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Design strategies of Pd-based electrocatalysts for efficient oxygen reduction

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Rare Metals 2023年第6期42卷 1778-1799页

作者： Chun-Jie Li guang-cun shan Chun-Xian Guo Ru-guang Ma School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhou215009China School of Instrumentation Science and Opto-electronics Engineering Beihang UniversityBeijing100083China

Oxygen reduction reaction(ORR) occurs at the cathode of fuel cells and metal-air batteries,but usually suffers from sluggish *** solve this issue,efficient electrocatalysts are highly ***(Pd)-based nanomaterials,as the most promising substitute of platinum(Pt),exhibit superior activity and stability in ORR *** delicate regulation of the structure and/or composition shows great potential in improving the electrocatalytic ORR performance of Pd-based *** this review,we retrospect the recent advance of Pdbased ORR electrocatalysts,and analyses the relationship between nanostructure and catalytic *** start with the ORR mechanism and indicators of ORR performance in both alkaline and acidic media,followed by the synthetic methods for Pd-based ***,we emphasize the design strategies of efficient Pd-based ORR catalysts from the perspective of composition,crystal phase,morphology,and support *** but not least,we conclude with possible opportunities and outlook on Pd-based nanomaterials toward ORR.

关键词： Oxygen reduction reaction(ORR) Palladium(Pd) Electrocatalyst Overpotential Reaction kinetics

Theoretical study of photon emission from single quantum dot emitter coupled to surface plasmons

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Frontiers of physics 2011年第3期6卷 313-319页

作者： guang-cun shan Shu-ying BAO Kang ZHANG Wei HUANG Institute of Advanced Materials （IAM） Nanjing University of Posts and Telecommunications Nanjing 210003 China Department of Physics and Materials Science City University of Hong Kong Kowloon Hong Kong China Department of Physics Fudan University Shanghai 200433 China School of Information and Electronics Beijing Institute of Technology Beijing 500081 China

Motivated by the recent pioneering advances on nanoscale plasmonics and also nanophotonics tech- nology based on the surface plasmons （SPs）, in this work, we give a master equation model in the Lindblad form and investigate the quantum optical properties of single quantum dot （QD） emitter coupled to the SPs of a metallic nanowire. Our main results demonstrate the QD luminescence results of photon emission show three distinctive regimes depending on the distance between QD and metallic nanowire, which elucidates a crossover passing from being metallic dissipative for much smaller emitter-nanowire distances to surface plasmon （SP） emission for larger separations at the vicinity of plasmonic metallic nanowire. Besides, our results also indicate that, for both the resonant case and the detuning case, through measuring QD emitter luminescence spectra and second-order correlation functions, the information about the QD emitter coupling to the SPs of the dissipative metallic nanowire can be extracted. This theoretical study will serve as an introduction to un- derstanding the nanoplasmonic imaging spectroscopy and pave a new way to realize the quantum information devices.

关键词： quantum plasmonics quantum optics metallic nanowire surface plasmon (SP) quan-tum dot

Steady-state property and dynamics in graphene-nanoribbon- array lasers

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Frontiers in Biology 2012年第5期7卷 527-532页

作者： Xing-Hai Zhao guang-cun shan Chan-Hung Shek Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621900China Department of Physics and Materials Science City University of Hong KongHong Kong SARChina

In this work, we present a schematic configuration and device model for a graphene-nanoribbon （GNR）-array-based nanolaser, which consists of a three-variable rate equations that takes into account carrier capture and Pauli blocking in semiconductor GNR-array lasers to analyze the steady- state properties and dynamics in terms of the role of the capture rate and the gain coefficient in GNR array nanolasers. Furthermore, our GNR-array nanolaser device model can be determined as two distinct two-variable reductions of the rate equations in the limit of large capture rates, depending on their relative values. The first case leads to the rate equations for quantum well lasers, exhibiting relaxation oscillations dynamics. The second case corresponds to GNRs nearly saturated by the carriers and is characterized by the absence of relaxation oscillations. Our results here demonstrated that GNR-array as gain material embedded into a high finesse microcavity can serve as an ultralow lasing threshold nanolaser with promising applications ranging widely from optical fiber communi- cation with increasing data processing speed to digital optical recording and biology spectroscopy.

关键词： graphene nanoribbon graphene nanoribbon laser laser theory laser model

Graphene based functional devices: A short review

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Frontiers of physics 2019年第1期14卷 23-42页

作者： Rong Wang Xin-Gang Ren Ze Yan Li-Jun Jiang Wei E. I. Sha guang-cun shan Department of Electrical and Electronic Engineering The University of Hong Kong Pokfulam Road Hong Kong China Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei 230039 China School of Instrumentation Science & Opto-electronics Engineering Beihang University Beijing 100191 China Key Laboratory of Micro-nano Electronic Devices and Smart Systems of Zhejiang Province College of Information Science & Electronic Engineering Zhejiang University Hangzhou 310027 China California NanoSystem Institute and Department of Chemistry & Biochemistry University of California Los Angeles CA 90095 USA

Graphene is an ideal 2D material system bridging electronic and photonic devices. It also breaks the fundamental speed and size limits by electronics and photonics, respectively. Graphene offers multiple functions of signal transmission, emission, modulation, and detection in a broad band, high speed, compact size, and low loss. Here, we have a brief view of graphene based functional devices at microwave, terahertz, and optical frequencies. Their fundamental physics and computational models were discussed as well.

关键词： graphene terahertz antenna microwave

基于领域知识辅助的机器学习方法对软磁金属玻璃性能的预测

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Transactions of Nonferrous Metals Society of China 2023年第1期33卷 209-219页

作者：李鑫单光存赵鸿滨石燦鴻北京航空航天大学仪器科学与光电工程学院北京100191 香港城市大学材料科学与工程系香港特别行政区有研科技集团有限公司智能传感功能材料国家重点实验室北京100088

提出一种领域知识辅助的机器学习方法,实现对软磁金属玻璃饱和磁化强度(B_(s))和临界尺寸(D_(max))的预测。基于公开的实验数据,建立软磁合金数据库。提出一个通用的特征空间,适用于面向不同预测任务的机器学习模型训练。结果表明,机器... 详细信息

提出一种领域知识辅助的机器学习方法,实现对软磁金属玻璃饱和磁化强度(B_(s))和临界尺寸(D_(max))的预测。基于公开的实验数据,建立软磁合金数据库。提出一个通用的特征空间,适用于面向不同预测任务的机器学习模型训练。结果表明,机器学习模型的预测能力比基于物理知识的估计方法精度更高。此外,领域知识辅助的特征选择可在有效减少特征数量的同时,不显著降低模型的预测精度。最后,对软磁金属玻璃临界尺寸的二分类预测进行讨论。

关键词：金属玻璃软磁性玻璃形成能力机器学习材料描述符

P2Y1 receptor in Alzheimer’s disease

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Neural Regeneration Research 2025年第2期20卷 440-453页

作者： shan Luo Yifei Wang Tatsuhiro Hisatsune Department of Integrated Biosciences The University of TokyoKashiwaJapan

Alzheimer’s disease is the most frequent form of dementia characterized by the deposition of amyloid-beta plaques and neurofibrillary tangles consisting of hyperphosphorylated *** amyloid-beta plaques has been a primary direction for developing Alzheimer’s disease treatments in the last ***,existing drugs targeting amyloid-beta plaques have not fully yielded the expected results in the clinic,necessitating the exploration of alternative therapeutic *** evidence unravels that astrocyte morphology and function alter in the brain of Alzheimer’s disease patients,with dysregulated astrocytic purinergic receptors,particularly the P2Y1 receptor,all of which constitute the pathophysiology of Alzheimer’s *** receptors are not only crucial for maintaining normal astrocyte function but are also highly implicated in neuroinflammation in Alzheimer’s *** review delves into recent insights into the association between P2Y1 receptor and Alzheimer’s disease to underscore the potential neuroprotective role of P2Y1 receptor in Alzheimer’s disease by mitigating neuroinflammation,thus offering promising avenues for developing drugs for Alzheimer’s disease and potentially contributing to the development of more effective treatments.

关键词： astrocytes neuroinflammation P2Y1 receptor purinergic receptor

Successful emergency surgical intervention in acute non-STsegment elevation myocardial infarction with rupture:A case report

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World Journal of Clinical Cases 2025年第4期13卷 41-47页

作者： Xing-Po Li Zi-shan Wang Hong-Xia Yu shan-shan Wang Department of Cardiovascular Medicine Huantai County Hospital of Traditional Chinese MedicineZibo 256400Shandong ProvinceChina Department of Cardiovascular Medicine Zibo Hospital of Integrated Traditional Chinese and Western MedicineZibo 255500Shandong ProvinceChina

BACKGROUND The incidence of acute myocardial infarction(AMI)is rising,with cardiac rupture accounting for approximately 2%of deaths in patients with acute ST-segment elevation myocardial infarction(STEMI).Ventricular free wall rupture(FWR)occurs in approximately 2%of AMI patients and is notably rare in patients with *** of cardiac rupture include left ventricular FWR,ventricular septal rupture,and papillary muscle *** FWR usually leads to acute cardiac tamponade or electromechanical dissociation,where standard resuscitation efforts may not be *** septal rupture and papillary muscle rupture often result in refractory heart failure,with mortality rates over 50%,even with surgical or percutaneous repair *** SUMMARY We present a rare case of an acute non-STEMI patient who suffered sudden FWR causing cardiac tamponade and loss of consciousness immediate before undergoing coronary *** resuscitation and emergency open-heart repair along with coronary artery bypass grafting resulted in successful patient *** This case emphasizes the risks of AMI complications,shares a successful treatment scenario,and discusses measures to prevent such complications.

关键词： Acute non-ST segment elevation myocardial infarction Cardiac rupture Acute myocardial infarction Free wall rupture Case report

Synthesis and characterization of poly(methyl methacrylate-co-polyhedral oligomeric silsesquioxane)hybrid nanocomposites

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Chinese Chemical Letters 2007年第8期18卷 960-962页

作者： Ben Hong Yang Hong Yao Xu cun Li shan Yi guang School of Chemistry and Chemical Engineering Anhui University Hefei 230039 China College of Material Science and Engineering ＆ State Key Laboratory of Chemical Fibers and Polymeric Materials Donghua University Shanghai 200051 China Department of Chemical and Material Engineering Hefei University Hefei 230022 China

A novel poly（methyl methacrylate-co-polyhedral oligomeric silsesquioxane） hybrid nanocomposite was synthesized by free radical polymerization and characterized by 1H NMR, 29Si NMR, and TGA technologies. Compared wit... 详细信息

关键词： Poly(methyl methacrylate) Polyhedral silsesquioxane Nanoeomposite

Acute and chronic excitotoxicity in ischemic stroke and late-onset Alzheimer's disease

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Neural Regeneration Research 2025年第7期20卷 1981-1988页

作者： shan Ping Yu Emily Choi Michael QJiang Ling Wei Department of Anesthesiology Emory University School of MedicineAtlantaGAUSA Center for Visual and Neurocognitive Rehabilitation Atlanta Veterans Affairs Medical CenterDecaturGAUSA

Stroke and Alzheimer's disease are common neurological disorders and often occur in the same *** comorbidity of the two neurological disorders represents a grave health threat to older *** review presents a brief background of the development of novel concepts and their clinical *** activity of glutamatergic N-methyl-D-aspartate receptors and N-methyl-D-aspartate receptor-mediated Ca^(2+)influx is critical for neuronal *** ischemic insult induces prompt and excessive glutamate release and drastic increases of intracellular Ca^(2+)mainly via N-methyl-D-aspartate receptors,particularly of those at the extrasynaptic *** Ca^(2+)-evoked neuronal cell death in the ischemic core is dominated by necrosis within a few hours and days known as acute ***,mild but sustained Ca^(2+)increases under neurodegenerative conditions such as in the distant penumbra of the ischemic brain and early stages of Alzheimer's disease are not immediately toxic,but gradually set off deteriorating Ca^(2+)-dependent signals and neuronal cell loss mostly because of activation of programmed cell death *** on the Ca^(2+)hypothesis of Alzheimer's disease and recent advances,this Ca^(2+)-activated“silent”degenerative excitotoxicity evolves from years to decades and is recognized as a unique slow and chronic *** N-methyl-D-aspartate receptor subunit GluN3A,primarily at the extrasynaptic site,serves as a gatekeeper for the N-methyl-D-aspartate receptor activity and is neuroprotective against both acute and chronic *** stroke and Alzheimer's disease,therefore,share an N-methyl-D-aspartate receptor-and Ca^(2+)-mediated mechanism,although with much different time *** is thus proposed that early interventions to control Ca^(2+)homeostasis at the preclinical stage are pivotal for individuals who are susceptible to sporadic late-onset Alzheimer's disease and Alzheimer's disease-related

关键词： Ca^(2+)hypothesis cognitive deficits hyperactivity late-onset Alzheimer's disease neurodegeneration N-methyl-D-aspartate receptors N-methyl-D-aspartate receptor subunits pathogenesis preventive treatment