简介：ResultsofinelasticneutronscatteringexperinientsandabinitiomoleculardynamicssimulationsforGeTe一theparentcompoundofphase-changematerialsarereported.TheinelasticneutronspectraofGeTepowdersampleshavebeendeterminedinthetemperaturerangeextendingfrom300to700K.Thephononpeaksundergothermalshiftsresultingfromanharmoniceffectsbeingweakerforacousticthanopticmodes.AsmallconcentrationoffreechargecarriesarisingfromthepresenceofGe-vacancieswasfoundnottoaffectsignificantlytheneutronweightedphonondensitiesofstatesofGeTe.Thespectralpatternchangesqualitativelyacrossthestructuralphasetransition,butthelocalstructureofGeTeremainshardlyaffected,asconfirmedbytheanalysisoftemperaturedependenceofthepairdistributionfunctionobtainedfromabinitiomoleculardynamicsinvestigations.Thepresenttheoreticalstudiessupportinawideextentourexperimentalobservationsandalsothoseprovidedbylocalprobemethods.

简介：Numerouscellularfunctionsoccurinspatiallyandtemporallyconfinedregions.Recentstudieshaveshownthatmembrane-lessorganellesandcompartmentsinthecellareassembledvialiquid-liquidphaseseparation(LLPS).InvitroLLPSassaysusingrecombinantexpressedandpurifiedproteinsarenecessaryforustofurtherunderstandhowtheassemblyofphase-separatedcompartmentsisregulatedincells.However;uniformstandardsandprotocolsarelackingfortheseinvitrostudies.Here,wedescribeastep-by-stepprotocolcommonlyusedtoinvestigateinvitroLLPSusingpurifiedproteins.Thisprotocolincludesexpressionandpurificationofthestudiedproteins,inductionofLLPSofthepurifiedproteins,andstudiesofthebiophysicalpropertiesoftheliquiddropletsformedbyLLPS.TheseprotocolscanbeeasilyfollowedbyresearcherstoinvestigatetheLLPSbehaviorsofproteinsofinterest.

简介：Inrecentyears,mteractingtopologicalinsulatorshaveemergedasnewfrontiersincondensedmatterphysics,andthehotlystudiedtopologicalKondoinsulator(TKI)isoneofsuchprototypes.Althoughitszero-temperatureground-statehasbeenwidelyinvestigated,thefinitetemperaturephysicsonTKIislargelyunknown.Here,weexplorethefinitetemperaturepropertiesinasimplifiedmodelforTKI.namelytheone-dimensionalp-waveperiodicAndersonmodel,withnumericallyexactdeterminantquantumMonteCarlosimulation.ItisfoundthatthetopologicalHaldanephaseestablishedforgroimdstateisstillstableagainstsmallthermalfluctuationanditscharacteristicedgemagnetizationdevelopsatlowtemperature.Suchfactsemphasizetherobustnessof(symmetry-protected)topologicalorderagainsttemperatureeffect,whichalwaysexistsatrealphysicalworld.Moreover,weusethesaturatedlow-Tspinstructurefactorandthe1/T-lawofsusceptibilitytodetectthefreeedgespinmoment,interestinglythelow-temperatureupturnbehaxiorofthelatteroneissimilartoexperimentalfindinginSniBgatT<50K.Itimpliesthatsimilarphysicalmechanismmayworkbothforidealizedmodelsandrealisticcorrelatedelectronmaterials.WehavealsoidentifiedanemergentenergyscaleTcr.whichsignalsacrossoverintointerestinglow-TregimeandseemstobetheexpectedRuderman-Kittel-KasuyaYosidacoupling.Finally,thecollectiveKondoscreeningeffecthasbeenexaminedanditisheavilyreducedatboundarywhichmaygiveafruitfulplaygroundfornovelphysicsbeyondthewellestablishedHaldanephaseandtopologicalbandinsulators.

简介：Polyamide/acrylonitrile-butadiene-styrenecopolymer(PA/ABS)blendshavedrawnconsiderableattentionfrombothacademiaandindustryfortheirimportantapplicationsinautomotiveandelectronicareas.DuetopoormiscibilityofPAandABS,developinganeffectivecompatibilizationstrategyhasbeenanurgentchallengetoachieveprominentmechanicalproperties.Inthisstudy,wecreateasetofmechanicallyenhancedPA6/ABSblendsusingtwomulti-monomermelt-graftedcompatibilizers,SEBSg-(MAH-co-St)andABS-g-(MAH-co-St).Thedisperseddomainsizeissignificantlydecreasedandmeanwhiletheunique“softshell-encapsulating-hardcore”structuresforminthepresenceofcompatibilizers.Theoptimummechanicalperformancesmanifestanincreaseof36%intensilestrengthandanincreaseof1300%inimpactstrength,comparedwiththeneatPA6/ABSbinaryblend.

简介：Anovelgas-phaseelectrocatalyticcellcontainingalow-temperatureprotonexchangemembrane(PEM)wasdevelopedtoelectrochemicallyconvertCO2intoorganiccompounds.TwodifferentCu-basedcathodecatalysts(CuandCu-C)werepreparedbyphysicalvapordepositionmethod(sputtering)andsubsequentlyemployedforthegas-phaseelectroreductionofCO2atdifferenttemperatures(70-90℃).ThepreparedelectrodesCuandCu-CwerecharacterizedbyX-raydiffraction(XRD),X-rayphotoemissionspectroscopy(XPS)andscanningelectronmicroscopy(SEM).Asrevealed,CuispartiallyoxidizedonthesurfaceofthesamplesandtheCuandCu-Ccathodiccatalystswerecomprisedofaporous,continuous,andhomogeneousfilmwithnanocrystallineCuwithagrainsizeof16and8nm,respectively.Theinfluenceoftheappliedcurrentandtemperatureontheelectro-catalyticactivityandselectivityofthesematerialswasinvestigated.Amongthetwoinvestigatedelectrodes,thepureCucatalystfilmshowedthehighestCO2specificelectrocatalyticreductionratesandhigherselectivitytomethanolformationcomparedtotheCu-Celectrode,whichwasattributedtothehigherparticlesizeoftheformerandlowerCuO/Curatio.Theobtainedresultsshowpotentialinterestforthepossibleuseofelectrical「enewableenergyforthetransformationofCO2intovaluableproductsusinglowmetalloadingCubasedelectrodes(0.5mgCucm2)preparedbysputtering.

简介：Weproposeasingle-stepimplementationofamuti-target-qubitcontrolledphasegatewithonecatstatequbit(cqubit)simultaneouslycontrollingn—1targetcqubits.Thetwologicstatesofac.qubitarerepresentedbytwoorthogonalcatstatesofasinglecavitymode.Inthisproposal,thegateisimplementedwithnmicrowavecavitiescoupledtoasuperconductingtransnionqutrit.Becausethequtritremainsinthegroundstateduringthegateoperation,decoherencecausedduetothequtrit5senergyrelaxationanddephasingisgreatlysuppressed.Thegateimplementationisquitesimplebecauseonlyasingle-stcpoperationisneededandneitherclassicalpulsenormeasurementisrequired.Numericalsimulationsdemonstratethathigh-fidelityrealizationofacontrolledphasegatewithonecqubitsimultaneouslycontrollingtwotargetcqubitsisfeasiblewithpresentcircuitQEDtechnology.Thisproposalcanbeextendedtoawiderangeofphysicalsystemstorealizetheproposedgate,suchasmultiplemicrowaveoropticalcavitiescoupledtoanaturalorartificialthree-levelatom.

简介：ThepolycrystallinephaseWO3/g-C3N4wassynthesizedunderstirringusingtungstenicacid(H2WO4)andgraphiticcarbonnitride(g-C3N4)asrawmaterials.ThecatalystwascharacterizedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),energydispersivespectroscopy(EDS),theFouriertransforminfraredspectroscopy(FT-IR),andtheBrunauer-Emmett-Telleranalysis(BET).ThepolycrystallinephaseWO3/g-C3N4wasdeterminedbyXRDtechnique.TheoxidativedesulfurizationprocesswasinvestigatedusingWO3/g-C3N4asthecatalyst,30%hydrogenperoxide(H202)astheoxidant,and1-butyl-3-methylimidazoliumtetrafluoroborate([bmim]BF4)ionicliquids(ILs)astheextractant.Theoperatingconditions,includingH2WO4amount,ILdose,H2O2volume,temperature,catalystdosage,andtypesofsulfurcompounds,weresystematicallyresearched.Thedesulfurizationratecouldreach98.46%forremovingdibenzothiophene(DBT)fromthemodeloilunderoptimalreactionconditions.Inaddition,thecatalyticactivitywasslightlydecreasedafterfiverecyclesofcatalysts.Thereactionkineticsanalysisshowsthattheoxidativedesulfurizationsystemwasinaccordwiththefirst-orderreactionkineticsequation.Themechanismofoxidativedesulfurizationwasproposed.

简介：Tuningthecoloroutputofrare-earthiondopedluminescentnanomaterialshasimportantscientificsignificanceforfurtherextendingapplicationsincolordisplays,lasersources,optoelectronicdevices,andbiolabeling.Inpreviousstudies,pre-designedphasemodulationofthefemtosecondlaserfieldhasbeenproventobeeffectiveintuningtheluminescenceofdopedrare-earthions.Owingtothecomplexlight–matterinteractionintheactualexperiment,thedynamicrangeandoptimalefficiencyforcolortuningcannotbedeterminedwiththepre-designedphasemodulation.Thisarticlesharesthedevelopmentofanadaptivefemtosecondpulseshapingmethodbasedonageneticalgorithm,anditsusetomanipulatethegreenandredluminescencetuninginanEr3+-dopedglassceramicunder800-nmfemtosecondlaserfieldexcitationforthefirsttime.ExperimentalresultsshowthattheintensityratioofthegreenandredUCluminescenceofthedopedEr3+ionscanbeeitherincreasedordecreasedconvenientlybythephase-shapedfemtosecondlaserfieldwithanoptimalfeedbackcontrol.Thephysicalcontrolmechanismsforthecolortuningarealsoexplainedindetail.Thisarticledemonstratesthepotentialapplicationsoftheadaptivefemtosecondpulseshapingtechniqueincontrollingthecoloroutputofdopedrare-earthions.

简介：WehavecomprehensivelyinvestigatedthefrustratedJ1-J2-J3Heisenbergmodelonasimplecubiclattice.Thismodelallowsthreeregimesofmagneticorder,viz.,(π;π;π),(0;π;π)and(0;0;π),denotedasAF1,AF2,andAF3,respectively.Theeffectsoftheinterplayofneighboringcouplingsonthemodelarestudiedintheentiretemperaturerange.Thezerotemperaturemagneticpropertiesofthismodelarediscussedutilizingthelinearspinwave(LSW)theory,nonlinearspinwave(NLSW)theory,andGreen’sfunction(GF)method.ThezerotemperaturephasediagramsevaluatedbytheLSWandNLSWmethodsareillustrated,andareobservedtoexhibitdifferentparameterboundaries.Incertainregionsandalongtheparameterboundaries,thepossiblephasetransformationsdrivenbytheparametersarediscussed.TheresultsobtainedusingtheLSW,NLSW,andGFmethodsarecomparedwiththoseobtainedusingtheseriesexpansion(SE)method,andareobservedtobeingoodagreementwhenthevalueofJ2isnotclosetotheparameterboundaries.ThegroundstateenergiesobtainedusingtheLSWandNLSWmethodsareclosetothatobtainedusingtheSEmethod.Atfinitetemperatures,onlytheGFmethodisemployedtoevaluatethemagneticproperties,andthecalculatedphasediagramisobservedtobeidenticaltotheclassicalphasediagram.Theresultsindicatethatattheparameterboundaries,atemperature-drivenfirst-orderphasetransitionbetweenAF1andAF2mayoccuralongtheboundaryline.AlongtheAF1-AF3andAF2-AF3boundarylines,AF3islessstablethanAF1andAF2.OurcalculatedcriticaltemperatureagreeswiththatobtainedusingMonteCarlosimulationsandpseudofermionfunctionalrenormalizationgroupscheme.