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Exploring centimeter-sized crystals of bismuth-iodide perovskite toward highly sensitive X-ray detection

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Chinese Chemical Letters 2024年第6期35卷 185-188页

作者： Xin Dong Jing Liang Zhijin Xu Huajie Wu Lei Wang shihai you Junhua Luo Lina Li College of Chemistry Fuzhou UniversityFuzhou 350116China State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Lead-halide perovskites exhibit outstanding performance in X-ray detection due to their intrinsic features such as high charge carrier mobility,large atomic number,and long carrier lifetime,but the toxicity of lead is regarded as the major factor hindering their ***,we introduce organic molecule(R)-(-)-2-methylpiperazine(R-MPz)into the bismuth-based structure to synthesize lead-free(R)-(H_(2)MPz)BiI_(5)(R-MBI).The high-quality centimeter-sized single crystals have been obtained,which show a low dark current and superior environmental ***,the single-crystal device of R-MBI exhibits a highμτproduct up to 1.88×10^(-4)cm^(2)/V and a low trap density of 1.21×10^(10)cm^(-3).Further,the detector displays excellent detection sensitivity of 263.58μC Gy_(air)^(-1)cm^(-2)and a favorable low detection limit of 4.35μGyair/s,both of which meet the requirement for medical *** findings shed light on the exploration of innovative bismuth-based hybrid perovskites for high-performance X-ray detection.

关键词： Perovskite Lead-free Bismuth-based X-ray detection Sensitivity

无机填料改性有机硅胶黏剂高温黏结性能及机理分析

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硅酸盐学报 2014年第1期42卷 70-74页

作者：游世海齐士成李友芬尹晓飞北京化工大学材料科学与工程学院材料电化学过程与技术北京市重点实验室北京100029

以有机硅树脂为基体,以金属Al、B4C和气相法制备的SiO2为无机填料制备了耐高温胶黏剂。采用X射线衍射仪、扫描电子显微镜、能谱分析仪和热重分析分别研究了胶黏剂的相组成、微观结构及热稳定性,通过抗压剪切强度测试陶瓷黏结性能。结果... 详细信息

以有机硅树脂为基体,以金属Al、B4C和气相法制备的SiO2为无机填料制备了耐高温胶黏剂。采用X射线衍射仪、扫描电子显微镜、能谱分析仪和热重分析分别研究了胶黏剂的相组成、微观结构及热稳定性,通过抗压剪切强度测试陶瓷黏结性能。结果表明:胶黏剂经1 150℃热处理后的质量增加了38%;当用于刚玉陶瓷黏接时,黏接试样200℃固化后的黏接强度为9.00MPa,经1 000℃热处理后提高到45.60MPa。黏接机理分析表明,当温度小于600℃,黏接强度来源于胶黏剂中的有机硅树脂;超过600℃,金属Al粉和B4C氧化并与有机树脂裂解产物发生反应,生成xSiOm Cn·yB2O3、2Al2O3·B2O3和9Al2O3·2B2O3等玻璃/陶瓷相,氧化伴随着体积膨胀可有效抑制有机基体高温裂解导致的体积收缩,并愈合裂解带来的微观缺陷。此外黏接界面发生元素互扩散层,引入化学键的作用,进一步提高了胶黏剂的高温黏接强度。

关键词：耐高温胶黏剂有机硅树脂无机填料铝黏结性能

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火电厂烟气脱硫中CEMS的投用

贵州电力技术 2009年第4期12卷 29-30页

作者：游世海贵阳发电厂 550003

本文主要介绍火电厂烟气脱硫在线监测装置CEMS系统目前存在的弊端以及环保及相关部门对在线监测系统一些具体的考核方法。

关键词：脱硫 CEMS系统问题探讨

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一个基于事件模型UIMS的设计和实现

计算机辅助设计与图形学学报 1989年第1期1卷 32-36页

作者：董士海游以佳陈晓艳北京大学计算机科学系

本文论述了事件模型的基本思想和特点,并在UNIX系统上实现了一个基于事件模型的UIMS(用户界面管理系统)。论文给出了系统的数据流图、系统结构及交互技术库的函数。初步结果表明,采用事件模型的UIMS,可用形式的专用语言描述事件,并能实... 详细信息

本文论述了事件模型的基本思想和特点,并在UNIX系统上实现了一个基于事件模型的UIMS(用户界面管理系统)。论文给出了系统的数据流图、系统结构及交互技术库的函数。初步结果表明,采用事件模型的UIMS,可用形式的专用语言描述事件,并能实现并发的特点,是一个有前途的实现用户对话的模型。

关键词：用户介面管理系统计算机图形学

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粉煤灰合成钙长石多孔陶瓷的结构与性能

硅酸盐学报 2016年第12期44卷 1718-1723页

作者：游世海郑化安付东升吕晓丽苏艳敏李克伦李欣陕西煤业化工技术研究院国家能源煤炭分质清洁转化重点实验室西安710065

以高钙粉煤灰为主要原料,通过添加造孔剂,采用高温固相烧结法合成出钙长石多孔陶瓷。考察了烧成制度和造孔剂含量对多孔陶瓷显气孔率及抗折强度的影响。利用X射线衍射仪和扫描电子显微镜表征了多孔陶瓷的物相组成和微观结构。结果表明:... 详细信息

以高钙粉煤灰为主要原料,通过添加造孔剂,采用高温固相烧结法合成出钙长石多孔陶瓷。考察了烧成制度和造孔剂含量对多孔陶瓷显气孔率及抗折强度的影响。利用X射线衍射仪和扫描电子显微镜表征了多孔陶瓷的物相组成和微观结构。结果表明:提高烧成温度和延长保温时间会降低多孔陶瓷的显气孔率,增强其抗折强度;增加造孔剂含量会导致显气孔率升高,但过量添加反而造成显气孔率下降。当烧成温度为1 140℃、保温时间为90 min、造孔剂含量为35%(质量分数)时,多孔陶瓷具有较高的显气孔率和抗折强度(分别达到58.05%和9.41 MPa)。多孔陶瓷的主晶相为钙长石,孔径分布为数微米到150μm。

关键词：粉煤灰多孔陶瓷钙长石显气孔率抗折强度

Glycolytic dysregulation in Alzheimer's disease:unveiling new avenues for understanding pathogenesis and improving therapy

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Neural Regeneration Research 2025年第8期20卷 2264-2278页

作者： you Wu Lijie Yang Wanrong Jiang Xinyuan Zhang Zhaohui Yao Department of Geriatrics Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

Alzheimer's disease poses a significant global health challenge owing to the progressive cognitive decline of patients and absence of curative *** current therapeutic strategies,primarily based on cholinesterase inhibitors and N-methyl-Daspartate receptor antagonists,offer limited symptomatic relief without halting disease progression,highlighting an urgent need for novel research directions that address the key mechanisms underlying Alzheimer's *** studies have provided insights into the critical role of glycolysis,a fundamental energy metabolism pathway in the brain,in the pathogenesis of Alzheimer's *** in glycolytic processes within neurons and glial cells,including microglia,astrocytes,and oligodendrocytes,have been identified as significant contributors to the pathological landscape of Alzheimer's *** changes impact neuronal health and function,thus offering promising targets for therapeutic *** purpose of this review is to consolidate current knowledge on the modifications in glycolysis associated with Alzheimer's disease and explore the mechanisms by which these abnormalities contribute to disease onset and *** focus on the pathways through which glycolytic dysfunction influences Alzheimer's disease pathology should provide insights into potential therapeutic targets and strategies that pave the way for groundbreaking treatments,emphasizing the importance of understanding metabolic processes in the quest for clarification and management of Alzheimer's disease.

关键词： Alzheimer’s disease glial cells glycolysis neuronal metabolism pathogenesis therapeutic targets

Visualizing traumatic brain injury:ocular clues for diagnosis and assessment

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Neural Regeneration Research 2025年第5期20卷 1399-1400页

作者： Morteza Abyadeh Vivek Gupta Yuyi you Joao A.Paulo Mehdi Mirzaei ProGene Technologies Pty Ltd SydneyNSWAustralia Department of Clinical Medicine Faculty of MedicineHealth and Human SciencesMacquarie Medical SchoolMacquarie UniversityMacquarie ParkNorth RydeSydneyNSWAustralia Department of Cell Biology Harvard Medical SchoolBostonMAUSA

Traumatic brain injury (TBI) is defined as damage to the brain resulting from an external sudden physical force or shock to the *** is considered a silent public health epidemic causing significant death and disability *** were 64,000 TBI related deaths reported in the USA in 2020,with about US$76 billion in direct and indirect medical costs annually.

关键词： diagnosis ocular injury

Bidirectional regulation of the brain-gut-microbiota axis following traumatic brain injury

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Neural Regeneration Research 2025年第8期20卷 2153-2168页

作者： Xinyu you Lin Niu Jiafeng Fu Shining Ge Jiangwei Shi Yanjun Zhang Pengwei Zhuang National Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjinChina Haihe Laboratory of Modern Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjinChina First Teaching Hospital of Tianjin University of Traditional Chinese Medicine TianjinChina National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion TianjinChina

Traumatic brain injury is a prevalent disorder of the central nervous *** addition to primary brain parenchymal damage,the enduring biological consequences of traumatic brain injury pose long-term risks for patients with traumatic brain injury;however,the underlying pathogenesis remains unclear,and effective intervention methods are *** dysfunction is a significant consequence of traumatic brain *** the most densely innervated peripheral tissue in the body,the gut possesses multiple pathways for the establishment of a bidirectional“brain-gut axis”with the central nervous *** gut harbors a vast microbial community,and alterations of the gut niche contribute to the progression of traumatic brain injury and its unfavorable prognosis through neuronal,hormonal,and immune pathways.A comprehensive understanding of microbiota-mediated peripheral neuroimmunomodulation mechanisms is needed to enhance treatment strategies for traumatic brain injury and its associated *** comprehensively reviewed alterations in the gut microecological environment following traumatic brain injury,with a specific focus on the complex biological processes of peripheral nerves,immunity,and microbes triggered by traumatic brain injury,encompassing autonomic dysfunction,neuroendocrine disturbances,peripheral immunosuppression,increased intestinal barrier permeability,compromised responses of sensory nerves to microorganisms,and potential effector nuclei in the central nervous system influenced by gut ***,we reviewed the mechanisms underlying secondary biological injury and the dynamic pathological responses that occur following injury to enhance our current understanding of how peripheral pathways impact the outcome of patients with traumatic brain *** review aimed to propose a conceptual model for future risk assessment of central nervous system-related diseases while elucidating novel insights into the bidirectional effec

关键词： traumatic brain injury brain-gut-microbiome axis gut microbiota neuroimmune immunosuppression host defense vagal afferents bacterial infection dorsal root ganglia nociception neural circuitry

Unraveling post-growth mechanisms of monolayer CsPbBr3 nanocubes:Laser-enhanced transformations and cathodoluminescence-electron microscopy correlations

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Journal of Energy Chemistry 2025年第1期100卷 146-156页

作者： Mingxing Li Xiaoge Wang Xiaofan Cao Zhiqun He Chunjun Liang Mingxing Chen Jing Ju Fangtian you Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic Technology Beijing Jiaotong University Beijing National Laboratory for Molecular Sciences (BNLMS) College of Chemistry and Molecular Engineering Peking University

Lead-halide perovskite nanoparticles（LHP NPs） are highly promising materials for next-generation displays and solid-state lighting due to their exceptional optical properties. However, their inherent instability presents a significant challenge. Recent advances have demonstrated that optoelectronic devices based on monolayer nanoparticle films exhibit both high luminescence efficiency and long-term *** research demonstrates that mobility limitations and anisotropic alignments in CsPbBr3nanocube monolayer films are key to their stabilization, hindering spontaneous growth through face-to-face fusion and resulting in the formation of connecting necks in a diagonal direction. Introducing laser irradiation confirmed this by significantly accelerating nanocubes growth, increasing mobility, and enhancing local structural ordering, leading to larger and more regularly shaped nanosheets. Fourier transform infrared spectroscopy and energy dispersive spectroscopy line-scan analyses indicated that laser irradiation did not disrupt the ligand structure. Transmission electron microscopy and correlative cathodoluminescence electron microscopy revealed the effects of post-growth and heterogeneous structures, including enhanced luminescence and inhomogeneous intensity in the nanosheets. These findings deepen the understanding of the post-growth mechanism of monolayer nanoparticles and the structure-emission correlation and highlight the unique role of laser irradiation in directing the formation of well-defined and regular nanostructures.

关键词： Energy dispersive spectroscopy