JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Junqian Zhao,Huaina Yu,Shusheng Pan,Shang Zhou,Li Zhong,Hua Wang,Yuan Yuan Luo,SiuFung Yu,Guanghai Li
CsPbI 3 sub-micrometer wires were synthesized by one-pot solution method at near room temperature . The wires are single crystalline with [100] orientation. An strong emission band centered at 470 nm was observed under ultraviolet excitation, and the emission intensity and bandwidth are dependent on the molar ratio of CsI/PbI 2 in the wires. A bright green emission with a lifetime of several tens ns was observed when excited with a soft X-ray, and the spectral response range can be modulated by the molar ratio of CsI/PbI 2 in the wires. The growth mechanism of the wires was discussed, and the influences of the cycling strain and X-ray irrigation time on the X-ray excited optical luminescence of the CsI/PbI 2 wires/PET film were analyzed and discussed.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2025
·
IF 4.1
Hongwei Su,Qing Guo,Hongtao Li,Alei Li,Yunlei Zhong,Xu Zhang,Lin Geng,Shuai Liu,Liuqi Dong,Xiaohang Pan,Lin Wang,Lixing Kang
Developing low-cost, high-performance metal-free electrocatalysts is crucial for sustainable oxygen evolution reactions (OERs) in alkaline media. Here, we synthesized ultra-long boron phosphide (BP) microwires along the [111] crystal axis with high yield. By controlling temperature and adding Ni, we identified Ni’s role as a flux and transport agent, optimizing BP microwires at 1050°C. Electrical property and band structure analysis revealed BP as a one-dimensional p-type semiconductor with a wide band gap. We constructed an on-chip electrocatalytic microdevice using individual BP microwires to evaluate OER performance. In 1M NaOH, the BP electrode achieved 50 mA cm −2 at an overpotential of 320 mV, outperforming other boron-based catalysts. Additionally, the nanocatalyst exhibited a low Tafel value (88 mV·dec −1 ) and excellent stability. This study offers valuable insights for developing future electrocatalysts and electrochemical reaction models.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Shanshan Yan,Kaiyang Wang,Guichuan Xing,Jincheng Xu,Shichen Su,Zikang Tang,Shuangpeng Wang,Kar Wei Ng
Hybrid organic–inorganic lead halide perovskite microwires are potential building blocks for realizing on-chip integrated optoelectronic devices. However, the length-controllable synthesis of one-dimensional hybrid perovskite microwires has been rarely reported, especially the ones with lengths in the millimeter scale. Herein, methylammonium lead bromide (MAPbBr3) and formamidinium lead bromide (FAPbBr3) micro and milliwires are demonstrated using single-crystal PbBr2 microwires synthesized via template-free solution-phase growth as the lattice framework. Following the PbBr2 template, the as-converted perovskite microwires possess controllable lengths ranging from tens to thousands of micrometers. In addition, Fabry–Perot (FP) lasing was realized in both MAPbBr3 and FAPbBr3 microwires, attesting to their excellent crystal quality and the efficient optical confinement of the natural cavity. These unique properties result in the first demonstration of FP perovskite microwire lasers with submillimeter lengths. More interestingly, the microwire lasers show excellent photostability under repetitive pulsed laser excitation for over 8 × 106 cycles. Such findings demonstrate that the solution-converted hybrid lead bromide microwires have excellent optoelectronic performances promising for practical applications, and the size controllability indicates that this novel fabrication process may be feasible for large-scale industrial production.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhixin Wang,Xiaohan Sun,Zilong Guo,Rubing Xi,Lingyun Xu,Zhihao Zhao,Yinghao Ge,Ziquan Cao,Xiangyu Jiang,Wensheng Yang,Lei Jiang
High-performance flexible transparent electrodes are the basis for the continuous upgrading of optoelectronic devices. Silver grids are attractive for replacing traditional indium tin oxide (ITO) as the premier transparent electrode materials, due to their high transmittance, excellent conductivity, and low cost. However, large linewidth and oxidation of silver grids are limiting the practical application of the resulting optoelectronic devices. Here, we report an effective and scalable solution-based method to prepare highly stable flexible transparent silver grid electrodes with submicron linewidth by the asymmetric wettability template-assisted self-assembly of silver nanoparticles (AgNPs), which is then encapsulated by a thin transparent conductive ionogel as protective layer. It is demonstrated that the linewidth of silver grids can be precisely controlled by the concentration of the AgNP dispersion. Wrapping with the ionogel nanolayer have no deterioration for conductivity and transmittance of the grid electrodes. The optimized hybrid grid electrodes exhibit low sheet resistance of 24.6 Ω sq −1 and high transparency of 99%. More importantly, the introduction of the iongel nanolayer endows the hybrid grid electrodes with excellent mechanical flexibility and thermal, electrical, and chemical stability. As a proof of concept demonstration, the submicron linewidth silver grid/ionogel hybrid films are successfully used to fabricate flexible smart windows and transparent touch panel. We envision that this work will shed new light on the development of next-generation optoelectronic applications which need ultrahigh resolution displays.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
NEW CARBON MATERIALS
·
2017
·
IF 1.02
Li-fang Shi,Jun-zhe Liu,Jun-he Yang,Ling-fei Cai,Li-yun Shi,Han-xun Qiu
Silver microwires (AgMWs) were made amphiphilic by non-covalent functionalization with poly (vinyl pyrrolidone) and hexadecyl mercaptan. The Langmuir-Blodgett (LB) technique was used to transfer graphene oxide (GO) and the functionalized AgMWs (F-AgMWs) onto a quartz substrate to obtain GO-AgMW hybrid films. The films had a high optical transparency and an antibacterial property against Escherichia coli ( E. coli ). It is proposed that the GO layer not only acts as an adhesive layer for AgMWs, but also is acidic, which provides an ideal reaction condition for AgMWs to release the Ag + ions that fight E. coli . The influence of pH value on the antibacterial property of the hybrid films was investigated in order to verify the proposed mechanism. Further development of this method may provide a way to produce next generation transparent multifunctional thin films with antibacterial properties.
研究领域:
材料科学
·
纳米科技
·
生物医学工程
·
表面科学
·
抗菌材料
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2010
·Vol. 208
·期 2
·466-470
·
IF 1.228
Chuanyi Tao,Xueming Li,Wenlin Feng,Jianchun Yang,Wulin Li,Yongfu Li,Wenjing Yang
Based on the thermal evaporation of silicon monoxide at high temperature, an improved method has been developed for large-scale synthesis of ultralong amorphous silica sub-micron wires using polished p-Si wafers as substrates. The synthesis was done with and without thermite. The morphology and structure of the silica wires was investigated through field-emission scanning electron microscope equipped with energy dispersive X-ray spectroscopy, and X-ray diffractometer. Almost uniform sub-micron wires with average diameters of 300 nm and length up to hundreds of micrometers were obtained in presence of thermite while sub-micron wires with many curved segments were obtained in absence of the thermite. Both forms of silica wires emitted blue lights at 478 nm (∼2.6 eV) under excitation at 351 nm (∼3.5 eV), while intense anti-Stokes blue emissions at 464 nm (∼2.7 eV) were observed under the 694 nm (∼1.8 eV) excitation due to the upconversion effect. This effect is associated with defect centers arising from high oxygen deficiency. The emissions from oxygen deficiency centers might be caused by multistep energy transfer from nonbridging oxygen hole centers to oxygen deficiency centers.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Jiajie Yu,Dongping Sun,Tianhe Wang,Feng Li
Conventional ZnO powder catalysts possess excellent stability and photocatalytic activity, but have great difficulties for separation and regeneration after the reaction and require ultraviolet irradiation (less than 5% of solar energy), thus restricting practical applications. In this paper, unique short submicron wire-like ZnO films were successfully prepared on silicate glass substrates by calcination of spin-coated zinc acetate solution in the presence of ethanolamine (EA). A typical synthesis yields ZnO submicron wires with ca. 50–120 nm in diameter, 15–30 μm in length and 0.5–1.5 μm in height. Ag@AgCl particles were deposited on short ZnO submicron wire films by a simple impregnating-precipitation-photoreduction method. The as-prepared Ag@AgCl/ZnO film exhibited efficient photocatalytic performance under visible light irradiation and excellent self-cleaning capability under solar light. This film photocatalysts were easy to separate from the reaction, and the tests showed that the films were reusable for four times without significantly loosing efficiency. Additionally, gas chromatography–mass spectroscopy (GC–MS) was applied to investigate the degraded chemical species resulted from the photo-catalytic degradation of methylene blue (MB) and methyl orange (MO) dyes under Ag@AgCl/ZnO. A possible photocatalytic mechanism was proposed based on the photoelectrochemical measurements and radical trapping experiments.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2011
·
IF 1.384
Chuanyi Tao,Xueming Li,Wenjing Yang
Hook-shaped and straight silica wires have been successfully synthesized on silicon wafer through a simple thermal vapor method with or without assistance of Al , respectively. The hook-shaped silica wires have amorphous structures with nearly 100 μm long and about 4 μm in average diameters, while the straight silica wires are hundreds of micrometers long and approximately 50–300 nm in diameters. The composition analysis revealed that larger Al/SiO x islands can form on the silicon substrate with Al catalysts, whereas tiny silica clusters form without Al catalysts. They could act as the nucleation centers for the growth of silica wires with different shapes. The formation process of hook-shaped silica microwire results from a thermal gradient on the silicon substrate. The thermal gradient may be caused by the cold gas flowing during the process or other factors that lead to uneven temperature. On the contrary, straight growth of silica submicrowire is unacted on the thermal gradient factor due to the tiny silica clusters as nucleation centers. The present simple and low-cost process of producing hook-shaped and straight silica wires in bulk may lead to potential applications in catalysts, electrode materials, biosensing, etc.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 13
·5055-5062
·
IF 6.482
Hongyan Xia,Yibin Zhu,Xueliu Chen,Tingkuo Chen,Dao Zhang,Xiang Li,Fangcheng Shen,Haiming Jiang,Kang Xie
Multi-component hybrid optical heterojunctions assembled from chromophore-doped polymer microwires are one of the first choices of building blocks for the construction of complex/integrated functional photonic devices, because they not only have the advantages of the individual components (optical confinement from one-dimensional microstructures, high emission efficiency from chromophore and flexibility from polymer matrix), but also bring novel performances to the system by the synergetic interactions between multiple components which cannot be obtained from single components. Herein, we propose a strategy to construct different waveguide heterojunctions through arrangement and combination of two kinds of polymer doped optical microwires via micromanipulation. One of them (MW1) contains carboxyl-fluorescein and photochromic spiropyran which will undergo photoisomerization upon external light stimuli, producing tunable fluorescence (FL) emission for MW1 due to the adjustable fluorescence resonance energy transfer. The other (MW2) is embedded with the dye rhodamine 6G whose FL always remains almost unchanged. Waveguide logic gate, switch and modulator within these heterojunctions can be well realized by changing the external light stimuli and excitation position. Our study indicates that these tunable-emission microwire heterojunctions composed of responsive dye molecules would provide a novel tactic in developing multi-functional advanced waveguides for integrated micro/nanophotonic devices and circuits.
研究领域:
光学
·
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2018
·Vol. 10
·期 10
·2248-2253
·
IF 4.674
Jiahui Chen,Yunming Li,Guoqing Sheng,Lu Xu,Huangqing Ye,Xian-Zhu Fu,Rong Sun,Ching-Ping Wong
Graphical Non-noble-metal-based electrocatalyst : Fe-doped Ni 2 P nanosheets in situ grown on Ni submicrowires show superior electrocatalytic performance toward oxygen evolution reaction to some state-of-the-art catalysts in alkaline solution. Tens of micrometers long metallic Ni submicrowires with a diameter of approximately 200 nm are prepared by a chemical reduction method under a magnetic field. Fe-doped Ni 2 P nanosheets are then in situ grown on Ni submicrowires by a simple wet-chemical reaction followed by a low-temperature phosphorization process. The (Ni 0.87 Fe 0.13 ) 2 P–Ni composite exhibits the highest catalytic activity toward oxygen evolution reaction in alkaline solution among all the as-prepared (Ni 1− x Fe x ) 2 P–Ni catalysts, delivering a current density of 10 mA cm −2 at an overpotential of only 257 mV and keeping high stability over 10 h electrolysis. These exceptional activities are attributed to the unique structure combining metallic Ni submicrowires as good electronically conductive substrate and the in situ grown Fe-doped Ni 2 P nanosheets. Specifically, Fe incorporation leads to strong electron interactions between Ni, Fe, and P, fast reaction kinetics, small charge-transfer resistance, and a large electrochemical surface area, which are responsible for the excellent catalytic performance.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 32
·2401539
·
IF 8
Qianjin Wang,Zhilin Xiang,Peizhi Yang,Yingkai Liu,Qiuhong Tan
Metal halide perovskites recently have emerged as a promising candidate for photodetection due to their exceptional photoelectric performance. However, the high dark current in these materials has hindered their practical application to imaging. In this study, a novel halogen-mixed CsPbIBr 2 microwire photodetector that has a remarkable reduction of dark current by over 100-fold (compared to CsPbBr 3 ), along with a substantial increase in photocurrent, which yields a significantly improved on/off ratio of 6.56 × 10 4 , is developed. More importantly, the halogen-mixed perovskite photodetector exhibits enhanced photodetection performance, including a high responsivity of 133 A W −1 and a remarkable specific detectivity of 4.02 × 10 12 Jones even under ultraweak light conditions as low as 4.5 nW cm −2 . More specifically, high-resolution images are successfully obtained under ultraweak light conditions. The combined analysis of experimental results and first-principles calculation attribute the excellent performance of the CsPbIBr₂ microwire photodetector to a significant reduction in dark current by suppressing ion migration and increasing carrier effective mass, and a remarkable increase in photocurrent resulting from reduced bandgap and enhanced light absorption, as compared to CsPbBr 3 . This research represents a significant advancement in the development of high-performance 1D perovskite-based photodetectors, with promising implications for ultra-weak light imaging applications.
研究领域:
光电子学
·
材料科学
·
纳米器件
·
半导体物理
·
生物医学成像
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Yang Yaqian,Ran Wenhao,Li Ying,Chen Yancheng,Chen Di,Shen Guozhen
Biological vision system-inspired optoelectronic synapses integrate sensing, memory, and processing for external information perception. However, most efforts focus on spatial expansion while overlooking critical dimensions like polarization and temporal evolution, which are critical for information extraction in complex environments. Inspired by the polarization-sensitive properties of kingfisher vision, we develop a polarization-sensitive optoelectronic synapse array device based on PEA 2 SnI 4 microwires array. Their anisotropic properties ensure polarization recognition, achieving a dichroic ratio of 1.38. And the asymmetric electrode designs create differentiated contact barriers, facilitating efficient charge storage and erasure under low power consumption. By employing four polarization-state-dependent convolutional kernels, the device demonstrates edge extraction capabilities even under 50% salt pepper noise. Furthermore, it enables high-precision in-sensor reservoir computing, with 100% accuracy in extracting fish trajectories under complex light environments. This work demonstrates motion perception in complex environments and provides a foundation for developing multi-dimensional, time-resolved visual systems for intelligent sensing and recognition.
研究领域:
神经形态工程
·
光电子学
·
人工智能
·
传感器技术
·
材料科学
·
计算机视觉
·
信息处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）