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STCF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov x.C.Ai L.P.An R.Aliberti Q.An x.z.Bai y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov d.Bodrov A.Bogomyagkov A.Bondar I.Boyko z.H.Bu F.M.Cai H.Cai J.J.Cao Q.H.Cao x.Cao z.Cao Q.Chang K.T.Chao d.y.Chen H.Chen H.x.Chen J.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen w.Chen x.Chen x.F.Chen x.R.Chen y.Chen y.Q.Chen H.y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.dai L.y.dai x.C.dai d.dedovich A.denig I.denisenko J.M.dias d.z.ding L.y.dong w.H.dong V.druzhinin d.S.du y.J.du z.G.du L.M.duan d.Epifanov y.L.Fan S.S.Fang z.J.Fang G.Fedotovich C.Q.Feng x.Feng y.T.Feng J.L.Fu J.Gao y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou w.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo y.P.Guo z.H.Guo A.Guskov K.L.Han L.Han M.Han x.Q.Hao J.B.He S.Q.He x.G.He y.L.He z.B.He z.x.Heng B.L.Hou T.J.Hou y.R.Hou C.y.Hu H.M.Hu K.Hu R.J.Hu w.H.Hu x.H.Hu y.C.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.y.Huang w.Q.Huang x.T.Huang x.J.Huang y.B.Huang y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia z.K.Jia H.B.jiang J.jiang S.z.jiang J.B.Jiao z.Jiao H.J.Jing x.L.Kang x.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin y.Lei E.Levichev C.H.li C.li d.y.li F.li G.li G.li H.B.li H.li H.N.li H.J.li H.L.li J.M.li J.li L.li L.li L.y.li N.li P.R.li R.H.li S.li T.li w.J.li x.li x.H.li x.Q.li x.H.li y.li y.y.li z.J.li H.liang J.H.liang y.T.liang G.R.liao L.z.liao y.liao C.x.lin d.x.lin x.S.lin B.J.liu C.w.liu d.liu F.liu G.M.liu H.B.liu J.liu J.J.liu J.B.liu K.liu K.y.liu K.liu L.liu Q.liu S.B.liu T.liu x.liu y.w.liu y.liu y.L.liu z.Q.liu z.y.liu z.w.liu I.Logashenko y.Long C.G.Lu J.x.Lu N.Lu Q.F.Lü y.Lu y.Lu z.Lu P.Lukin F.J.Luo T.Luo x.F.Luo y.H.Luo H.J.Lyu x.R.Lyu J.P.Ma P.Ma y.Ma y.M.Ma F.Maas S.Malde d.Matvienko z.x.Meng R.Mitchell A.Nefediev y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova x.Pan y.Pan E.Passemar y.P.Pei H.P.Peng L.Peng x.y.Peng x.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi y.Q.Qi w.B.Qian y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin x.S.Qin T.L.Qiu J.Rademacker C.F.Redmer H.y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of Geosciences Wuhan 430074China China University of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in China is under development with an extensive R&d *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&d and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

Amplitude analysis of the decays d^(0)→π^(+)π^(−)π^(+)π^(−)and d^(0)→π^(+)π^(−)π^(0)π^(0)

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Chinese Physics C 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis x.C.Ai R.Aliberti A.Amoroso Q.An y.Bai O.Bakina I.Balossino y.Ban H.-R.Bao V.Batozskaya K.Begzsuren N.Berger M.Berlowski M.Bertani d.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai x.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang w.L.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen M.L.Chen S.J.Chen S.L.Chen S.M.Chen T.Chen x.R.Chen x.T.Chen y.B.Chen y.Q.Chen z.J.Chen z.y.Chen S.K.Choi x.Chu G.Cibinetto F.Cossio J.J.Cui H.L.dai J.P.dai A.dbeyssi R.E.de Boer d.dedovich C.Q.deng z.y.deng A.denig I.denysenko M.destefanis F.de Mori B.Fang S.S.Fang w.x.Fang y.Fang y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng y.T.Feng K.Fischer M.Fritsch C.d.Fu J.L.Fu y.w.Fu H.Gao y.N.Gao yang Gao S.Garbolino I.Garzia P.T.Ge z.w.Ge C.Geng E.M.Gersabeck B.ding x.x.ding y.ding y.ding J.dong L.y.dong M.y.dong x.dong M.C.du S.x.du z.H.duan P.Egorov y.H.Fan J.Fang JA.Gilman K.Goetzen L.Gong w.x.Gong w.Gradl S.Gramigna M.Greco M.H.Gu y.T.Gu C.y.Guan z.L.Guan A.Q.Guo L.B.Guo M.J.Guo R.P.Guo y.P.Guo A.Guskov J.Gutierrez K.L.Han T.T.Han x.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz y.K.Heng C.Herold T.Holtmann P.C.Hong G.y.Hou x.T.Hou y.R.Hou z.L.Hou B.y.Hu H.M.Hu J.F.Hu T.Hu y.Hu G.S.Huang K.x.Huang L.Q.Huang x.T.Huang y.P.Huang T.Hussain F.H\"olzken N.H\"usken N.in der wiesche M.Irshad J.Jackson S.Janchiv J.H.Jeong Q.Ji Q.P.Ji w.Ji x.B.Ji x.L.Ji y.y.Ji x.Q.Jia z.K.Jia d.jiang H.B.jiang P.C.jiang S.S.jiang T.J.jiang x.S.jiang y.jiang J.B.Jiao J.K.Jiao z.Jiao S.Jin y.Jin M.Q.Jing x.M.Jing T.Johansson S.Kabana N.Kalantar-Nayestanaki x.L.Kang x.S.Kang M.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf M.Kuessner x.Kui A.Kupsc w.K\"uhn J.J.Lane P.Larin L.Lavezzi T.T.Lei z.H.Lei H.Leithoff M.Lellmann T.Lenz C.li C.li C.H.li Cheng li d.M.li F.li G.li H.li H.B.li H.J.li H.N.li Hui li J.R.li J.S.li K.li L.J.li L.K.li Lei li M.H.li P.R.li Q.M.li Q.x.li R.li S.x.li T.li w.d.li w.G.li x.li x.H.li x.L.li x.y.li y Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and Technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays d^(0)→π^(+)π^(−)π^(+)π^(−)and d^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays d^(0)→a_(1)(1260)π,d^(0)→π(1300)π,d^(0)→ρ(770)ρ(770),and d^(0)→2(ππ)_(S)are observed in both *** the obtained amplitude model,the CP-even fractions of d^(0)→π^(+)π^(−)π^(+)π^(−)and d^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of d^(0)→π^(+)π^(−)π^(+)π^(−)and d^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of d^(0)→4πwhen used to determine the CKM angleγ(ϕ_(3))via the B^(−)→dK^(−)decay.

关键词： BESIII d^(0)meson decays amplitude analysis CP-even fraction

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Science Bulletin 2024年第4期69卷 449-457页

作者： LHAASO Collaboration zhen Cao Chuandong Gao Cong li Ruo-yu liu Ruizhi yang 不详 Key Laboratory of Particle Astrophyics&Experimental Physics division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduChina Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China University of Science and Technology of China Hefei 230026China

we report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UHE)up to a few PeV in the direction of the star-forming region Cygnus x,implying the presence super PeVatron(s)accelerating protons to at least 10 PeV.A log-parabola form with the photon indexΓ(E)=(2.71±0.02)+(0.11±0.02)×log10(E/10 TeV)is found fitting the gamma-ray energy spectrum of the bubble *** sources,“hot spots”correlated with very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter with a sharp central brightening are observed in the *** the core of~0.5°,spatially associating with a region containing massive OB association(Cygnus OB2)and a microquasar(Cygnus x-3),as well as previously reported multi-TeV sources,an enhanced concentration of UHEγ-rays is observed with 2 photons at energies above 1 *** general feature of the bubble,the morphology,and the energy spectrum,are reasonably reproduced by the assumption of a particle accelerator in the core,continuously injecting protons into the ambient medium.

关键词： Cosmic rays γ-rays Interstellar medium Star cluster

Epigenetic and transcriptional landscapes during cerebral cortex development in a microcephaly mouse model

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Journal of Genetics and Genomics 2024年第4期51卷 419-432页

作者： Qing yang Qiang Cao yue yu xianxin Lai Jiahao Feng xinjie li yinan jiang yazhou Sun zhong-wei zhou xin li School of Medicine Shenzhen Campus of Sun Yat-sen UniversityShenzhenGuangdong 518107China Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjin 300072China Scientific Research Center The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhenGuangdong 518107China Guangdong Provincial Key Laboratory of digestive Cancer Research The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhenGuangdong 518107China

The cerebral cortex is a pivotal structure integral to advanced brain functions within the mammalian central nervous *** methylation and hydroxymethylation play important roles in regulating cerebral cortex ***,it remains unclear whether abnormal cerebral cortex development,such as microcephaly,could rescale the epigenetic landscape,potentially contributing to dysregulated gene expression during brain *** this study,we characterize and compare the dNA methylome/hydroxymethylome and transcriptome profiles of the cerebral cortex across several developmental stages in wild-type(wT)mice and Mcph1 knockout(Mcph1-del)mice with severe ***,we discover a global reduction of 5′-hydroxymethylcytosine(5hmC)level,primarily in TET1-binding regions,in Mcph1-del mice compared to wT mice during juvenile and adult ***,genes exhibiting diminished 5hmC levels and concurrently decreased expression are essential for neurodevelopment and brain ***,genes displaying a delayed accumulation of 5hmC in Mcph1-del mice are significantly associated with the establishment and maintenance of the nervous system during the adult *** findings reveal that aberrant cerebral cortex development in the early stages profoundly alters the epigenetic regulation program,which provides unique insights into the molecular mechanisms underpinning diseases related to cerebral cortex development.

关键词： Microcephaly Epigeneticmodification Tet1 Cerebral cortexdevelopment dNA hydroxymethylome Transcriptome

Optimization of performance of the KM2A full array using the Crab Nebula

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Chinese Physics C 2024年第6期48卷 169-178页

作者：曹臻 F.Aharonian 安琪阿西克古白云翔包逸炜 d.Bastieri 毕效军毕玉江蔡金庭曹晴曹文羽曹喆常进常劲帆陈尚明陈恩生陈亮陈林陈龙陈明君陈玛丽陈起辉陈素弘陈天禄陈阳程宁程耀东崔明阳崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布 d.della Volpe 董绪强段凯凯樊军辉范一中方军方堃冯存峰封莉冯少辉丰晓婷冯有亮 S.Gabici 高博高川东高林青高启高卫高伟康葛茂茂耿利斯 G.Giacinti 龚光华苟全补顾旻皓郭福来郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何佳银何新波何钰 M.Heller 贺远强侯博文侯超侯贤胡红波胡铨胡世聪黄代绘黄天奇黄文俊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜晓巍姜泽军金敏康明铭柯通 d.Kuleshov.K.Kurinov 李兵兵李澄李骢李丹李飞李海波李会财李华阳李军李剑李捷李凯李文龙李文莲李秀荣李昕李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣闵振 w.Mitthumsiri 穆慧君南云程 A.Neronov 区子维庞彬宇 P.Pattarakijwanich 裴致远齐孟尧祁业情乔冰强秦家军 d.Ruffolo A.Sáiz d.Semikoz 邵澄宇邵琅 O.Shchegolev 盛祥东舒富文宋慧超 yu.V.Stenkin V.Stepanov 苏扬孙秦宁孙晓娜孙志斌谭柏轩唐庆文唐泽波田文武王超王昌贝王广威王洪光王惠惠王建成汪凯王利苹王玲玉王培汉王冉王为王祥高王祥玉王阳王玉东王岩谨王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁峰徐仁新徐伟立薛良闫大海颜景志颜田杨朝文杨帆杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮查敏张彬彬张丰张海明张恒英张建立张丽霞张力张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张毅张勇赵兵赵静赵雷赵立志赵世平郑福周斌周浩周佳能周猛周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄 LHAASO Collaboration Key Laboratory of Particle Astrophyics&Experimental Physics division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Tianfu Cosmic Ray Research Center Chengdu 610000China dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany State Key Laboratory of Particle detection and Electronics China University of Science and Technology of China Hefei 230026China School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong UniversityChengdu 610031China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Hebei Normal University Shijiazhuang 050024China Key Laboratory of dark Matter and Space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Tsung-dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Physics and Astronomy(zhuhai)&School of Physics(Guangzhou)&Sino-French Institute of Nuclear Engineering and Technology(zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275China School of Physics and Astronomy Yunnan UniversityKunming 650091China département de Physique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde Genève24 Quai Ernest Ansermet1211 GenevaSwitzerland Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China APC Universit'e Paris Cit'eCNRS/IN2P3CEA/IRFUObservat

The full array of the Large High Altitude Air Shower Observatory(LHAASO)has been in operation since July *** its kilometer-square array(KM2A),we optimized the selection criteria for very high and ultrahigh energyγ-rays using data collected from August 2021 to August 2022,resulting in an improvement in significance of the detection in the Crab Nebula of approximately 15%,compared with that of previous *** the implementation of these new selection criteria,the angular resolution was also significantly improved by approximately 10%at tens of *** aspects of the full KM2A array performance,such as the pointing error,were also calibrated using the Crab *** resulting energy spectrum of the Crab Nebula in the energy range of 10-1000 TeV are well fitted by a log-parabola model,which is consistent with the previous results from LHAASO and other experiments.

关键词： γ-ray Crab Nebula significance

Encapsulated Fe(IV)Molecular Complex for Photoacoustic Imaging

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CCS Chemistry 2024年第5期6卷 1184-1197页

作者： ye xu Chao li zhong-yu yu Jiamin wang zhaoyang liu Chao jiang zhen-Feng Chen xiaoyu wu Ming-xing li Hong yang zhao-xi wang Jonathan L.Sessler department of Chemistry Center for Supramolecular Chemistry and CatalysisInnovative Drug Research CenterShanghai UniversityShanghai 200444 College of Chemistry and Materials Science Shanghai Key Laboratory of Rare Earth Functional MaterialsShanghai Frontiers Science Center of Biomimetic CatalysisShanghai Normal UniversityShanghai 200234 Sijing Community Health Service Center of Songjiang district Shanghai 201601 Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Guangxi Normal UniversityGuilin 541004 department of Chemistry The University of Texas at AustinAustinTexas 78712-1224

stable neutral Fe(IV)complex(Fe-HdCL),readily accessible on the g scale,was found to possess high water solubility and good stability(<5%degradation over 4 h upon photoirradiation).Fe-HdCL is green and absorbs light e... 详细信息

stable neutral Fe(IV)complex(Fe-HdCL),readily accessible on the g scale,was found to possess high water solubility and good stability(degradation over 4 h upon photoirradiation).Fe-HdCL is green and absorbs light effectively in the visible region(500–800 nm)with aλmax at 650 nm(ɛ=7830 M^(−1)cm^(−1)).Fe-HdCL also exhibits photothermal(PT)behavior comparable to single-wall carbon nanotubes in the solid *** aqueous solution,high PT conversion(η=72.6%)is achieved,and a strong hyperthermia-based inhibition of cell growth is observed upon subjecting Fe-HdCL to near-infrared 730 nm laser *** biological studies in vitro and in vivo confirmed that Fe-HdCL is biocompatible,clears readily,and allows the visual detection of blood *** subjecting mice to intravenous injection at low doses(e.g.,50μmol·kg^(−1)),Fe-HdCL also permits the photoacoustic(PA)imaging of kidneys and the evaluation of renal fibrosis in mouse *** addition,Fe-HdCL allows PA-based imaging of brain tissues,presumably reflecting its ability to pass through the blood-brain *** thus propose that Fe-HdCL has a role to play as PT agent and as a photodiagnostic.

关键词： stable Fe(IV)complex blood-brain barrier molecular cage photoacoustic imaging renal fibrosis

Emergent ultra-high temperature ferromagnetism in La_(2)CoO_(4±x) thin films

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Nano Research 2024年第8期17卷 7250-7255页

作者： ziang Meng Han yan Peixin Qin zhuo yin Peiheng jiang xiaorong zhou xiaoning wang Hongyu Chen li liu zhiyuan duan Guojian zhao weisheng zhao Fengxia Hu Qinghua zhang zhicheng zhong zhiqi liu School of Materials Science and Engineering Beihang UniversityBeijing 100191China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China CAS Key Laboratory of Magnetic Materials and devices and zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Fert Beijing Institute School of Integrated Circuit Science and EngineeringBeihang UniversityBeijing 100191China

Searching for novel ferromagnetic oxides with high Curie temperature(TC)has been one of the main goals for oxide *** well-known perovskite cobaltate LaCoO_(3)is a classical ferromagnet in its thin-film form;however,it suffers from a low TC(~85 K).Here we report a new type of ferromagnetic La-Co-O films with an ultrahigh TC of~820 *** are fabricated by pulsed laser deposition from a LaCoO_(3)target at low oxygen partial *** structural analysis indicates that they crystallize in terms of the Ruddlesden–Popper phase of La_(2)CoO_(4±x).In sharp contrast to the antiferromagnetism of bulk La_(2)CoO_(4),the strong ferromagnetism in the La_(2)CoO_(4±x) thin films is firmly demonstrated by magnetometry measurements,x-ray magnetic circular dichroism characterization,and magnetotransport *** importantly,density functional theory calculations indicate that the nonstoichiometric oxygen induces an antiferromagnetic-to-ferromagnetic phase transition,accompanied by the orbital reconstruction of Co 3d ***,our study provides an attractive strategy for designing or synthesizing exotic magnetic oxides with high ordering temperatures.

关键词： ferromagnetic oxides ultra-high Curie temperature La_(2)CoO_(4) spin current transport oxygen engineering

青藏高原及其周边白垩纪综合地层、生物群与古地理演化

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中国科学：地球科学 2024年第4期54卷 1244-1307页

作者：席党鹏李国彪姜仕军饶馨江湉王天洋覃祚焕王亚苏贾建忠 Muhammad KAMRAN 史忠叶吴於洋王盘喜孙立新曾庆高万晓樵中国地质大学(北京)生物地质与环境地质国家重点实验室北京100083 河海大学海洋学院南京213200 中国科学院南京地质古生物研究所古生物学与油气地层应用重点实验室南京210008 中国科学院青藏高原研究所青藏高原地球系统与资源环境重点实验室北京100101 中国海洋石油国际有限公司北京100028 上海科技馆上海200120 西藏自治区地质矿产勘查开发局拉萨850000 中国地质调查局天津地质调查中心天津300170

白垩纪是新特提斯洋演化和青藏高原不同板块汇聚的关键时期,详细的地层框架和古地理格局是开展新特提斯洋演化和青藏高原形成研究的基础.本文对青藏高原及周边白垩纪地层、古生物、古地理和重大地质事件开展了系统分析,以建立综合地层框... 详细信息

白垩纪是新特提斯洋演化和青藏高原不同板块汇聚的关键时期,详细的地层框架和古地理格局是开展新特提斯洋演化和青藏高原形成研究的基础.本文对青藏高原及周边白垩纪地层、古生物、古地理和重大地质事件开展了系统分析,以建立综合地层框架,恢复不同时期的古地理格局,探讨重大地质事件的响应和耦合关系.青藏高原及其周边白垩纪地层以海相为主,发育少量海陆交互相和陆相沉积.印度-雅鲁藏布江缝合带发育以蛇绿岩套和含放射虫硅质岩为主的深海沉积,其南侧的特提斯喜马拉雅、印度河盆地等发育浅海至半深海-深海沉积,北侧的日喀则-拉达克弧前盆地发育浅海-半深海相沉积,拉萨地块、喀喇昆仑-塔里木盆地西部和西缅地块等发育浅海、海陆过渡相和陆相沉积,羌塘盆地等其余地区则以陆相沉积为主.青藏高原及其邻区白垩纪地层分布广泛,类型多样,富含有孔虫、钙质超微、放射虫、菊石、双壳类和孢粉等多门类化石;基于岩石地层、生物地层、同位素年代地层和稳定同位素地层等多重地层划分与对比,建立了不同分区地层的划分与对比关系,提出了新的东特提斯区白垩纪综合地层框架.划分了白垩纪新特提斯洋东段及周边不同地理分区的生物群落,阐明了其时空分布特征,恢复了不同时期的生物古地理面貌.青藏高原及周边白垩纪古地理演化可划分为3个阶段:(1)印度板块与澳大利亚-南极洲大陆逐步裂解、拉萨-羌塘地块早期碰撞阶段(145~125Ma);(2)印度板块向北漂移和拉萨-羌塘地块晚期碰撞阶段(125~100Ma);(3)印度板块快速向北漂移、塔里木-喀喇昆仑海湾形成和冈底斯山早期隆升阶段(100~66Ma).白垩纪中期(100Ma左右),印度-特提斯喜马拉雅生物区系经历了冈瓦纳大陆冷水型向特提斯暖水型的转变,海洋生物的多样性达到全盛;白垩纪末期,海洋生物急剧衰退.伴随着印度板块向北漂移和新特提斯洋的演化,新特提斯洋发生了大火成岩省、大洋缺氧、白垩纪大洋红层,以及生物辐射与灭绝等一系重大地质事件.

关键词：青藏高原特提斯白垩纪地层生物群古地理

Unusually high corrosion resistance in Mo_(x)CrNiCo medium entropy alloy enhanced by acidity in aqueous solution

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Journal of Materials Science & Technology 2023年第8期139卷 59-68页

作者： S.Shuang G.J.Lyu d.Chung x.z.wang x.Gao H.H.Mao w.P.li Q.F.He B.S.Guo x.y.zhong y.J.wang y.yang department of Mechanical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 101408China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China Unit of Structures Department of Materials Science and EngineeringKTHStockholm SE-10044Sweden Thermo-Calc Software Råsundav.18SolnaSE-16767Sweden department of Materials Science and Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina Institute of Advanced wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China department of Advanced design and System Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina

High corrosion resistance of alloys is essential for their structural applications;however,most alloys suffer from degradation of their corrosion resistance with the increasing acidity of their ***,we developed a series of medium-entropy alloys(MEAs)in this work,which ex-hibit high strength,superior fracture toughness and ultra-high corrosion resistance,outperforming the variety of corrosion resistant alloys hitherto *** interestingly,our MEAs exhibit an unusual anti-corrosion behavior and their corrosion resistance increases with acidity in Cl−containing *** extensive thermodynamic calculations,density functional theory(dFT)simulations and experi-ments,we reveal that the unusual anti-corrosion behavior of our MEAs can be attributed to their surface chemical complexity,which facilitates the physio-chemical-absorption of H_(2)O and O_(2)and thus the rapid formation of metastable medium entropy passive films that contain the lowest amount of defects,as compared to the passive films on conventional alloys reported in the literature.

关键词： Corrosion Passivation Alloy design Multi-principal element alloys Medium-entropy alloys