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学者姓名：李昂
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Abstract ：
The research and development of high-performance NH3 sensors are of great significance for environment monitoring and disease diagnosis applications. Two-dimensional (2D) MoS2 nanomaterials have exhibited great potential for building room-temperature (RT) NH3 sensors but still suffer from relatively low sensitivity. Herein, the TiO2-modified monolayer MoS2 films with controllable TiO2 loading contents are fabricated by a facile approach. A remarkable enhancement in the RT NH3 sensing performance is achieved after the n-n hetero-compositing of the TiO2/MoS2 system. The device with 95% surface coverage of TiO2 shows enhanced sensor response, low detection limit (0.5 ppm), wide detection range (0.5-1000 ppm), good repeatability, and superior selectivity against other gases. In situ Kelvin potential force microscopy results revealed that the TiO2 modification not only improved the surface reactivity of the sensing layers but also contributed to the NH3 sensing performance by serving as the "gas-gating" layers that modulated the electron depletion layer and the conductivity of the MoS2 films. Such an n-n hetero-compositing strategy can provide a simple and cost-effective approach for developing high-performance NH3 sensors based on 2D semiconductors.
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| GB/T 7714 | Tan, Lun , Liu, Xianzhen , Wu, Peng et al. TiO2-modified MoS2 monolayer films enable sensitive NH3 sensing at room temperature [J]. | NANOSCALE , 2023 , 15 (35) : 14514-14522 . |
| MLA | Tan, Lun et al. "TiO2-modified MoS2 monolayer films enable sensitive NH3 sensing at room temperature" . | NANOSCALE 15 . 35 (2023) : 14514-14522 . |
| APA | Tan, Lun , Liu, Xianzhen , Wu, Peng , Cao, Liwei , Li, Wei , Li, Ang et al. TiO2-modified MoS2 monolayer films enable sensitive NH3 sensing at room temperature . | NANOSCALE , 2023 , 15 (35) , 14514-14522 . |
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Abstract ：
Transition metal dichalcogenide (TMDC) monolayers exhibit enhanced electrical and optoelectrical properties, which are promising for next-generation optoelectronic devices. However, large-scale and uniform growth of TMDC monolayers with large grain size is still a considerable challenge. Presented in this work is a simple and effective approach to fabricating largescale molybdenum (MoS2) disulfide monolayers by chemical vapor deposition (CVD) method. It is found that MoS2 grows from single crystal into thin film with the increase of oxide precursor proportion. The photodetector of large scale monolayer layer MoS2 film is fabricated by depositing metal electrodes on the interdigital electrode mask through using thermal evaporation coating. Finally, the highly stable and repeatable photoelectric responses under the conditions of different voltages and different laser power are characterized under 405-nm laser excitation, with response time decreasing down to the order of milliseconds (ms). In addition, the photodetector achieves a wide spectral detection range from 405 nm to 830 nm, that is, from visible light to near-infrared light wavelength range, with optical response (R) of 291.7 mA/W and optical detection rate (D*) of 1.629x109 Jones. The monolayer MoS2 thin film photodetector demonstrated here has the advantages of low cost, feasibility of large-scale preparation, and good stability and repeatability in the wide spectrum range from visible light to near infrared light wavelength, providing the possibilities for future applications of electronic and optoelectronic devices .
Keyword ：
photoelectric response photoelectric response chemical vapor deposition chemical vapor deposition MoS2 MoS2 photodetector photodetector
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| GB/T 7714 | Peng, Wu , Lun, Tan , Wei, Li et al. Preparation and photoelectric property of large scale monolayer MoS2 [J]. | ACTA PHYSICA SINICA , 2023 , 72 (11) . |
| MLA | Peng, Wu et al. "Preparation and photoelectric property of large scale monolayer MoS2" . | ACTA PHYSICA SINICA 72 . 11 (2023) . |
| APA | Peng, Wu , Lun, Tan , Wei, Li , Li-Wei, Cao , Jun-Bo, Zhao , Yao, Qu et al. Preparation and photoelectric property of large scale monolayer MoS2 . | ACTA PHYSICA SINICA , 2023 , 72 (11) . |
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Abstract ：
过渡金属硫族化合物(TMDCs)材料具有优异的电学和光电性能,在下一代光电子器件中具有广阔的应用前景.然而,大面积均匀生长单层的TMDCs仍然具有相当大的挑战.本工作提出了一种简单而有效的利用化学气相沉积(CVD)制备大面积单层二硫化钼(MoS_2)的方法,并通过调整氧化物前驱体的比例,调整MoS_2单晶/薄膜生长.随后,利用叉指电极掩膜板制备出单层MoS_2薄膜光电探测器.最后,在405 nm激光激发下,不同电压和不同激光功率条件下均表现出高稳定和可重复的光电响应,响应时间可达毫秒(ms)量级.此外,该光电探测器实现了405—830 nm的可见光到近红外的宽光谱检测范围,光响应度(R)高达291.7 mA/W,光探测率(D~*)最高达1.629×10~9 Jones.基于该CVD制备的单层MoS2薄膜光电探测器具有成本低、能大规模制备,且在可见光到近红外的宽光谱范围内具有良好的稳定性和重复性的优点,为未来电子和光电子器件的应用提供了更多的可能性.
Keyword ：
光电响应 光电响应 MoS_2 MoS_2 光电探测器 光电探测器 化学气相沉积 化学气相沉积
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| GB/T 7714 | 武鹏 , 谈论 , 李炜 et al. 大面积单层二硫化钼的制备及其光电性能 [J]. | 物理学报 , 2023 , 72 (11) : 302-308 . |
| MLA | 武鹏 et al. "大面积单层二硫化钼的制备及其光电性能" . | 物理学报 72 . 11 (2023) : 302-308 . |
| APA | 武鹏 , 谈论 , 李炜 , 曹立伟 , 赵俊博 , 曲尧 et al. 大面积单层二硫化钼的制备及其光电性能 . | 物理学报 , 2023 , 72 (11) , 302-308 . |
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Abstract ：
In order to use III-V compound semiconductors as active channel materials in advanced electronic and quantum devices, it is important to achieve a good epitaxial growth on silicon substrates. As a first step toward this, we report on the selective-area growth of GaP/InGaP/InP/InAsP buffer layer nanotemplates on GaP substrates which are closely lattice-matched to silicon, suitable for the integration of in-plane InAs nanowires. Scanning electron microscopy reveals a perfect surface selectivity and uniform layer growth inside 150 and 200 nm large SiO2 mask openings. Compositional and structural characterization of the optimized structure performed by transmission electron microscopy shows the evolution of the major facet planes and allows a strain distribution analysis. Chemically uniform layers with well-defined heterointerfaces are obtained, and the topmost InAs layer is free from any dislocation. Our study demonstrates that a growth sequence of thin layers with progressively increasing lattice parameters is effective to efficiently relax the strain and eventually obtain high quality in-plane InAs nanowires on large lattice-mismatched substrates.
Keyword ：
InAs InAs in-plane nanowires in-plane nanowires selective-area epitaxy selective-area epitaxy
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| GB/T 7714 | Zannier, Valentina , Li, Ang , Rossi, Francesca et al. Selective-Area Epitaxy of InGaAsP Buffer Multilayer for In-Plane InAs Nanowire Integration [J]. | MATERIALS , 2022 , 15 (7) . |
| MLA | Zannier, Valentina et al. "Selective-Area Epitaxy of InGaAsP Buffer Multilayer for In-Plane InAs Nanowire Integration" . | MATERIALS 15 . 7 (2022) . |
| APA | Zannier, Valentina , Li, Ang , Rossi, Francesca , Yadav, Sachin , Petersson, Karl , Sorba, Lucia . Selective-Area Epitaxy of InGaAsP Buffer Multilayer for In-Plane InAs Nanowire Integration . | MATERIALS , 2022 , 15 (7) . |
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Abstract ：
In situ environmental transmission electron microscope (ETEM) could provide intuitive and solid proof for the local structure and chemical evolution of materials under practical working conditions. In particular, coupled with atmosphere and thermal field, the behavior of nano catalysts could be directly observed during the catalytic reaction. Through the change of lattice structure, it can directly correlate the relationship between the structure, size and properties of materials in the nanoscale, and further directly and accurately, which is of great guiding value for the study of catalysis mechanism and the optimization of catalysts. As an outstanding catalytic material in the application of methane reforming, molybdenum oxide (MoO3)-based materials and its deoxidation process were studied by in situ ETEM method. The corresponding microstructures and components evolution were analyzed by diffraction, high-resolution transmission electron microscopy (HRTEM) and electron energy loss spectrum (EELS) techniques. MoO3 had a good directional deoxidation process accompanied with the process of nanoparticles crushing and regrowth in hydrogen (H-2) and thermal field. However, in the absence of H-2, the samples would exhibit different structural evolution.
Keyword ：
MoO3 MoO3 TEM TEM deoxidation deoxidation in situ in situ
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| GB/T 7714 | Ma, Peijie , Li, Ang , Wang, Lihua et al. Investigation of Deoxidation Process of MoO3 Using Environmental TEM [J]. | MATERIALS , 2022 , 15 (1) . |
| MLA | Ma, Peijie et al. "Investigation of Deoxidation Process of MoO3 Using Environmental TEM" . | MATERIALS 15 . 1 (2022) . |
| APA | Ma, Peijie , Li, Ang , Wang, Lihua , Zheng, Kun . Investigation of Deoxidation Process of MoO3 Using Environmental TEM . | MATERIALS , 2022 , 15 (1) . |
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Abstract ：
The outstanding corrosion resistance of stainless-steel is from its passive oxide. Environmental transmission electron microscope was used in a modern atomic-scale in situ initial oxidation analysis process to reveal the microstructural and elemental variation on its breakdown. An amorphous oxide layer was the main oxide when temperatures is lower than 500 degrees C, and pits formed from 500 degrees C, and a porous structure formed from 700 degrees C. The protective passive films on the oxide/alloy interface were damaged by priority structural oxidation and prompted further alloy failure. The study provides direct experimental data beyond that of traditional research.
Keyword ：
ETEM ETEM Atomic scale Atomic scale In situ In situ Stainless steel Stainless steel Oxidation Oxidation
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| GB/T 7714 | Chen, Yanhui , Tang, Pengfei , Qiao, Shihang et al. Dynamic breakdown of passive films on stainless steel during in situ thermal oxidation [J]. | CORROSION SCIENCE , 2022 , 209 . |
| MLA | Chen, Yanhui et al. "Dynamic breakdown of passive films on stainless steel during in situ thermal oxidation" . | CORROSION SCIENCE 209 (2022) . |
| APA | Chen, Yanhui , Tang, Pengfei , Qiao, Shihang , Liu, Shanshan , Yang, Xiaomeng , Li, Ang . Dynamic breakdown of passive films on stainless steel during in situ thermal oxidation . | CORROSION SCIENCE , 2022 , 209 . |
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Abstract ：
一种耐高温硅橡胶材料及其制备方法属于硅橡胶材料技术领域。其特征在于，由以下质量分数组分原料构成：甲基乙烯基生胶100‑130份、白炭黑30‑50份、羟基硅油5‑10份，硫化剂1.5份，原子级分布的金属钨的氧化物的纳米氧化锆1‑10份。在纳米氧化锆上单原子，将其添加到硅橡胶中。在长时间的高温作用下，具有能大幅度维持硅橡胶物理性能的优点，并且操作简单。
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| GB/T 7714 | 王聪 , 李昂 , 韩晓东 . 一种耐高温硅橡胶材料及其制备方法 : CN202211447917.7[P]. | 2022-11-18 . |
| MLA | 王聪 et al. "一种耐高温硅橡胶材料及其制备方法" : CN202211447917.7. | 2022-11-18 . |
| APA | 王聪 , 李昂 , 韩晓东 . 一种耐高温硅橡胶材料及其制备方法 : CN202211447917.7. | 2022-11-18 . |
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Abstract ：
通过光学显微镜、扫描电镜(SEM)、电子背散射衍射(EBSD)、显微硬度试验和拉伸试验,研究了转速为400、800、1200 r/min时,水冷和空冷对5E83铝合金搅拌摩擦焊接头组织与性能的影响。结果表明,与空冷条件相比,水冷条件下搅拌摩擦焊接头产生的飞边减少,洋葱环形成区域缩减、焊核区的硬度明显提高。当转速为800 r/min时,与空冷条件相比,水冷条件下接头的抗拉强度提高,接头效率提高11%,硬度提高11%,同时焊核区的平均晶粒尺寸减小43%,但空冷条件下接头断口的韧窝大而深,塑性较好,水冷条件下的断口韧窝小而浅,塑性下降。
Keyword ：
搅拌摩擦焊 搅拌摩擦焊 冷却条件 冷却条件 抗拉强度 抗拉强度 平均晶粒尺寸 平均晶粒尺寸 5E83铝合金 5E83铝合金
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| GB/T 7714 | 李昂 , 高坤元 , 文胜平 et al. 冷却条件对5E83铝合金搅拌摩擦焊接头组织与性能的影响 [J]. | 金属热处理 , 2022 , 47 (01) : 130-134 . |
| MLA | 李昂 et al. "冷却条件对5E83铝合金搅拌摩擦焊接头组织与性能的影响" . | 金属热处理 47 . 01 (2022) : 130-134 . |
| APA | 李昂 , 高坤元 , 文胜平 , 黄晖 , 聂祚仁 . 冷却条件对5E83铝合金搅拌摩擦焊接头组织与性能的影响 . | 金属热处理 , 2022 , 47 (01) , 130-134 . |
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Abstract ：
在各种气体传感器中,基于金属半导体的气体传感器具有独特的优势.与其他传感器相比,基于金属氧化物半导体的气体传感器既便宜又易于制造,此外,它还具有响应速度快、恢复速度快、灵敏度高等优点,具有很大的应用潜力.常见的金属氧化物材料有ZnO、SnO2、WOx等,其中,氧化钨(WOx)由于其优异的电学和光学性能被广泛应用于传感、催化、电池等领域.本文总结了氧化钨(WOx)的合成和结构,着重概括了化学计量的WO3及亚化学计量的氧化钨(WO3-x,0<x<1)在气体传感器领域的研究现状和进展,并整理了相关气敏传感机理,最后展望了WOx基传感器的发展趋势.
Keyword ：
气敏传感器 气敏传感器 WOx WOx 金属氧化物 金属氧化物 气敏传感机理 气敏传感机理
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| GB/T 7714 | 黄景萍 , 曹立伟 , 李昂 . WOx基气敏材料的研究进展 [J]. | 科技创新导报 , 2022 , 19 (16) : 15-21,118 . |
| MLA | 黄景萍 et al. "WOx基气敏材料的研究进展" . | 科技创新导报 19 . 16 (2022) : 15-21,118 . |
| APA | 黄景萍 , 曹立伟 , 李昂 . WOx基气敏材料的研究进展 . | 科技创新导报 , 2022 , 19 (16) , 15-21,118 . |
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Abstract ：
First-stage gas turbine blades in an airplane undergo extreme operating conditions under high temperature and high stress conditions, usually causing nonhomogeneous microstructural degradation. The detailed characterization of temperature-and stress-induced microstructural degradation, dislocation and elemental variation are keys for failure analysis. In our study, we systematically investigate microstructural degradation on an ex serviced second-generation superalloy-based turbine blade from an aeroengine. Defects in trailing edges are mainly sparse dislocation networks, exhibit a low stacking fault density, and are in an initial rafting stage in most regions. The most severely degraded region is in a middle stage of creep, with high densities of network dislocations in the gamma phase and stacking faults in the gamma' phase. An overall reorganization of ex-service turbine blades is built, and the relationship between service and microstructural degradation is revealed. With this study, we provide guidance on microstructural degradation evaluation and failure analysis in conventional single-crystal turbine blades.
Keyword ：
Turbine blade Turbine blade Superalloy Superalloy Defects Defects Microstructural degradation Microstructural degradation Failure analysis Failure analysis
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| GB/T 7714 | Lu, Hui , Zhang, Wenhan , Chen, Yanhui et al. Structural degradation and elemental variations in an ex-service first-stage gas turbine blade [J]. | MATERIALS CHARACTERIZATION , 2022 , 196 . |
| MLA | Lu, Hui et al. "Structural degradation and elemental variations in an ex-service first-stage gas turbine blade" . | MATERIALS CHARACTERIZATION 196 (2022) . |
| APA | Lu, Hui , Zhang, Wenhan , Chen, Yanhui , Zhai, Yadi , Wang, Wenshuai , Long, Haibo et al. Structural degradation and elemental variations in an ex-service first-stage gas turbine blade . | MATERIALS CHARACTERIZATION , 2022 , 196 . |
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