LANGMUIR
·
2013
·
IF 4.187
Chenyu Ye,Jiaxi Xu,Shuxue Zhou,Min Chen,Limin Wu
This paper presents a facile method to synthesize monodisperse SrTiO3 hollow spheres with one or two openings through a template-assisted approach. These hollow spheres were further self-assembled into densely packed nanofilms at a “hexane–water” interface. TEM, SEM, HRTEM, XRD, etc., were employed to characterize the morphology and structure of the SrTiO3 hollow spheres as well as the corresponding nanofilms. The nanofilm-based photodevice displayed considerably higher sensitivity to UV than visible light and dark.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 11
·3168-3177
·
IF 6.1
Qi Zhang,Ruibing Lv,Ying Wang,Zhenghang Luo,Pengyang Pan,Tingwei Wang,Quancheng Liu
Laser-sensitive primary explosives (LSPEs) have long been a focus of attention as the material foundation for safer and more efficient laser-initiation technology. However, LSPEs often have poor safety due to their structural characteristics, which greatly limits the development and application of laser initiating technology. In this work, we introduced the concept of multidentate chelates into LSPEs and innovatively propose the concept of energetic quadridentate chelates. To achieve this highly creative idea, we synthesized an energetic flexible chelating ligand, namely, 1,2-bis(3-nitroamino-1,2,4-triazol-5-yl)ethane (BNATE), and prepared a novel metal quadridentate chelate, namely, [Cu(BNATE)·2H2O] (1), by chelating it with Cu2+. Through a series of tests, including X-ray single-crystal diffraction analysis, thermogravimetric analysis, and differential scanning calorimetry (TG-DSC), and evaluation of the safety and detonation performance, it was proven that this compound adhered to the high stability characteristics of the chelate, and its safety and detonation performance were superior to previous LSPEs. Moreover, through laser-initiation experiments, it was determined that the compound had excellent photosensitivity and a lower laser-initiation threshold. To explain the reason why the chelate structure is specifically sensitive to a laser, diffuse reflection ultraviolet and TD-DFT simulations were conducted, which not only demonstrated experimentally that chelation had a good enhancement effect on the laser photosensitivity but also confirmed the mode of electron transfer in the quadridentate chelate structure.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Qingyang Pang,Li Bian,Jiebing Xu,Yuhang Jia,Chan Wang,Yingjie Zhang,Qiang Ju,Qiong Wu,Zhenlan Fang
Photochromic transparent wood (PTW) is a kind of highly desirable, green, energy-saving building material with a practical aesthetic. The application of PTW in smart windows still faces daunting challenges owing to the poor stability of photochromic reversibility and low sensitivity to sunlight. In this work, we develop a kind of prominent switchable PTW based on poplar wood (SPTW-P) that shows high sensitivity to sunlight using a new simple fabrication method. In contrast to commonly reported UV-responsive counterpart, our SPTW-P, obtained by microencapsulating active component and polymer with matched refractive index, exhibits the fastest switchable (∼1.5 s) photochromic response to sunlight, high sensitivity of color changing from colorless to peachy pink, strong mechanical strength (87.3 MPa), good transparency, and ideal cycling stability, as evidenced by the 100% maintenance of its original photochromic effect after cycling 30 times. The SPTW-P material not only shows superb UV-blocking (the highest UV-blocking value is up to 97.7%) for protecting skin, excellent thermal insulation for energy saving, good size maintenance, wonderful shape, and chemical stability (100%), but also exhibits excellent aesthetic properties (e.g., moldable aesthetic patterns). This work could promote the development of aesthetic functional transparent wood as sustainable building materials to substantially reduce carbon emissions and energy consumption.
研究领域:
材料科学
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绿色能源
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建筑技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 24
·2201117
·
IF 15.153
Shikun Zhao,Jiangman Sun,Zhen Qin,Yufeng Li,Hao Yu,Guan Wang,Xinggui Gu,Kai Pan
White-light emitting elastomers (WLEEs) based on stimuli-responsive aggregation-induced emission (AIE) and regulated Förster resonance energy transfer (FRET) have aroused increasing attention due to the demands for wearable optoelectronic devices. Herein, the blue and orange AIEgens with different environmental sensitivities are synthesized and then encapsulated on both sides of nanofibers via side-by-side electrospinning aiming to achieve the Janus WLEEs. After regulating the blue-orange AIEgens ratio, efficient and stable white light emission with a CIE coordinate of about (0.33, 0.31) is achieved at a blue-orange AIEgens mass ratio of 3:1. Besides, the Janus nanofibers (Janus-NFs) also present super stretchability with elongation at the break over 150% and tensile strength close to 7 MPa. The sensitivity of fluorescence for Janus-NFs to its stretching deformation is used to visualize the evolution of the microstructure of nanofibers during stretching. Moreover, the Janus-NFs are also sensitive to HCl and NH 3 , of which the fluorescence color would change under HCl and NH 3 fuming above 2 and 57 ppm in air, respectively. The promising applications of the white light Janus-NFs in smart fabrics, warning sensors, and anti-counterfeiting packaging are demonstrated. This finding provides an efficient strategy for achieving wearable WLEEs with multiple functionalities, promoting the development of wearable devices.
研究领域:
材料科学
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光学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 29
·期 8
·12188-12197
·
IF 4.223
Jiang Chengyu,Chen Qingjin
Nanoparticles can undergo aging phenomena in sewage treatment systems, which alter their physical and chemical properties. However, the effect of aged nanoparticles on the dewatering performance of activated sludge under long-term low concentrations is yet to be reported in sewage treatment systems. Here, we compared the chronic effects of pristine and aged TiO 2 nanoparticles on the sludge dewatering index, which includes specific resistance to filtration (SRF) and bound water (BW) in a sequencing batch reactor (SBR) at μg/L concentration levels, and analyzed the relevant mechanisms. The results indicated that aging in the sludge supernatant altered the photosensitivity and water stability of nanoparticles, which was mainly due to the changes in the zeta potential and energy band of the particle and was ultimately attributed to the combined effect of particle surface inclusions such as organic matter and inorganic salt. At 10 μg/L, nanoparticles reduced the sludge dewaterability, which observed an improvement at 100 μg/L. This is because 10 μg/L promoted the secretion of extracellular polymeric substances (EPS), which regulated the structure of sludge flora and increased the abundance of secreted quorum sensing-acyl-homoserine lactones (QS-AHL) and EPS genera, while the corresponding exposure results for 100 μg/L were the opposite, owing to the damage and necrosis effects caused by exposure under long-term light, which reduced EPS production and increased sludge density. Interestingly, aging could alleviate the effects of two exposure concentrations on sludge dewatering, mainly because of the decrease in the photoactivity of the nanoparticles. The results of this study show that environmental aging could delay, but not reverse the results of exposure to specific concentrations of nanoparticles. However, the significantly different ecological effects of photosensitive nanoparticles with two environmentally relevant concentration should be refined and confirmed again in freshwater environments to provide a basis for subsequent scientific management and control of photosensitive nanoparticles.
研究领域:
环境科学
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污水处理
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微生物学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Suhang Chen,Hongsheng Yu,Wei Zhang,Ruiqi Shen,Wei Guo,Luigi T. DeLuca,Haiyang Wang,Yinghua Ye
The aluminum-fluorine reaction hold great potential in crippling Al pre-combustion sintering and agglomeration during combustion. Herein, the laser-sensitive Al/PVDF fuel rich films were prepared by employing a sponge-like microvoids structure through a phase inversion method coupled with micro-segmented flow, displaying the laser power threshold and ignition delay time by less than 4.8 J·cm −2 and 1.57 ms compared to unignited dense Al/PVDF pellet by a 19.6 J·cm −2 laser. The decreased Al atoms plasma electron temperature and a reduced F irons density with the increased Al content, imply a reduction of Al-F reaction ratio. This Al/PVDF films reveal 5 times higher flame propagation rate and mass consumption compared to the vacuum freeze-dried one, contributing to enhanced convective heat transfer in sponge-like microvoids channels. The ambient oxygen and released HF diffusion in microvoids, creating Al-F, Al-O competitive reaction path. The Al-O and Al-F reactions proportions of Al-30, Al-50 and Al-70 in open air were determined by 2:98, 41:59 and 74.5:22 after inferring evaporated AlF 3 combustion products and O 2 reactant by several assumption and calculation based on XPS results. The released gaseous H 2 and AlF 3 from Al droplet surface reduce nano-aluminum sintering. The different reaction paths of Al/PVDF films during combustion and thermal analysis were analyzed.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
·
IF 4.2
Xiaoqin Liu,Jianbo Liu,Wei Li,Qingqing Sheng,Yeming He,Yangyang Wang
Sol–gel method is a low-cost material preparation method; however, it is difficult to obtain a stable sol containing easily hydrolyzable metal ions via this method. In this study, a stable hafnium(IV) oxide (HfO 2 ) sol was prepared by adding benzoyl acetone (BzAcH) modifier. Infrared absorption spectroscopy results showed that the BzAcH additive chelated with the Hf 4+ ions in the sol, thus improving the hydrolysis resistance of the HfO 2 sol, which in turn improved its stability. It was also found that the BzAcH-modified HfO 2 gel film exhibited ultraviolet (UV) photosensitivity. After UV exposure, the film did not dissolve easily in organic solvents . Based on these properties, the micro processing of the HfO 2 film was preliminarily explored, and HfO 2 microstructures were successfully obtained. Additionally, the relative permittivity ( ε r ) of HfO 2 exhibited minimum (∼10.9) and maximum (∼20.6) values at heat-treatment (HT) temperatures of 350 and 450 °C, respectively. With the continuous increase in the HT temperature, ε r first decreased and then increased slightly. Moreover, the current–voltage curves showed that the Pt/HfO 2 /LaNiO 3 (LNO) structure exhibited a pronounced bipolar resistive switching (RS) effect, which was attributed to the fact that LNO could be used as an electrode and an oxygen vacancy (OV 2+ ) storage layer for RS materials. Notably, the oxygen ions in HfO 2 with a low degree of crystallinity are more likely to migrate within its body (which makes it easier to form OV 2+ s), therefore, the “Set” voltage of low-crystallinity HfO 2 films is lower than that of high-crystallinity HfO 2 films. The RS mechanism can be explained by the OV 2+ conductive filament model. These results are of great practical significance for the low-cost preparation of HfO 2 and the application of LNO as an oxide electrode.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2023
·
IF 15
Qianqian Wang,Hao Cui,Xiaolin Wang,Ziyu Hu,Peipei Tao,Mingyang Li,Jianlong Wang,Yaping Tang,Hong Xu,Xiangming He
Lithographic patterning, which utilizes the solubility switch of photoresists to convert optical signals into nanostructures on the substrate, is the primary top-down approach for nanoscale fabrication. However, the low light/electron-energy conversion efficiency severely limits the throughput of lithography. Thiol–ene reaction, as a photoinitiated radical addition reaction, is widely known as click reaction in the field of chemistry due to its extremely high efficiency. Here, we introduce a click lithography strategy utilizing the rapid thiol–ene click reaction to realize ultraefficient nanofabrication. This novel approach facilitated by the implementation of ultrahigh-functionality material designs enables high-contrast patterning of metal-containing nanoclusters under an extremely low deep-ultraviolet exposure dose, e.g., 7.5 mJ cm–2, which is 10–20 times lower than the dose used in the photoacid generator-based photoresist system. Meanwhile, 45 nm dense patterns were also achieved at a low dose using electron beam lithography, revealing the great potential of this approach in high-resolution patterning. Our results demonstrated the high-sensitivity and high-resolution features of click lithography, providing inspiration for future lithography design.
研究领域:
材料科学
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纳米技术
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化学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yu Han,Jun Li,Shuhuan Hao,Wan-Zhen Fo,Liwen Cao,Mengjiao Li,Yanan Liu,Jianhua Zhang
Photonic synaptic transistors, designed to emulate the multispectral light detection of retinal neurons, play a pivotal role in advancing artificial vision systems capable of full-color image recognition. However, their limited sensitivity to weak and multispectral light significantly hampers their application in full-color image capture and recognition. In this work, a p-i-n structured synaptic transistor is introduced that improves weak light sensitivity and enhances synaptic performance by addressing interface issues. By integrating P3HT/LiF/InZnGdO nanofibers as p-i-n structure, the spectral response is successfully broadened from visible to near-UV region, achieving sensitivity to light intensities as low as 0.05 mW cm −2 . The device exhibits remarkable PPF characteristics across the wavelength range of 395–633 nm, with the PPF index showing a maximum increase of 84% compared to the single InZnGdO nanofiber device. Additionally, multiple neural networks are constructed with data from the synaptic transistor array driven by wavelength-tunable synaptic plasticity to validate the device's feasibility in various application scenarios. The proposed device achieved a recognition accuracy of up to 95.26% for high-precision full-color images based on the public CIFAR-10 dataset. This p-i-n structure offers a novel pathway to enhance the synaptic performance of metal oxide-based synaptic transistors, advancing the development of next-generation artificial vision.
研究领域:
神经形态工程
·
光电子学
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人工智能
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材料科学
·
传感器与探测器
✓ 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）