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The formation and stability of Si_(1-x)C_x alloys in Si implanted with carbon ions

Chinese Science Bulletin 2001年第3期46卷 200-204页

作者： wang yinshu, li jinmin,{2., wang yutian, sun guosheng & lin lanying1. department of Physics, beijing normal university, beijing 100875, china 2. Institute of Semiconductors, Chinese Academy of Sciences, {12. 100083, china 3. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, china department of Physics Beijing Normal University Beijing China Institute of Semiconductors Chinese Academy of Sciences Beijing China Institute of Modern Physics Chinese Academy of Sciences Lanzhou China

Si1-xCx alloys of carbon (C) concentration between 0.6%-1.0% were grown in Si by ion implantation and high temperature annealing. The formation of Si1-xCx alloys under different ion doses and their stability during annealing were studied. If the implanted dose was less than that for amorphizing Si crystals, the implanted C atoms would like to combine with defects produced during implantation and it was difficult to form Si1-xCx alloys after being annealed at 850℃. With the increment of implanted C ion doses, the lattice damage increased and it was easier to form Si1-xCx alloys. But the lattice strain would become saturate and only part of implanted carbon atoms would occupy the substitutional positions to form Si1-xCx alloys as the implanted carbon dose increased to a certain degree. Once Si1-xCx alloys were formed, they were stable at 950℃, but part of their strain would release as the annealing temperature increased to 1 000℃. Stability of the alloys became worse with the increment of carbon

关键词： ion implantation Si1-xCx alloys stability of Si1-xCx alloys.

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Biomarkers of aging

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Science china(life Sciences) 2023年第5期66卷 893-1066页

作者： Aging Biomarker Consortium Hainan Bao Jiani Cao Mengting Chen Min Chen Wei Chen Xiao Chen Yanhao Chen Yu Chen yutian Chen Zhiyang Chen Jagadish K Chhetri Yingjie Ding Junlin Feng Jun Guo Mengmeng Guo Chuting He Yujuan Jia Haiping Jiang Ying {2.g Dingfeng li Jiaming li {2.gyi li Qinhao liang Rui liang Feng liu Xiaoqian liu Zuojun liu Oscar Junhong Luo Jianwei Lv {2.gyi Ma Kehang Mao Jiawei Nie Xinhua Qiao Xinpei sun Xiaoqiang Tang Jianfang wang Qiaoran wang Siyuan wang Xuan wang Yaning wang Yuhan wang Rimo Wu Kai Xia Fu-Hui Xiao lingyan Xu Yingying Xu Haoteng Yan liang Yang Ruici Yang Yuanxin Yang Yilin Ying Le Zhang Weiwei Zhang Wenwan Zhang Xing Zhang Zhuo Zhang Min Zhou Rui Zhou Qingchen Zhu Zhengmao Zhu Feng Cao Zhongwei Cao Piu Chan Chang Chen Guobing Chen Hou-Zao Chen Jun Chen Weimin Ci Bi-Sen Ding Qiurong Ding Feng Gao {2.g-Dong JHan Kai Huang Zhenyu Ju Qing-Peng Kong Ji li Jian li Xin li Baohua liu Feng liu lin liu Qiang liu Qiang liu Xingguo liu Yong liu Xianghang Luo Shuai Ma Xinran Ma Zhiyong Mao {2.g Nie Yao{2. Peng {2.g Qu Jie Ren Ruibao Ren Moshi Song Zhou Songyang Yi Eve sun Yu sun Mei Tian Shusen wang Si wang Xia wang Xiaoning wang Yan-Jiang wang yunfang wang Catherine CL Wong Andy Peng Xiang Yichuan Xiao Zhengwei Xie Daichao Xu {2.g Ye Rui Yue Cuntai Zhang Hongbo Zhang liang Zhang Weiqi Zhang Yong Zhang Yun-Wu Zhang Zhuohua Zhang Tongbiao Zhao Yuzheng Zhao Dahai Zhu Weiguo Zou Gang Pei Guang-Hui liu Aging Biomarker Consortium(ABC) Beijing 100101China CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijing 100101China State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China department of Dermatology Xiangya HospitalCentral South UniversityChangsha 410008China Hunan Key Laboratory of Aging Biology Xiangya HospitalCentral South UniversityChangsha 410008China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008China Clinic Center of Human Gene Research Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Hubei Clinical Research Center of Metabolic and Cardiovascular Disease Huazhong University of Science and TechnologyWuhan 430022China Hubei Key Laboratory of Metabolic Abnormalities and Vascular Aging Huazhong University of Science and TechnologyWuhan 430022China Stem Cell Translational Research Center Tongji HospitalTongji University School of MedicineShanghai 200065China department of Nuclear Medicine Daping HospitalThird Military Medical UniversityChongqing 400042China CAS Key Laboratory of Nutrition Metabolism and Food SafetyShanghai Institute of Nutrition and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China Shanghai Key Laboratory of Maternal Fetal Medicine Clinical and Translational Research Center of Shanghai First Maternity and Infant HospitalFrontier Science Center for Stem Cell ResearchShanghai Key Laboratory of Signaling and Disease ResearchSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China The department of Endovascular Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Key Laboratory of Regenerative Medicine of Ministry of Education Institute of Ageing and Regenerative MedicineJ

Aging biomarkers are a combination of biological parameters to(i)assess age-related changes,(ii)track the physiological aging process,and(iii)predict the transition into a pathological *** a broad spectrum of aging biomarkers has been developed,their potential uses and limitations remain poorly *** immediate goal of biomarkers is to help us answer the following three fundamental questions in aging research:How old are we?Why do we get old?And how can we age slower?This review aims to address this ***,we summarize our current knowledge of biomarkers developed for cellular,organ,and organismal levels of aging,comprising six pillars:physiological characteristics,medical imaging,histological features,cellular alterations,molecular changes,and secretory *** fulfill all these requisites,we propose that aging biomarkers should qualify for being specific,systemic,and c{2.ically relevant.

关键词： aging senescence biomarker clock

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新时期粤港澳大湾区的创新发展之路

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热带地理 2023年第8期43卷 1453-1478页

作者：张虹鸥林初昇何深静黄耿志叶玉瑶刘承良罗彦杨宇刘合林潘峰华朱晟君李裕瑞胡志丁杨振山周霞吴旗韬杨忍孙伟马海涛梁育填王丰龙安宁袁振杰郭炎席广亮胡晓辉林强刘逸黄洁广东省科学院广州地理研究所广州510070 香港大学地理系中国香港999077 香港大学城市规划及设计系中国香港999077 中山大学地理科学与规划学院广州510275 中山大学旅游学院广州510275 华东师范大学城市与区域科学学院上海200062 中国城市规划设计研究院中部分院武汉430061 中国科学院地理科学与资源研究所北京100101 华中科技大学建筑与城市规划学院武汉430074 北京师范大学地理科学学部北京100875 北京大学城市与环境学院北京100871 中国科学院南京地理与湖泊研究所南京210008 华南师范大学地理科学学院广州510631 广州大学地理科学与遥感学院广州510006 武汉大学城市设计学院武汉430070 南京大学建筑与城市规划学院南京210093 南京师范大学地理科学学院南京210023 深圳市规划国土发展研究中心深圳518040

面向新的国内外形势下粤港澳大湾区发展问题,从经济、社会、文化、制度等多个维度探讨了大湾区创新发展的内容、挑战和路径。文章认为粤港澳大湾区的创新发展需要加强科技和产业创新能力,提高应对外部冲击的区域韧性,增强区域内部要素... 详细信息

面向新的国内外形势下粤港澳大湾区发展问题,从经济、社会、文化、制度等多个维度探讨了大湾区创新发展的内容、挑战和路径。文章认为粤港澳大湾区的创新发展需要加强科技和产业创新能力,提高应对外部冲击的区域韧性,增强区域内部要素的流动性,促进民生福祉水平提升,提高空间治理的能力,促进城乡融合发展,优化区域生态安全格局。需要从系统和联系的视角思考大湾区的创新发展,不仅寻求各个发展领域的革新,并且要促进各领域之间的耦合协调,使区域获得能不断突破瓶颈、消解外部冲击、解锁新发展路径的能动性。呼吁加强跨领域跨学科的交叉合作研究,为推动实现粤港澳大湾区的发展目标贡献地理学力量。

关键词：粤港澳大湾区珠三角区域发展创新空间治理乡村振兴基础设施

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