JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Xue-Xia Chen,Xu-Hua Xiao,Zhi-Feng Shi,Rui Du,Xin-Jian Li
Using silicon nanoporous pillar array (Si-NPA) as substrate, a kind of GaN/Si nanoheterostructure (GaN/Si-NPA) is prepared by depositing GaN nanocrystallites on Si-NPA with chemical vapor deposition method. The morphology characteristics and optical properties of GaN/Si-NPA are investigated systematically. Based on GaN/Si-NPA, a self-powered ultraviolet (UV) photodetector (PD) with device structure of ITO/GaN/Si-NPA/ sc -Si/Ag is constructed by depositing ITO on GaN layer and silver on single crystal silicon , respectively. At zero bias voltage without an external power supply, GaN/Si-NPA exhibits a responsivity of 0.072 mA/W, a high current on/off ratio of ∼10 4 (16 μW/cm 2 ) and fast response speeds of 39.98/40.10 ms under an UV light irradiation at 305 nm. The high performance of GaN/Si-NPA is attributed to the built-in electric field in the heterojunction , which is interpreted via building the energy-band diagrams. The results illustrate that GaN/Si-NPA might be a suitable material system for self-powered UV PDs.
研究领域:
材料科学
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光子学
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半导体物理
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Guangzhi Yang,Chenkai Cao,Haoran Zhong,Yu Cheng,Wenhui Zhang,Ding Wang
As a typical pollution gas , xylene poses a particularly serious threat to human health. The xylene sensors with low operating temperature, fast response speed, sufficient detection limit and satisfactory selectivity are required for safety protection. Herein, a novel xylene sensitive material (SnO 2 @MoS 2 ) was constructed by self-assembling MoS 2 nanosheets array on SnO 2 nanofibers . The response of SnO 2 @MoS 2 sensor was 23.5–100 ppm xylene vapor, which was much higher than that of single-component sensors. Additionally, the response/recovery times were 21.5/60.4 s with a limit of detection (LOD) as low as 0.5 ppm. The good sensitive was ascribed to the unique resistance characteristics of the hierarchical structure, the regulation of electronic property by heterojunctions , and the increase of adsorption sites caused by large specific surface areas and surface defects . This work enlightens a novel strategy on the construction of MoS 2 based core-shell hierarchical nanomaterials and future development of high efficiency xylene sensor.
研究领域:
材料科学
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纳米技术
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环境科学
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传感器技术
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DOI
高影响因子
DYES AND PIGMENTS
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2025
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IF 4.2
Guoqiang Kuang,Yabing Wang,Mengxiong Zhu,Hongbin Yin,Yijie Tao,Yafei Guo,Shiguo Zhang
The synthesis of high-performance electrochromic polymers remains a key research highlight in the field of electrochromism. Herein, a series of donor-acceptor type conjugated polymers are synthesized based on 4,9-Dihydro-s-indaceno[1,2-b:5,6-b]dithiophene (IDT), 3,4-ethylenedioxythiophene (EDOT), benzo[c][1,2,5]thiadiazole (BTD) and benzothiadiazo-[3,4-g]-quinoxaline (TQX) units by Stille coupling polymerization. By fine-tuning the ratios between the monomers, the synthesized copolymers exhibited diverse color options and tunable properties, by applying an extra potential, polymer films transit from yellow, pink, green, and dark brown to highly transmissive state, along with outstanding electrochromic properties in both the NIR region and the visible region, such as high optical contrast, rapid switching response, and excellent stability. As a result, the derived electrochromic devices demonstrate an optical contrast exceeding 40 % and retained over 74 % of their optical contrast after 1000 switching cycles. These findings collectively demonstrate that these copolymers hold significant potential for applications in smart windows and adaptive camouflage as a versatile color palette.
研究领域:
材料科学
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高分子化学
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电致变色
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有机电子学
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智能材料
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Xiaoyan Lang,Zhu Zhang,Xiaxia Xing,Xinhua Zhao,Zhenxu Li,Xiaoyu Chen,Yi Zhang,Dachi Yang
Hydrogen sulfide (H 2 S) sensing with ppb concentration detection limit and high selectivity is highly desired in future exhaled diagnoses of halitosis, asthma and down syndrome, however, needs further developing. Here, a ppb-concentration and highly selective H 2 S sensing has been developed with the two-dimensional cobalt and iron oxide nanosheets (CoFe x O y NSTs), which is transformed from leaf-shaped zeolitic imidazolate frameworks {ZIF-L(Co)} by combined Fe 2+ ion-etching and annealing. Typically, as-prepared CoFe x O y NSTs are of ∼ 10 nm thick with rough surface. Beneficially, the CoFe x O y NSTs present outstanding selectivity to H 2 S against other interfering gases and exhibit a detection limit as low as 50 ppb. Remarkably, the sensor prototypes exhibit a high response to 10 ppm H 2 S (R a /R g = 23.8) and shows fast response speed (∼13 s to 10 ppm H 2 S). Theoretically, such excellent H 2 S sensing might be attributed to the high surface ratio of CoFe x O y NSTs providing enriched adsorption sites for H 2 S molecules. Practically, an H 2 S sensing device built with the CoFe x O y NSTs sensor prototype is simulated for detecting H 2 S with reliable response, which is potential in future intelligent healthcare.
研究领域:
材料科学
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纳米技术
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传感器
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医疗技术
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产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
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IF 6.9
Menghan Tian,Xueqing Liu,Xungang Diao,Xiaolan Zhong
The conductive polymer polyaniline (PANI) has attracted much attention in the field of electrochromic energy storage device (EESD) due to its rich color changes and good pseudocapacitive properties, however, the operating voltage window and cycling stability of PANI material, as an essential part in the full electrochromic devices , has failed to be fully explored and employed. Herein, we synthesized the PANI and MnO 2 nanocomposite structure via robust one-step electrodeposition approach, forming an intriguing architecture similar to the coral-like nano-porous. The rougher coral-like structure provides a great quantity nano porous ion transport channel, which greatly improves the working voltage range and cycling stability of the electrode, and shows great potential as an anode electrode for EESDs. In addition, we built a complementary full EESD prepared with tungsten oxide (WO 3 ) as the counter electrode, which has both electrochromic and energy storage dual function integration, allowing real-time observation of the EESD operating state based on color change. It can work stably under a large voltage window of -2V–1.5V, with good bistable performance, fast response speed and more than 1000 times electrochemical cycle life. This work provides a new opportunity to design next-generation high-performance and intelligent hybrid energy storage system for consumer electronics.
研究领域:
材料科学
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电化学
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纳米技术
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能量存储
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电致变色器件
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2023
·
IF 7.4
Wenlin Ma,Lihua Pang,Jinhua Liu,Lei Wen,Huili Ma,Yinhui Li,Zhihui Xu,Chengwu Zhang,Hai-Dong Yu
Real-time chemical and biological sensing in vitro is important for application in health and environmental monitoring. Thus, a more rapid and stable detection method is urgently needed. Herein, an immediate-stable real-time fluorescent immunosensor with a high response speed (∼100%, <1 s) and approximately zero steady-state error is constructed. The developed sensor is based on the MnO4–-triggered in situ immediate-stable fluorogenic reaction between dopamine and orcinol monohydrate to produce azamonardine (DMTM). The obtained DMTM is identified and characterized by high-resolution mass spectrometry, 1H NMR spectroscopy, 13C NMR spectroscopy, and theoretical calculations. The present sensor achieves a highly sensitive detection of dopamine (DA) with a limit of detection (LOD) of 10 nM as well as alkaline phosphates (ALP) with an LOD of 0.1 mU/mL by using orcinol monohydrate phosphate sodium salt as a substrate. As a proof of concept, ALP-triggered fluorescence ELISA using cardiac troponin I (cTnI) as a model antigen target is further constructed. The developed real-time sensor achieves the detection of cTnI with an LOD of 0.05 ng/mL. Moreover, the sensor proposed by us is successfully applied to assess the cTnI level in clinical serum specimens and yields results consistent with those obtained by the commercial ELISA method. The immediate-stable real-time fluorescence immunosensor provides a promising and powerful platform for the trace detection of biomolecules in clinical diagnosis.
研究领域:
分析化学
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生物化学
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医学诊断
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环境监测
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临床化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Yu Liu,Yudong Sun,Yong Qi,Wenbin Niu,Wei Ma,Suli Wu,Bingtao Tang,Shufen Zhang
The stimuli-responsive textiles, especially water-responsive textiles, have garnered attention owing to their environmental compatibility. Inspired by the hydrochromic behavior of Diphylleia grayi, water-rewritable structural color (WRSC) textiles exhibiting fast response speed and antispreading capability were fabricated by spraying hollow SiO2 (H-SiO2) microspheres and poly(trifluoroethyl methacrylate-butyl acrylate) [P(TFEMA-BA)]. The water-written textiles exhibited structural color changes in 0.6 s via an increase in the refractive index, driven by water penetrating the gaps between H-SiO2 microspheres. The structural color was restored to the initial state after the water evaporated, allowing multiple cycles of the write-erase-write mode. The hydrophobic P(TFEMA-BA) adhesive was used to construct a stable chromogenic array and endow WRSC textiles with antispreading properties, thereby improving structural stability and achieving clear writing patterns. The prepared WRSC textiles demonstrated high flexibility, structural stability, and water-rewritable properties, providing advanced bionic inspiration and valuable design ideas for rewritable materials and smart textiles.
研究领域:
材料科学
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纺织工程
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仿生学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
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IF 8.4
Qiuni Zhao,Yadong Jiang,Liu Yuan,Zhen Yuan,Boyu Zhang,Bohao Liu,Mingxiang Zhang,Qi Huang,Zaihua Duan,Huiling Tai
Combining advanced energy-generation technologies with sensors to develop self-powered sensing shows great potential in intelligent electronics, but sluggish response kinetics and low output are the main obstacles. Herein, we design a hyaluronic acid (HA)-induced crumpling of Nb 2 CT x nanosheet to construct hydrogen bond conduction network, and develop it for fast humidity sensing based on primary battery . The in-situ formation of organic/inorganic hybrid interphase with crumpling structure by electrostatic flocculation is capable to provide abundant adsorption sites and accelerate proton (H + ) transport. Benefited from these, the Nb 2 CT x /HA primary battery-based humidity sensor (PBHS) not only exhibits an outstanding response and recovery speed (15.1 s and 3.4 s at 72.0 % relative humidity (RH)), high response (0.7 V), low hysteresis (3.6 % RH), but also can be also used as a nanogenerator with a power of 0.96 μW and sustainable voltage output for 12 h. Furthermore, the multifunctional applications are demonstrated in medical assisted monitoring, health care, intelligent sensing, and green-energy generation. This work offers a new insight into PBHS design and the development of high-performance power-generation humidity sensor.
研究领域:
材料科学
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纳米技术
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能源技术
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传感器与执行器
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生物医学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2023
·Vol. 11
·期 17
·5667-5679
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IF 6.4
Shulan Jiang,Zeliang Hou,Xin Zheng,Qian Wu,Xiaoqi Yang,Wuqiong Cai,Ying Yi,Siyi Cheng,Guojun Wen,Xingyue Liu
The emerging wide-bandgap and chemically stable CsPbCl3 perovskites are of significant interest by virtue of their broad application prospects in high-precision ultraviolet (UV) detection. Although many fabrication techniques have been developed to improve the quality of CsPbCl3 polycrystalline films for their use in self-powered UV photodetectors, the high intrinsic trap density in the surface and grain boundaries of the films restricts the improvement of the device performance. Herein, organic choline chloride (ChCl) is introduced to passivate the surface and grain boundary defects of the evaporated CsPbCl3 films. Systematic experimental characterization and theoretical calculations validate that the bond formation between the ChCl and uncoordinated positively charged Pb2+ cations helps to alleviate the Cl− vacancy defects and Pb–Cl antisite substitution defects as well as enhance the structural stability of CsPbCl3 perovskites. The ChCl modification can also tailor the band alignment and expand the built-in potential of the device, conducive to the charge extraction and suppression of the non-radiative recombination loss. Thus, the ChCl-modified photodetectors exhibit a pronouncedly augmented UV detection performance compared to their non-modified counterparts. The best-performing photodetector achieves a fast UV response speed of 1.85 μs, a high on/off ratio of up to 3.91 × 105 and an excellent specific detectivity of 8.64 × 1012 Jones in a self-driven mode. In addition, the ChCl-modified device presents superior comprehensive stability when exposed to consecutive UV light soaking, humidity and heat, conspicuously promoting the practical applications of CsPbCl3-based UV detectors.
研究领域:
材料科学
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光电子学
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光子学
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半导体物理
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2024
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IF 5.7
Yuwen Gai,Luyu Yang,Wei Shen,Fengyan Tan,Qingqing Yu,Lei Zhang,Dongping Sun
A flexible strain sensor for detecting human motion signals has been a research hotspot. However, it is still challenging to achieve a good balance between sensitivity, strain tolerance, and toughness. In this study, we present a piezoresistive strain sensor composed of ductile bacterial cellulose (BC) and highly conductive MXene (Ti3C2Tx) nanosheets by applying simple gel-casting. The hydrogel exhibits excellent mechanical properties owing to the physical crosslinking by hydrogen bonds between the rich hydroxyl groups of BC and the oxygen-containing functional groups on MXene, achieving a breaking strength of 2.52 MPa and a strain of 87%. MXene also exhibits excellent electrical conductivity and sensitivity for detecting strain-induced deformation. The hydrogel can cycle more than 200 times under tensile or compressive strain and has a superior strain detection limit of 0.05% and a response speed of 130 ms. Our sensor shows real-time stress sensing under different amplitudes of human motions, such as fingers, wrists, and elbows, and still maintains its sensing ability underwater. Overall, the hydrogel sensor does not require special instrumentation, modification, or crosslinking agents in preparation; provides high tensile strength and good biocompatibility; and retains response ability underwater. Therefore, the flexible conductive hydrogel has a good application potential in the field of wearable strain–stress sensors.
研究领域:
材料科学
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纳米技术
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生物医学工程
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可穿戴技术
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传感器
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Tao Wang,Daming Zheng,Karol Vegso,Nada Mrkyvkova,Peter Siffalovic,Xiaocong Yuan,Michael G. Somekh,Laurent Coolen,Thierry Pauporte,Feng Fu
Metal halide perovskites are attracting increasing attention as photodetectors (PDs) materials due to their excellent photoelectric properties. However, integrating perovskite to realize high-resolution perovskite pixel arrays remains critical to enable practical devices. Herein, we demonstrate a high-responsivity and stable 10 × 10 flexible PDs array based on formamidinium-based quasi-2D Ruddlesden-Popper (BA) 2 FAPb 2 I 7 (n = 2) (BA= butylammonium, C 4 H 9 NH 3 + ) perovskite elements for image sensing. The high-performance (BA) 2 FAPb 2 I 7 arrays are synthesized on a polyethylene terephthalate (PET) flexible substrate , on a large scale, high quality, and controllable manner by introducing Au nanoparticles to enhance film quality upon the annealing process and recrystallization by applying formamidinium chloride (FACl) post-treatment to reduce perovskite film defects, combined with an innovative SiO 2 -assisted hydrophilic and hydrophobic surface treatment strategy. The prepared flexible PDs arrays show excellent optoelectronic properties with high responsivity (5.9 A W −1 ), a detectivity of 8.2 × 10 12 Jones, large on/off current ratio (up to 3 × 10 4 ), ultimate response speed (12.8 μs/10.1 μs), and wide spectral response range. In addition, the device shows outstanding mechanical stability under severe bending (θ = 120°) and excellent folding durability after thousands of bending cycles. It also exhibits excellent environmental stability with only a slight degradation of photoresponse after 100 days of storage under the ambient environment. Finally, the integrated flexible PDs arrays can be used as an effective visible light image sensor with good spatial resolution, paving a multifunctional and competitive way for future wearable sensors and artificial vision systems. One-sentence summary Low-dimensional halide perovskite layers pixelized on a polyethylene terephthalate (PET) flexible substrate provide high performance photodetectors.
研究领域:
材料科学
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光电子学
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纳米技术
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成像技术
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可穿戴设备
✓ 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）