CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Guangyou Liu,Jie Liu,Qitian Fan,Yunhe Liu,Zheng Zeng,Zhuohang Li,Xinzao Wu,Mingyang Yang,Bo-Ru Yang
Smart windows can dynamically control the optical transmittance of natural light and efficiently reduce the energy consumption of buildings. Currently, the practical application of smart windows is limited by high power consumption, low transmittance, and complicated preparation process. Developing smart windows with fast response and high transmittance is challenging. Herein, we fabricated a smart window based on electrophoretic display (EPD) technology, which can switch between white and transparent states by changing the stacking states of the electrophoretic particles on electrodes. To further increase the transmittance of the smart window, the polyvinyl alcohol (PVA) hydrophilic layer was spin-coated on the electrode to reduce the adhesion of particles. Compared with other EPD smart window technologies, our device exhibits the fastest response time of up to 375 ms at 30 V, high transmittance of up to 78% at 632 nm, and a high contrast ratio of up to 89. In addition, to reduce the particle’s lateral diffusion and improve our device's stability, the microcup array was aligned on the interdigital electrode. The particles can be driven and stacked onto the side walls of the microcup to achieve a transparent state. This work demonstrated that the EPD device would provide a promising future for practical smart windows with high transmittance and fast response time.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Guangyou Liu,Xinzao Wu,Feng Xiong,Jinglan Yang,Tao Zhou,Qitian Fan,Jie Liu,Zhuohang Li,Zheng Zeng,Yunhe Liu,Bo-Ru Yang
As the Internet of Things (IoT) significantly improves people's lifestyles, flexible and low-power displays will become essential to real-time human-computer interaction. Electrophoretic display (EPD) has many advantages, such as low power consumption , flexibility, and high sunlight visibility, which is necessary for IoT terminal display. However, preparing electrophoretic particles with high charge and spatial resistance is difficult. Herein, dual-silane coupling agents, (3-Aminopropyl) trimethoxysilane (APS) and vinyltrimethoxysilane (VTS), were co-grafted on the black particles to optimize the electrophoretic particles' dispersity and charge. To evaluate the charge content and dispersity of particles, we measured the particles with zeta potential , dynamic light scattering, and long-term standing treatment. Fe 3 O 4 -APS 0.5 VTS 0.5 -PLMA, selected as the black particles for EPD, had an average particle size and zeta potential of 300 nm and 25 mV, respectively. Besides, the concentration of the black and white particle would significantly affect the EPD's performance. When optimizing the white and black particle concentration to 4:1, the contrast ratio of EPD was up to 13.2. In addition, the EPD has a response time of 200 ms and exhibits an invertible black and white state under ±15 V. Finally, to improve the stability of electrophoretic particles, the particles were encapsulated in microcups and driven to the black and white state under 30 V. This work demonstrated that dual-silane coupling agent particles have the potential to achieve the fast response and high contrast ratio EPD.
研究领域:
材料科学
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显示技术
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Wenjing Zhai,Wenhao Zheng,Zhihang Zhang,Lin Huang,Bing Yu,Liufang Chen,Guangyuan Li,Xinyu Li,Xiaohui Zhou,Lin Lin,Zhibo Yan,Chao Chen,Xiangping Jiang,Jun-Ming Liu
The ternary metal chalcogenide AgSbS2 has been regarded as a promising photovoltaic compound due to its excellent stability and nontoxicity. However, the response time of the as-prepared AgSbS2 photodetectors is longer by several orders of magnitude than the time required for practical application, appealing to an improving strategy by alloy engineering. Herein, we fabricated AgSb1–xBixS2 (x = 0–0.5) photodetectors and investigated their photoresponse behaviors. In comparison with the AgSbS2 photodetector, the as-prepared AgSb0.7Bi0.3S2 photodetector demonstrates a remarkable reduction in response time by more than 3 orders of magnitude. It is found that the trap level of AgSb0.7Bi0.3S2 is ∼0.2 eV shallower than that of AgSbS2, which contributes to the dramatic decrease in response time. This work demonstrates that alloy engineering provides an effective solution to considerably shorten photodetector response time and essentially facilitates device optimization.
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
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2014
·Vol. 14
·期 6
·4303-4307
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IF 1.339
Zhang Yupeng,Wu Jian,Zhang Ying,Guo Wenbin,Ruan Shenping
Na2Ti3O7 nanotubes was synthesized by a hydrothermal method, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Then the material was coated on Al2O3 ceramic
substrate to fabricate humidity sensors using Ag–Pd as interdigitated electrodes. The sensor shows high humidity sensitivity and quick response-recovery time. The impedance changes about five orders of magnitude within humidity range from 11% to 95% relative humidity (RH). At the frequency
of 100 Hz, the response time is 2 s and recovery time is 4 s, and the maximum hysteresis is less than 3% RH. Moreover, complex impedance property at different RH was investigated to study sensing mechanism. The results indicate the potential applications of Na2Ti3O7
nanotubes for fabricating high-performance humidity sensors.
研究领域:
材料科学
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传感器技术
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 26
·1-12
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IF 2.8
Zhao Zhihua,Jin Ziying,Pan Yafang,Jin Guixin,Shen Xiaoqing,Wu Lan
In this paper, the humidity sensitive material ZIF-67 with rhombic dodecahedron structure was prepared by the co-precipitation method. The crystal structure, elemental composition, and morphology were comprehensively characterized utilizing diverse analytical techniques. The humidity sensing properties were investigated at room temperature (25 °C). The ZIF-67 humidity sensor exhibited preferable humidity sensing performance with a wide linear detection range (11% − 95% relative humidity (RH)), rapid response/recovery time (34 s/211 s), high response (120.05), good stability, and high resolution with a minimum detection limit of 1% relative humidity. The sensor also exhibited good repeatability and stability, demonstrating its potential applications in environmental monitoring, medical practice, aerospace technology, and other domains that require high-precision measurement. In addition, this study proposes a promising candidate material for humidity sensing, exhibiting vital potential in a specific area or application and having the potential to develop cutting-edge humidity sensors.
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
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产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 9
·2105239
·
IF 17.521
Jinyang Cai,Wei Luo,Juanjuan Pan,Gang Li,Yuyang Pu,Luying Si,Gongpu Shi,Yuxuan Shao,Huiru Ma,Jianguo Guan
Glucose-sensing photonic crystals are promising for the significant advance of continuous glucose monitoring systems due to the naked-eye colorimetric readouts and noninvasive detection of diabetes, but the long response time hampers their practical applications. Here, for the first time probes of photonic nanochains (PNCs) are demonstrated that are capable of continuously and reversibly sensing glucose concentration ([glucose]) variation within seconds by color change without power consumption, much faster by 2–3 orders of magnitude than previous ones. They are comprised of 1D equidistant arrays of magnetic nanoparticles enveloped by tens-of-nanometer-thick phenylboronic acid-functionalized hydrogels, and fabricated by developing selective concentration polymerization of monomers in binary microheterogeneous solvents of dimethyl sulfoxide (DMSO) and H 2 O. In this process, both 3-acrylamido phenylboronic acid (AAPBA) and N -2-hydroxyethyl acrylamide (HEAAm) are preferentially dissolved in the small volume of free DMSO concentrated in the vicinity of poly vinylpyrrolidone coated Fe 3 O 4 colloidal nanoparticles (Fe 3 O 4 @PVP), yielding Fe 3 O 4 @PVP@poly(AAPBA- co -HEAAm) PNCs after UV irradiation under magnetic field. The PNCs in phosphate buffered solution have a wavelength-shift range up to 130 nm when [glucose] changes from 0 to 20 × 10 −3 m . The results can facilitate real-time glucose monitoring and provide an alternative to produce functional organic–inorganic nanostructures.
研究领域:
生物医学工程
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材料科学
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糖尿病研究
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yucheng Wang,Azhar Ali Haidry,Adil Raza,Zhe Wang,Fazal Ghani,Yanling Weng,Nouf H. Alotaibi,Saikh Mohammad
Platinum modified ordered mesopore TiO 2 (OMT:X Pt) with tunable channel was synthesized via soft-templet method known as Evaporation Induced Self-Assembly (EISA). Both porosity and metal doping have a significant impact on how metal oxide semiconductors respond to humidity. Thus, based on earlier studies, Pt-doped ordered mesoporous TiO 2 was synthesized and described under optimal conditions. From nitrogen adsorption and desorption analysis, while it was found that the specific surface area decreased (from 240 to 125 m 2 /g), pore size increased (from 4 to13 nm). The humidity sensing performance of the Pt-modified OMT is investigated by dynamic sensing system. The sensor based on 5 wt% Pt-doped OMT showed high response (SR ∼ 10 5 ), fast response time (26 s) to 95 % relative humidity (RH) and good long-term stability (over 90 days). To understand and authenticate the sensing mechanism, the structure and morphology of synthesized Pt-doped OMT was performed by BET, SEM, HRTEM, XRD and XPS. Furthermore, a plausible sensing mechanism is discussed on basis of the obtained results.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Advanced Optical Materials
·
2014
·Vol. 2
·期 8
·771-778
·
IF 0
Hui Liu,Zhiming Zhang,Linfeng Hu,Nan Gao,Liwen Sang,Meiyong Liao,Renzhi Ma,Fangfang Xu,Xiaosheng Fang
A new UV-A photodetector based on K 2 Nb 8 O 21 nanowire is successfully fabricated for the first time. The potassium niobate is synthesized using a facile molten method. The K 2 Nb 8 O 21 nanowire photodetectors exhibit an excellent sensitivity and wavelength selectivity with respect to UV-A light. Furthermore, the photodetectors show great advantages in response time compared with other sensors based on single-oxide semiconductor nanostructures, and, especially, the responsivity is much better than that of single ZnS nanobelt photodetectors. The mechanism of conductivity is explained from the viewpoints of field emission and thermionic field emission for the change of light intensities.
研究领域:
材料科学
·
光电技术
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DOI
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2015
·
IF 1.909
Xuesong Wang,Jinbao Zhang,Lianyuan Wang,Shouchun Li,Li Liu,Chang Su,Lili Liu
Pure and Er-doped In 2 O 3 nanotubes were systematically fabricated by using a single nozzle eletrospinning method followed by calcination . The as-synthesized nanotubes were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectrometry and X-ray powder diffraction (XRD). Compared with pure In 2 O 3 nanotubes, Er-doped In 2 O 3 nanotubes exhibit improved formaldehyde sensing properties at 260 °C. The response of Er-doped In 2 O 3 nanotubes to 20 ppm formaldehyde is about 12, which is 4 times larger than that of pure In 2 O 3 nanotubes. The response and recovery times of Er-doped In 2 O 3 nanotubes to 20 ppm formaldehyde are about 5 and 38 s, respectively. Furthermore, the response of Er-doped In 2 O 3 nanotubes to 100 ppb formaldehyde is 2.19.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Chang Su,Changbai Liu,Li Liu,Mucui Ni,Haiying Li,Xiaoqing Bo,Lili Liu,Xiao Chi
Pure and 3 wt% Sm-doped α-Fe 2 O 3 nanotubes are prepared via a typical electrospinning technology and calcination procedure. The characteristic and morphology of the synthesized nanotubes are investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). Compared with pure α-Fe 2 O 3 nanotubes, 3 wt% Sm-doped α-Fe 2 O 3 nanotubes display enhanced gas-sensing properties. The response of 3 wt% Sm-doped α-Fe 2 O 3 nanotubes is 33–50 ppm acetone, which is 13 times larger than that of pure α-Fe 2 O 3 nanotubes. The lowest detection limit of acetone is 500 ppb to which the response is 2.3 at the optimum operating temperature of 240 °C. The response and recovery times are about 6 and 11 s to 50 ppm acetone, respectively. In addition, 3 wt% Sm-doped α-Fe 2 O 3 nanotubes exhibit good selectivity and long term stability.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 16
·8696-8703
·
IF 7.76
Fangxu Ji,Xianpei Ren,Xiaoyao Zheng,Yucheng Liu,Liuqing Pang,Jiaxing Jiang,Shengzhong (Frank) Liu
By taking advantages of both grinding and sonication, an effective exfoliation process is developed to prepare two-dimensional (2D) molybdenum oxide (MoO3) nanosheets. The approach avoids high-boiling-point solvents that would leave a residue and cause aggregation. Gas sensors fabricated using the 2D-MoO3 nanosheets provide a significantly enhanced chemical sensor performance. Compared with the sensors using bulk MoO3, the response of the 2D-MoO3 sensor increases from 7 to 33; the sensor response time is reduced from 27 to 21 seconds, and the recovery time is shortened from 26 to 10 seconds. We attribute the superior performance to the 2D-structure with a much increased surface area and reactive sites.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
·
IF 7.1
Xu Ni,Jing Luo,Ren Liu,Xiaoya Liu
In this work, a one-step approach through UV-curing technology was developed to fabricate polyelectrolyte-based humidity-sensing coatings. The humidity-sensing coatings were prepared by the photo-polymerization of three monomers via UV irradiation: quaternary ammonium salt of 2-(dimethylamino)ethyl methacrylate (DEB) served as humidity-sensing monomer, methyl methacrylate (MMA) tailored the hydrophilicity/hydrophobicity of the coating, and 1,6-hexanediol diacrylate (HDDA) enhanced the stability and repeatability via crosslinking. The influence of the introduction of MMA and HDDA in the coating on the humidity-sensing performance was studied. The introduction of hydrophobic monomer and crosslinking agent could not only enhance the response and decrease the hysteresis of the sensing coating, but also improve the stability and repeatability of the coating at high relative humidity. Under optimized conditions, the prepared humidity-sensing coating showed a wide detection range (22 %–91 %RH), small hysteresis (2 %RH), and short response time (5 s) and recovery time (76 s). The bending test of the humidity-sensing coating showed that the sensing coating has good flexibility. The whole process is rather simple (one step), highly efficient (accomplished in several minutes), scalable, and environmental-friendly, which provides a promising strategy in fabricating flexible humidity-sensing devices.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）