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主讲教师:SUN Yugang 人气:1595 更新时间: 2018年07月21日
Abstract:Generationofhotcarriersintransitionmetalcatalyststhroughphotoexcitationhasbeendemonstratedtobeapromisingapproachcapableofsignificantlyloweringactivationtemperatureofthecatalysts,whichcouldhaveawidespreadimpactonsubstantiallyreducingthecurrentenergydemandsandimprovingtheselectivityofheterogeneouscatalysis.PlasmonicnanoparticlesmadeofAu,Ag,Cu,andAlarerecentlyfocusedbecausetheycanactivelyabsorblightatthecorrespondingsurfaceplasmonresonance(SPR)frequencies,whichareusuallyinthevisiblespectralregion.Thehighopticalabsorptionsleadtothegenerationofhotcarriersinplasmonicnanoparticles,onwhichthehotcarrierscandirectlydrivechemicaltransformations.Despitethepromise,plasmonicmetalnanoparticlesarenotusefulcatalystsforawiderangeofimportantreactions.Incontrast,platinum-groupmetals(PGMs)suchasPt,Pd,RuorRhareexcellentcatalyticmaterialsbutexhibitSPRintheultraviolet(UV)spectralregion,whichrepresentsasignificantdisadvantageforphotocatalysisduetothepooroverlapwiththesolarspectrum.AlthoughincreasingsizeofPGMnanoparticlesshiftsSPRabsorptiontothered,itincreasescostandreducessurfaceareaandthuscatalyticactivity.Moreover,increasingthesizeofmetalnanocrystalssignificantlyreducestheyieldofhotelectrongeneration,loweringtheefficiencyofphotochemicalenergyconversion.Inthispresentation,anewlightabsorptionmodelwillbediscussedtodemonstrateatransformativewaytoenhanceopticalabsorptioninsmallPGMnanoparticlesinthevisiblespectralregionbyadjustingtheirdielectricenvironmentinsteadofchangingtheirsize.Inthismodel,the“quantum-sized”metalnanocrystalsareattachedtosurfacesoftransparentsilicaspheres,whichcansupportavarietyofdielectricscatteringresonances(e.g.,Fabry-PerotorWhisperingGallerymodesdependingonthesizeofsilicaspheres)capableofcreatingstrongelectricfieldsnearthesilicasurface.Theintensifiednearfieldscandramaticallyenhancetheabsorptioncross-sectionofthemetalnanocrystals,whichareonthesilicasurface,thusimprovingtheyieldof“hotelectrons”inthemetalnanocrystals.ThisnewmodelprovidesauniqueopportunitytoefficientlygeneratehotcarriersinthePMGmetalnanoparticlesuponexcitationofsolarenergy.Biography:Dr.YugangSunobtainedhisB.SandPh.DdegreefromUniversityofScienceandTechnologyofChina(USTC)in1996and2001,respectively.HethenworkedasapostdoctoralfellowwithProf.YounanXiaattheUniversityofWashingtonandProf.JohnA.RogersattheUniversityofIllinoisatUrbana-Champaign.In2006,Dr.SunjoinedtheCenterforNanoscaleMaterialsatArgonneNationalLaboratory(ANL)tostarthisindependentresearchcareer.HemovedtoChemistryDepartmentofTempleUniversityinJanuary2016.HereceivedthePresidentialEarlyCareerAwardforScientistsandEngineers(PECASE)in2007andDOE’sOfficeofScienceEarlyCareerScientistandEngineeringAwardin2008.Hisworkhasasignificantimpactthefieldofnanomaterials,andhewaslistedinthetop100chemists(#62)andtop100Materialsscientists(#5)analyzedbyThomsonReutersin2011.Hisresearchiscenteredinthedesign/synthesisofhybridnanostructuresaswellasinvestigationofnovelpropertiesofthesynthesizednanostructuresinthecontextofnanophotonics,photocatalysis,sensing,andenergystorage/conversion.
主讲教师:Steven G. Louie 人气:1001 更新时间: 2018年07月17日
Abstract:Symmetry,interactionandtopologicaleffects,aswellasenvironmentalscreening,dominatemanyofthequantumpropertiesofreduced-dimensionalsystemsandnanostructures.Theseeffectsoftenleadtomanifestationofcounter-intuitiveconceptsandphenomenathatmaynotbesoprominentorhavenotbeenseeninbulkmaterials.Inthistalk,Ipresentsomefascinatingphysicalphenomenadiscoveredinrecentstudiesofatomicallythinone-dimensional(1D)andtwo-dimensional(2D)materials.Anumberofhighlyinterestingandunexpectedbehaviorshavebeenfound–e.g.,stronglyboundexcitons(electron-holepairs)withunusualenergylevelstructuresandnewtopology-dictatedopticalselectionrules;tunablemagnetismandplasmonicproperties;noveltopologicalphases;correlatedmulti-particleexcitations;etc.–addingtothepromiseof1Dand2Dmaterialsforexplorationofnewscienceandvaluableapplications.  ThisworkwassupportedbytheU.S.DepartmentofEnergy,NationalScienceFoundation,andOfficeofNavalResearch.Biosketch:  ProfessorLouiereceivedhisPh.D.inphysicsfromtheUniversityofCaliforniaatBerkeley(UCBerkeley)in1976.AfterhavingworkedattheIBMWatsonResearchCenter,BellLabs,andUofPenn,hejoinedtheUCBerkeleyfacultyin1980,whereheisprofessorofphysicsandconcurrentlyafacultyseniorscientistattheLawrenceBerkeleyNationalLab.HeisamemberoftheNationalAcademyofSciences,theAmericanAcademyofArts&Sciences,andtheAcademiaSinica(Taiwan),aswellasafellowoftheAmericanPhysicalSociety(APS)andtheAmericanAssociationfortheAdvancementofScience.Amonghismanyhonors,heisrecipientoftheAPSAneesurRahmanPrizeforComputationalPhysics,theAPSDavisson-GermerPrizeinSurfacePhysics,theMaterialsTheoryAwardoftheMaterialsResearchSociety,theForesightInstituteRichardP.FeynmanPrizeinNanotechnology,theU.S.DepartmentofEnergyAwardforSustainedOutstandingResearchinSolidStatePhysics,aswellasJubileeProfessoroftheChalmersUniversityofTechnologyinSwedenandH.C.?rstedLectureroftheTechnicalUniversityofDenmark.ProfessorLouie’sresearchspansabroadspectrumoftopicsintheoreticalcondensedmatterphysicsandnanoscience.HeisknownforhisgroundbreakingworkontheabinitioGWmethodandforhisseminalworkonsurfacesandinterfaces,nanostructures,andreduced-dimensionalsystems.
主讲教师:唐军旺 人气:1190 更新时间: 2018年07月08日
Abstract:Solarenergyconversionandstorageintoahighdensityenergymediume.gH2viawatersplittinghasbeenattractingsubstantialinterestoverthelastdecade,whichcanprovidenotonlyrenewableH2fuelbutalsoacarbon-zeroeconomy.Thekeyinthistechnologyisanefficientphotocatalyst.ThecurrentlowefficiencyinwatersplittingtoH2fuelprocessiscontributedtobothfastchargerecombinationandlargebandgapofaninorganicsemiconductor.1Stimulatedbyourrecentresearchoutcomesonthechargedynamicsininorganicsemiconductorphotocatalysts,wedevelopednovelmaterialsstrategiesforsolardrivenhydrogensynthesisbypolymerphotocatalysts.Oneistomitigatethechargerecombinationbyimprovingthedegreeofpolymerizationofapolymere.g.C3N4.Withrespecttoit,onesuccessfulexampleofpurewatersplittinginasuspensionssolutionundervisiblelighthasbeendemonstratedforthefirsttime.2,3Theotherstrategyistonarrowthebandgapofcarbonnitridesbybandgapengineering.Thematerialpreparedviaanoxygenrichorganicprecursorhasadarkcolor,resultingintoanefficientH2productionfromwaterbyUVandvisible,evenIRlightwithaquantumyield(QY)of10%at420nm,whichisthefirstexampleofapolymerphotocatalystworkinginsuchlongwavelengthforH2fuelproduction.4Thechargedynamicsinthesepolymerphotocatalystswerealsosystematicallyinvestigated,5resultingintoaphotoanodecomposedthislowcostpolymerforsolartoH2fuelsynthesis.6Inparallel,newpolymersforwateroxidation,whichisharderandmorechallengingthanhalfH2productionreaction,hasbeendiscovered,leadingtoacovalenttriazineframeworkpolymerwithefficientactivityforoxygenproductionfromwaterapartfromH2production.7References1.Y.Wang,H.Suzuki,J.Xie,O.Tomita,D.J.Martin,M.Higashi,D.Kong,R.Abe,J.Tang,Chem.Rev.,2018,DOI:10.1021/acs.chemrev.7b002862.D.J.Martin,P.J.T.Reardon,S.J.AMoniz,J.Tang.J.Am.Chem.Soc.,2014,136,12568-12571.3.D.J.Martin,K.Qiu,S.A.Shevlin,A.D.Handoko,X.Chen,Z.Guo,andJ.Tang.AngewandteChemieInternationalEdition2014,53,9240-9245.4.Y.Wang,M.K.Bayazit,S.JMoniz,Q.Ruan,C.Lau,N.Martsinovich,J.Tang,EnergyEnvironSci,2017,10,1643-1651.5.R.Godin,Y.Wang,M.A.Zwijnenburg,J.Tang,J.R.Durrant,J.Am.Chem.Soc.2017,139(14),5216–52246.Q.,Ruan,W.Luo,,J.Xie,,Y.Wang,,X.Liu,,Z.Bai,,CJ.Carmalt,J.Tang,AngewandteChemieInternationalEdition,2017,28,8221-8225.7.J.Xie,S.AShevlin,Q.Ruan,S.Moniz,Y.Liu,X.Liu,Y.Li,C.C.Lau,Z.X.Guo,J.Tang,EnergyEnvironSci,2018,DOI:10.1039/C7EE02981KBiosketch:  Prof.JunwangTangisaProfessorofChemistryandMaterialsEngineeringintheDepartmentatUCL,DirectoroftheUniversityMaterialsHubandaFellowoftheRSC.HereceivedhisPhDinPhysicalChemistryin2001.HisresearchinterestsencompasssolarH2synthesisfromwater,CO2captureandconversion,photocatalyticmethaneconversionandammoniasynthesisaswellasfunctionalmaterialssynthesisbyamicrowaveintensifiedfluidicsystem.Suchstudiesareundertakeninparallelwiththemechanisticunderstandinganddeviceoptimisationtoaddresstherenewableenergysupplyandenvironmentalpurification.Hisresearchhasledto>120paperswith>8000citations,11patentsandmanyinvitedlectures.HeistheEditor-in-ChiefoftheJournalofAdvancedChemicalEngineering,anAssociateEditorofAsia-PacificJournalofChemicalEngineering,theguestEditor-in-ChiefoftheInternationalJournalofPhotoenergyandAssociateEditorofChinJ.Catalysisapartfromsittingontheeditorialboardofotherinternationaljournals.
主讲教师:阿里耶·瓦舍尔 人气:1187 更新时间: 2018年07月05日
关于“合肥大师论坛”之诺贝尔化学奖得主阿里耶·瓦舍尔教授学术报告会的通知  应学校邀请,美国南加州大学教授、美国国家科学院院士、英国皇家化学学会荣誉会士、诺贝尔化学奖得主阿里耶·瓦舍尔教授将于7月4日来校作《用计算机模拟来研究健康问题的分子基础》学术报告。  报告时间:7月4日16:00  报告地点:东区师生活动中心五楼国际会议厅  欢迎全校感兴趣的师生参加,请提前十分钟入场。  国际合作与交流部  2018年6月29日
主讲教师:Weinan E 人气:1141 更新时间: 2018年06月27日
Abstract:Multi-scalemodelingisanambitiousprogramthataimsatunifyingthedifferentphysicalmodelsatdifferentscalesforthepracticalpurposeofdevelopingaccuratemodelsandsimulationprotocalsforpropertiesofinterest.Althoughtheconceptofmulti-scalemodelingisverypowerfulandveryappealing,practicalsuccessonreallychallengingproblemshasbeenlimited.Onekeydifficultyhasbeenourlimitedabilitytorepresentcomplexmodelsandcomplexfunctions.Inrecentyears,machinelearninghasemergedasapromisingtooltoovercomethedifficultyofrepresentingcomplexfunctionsandcomplexmodels.Inthistalk,wewillreviewsomeofthesuccessesinapplyingmachinelearningtomulti-scalemodeling.Wewillalsodiscussthechallengings,boththeoreticalandpracticalthatwestillface.Biosketch:WeinanEisaprofessorintheDepartmentofMathematicsandPrograminAppliedandComputationalMathematicsatPrincetonUniversity.HeisalsothedirectoroftheCenterforDataHewaselectedasamemberoftheChineseAcademyofSciencesin2011.HebecameaninauguralfellowoftheSocietyofIndustrialandAppliedMathematicsin2009andaninauguralfellowofAmericanMathematicalSocietyin2012.HewasalsoelectedamemberoftheInstituteofPhysicsin2005.
主讲教师:郭华 人气:981 更新时间: 2018年06月21日
Abstract:Theunderstandingoflow-temperaturereactivityrequiresanaccuratedescriptionoftheunderlyingpotentialenergysurfaceandthecorrespondingdynamics.Atlowtemperatures,quantumeffectssuchaszero-pointenergy,tunneling,andresonancesbecomesparticularlyimportant.Inaddition,manysuchreactionsarenotstatistical,andasaresultdynamicalcorrectionsareimportant.Forthesereasons,accuratetheoreticalpredictionoflow-temperatureratecoefficientsfromthefirstprinciplesisratherchallenging.Inthistalk,wedescribeourrecenteffortsindevelopinghighlyaccurateabinitiobasedpotentialenergysurfacesforbarrierlesscomplex-formingsystemsandincomputinglow-temperatureratecoefficientsandproductbranchingratiosforion-moleculeandneutral-neutralreactions.Biosketch:Prof.HuaGuoreceivedhisMasterdegreefromSichuanUniversityin1985andfinishedPhDprogramatUniversityofSussexin1988.AfterworkingwithProf.G.SchatzasaPostdoctoralFellowfrom1988-1990,hebecameanAssistantProfessoratUniversityofToledofrom1990-1995,andpromotedtoAssociateProfessorsince1995.In1998,hemovetoUniversityofNewMexicobecameafullProfessorin2001.HewashonoredasDistinguishedProfessor(since2015)andelectedtoAmericanPhysicalSociety(APS)Fellow(2013).Since2016,HebecameaSeniorEditorofJ.Phys.Chem.A/B/C.Prof.Guohaspublished~450paperswithover13000citationsandanH-indexof57.Hisinterestsfocuson(1)Theoreticalandcomputationalstudiesofelectronicandvibrationalspectra;(2)Reactiondynamicsofpolyatomicmolecularsystems;(3)Mechanismsanddynamicsofsurfacereactionstoheterogeneouscatalysis.
主讲教师:刘仁保 人气:1165 更新时间: 2018年05月26日
报告介绍:Quantumcomputerswillonedayrevolutionizeourtechnologiesandlivesbutrequirecontrolofmanyquantumbits(qubits),whichisstillbeyondthereachofcurrenttechnology.Hereweshowthateventhecontrolofonesinglequbitcanalreadyfacilitateusefulquantumtechnologies.Thecontrolandmeasurementofasinglequbitassociatedwiththenitrogen-vacancycenterindiamondhasbeenexploitedforultrasensitivemagnetometryandsingle-moleculenuclearmagneticresonance(NMR),recentlyhertz-resolutionsingle-spinNMRachieved.Wealsofindthatdecoherenceofaqubitisfundamentallyconnectedtothethermodynamicsoftheenvironmentinthecomplexplaneofphysicalparameters.Basedonthatfinding,weobservedtheLee-Yangzeros,whichwasstudiedintheoriesbyT.D.LeeandC.N.Yangin1952butneverobservedinexperimentsbefore.Anewtypeofphasetransitions,whichoccurinthetimedomain,isassociatedwithsingularityofthermodynamicfunctionsinthecomplexplane.Abitofquantuminformationhasalreadyalotofapplications.Thatmaybejustthetipofaniceberg.Biosketch:Prof.RenbaoLiugothisBScdegreein1995fromNanjingUniversity,DepartmentofPhysicsandPhDdegreein2000fromInstituteofSemiconductors,ChineseAcademyofScience.AfterpostdoctoralresearchesinCenterforAdvancedStudy,TsinghuaUniversityandinDepartmentofPhysics,UniversityofCalifornia–SanDiego,hejoinedTheChineseUniversityofHongKong(CUHK)in2005asafacultymemberofDepartmentofPhysics,wherehasbeenafullprofessorsince2014.Hisresearchinterestsincludecondensedmatterphysics,quantumoptics,nonlinearoptics,quantumcomputing,andquantumsensing.Hewasawarded,amongotherhonors,CUHKYoungResearcherAward(2010),DistinguishedFellowofFacultyofScience,CUHK(2013),HuangKunPrize(2013),andCUHKResearchExcellenceAward(2014).
主讲教师:张广照 人气:1137 更新时间: 2018年04月28日
报告摘要:海洋微生物、动植物在海洋设施表面的粘附、生长形成海洋生物污损,它对海洋工业和海洋活动有深刻的影响。海洋污损会增加舰船的航行阻力,削弱海军的战斗力;增加舰船重量,从而增加能耗和二氧化碳的排放量。海洋污损会堵塞核电站的输水管路,从而降低其冷热交换效率,甚至引发核事故;它还会阻碍潮汐发电、抽海水蓄能电站中发电机的运转。海洋污损会缩小海水养殖网箱的网孔,导致鱼虾的大面积死亡。总之,海洋防污是一个与能源、环境、国防等国家重大战略需求相关的课题,但也是一个国际性的难题。本报告将介绍海洋防污材料的历史、现状和最新进展,特别是报告人有关“动态表面海洋防污”的策略和生物降解高分子基海洋防污材料。报告人简介:张广照,教育部“长江学者”特聘教授,国家杰出青年基金获得者,科技部重大研究计划项目首席科学家。本科毕业于四川大学(1987),复旦大学博士(1998),香港中文大学(1999-2001)和美国麻省大学(2001-2002)博士后。2002年任中国科学技术大学化学物理系、合肥微尺度国家实验室(筹)教授。2010年任华南理工大学高分子材料科学与工程系教授。目前担任国际海洋材料保护研究常设委员会(COIPM)委员,中国材料研究学会高分子材料与工程分会副主任,广东省化学会高分子化学专业委员会主任。先后任Macromolecules(2012-2014),ACSMacroLetters(2012-2014),MacromolecularChemistryandPhysics,ChineseJouralofPolymerScience,《高分子材料科学与工程》编委。主要从事高分子物理化学(溶液与界面)方面的工作,包括大分子构象行为与相互作用的基础研究,以及海洋防污材料、岩土工程材料的应用研究。
主讲教师:Mikhail Katsnelson 人气:1412 更新时间: 2018年04月25日
Abstract:Ahugerecentprogressinthesamplequalitymakesmany-bodyeffectsinelectronspectrumofgraphenenearneutralitypointobservable.ModelapproachesfortheDiracelectronswithCoulombinteractionwereintensivelydevelopedinthelasttenyears.Iamgoingtofocus,rather,onmaterials-scienceaspectsoftheproblem,includingfirst-principlescalculationsofeffectiveCoulombinteractionanditsfurthermappingontheoptimalHubbardmodel;Iwilldiscussalsoaproblemofsp-electronmagnetismingrapheneandothergraphiticsystems.IwillpresentalsotheresultsofQuantumMonteCarlosimulationsforpristineanddefectedgraphene.Theydemonstrateacrucialimportanceofrealisticinterelectroninteractionpotentialforthephasediagramofisolatedgrapheneandgivethefinalanswerinalongandcontroversialdiscussiononmany-bodyrenormalizationofopticalconductivityingraphene.Itturnsoutthatthisrenormalizationisveryweakorabsent.Asanexampleofunusualmany-bodyeffectsingrapheneIwilldiscussalsotherenormalizationofballisticminimalconductivitybytheelectron-electronCoulombinteraction.Biosketch:  MikhailKatsnelsonfinishedUralStateUniversity(Sverdlovsk,USSR–nowEkaterinburg)in1977andreceivedPhDin1980;formanyyears(1977-2001)hewasworkingintheInstituteofMetalPhysicsinEkaterinburg(thelastposition–headofthegroupofQuantumTheoryofMetals).Hebecametheyoungestphysicist-DoctorofSciencesintheUSSR(1985)andreceivedLeninKomsomolPrize(StatePrizeforyoungresearchers,1988).AfterworkingforseveralyearsasavisitingprofessorinUppsalaUniversity(Sweden)hebecame(in2004)professoroftheoreticalphysicsandheadofthegroupofTheoryofCondensedMatterinRadboudUniversity(Nijmegen,Netherlands).Heisoneofthemostactiveandmostrecognizedtheoreticalphysicistsnow,withmorethan80,000citationsaccordingtoGoogleScholar(h=98).Prof.Katsnelsonworksinmanyfieldsofphysics,fromfoundationsofquantummechanicstoapplicationsofstatisticalphysicsinbiology.Hisbestknownachievementsareinthetheoryofgraphene,magnetismandstronglycorrelatedsystems.HeisawardedbySpinozaPrize(topscientificawardinNetherlands),HamburgPrizeinTheoreticalPhysicsandbyRoyaldecorationasaKnightoftheOrderoftheNetherlandsLion.Prof.KatsnelsoniselectedmemberofRoyalNetherlandsAcademyofArtsandSciences,AcademiaEuropaeaandRoyalSocietyofSciencesatUppsalaandhonorarydoctorofUppsalaUniversity.
主讲教师:尤力 人气:1442 更新时间: 2018年03月28日
报告摘要:关于测量的科学至关重要。测量的精度决定了我们对自然的认知程度和相关自然规律的准确度。基于单个物理体系多次测量或它的多份(系综)测量,其精度受限于经典极限。利用量子纠缠的系综可以压制噪声超越经典极限。本报告将介绍我们最近利用量子相变制备纠缠的原子玻色-爱因斯坦凝聚体并开展量子测量的研究结果和进展。“Deterministicentanglementgenerationfromdrivingthroughquantumphasetransitions,”Science355,620(2017).“Beatingtheclassicalprecisionlimitwithspin-1Dickestateofmorethan10000atoms,”arXiv:1802.10288.报告人简介:南京大学物理学学士(1983-1987),CUSPEA(1987)克罗拉多大学JILA物理学博士(1988-1993)哈佛-史密森天体物理中心,理论原分所博士后(1993-1996)美国佐治亚理工助理教授、副教授、教授(1996-2010)美国ONRYIPAward(1997-2000)美国NSFCareerAward(1997-2002)中科院理论物理研究所-NSFC海外杰青(2002-2005)清华高等研究中心教育部第六届长江学者讲座教授(2005-2009)Fellow,AmericanPhysicalSociety(2007-)清华大学物理系教授(2009/12-)中组部第五批千人计划(2010-),国家特聘专家(2011-)科技部重大研究计划“冷原子与偶极量子气体的性质与调控”首席(2013-17)清华-北大-物理所2011协同创新介观光学与冷原子平台主任(2013-)基金委“精密测量物理”重大研究计划专家组副组长(2013-)2013年美国引力研究基金会论文一等奖(GRAVITYRESEARCHFOUNDATION)2017年科技部中国科学十大进展:“利用量子相变确定性制备出多粒子纠缠态”
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Aranda Pino
Profesor of Department of Algebra, Geometry and Topology Science Faculty, University of Málaga, Spain. Research Interests: Leavitt path
Nikos Hadjichristidis
Prof. Nikos Hadjichristidis, Department of Chemistry, University of Athens.
蔡荣根
中国科学院理论物理所研究员,博士生导师。中国引力和相对论天体物理学会副理事长(2008-) 中国科学技术大学交叉学科理论研究中心兼职教授
欧阳钟灿
欧阳钟灿,中国科学院院士。1968年清华大学自控系毕业,1981年清华大学物理系固体物理专业获硕士学位,1984年获光学专业理学博士学位。1985-1986年在理论物理所
Manuela M. Veloso
Manuela M. Veloso教授是国际人工智能和自主机器人领域的主要学界领导人和学术带头人之一,取得了一系列杰出成就,其中部分成果产生了深远的影响。
庄小威
庄小威,华裔美籍生物物理学家,美国国家科学院院士, 哈佛大学化学与化学生物、物理学教授,创办有庄小威实验室。
课件总访问人次:21910743
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