling″ clinical urine samples at room temperature. In clinical trials, 18 healthy controls and 76 BLC patients (60 and 16 at early and advanced stages, respectively) are assessed by the artificial olfactory system. With the assistance of a support vector machine (SVM), very high sensitivity and accuracy from healthy controls are achieved, exceeding those obtained by the current techniques in practice. In addition, the recurrences of both early and advanced stages are diagnosed well, with the effect of confounding factors on the performance of the artificial olfactory system found to have a negligible influence on the diagnostic performance. Overall, this study contributes a novel, noninvasive, easy-to-use, inexpensive, real-time, accurate method for urine disease diagnosis, which can be useful for personalized care/diagnosis and postoperative surveillance, resulting in saving more lives.
研究领域:
医学诊断
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生物医学工程
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人工智能
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癌症研究
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 41
·19077-19086
·
IF 3.3
Yue Wang,Xi Wang,Hui Zhang,Shasha Gao,Wenjie Xu,Yulong Zhao,Mingzhi Jiao,Sheng Huang,Xiuquan Gu
In this work, a facile room-temperature (RT) solution-processing strategy was developed to synthesize perovskite CsPbBr3 quantum dots (QDs), which were then modified with Zn-based organic ligands for enhancing their ambient environment and moisture stability. The as-prepared perovskite QDs were well dispersed in a trimethylbenzene solvent with a small particle size of ∼9 nm. Afterwards, a sensor was fabricated by spin-coating perovskite QDs on an interdigital electrode, leading to a sensitivity of 0.025 towards 400 ppm ethanol gas as well as a response/recovery time of 3.9 s/3.6 s at RT. This excellent sensing performance is attributed to the high carrier mobility and adjustable crystal structure of perovskite CsPbBr3 QDs. Theoretical calculation results verified that the sensitivity towards ethanol might result from the formation of chemical bonds between perovskite QDs and Zn-based ligands, leading to a change of molecular orbital energy levels. Furthermore, with a combination of machine-learning algorithms, accurate recognition of ethanol was realized in an ambient environment with high humidity. Our research might be helpful to construct an intelligent sensor for application under complex conditions, such as coal mines and chemical factories.
研究领域:
材料科学
·
化学传感器
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机器学习
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Wen-Hua Li,Nan Li,Haobing Zhang,Qiang Xu
Semiconductor nanofilm fabrication with advanced technology is of great importance for next-generation electronics/optoelectronics. Fabrication of high-quality and perfectly oriented semiconductor thin films and integration into high-performance electronic devices with low cost and high efficiency are huge challenges. Here we exquisitely utilized the Marangoni effect to perfectly guide tin disulfide (SnS2) nanocoins into an ordered assembly in milliseconds, resulting in an uniaxial-oriented monolayer semiconductor film. Further exploration revealed that the formed “crumple zone” at the interface caused by the Marangoni force endows the nanofilm with a rapid healable capability, which can be easily transferred to arbitrary substrates. As a proof of concept, the nanocoin-monolayer was transferred onto a micro-interdigitated electrode substrate to form a high-performance chemiresistive sensor that can effectively monitor the trace amounts of toxic gases. In addition, the assembled monolayer nanofilms can be conformally printed on freeform surfaces: both flat and nonflat substrates. This efficient and low-cost Marangoni force-assisted surface self-assembly (MFA-SSA) strategy is promising for advanced microelectronics and real industrial applications.
研究领域:
材料科学
·
纳米技术
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电子学
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Additive Manufacturing
·
2023
·
IF 11
Zhengqiang Guo,Hongrui Zhang,Weigui Xie,Aimin Tang,Wangyu Liu
Due to the constraints of photoinitiators and mechanical properties, vat photopolymerization 3D printable hydrogels are still the focus of current research. Drawing inspiration from the water-soluble modification of the photoinitiator diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO), a rapid and expedient UV-curable hydrogel with remarkable strength and toughness has been developed using polymerizable micelles . The incorporation of polymerizable micelles not only significantly enhances the solubility of TPO, an efficient commercial photoinitiator, thereby eliminating the need for specific organic solvents , but also serves as physical crosslinking points for polymer chains. Moreover, by harnessing the abundant hydrogen bonding present in glycerol and plant cellulose, the precursor hydrogel exhibits a rapid layer-by-layer printing capability of 6 s per layer, accompanied by an enhanced mechanical toughness reaching 4.55 MJ/m³. The hydrogel-based resistance sensor demonstrates wide-ranging detection capabilities and high sensitivity. It has the gauge factor (GF) of 2.28 within low strains (<100 %) and can maintain a high linear GF of 5.84 even under large strains (200–500 %). This allows the hydrogel-based sensor to have a significant change in relative resistance when detecting human limb movements. The lattice structure design imparts a notable pressure sensitivity of 1.13 KPa −1 . Additionally, the utilization of a glycerol/water binary solvent ensures excellent water retention properties. Furthermore, the hydrogel exhibits significant advantages in capacitive sensors owing to its printed surface gradient bulge structure. Consequently, the hydrogel developed in this study possesses exceptional printing abilities, high strength, and impressive toughness, making it a valuable option for the design and fabrication of flexible electronic devices.
研究领域:
材料科学
·
3D打印
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传感器
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机械工程
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高分子科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 19
·3549-3556
·
IF 3.545
Yuan Lin,Huijie Jiang,Guangling Liang,Wei-Hua Deng,Qiaohong Li,Wen-Hua Li,Gang Xu
A new conductive coordination polymer (CCP), Ag(SPh–NO2)·AgNO3, with a three-dimensional (3D) non-porous structure composed of a unique 2D inorganic layered structure linked by an organic linker, was reported. The 3D CCP Ag(SPh–NO2)·AgNO3 exhibits semiconductor behavior, with electronic conductivity as high as 2.7 × 10−6 S cm−1 at 295 K, which is comparable to the vast majority of highly conductive 3D coordination polymers. The chemiresistive humidity sensing ability of Ag(SPh–NO2)·AgNO3 was studied over a wide relative humidity (RH) range (10–90% RH) at room temperature. The sensor showed exceptionally high moisture responsiveness, with a 106-fold increase in response at 90% RH and excellent sensitivity to humidity in the range of 10–80% RH. The sensing mechanism was further studied using alternating current (AC) impedance spectroscopy and direct current (DC) instantaneous reverse polarity experiments. The exceptionally high response of the Ag(SPh–NO2)·AgNO3-based sensor at high RH is attributed to the periodic arrangement of the ion species via reversible coordination bonds in the structure. H3O+ and Ag+ are easily formed on its hydrophilic surface, through which the free transport of ionic carriers dominates the conductivity change. Using density functional theory (DFT) calculations, it is further demonstrated that the reversibly coordinated AgNO3 in the structure can be easily occupied by water molecules, which is thermodynamically spontaneous in the presence of humidity. Furthermore, the functional AgNO3 groups and their reversible coordination bonds enabled Ag(SPh–NO2)·AgNO3 to show exceptionally high moisture responsiveness.
研究领域:
材料科学
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化学
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传感器
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电化学
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计算化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）