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学者姓名：李昂
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摘要 ：
This review discusses the utilization of metal halide perovskite (MHP) materials in X-ray direct imaging detectors for medical application. Compared to traditional semiconductors, MHP has multiple advantages including high linear attenuation coefficient, low exciton binding energy, long carrier diffusion length, and high carrier mobility. These ascendancies allow for low-dose and high-resolution medical imaging. Apartment from a historical overview of the develop-X-ray direct imaging detectors and their performance indicators, this review specifically focuses on the development and innovation of X-ray direct imaging detectors using MHP materials. The article concludes by identifying existing challenges and discussing the potential application of perovskite X-ray direct imaging detectors in the medical industry. Apartment from a historical overview of the develop-X-ray direct imaging detectors and their performance indicators, this review specifically focuses on the development, innovation, and utilization of X-ray direct imaging detectors using MHP materials. The article concludes by identifying existing challenges and discussing the potential application of perovskite X-ray direct imaging detectors in the medical industry. image
关键词 ：
direct detector direct detector medical imaging medical imaging x-ray x-ray perovskite perovskite
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| GB/T 7714 | Fan, Jinyang , Li, Wei , Zhou, Quan et al. Metal Halide Perovskites for Direct X-Ray Detection in Medical Imaging: To Higher Performance [J]. | ADVANCED FUNCTIONAL MATERIALS , 2024 . |
| MLA | Fan, Jinyang et al. "Metal Halide Perovskites for Direct X-Ray Detection in Medical Imaging: To Higher Performance" . | ADVANCED FUNCTIONAL MATERIALS (2024) . |
| APA | Fan, Jinyang , Li, Wei , Zhou, Quan , Yang, Guo , Tang, Pengfei , He, Junhai et al. Metal Halide Perovskites for Direct X-Ray Detection in Medical Imaging: To Higher Performance . | ADVANCED FUNCTIONAL MATERIALS , 2024 . |
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摘要 ：
The extremely high structural tolerance of ceria to oxygen vacancies (O-v) has made it a desirable catalytic material for the hydrocarbon oxidation to chemicals and pharmaceuticals and the reduction of gaseous pollutants. It is proposed that the formation and diffusion of O-v originate from its outstanding reduction property. However, the formation and diffusion process of Ov over the surface of ceria at the atomic level is still unknown. Herein, the structural and valence evolution of CeO2 (111) surfaces in reductive, oxidative and vacuum environments from room temperature up to 700 degrees C was studied with in situ aberration-corrected environmental transmission electron microscopy (ETEM) experiments. O-v is found to form under a high vacuum at elevated temperatures; however, the surface can recover to the initial state through the adsorption of oxygen atoms in an oxygen-contained environment. Furthermore, in hydrogen environment, the step-CeO2 (111) surface is not stable at elevated temperatures; thus, the steps tend to be eliminated with increasing temperature. Combined with first-principles density function calculations (DFT), it is proposed that O-terminated surfaces would develop in a hypoxic environment due to the dynamic diffusion of O-v from the outer surface to the subsurface. Furthermore, in a reductive environment, H-2 facilitates the formation and diffusion of O-v while Ce-terminated surfaces develope. These results reveal dynamic atomic-scale interplay between the nanoceria surface and gas, thereby providing fundamental insights into the O-v-dependent reaction of nano-CeO2 during catalytic processes. (c) 2023 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
关键词 ：
Ceria Ceria Rare earths Rare earths Oxygen vacancy Oxygen vacancy Density function calculations Density function calculations In situ ETEM In situ ETEM Direct observation Direct observation
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| GB/T 7714 | Pang, Dawei , Li, Wei , Zhang, Ningqiang et al. Direct observation of oxygen vacancy formation and migration over ceria surface by in situ environmental transmission electron microscopy [J]. | JOURNAL OF RARE EARTHS , 2024 , 42 (4) : 676-682 . |
| MLA | Pang, Dawei et al. "Direct observation of oxygen vacancy formation and migration over ceria surface by in situ environmental transmission electron microscopy" . | JOURNAL OF RARE EARTHS 42 . 4 (2024) : 676-682 . |
| APA | Pang, Dawei , Li, Wei , Zhang, Ningqiang , He, Hong , Mao, Shengcheng , Chen, Yanhui et al. Direct observation of oxygen vacancy formation and migration over ceria surface by in situ environmental transmission electron microscopy . | JOURNAL OF RARE EARTHS , 2024 , 42 (4) , 676-682 . |
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摘要 ：
The commercialization of Ni-based catalysts in CO2 dry reforming of methane (DRM) suffers from their quick deactivation. Here, we reveal each reaction pathway for DRM based on the Ni catalyst composition and geometry under working conditions, through one working platform combining in situ high resolution Cs corrected environmental transmission electron microscopy and electron energy-loss spectroscopy coupled with mass spectroscopy. The formation of Ni3C has been found to inhibit the decomposition of CO2 and CH4, and to promote the formation of onion-like carbon to encapsulate the Ni catalysts, leading to the deactivation of the Ni-based catalysts. Designing the suitable supports or promoters to keep the Ni surface structure under Ni-NiO cycle can drive the simultaneously amorphous carbon deposition-consumption cycle and minimise the coke formation. This research is not only for developing coke resistance Ni catalysts in the DRM, but also significant for investigating many catalysis challenges both in research and engineering.
关键词 ：
Coke formation Coke formation CO2 2 dry reforming of methane CO2 2 dry reforming of methane In situ TEM In situ TEM Ni-based catalysts Ni-based catalysts
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| GB/T 7714 | Wang, Zichun , Lv, Qian , Li, Ang et al. Reveal and correlate working geometry and surface chemistry of Ni nanocatalysts in CO2 reforming of methane [J]. | MATERIALS TODAY , 2024 , 79 : 16-27 . |
| MLA | Wang, Zichun et al. "Reveal and correlate working geometry and surface chemistry of Ni nanocatalysts in CO2 reforming of methane" . | MATERIALS TODAY 79 (2024) : 16-27 . |
| APA | Wang, Zichun , Lv, Qian , Li, Ang , Wu, Ping , Wang, Lizhuo , Li, Wei et al. Reveal and correlate working geometry and surface chemistry of Ni nanocatalysts in CO2 reforming of methane . | MATERIALS TODAY , 2024 , 79 , 16-27 . |
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摘要 ：
he development of high-performance hydro-gen sensors is considered of great significance for the safety of hydrogen energy and related industries. The two-dimensional(2D) MoS(2)nanomaterials have exhibited great superiority inbuilding fast and reliable room-temperature hydrogen sensors. However, their poor sensitivity and selectivity issues still limit their wide exploitation. In this work, nano-SnO2-mod-ified MoS(2)thin films with structure-dependent n-p tunable hydrogen response behaviours were reported. Thein-situscanning Kelvin probe microscopy (SKPM) study on the hy-drogen response of the SnO2/MoS(2)systems revealed the dif-ferent reductions in the surface potential of SnO2(0.38 eV)and MoS2(0.26 eV) in a hydrogen environment, which resultsin different variations in the interface potential barrier withthe increasing surface coverage of SnO2. As a result, the con-tribution from the interface effect to the n-type hydrogen re-sponse was changed from the positive enhancement to thenegative compensation. The sensor exhibited a fast, enhanced,and selective n-type hydrogen response with the SnO(2)coveragedown to 6.4%, while a p-type sensor response was achievedwhen the SnO(2)coverage increased to 95.6%. Such structure-dependent n-p tunable hydrogen sensing behaviour can notonly be utilized for the sensitization of the sensing layers butmay also provide a simple and cost-effective way for themodulation of the response type of the sensor composed of theMoS(2)-based 2D materials.
关键词 ：
hydrogen sensor hydrogen sensor 2D materials 2D materials tin dioxide tin dioxide molybdenum disulfide molybdenum disulfide scanning Kelvin probe microscopy scanning Kelvin probe microscopy
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| GB/T 7714 | Tan, Lun , Liu, Xianzhen , Yang, Piaoyun et al. The n-p tunable room-temperature hydrogen response of SnO2-modified MoS2 thin films and its in-situ SKPM study [J]. | SCIENCE CHINA-MATERIALS , 2023 , 66 (11) : 4427-4436 . |
| MLA | Tan, Lun et al. "The n-p tunable room-temperature hydrogen response of SnO2-modified MoS2 thin films and its in-situ SKPM study" . | SCIENCE CHINA-MATERIALS 66 . 11 (2023) : 4427-4436 . |
| APA | Tan, Lun , Liu, Xianzhen , Yang, Piaoyun , Li, Wei , Yang, Weijia , Li, Ang et al. The n-p tunable room-temperature hydrogen response of SnO2-modified MoS2 thin films and its in-situ SKPM study . | SCIENCE CHINA-MATERIALS , 2023 , 66 (11) , 4427-4436 . |
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摘要 ：
The microstructure and oxidation properties from bulk material to atomic scale of NiCr alloys with different Cr contents from 10 to 50 at% were systematically studied. The oxidation mechanism in NiCr alloys with different Cr contents was analysed by in-situ environmental transmission electron microscopy. The increased porosity of the NiO/NiCr2O4 oxide layer in the 10 at% Cr-containing alloy seriously decreases its oxidation resistance, and Cr contents between 20 and 40 at% offer outstanding oxidation resistance due to the inhibited growth of NiO/ NiCr2O4 oxides. Ni-50 at%Cr alloy exhibit poor corrosion resistance due to short-circuit oxidation paths by its FCC/BCC dual-phase structure.
关键词 ：
Environmental TEM Environmental TEM In situ In situ Ni-Cr Ni-Cr Oxidation Oxidation
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| GB/T 7714 | Liu, Shanshan , Chen, Yanhui , An, Zibing et al. Microstructure and oxidation of NiCr alloys studied by analytical in situ environmental TEM [J]. | CORROSION SCIENCE , 2023 , 224 . |
| MLA | Liu, Shanshan et al. "Microstructure and oxidation of NiCr alloys studied by analytical in situ environmental TEM" . | CORROSION SCIENCE 224 (2023) . |
| APA | Liu, Shanshan , Chen, Yanhui , An, Zibing , Zhao, Junbo , Lu, Hui , Jiao, Yilin et al. Microstructure and oxidation of NiCr alloys studied by analytical in situ environmental TEM . | CORROSION SCIENCE , 2023 , 224 . |
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摘要 ：
本发明提供一种贵金属衬底的异相化单位点制备方法。在水和或溶剂中，加入具有官能团修饰的均相钨、钼金属配合物的单位点，即金属单原子或金属单一团簇，配体是可以与金属配位的含有氧/硫/氮的化合物分子，即均匀分散在溶剂中的金属氧/硫/氮化物，制成均相络合物溶液。在该溶液中，加入带有表面缺陷的衬底材料后，利用静置冷冻/加热或pH或加电压方式，将均相位点负载在衬底材料表面的缺陷或缝隙处，形成异相化制备。
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| GB/T 7714 | 王聪 , 李昂 , 冯奕博 et al. 一种贵金属衬底的异相化单位点制备方法 : CN202211447913.9[P]. | 2022-11-18 . |
| MLA | 王聪 et al. "一种贵金属衬底的异相化单位点制备方法" : CN202211447913.9. | 2022-11-18 . |
| APA | 王聪 , 李昂 , 冯奕博 , 高钰航 , 韩晓东 . 一种贵金属衬底的异相化单位点制备方法 : CN202211447913.9. | 2022-11-18 . |
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摘要 ：
一种城市固废焚烧过程主蒸汽流量实时预测方法，步骤如下：一、对城市固废焚烧过程的历史数据进行预处理，使用基于滑动窗口与相关向量机RVM结合的方法识别并删除其中的异常值，并使用时间连续的数据作为案例库；二、使用基于欧氏距离与协方差作为相似度指标的即时学习方法JITL检索数据样本，得到与待预测时刻相似度最高的n*K个案例；三、使用基于机理分析改进的支持向量机ISVM对检索出的n*K个案例建立模型，并得出目标时刻的主蒸汽流量值，最后将结果与目标时刻工况参数作为一个案例存储到案例库中；四、重复步骤二～三，直至焚烧过程结束，以实现城市固废焚烧过程主蒸汽流量实时预测。本发明使得热能转化状况得到准确检测，提高热能利用率。
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| GB/T 7714 | 严爱军 , 李昂 , 汤健 . 一种城市固废焚烧过程主蒸汽流量实时预测方法 : CN202210612435.6[P]. | 2022-05-31 . |
| MLA | 严爱军 et al. "一种城市固废焚烧过程主蒸汽流量实时预测方法" : CN202210612435.6. | 2022-05-31 . |
| APA | 严爱军 , 李昂 , 汤健 . 一种城市固废焚烧过程主蒸汽流量实时预测方法 : CN202210612435.6. | 2022-05-31 . |
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摘要 ：
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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摘要 ：
In situ environmental transmission electron microscopy has previously been applied to traditional alloys and has been verified as a powerful tool for studying oxidation mechanisms. Single-crystal Ni-based superalloys are often used for commercial turbine blades, especially 1st- to 3rd-generation superalloys. The reactivity to oxidation of the single-crystal Ni-based superalloys was the main factor in deciding their bulk oxidation resistance. An overall study on different generations of various Re-containing Ni-based superalloys was conducted in this study to compare their difference in oxidation properties using an in situ technique. Nanoscale structural and elemental distributions across the gamma/gamma ' interface were assessed on three typical 1st- to 3rd-generation superalloys via modern electron microscopy. Oxidation at the gamma/gamma ' interface was systematically analysed by an in situ oxidation process in an environmental transmission electron microscope to reveal the nanoscale oxidation mechanisms and the roles of key elements. Preferential oxidation of the gamma/gamma ' interface is revealed in oxidation mechanisms. Aggregation of Cr and Re in the gamma/gamma ' interfaces of the 0Re and 7Re alloys induced a larger lattice misfit and a corresponding stress, which prompted priority oxidation at the interface. Key factors, including alloy elements and microstructures, are extracted, and this technique is expected to be applicable to more materials.
关键词 ：
ETEM ETEM In situ In situ Oxidation Oxidation Ni-based superalloy Ni-based superalloy gamma/gamma ' Interface gamma/gamma ' Interface
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| GB/T 7714 | Chen, Yanhui , Qiao, Shihang , Zhao, Yunsong et al. In Situ Oxidation in Ni-Based Single-Crystal Superalloys with Varying Re Contents Observed by Environmental Transmission Electron Microscopy [J]. | OXIDATION OF METALS , 2022 , 98 (3-4) : 399-414 . |
| MLA | Chen, Yanhui et al. "In Situ Oxidation in Ni-Based Single-Crystal Superalloys with Varying Re Contents Observed by Environmental Transmission Electron Microscopy" . | OXIDATION OF METALS 98 . 3-4 (2022) : 399-414 . |
| APA | Chen, Yanhui , Qiao, Shihang , Zhao, Yunsong , Li, Xueqiao , Zhang, Bin , Liu, Shanshan et al. In Situ Oxidation in Ni-Based Single-Crystal Superalloys with Varying Re Contents Observed by Environmental Transmission Electron Microscopy . | OXIDATION OF METALS , 2022 , 98 (3-4) , 399-414 . |
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摘要 ：
融合卷积神经网络与VLAD的闭环检测方法
关键词 ：
词袋模型 词袋模型 特征提取 特征提取 卷积神经网络 卷积神经网络 闭环检测 闭环检测
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| GB/T 7714 | 李昂 , 阮晓钢 , 黄静 et al. 融合卷积神经网络与VLAD的闭环检测方法 [J]. | 李昂 , 2021 , 38 (1) : 135-142 . |
| MLA | 李昂 et al. "融合卷积神经网络与VLAD的闭环检测方法" . | 李昂 38 . 1 (2021) : 135-142 . |
| APA | 李昂 , 阮晓钢 , 黄静 , 朱晓庆 , 计算机应用与软件 . 融合卷积神经网络与VLAD的闭环检测方法 . | 李昂 , 2021 , 38 (1) , 135-142 . |
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