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简介：Two-dimensional(2D)periodicalAuandindiumtinoxide(ITO)nanocompositearrayshavebeenfabricatedbasedonaself-assemblednanospherelithographytechnique.Abutton-shapedAunanoparticlewasformedoneachhollowhemisphere-shapedITOshell.Importantly,theunderlyingformationmechanismduringthethermaltreatmenthasbeenthoroughlyexploredbycomparingstructuresresultingfromdifferentdepositionconditionsindetail.ComparedtotheAunanoparticlearrayswithoutITOshells,theAu/ITOnanocompositearraysshowedastrongerlocalizedsurfaceplasmonresonanceeffectandhigherabsorptioninthenear-infrared(NIR)region,benefitingfromthefree-electroninteractionenhancementbetweenAuandITO.Thenonlinearopticalpropertieswereinvestigatedusingamodifiedfemtosecondintensity-scansystem,andtheresultsdemonstratedAu/ITOnanocompositearrayswitharemarkabletwo-photonabsorptionsaturationeffectforfemtosecondpulsesat1030nm.TheversatileNIRopticalresponsesindicatethegreatpotentialoftheelaboratelyprepared2DperiodicalAu/ITOnanocompositearraysinmanyapplicationssuchassolarcells,photocatalysis,andnovelnanooptoelectronicdevices.

简介：WereportontheoperationofpassivelyQ-switchedwaveguidelasersat1μmwavelengthbasedonagraphene∕WS2heterostructureasasaturableabsorber（SA）.ThegainmediumisacrystallineNd:YVO4claddingwaveguideproducedbyfemtosecondlaserwriting.Thenanosecondwaveguidelaseroperationat1064nmhasbeenrealizedwiththemaximumaverageoutputpowerof275mWandslopeefficiencyof37%.IncomparisonwiththesystemsbasedonsingleWS2orgrapheneSA,thelasingQ-switchedbyagraphene∕WS2heterostructureSApossessesadvantagesofahigherpulseenergyandenhancedslopeefficiency,indicatingthepromisingapplicationsofvanderWaalsheterostructuresforultrafastphotonicdevices.

简介：近似所有人的癌症表演正常TP53基因表示的一半但是MDM2或MDMX的异常overexpression。这个事实建议有希望的癌症在指向在p53和MDM2/MDMX之间的相互作用的治疗学的策略。为了帮助，实现开发有效禁止者破坏p53-MDM2/MDMX相互作用的目标，我们系统地调查了结构并且有它和从用随机的分子的动力学模拟的一个原子论的观点的MDM2和MDMX的相互作用的禁止者的p53的相互作用特征。我们发现在MDM2和MDMX玩的结构的某特定的helices在他们的绑定给角色调音到禁止者，并且氢契约在MDM2或MDMX与它的对应物由p53的Trp23残余形成了，这在vivo从MDM2-p53建筑群决定MDM2-p53相互作用的混乱和p53的代替的动态比赛过程。结果在这报导纸被期望为设计功能的禁止者并且认识到癌症基因治疗的新策略提供基本信息。

简介：Thethird-ordernonlinearopticalpropertiesofwater-solubleCu2-xSenanocrystalsarestudiedinthenearinfraredrangeof70-980nmusingafemtosecondpulsedlaserbytheZ-scantechnique.ItisobservedthatthenonlinearopticalresponseofCu2-xSenanocrystalsissensitivelydependentontheexcitationwavelengthandexhibitstheenhancednonlinearitycomparedwithotherselenidessuchasZnSeandCdSe.TheW-shapedZ-scantrace,amixtureofthereversedsaturatedabsorptionandsaturatedabsorption,isobservedneartheplasmonresonancebandofCu2-xSenanoerystals,whichisattributedtothestate-fillingoffreecarriersgeneratedbycoppervacancies（self-dopingeffect）ofCu2-xSenanoerystalsaswellasthehotcarrierthermaleffectuponintensefemtosecondlaserexcitation.ThelargenonlinearopticalresponseandtunableplasmonicbandmakeCu2-xSenanocrystalspromisingmaterialsforapplicationsinultra-fastall-opticalswitchingdevicesaswellasnonlinearnanosensors.

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简介：Ceria-zirconiasolidsolutionhasbeenpreparedbytheureagrindcombustionandcitricacidsol-gelmethodsforcatalyticapplicationsasoxygenstorage/releasematerialsinthisstudy.Thepropertiesandoxygenstorage/releasecapacitiesofsampleswithdifferentZrcontentswerecharacterizedandevaluatedbyX-raydiffraction（XRD）,N2adsorption,scanningelectronmicroscopy（SEM）,Ramanspectroscopy,andinsituCO–CO2loopingtest.Theresultsdemonstratethatthesamplespreparedbytwomethodsareallofexcellentlattice[O]release/storagepropertiesandmaintaingoodlong-termcyclestability.ButthepreparationmethodsignificantlyimpactsthehomogeneityofsamplesrelatedtotheirredoxpropertiesandthecontentofZrover20%,whichgreatlychangedthepropertiesofceria-zirconiasolidsolutionsandcausedtheirchangingofcrystallinesymmetryfromcubictotetragonal.Thesamplespreparedbycitricacidsolgelmethodareofmorehomogeneousparticlesizesandhigherspecificsurfaceareasthanthatbyureagrindcombustionmethod,whichisbenefittotheoxygenreleaseratherthanoxygenstorage.ThebulkoxygenamountmigratedtosurfaceincreaseswiththeincreasingZrcontent,however,theamountoflatticeoxygenmigrationdecreaseswhenZrcontentisover20%.WhenZrcontentis20%,thedifferencesofstorage/releasecapacitiesfromtwodifferentpreparationmethodsarereducedathightemperatureinthelong-termloopreaction.

简介：Transversemodeinstability(TMI)hasbecomethemajorlimitationforpowerscalingoffiberlaserswithnearlydiffraction-limitedbeamquality.Comparedwithaco-pumpedfiberlaser,acounter-pumpedfiberlaserrevealsTMIthresholdenhancementthroughasemi-analyticalmodelcalculation.Wedemonstrateda2kWhigh-powercounter-pumpedall-fiberizedlaserwithoutobservationofTMI.Comparedwiththeco-pumpedscheme,theTMIthresholdisenhancedatleast50%incounter-pumpedscheme,moreover,stimulatedRamanscatteringandfour-wavemixingaresuppressedsimultaneously.

简介：目的：探究季铵型聚合物CO2解吸附过程温度和CO2浓度等变量对解吸附热力学和动力学的影响;研究空气CO2捕集供给植物增产的耦合方法,降低空气CO2捕集与利用的能耗与成本。创新点：1.基于变湿吸附技术,探究了季铵型聚合物CO2解吸附过程的热力学及动力学特性;2.获得了CO2作为气肥供给植物增产的关键影响参数;3.建立并优化了空气CO2捕集与植物利用的耦合模型。方法：1.通过CO2吸附平衡与动力学实验,获得季铵型聚合物CO2解吸附的平衡常数和动力学常数的影响参数;2.通过植物CO2吸收实验,获得CO2供给植物增产过程中CO2浓度和光照强度对吸收速率的影响;3.通过理论推导,构建解吸附CO2浓度与吸附剂质量、温度以及吹扫气流量等的关系,获得空气CO2捕集与植物增产的耦合模型并计算CO2捕集的能耗与成本。结论：1.季铵型聚合物材料吸附CO2的平衡常数随温度的升高而降低;吸附、解吸附动力学常数随温度的升高而升高。2.CO2供给植物增产的最佳浓度和光照强度为1000ppm和8000lux。3.基于优化的空气捕集与植物利用的耦合算法,CO2的捕集能耗与成本分别为35.67kJ/mol和34.68USD/t。

简介：ThreephasePebax?MH1657/PEG-ran-PPG/CuBTC（polymer/liquid/solid）wassuccessfullydepositedasaselectivelayeronaporousPolysulfone（PSF）support.Infact,thebeneficialpropertiesofPEG（highselectivity）withthoseofPPG（highpermeability,amorphous）havebeencombinedwithsuperiorpropertiesofmixedmatrixmembrane（MMMs）.ThemembraneswerecharacterizedbyDSC,TGAandSEM,whileCuBTCwascharacterizedbyCO2andCH4adsorptiontest.Statisticallybasedexperimentaldesign（centralcompositedesign,CCD）wasappliedtoanalyzeandoptimizetheeffectofPEG-ran-PPG（10–50wt%）andCuBTC（0–20wt%）masscontentsontheCO2permeanceandCO2/CH4idealselectivity.Basedontheregressioncoefficientsoftheobtainedmodels,theCO2permeancewasnotablyinfluencedbyPEG-ran-PPG,whileCuBTChasthemostsignificanteffectontheCO2/CH4idealselectivity.Undertheoptimumconditions（PEG-ran-PPG:32.76wt%andCuBTC:20wt%）,nearly620%increaseintheCO2permeanceand43%enhancementintheCO2/CH4idealselectivitywasobservedcomparedtotheneatPebax.Theeffectofpressure（3,9and15bar）onthepureandmixedgasseparationperformanceofthecompositemembraneswasalsoinvestigated.ThehighsolubilityofCO2inthemembranesresultedintheenhancementofCO2permeabilitywithincreaseingaspressure.

简介：CrystallineTiO2（P25）andisolatedtitanatespeciesinaZSM-5structure（TS-1）weremodifiedwithAuandAg,respectively,andtestedinthegas-phasephotocatalyticCO2reductionunderhighpurityconditions.Thenoblemetalmodificationwasperformedbyphotodeposition.LightabsorbancepropertiesofthecatalystsareexaminedwithUV–Visspectroscopybeforeandaftertheactivitytest.Inthegas-phasephotocatalyticCO2reduction,itwasobservedthatthecatalystswithAgnanostructuresaremoreactivethanthosewithAunanostructures.Itisthusfoundthattheenergeticdifferencebetweenthebandgapenergyofthesemiconductorandthepositionoftheplasmonisinfluencingthephotocatalyticactivity.Potentially,plasmonexcitationduetovisiblelightabsorptionresultsinplasmonresonanceenergy,whichaffectstheexcitationofthesemiconductorpositively.Therefore,anoverlapbetweenbandgapenergyofthesemiconductorandmetalplasmonisneeded.

简介：Carbondioxide（CO2）captureusingmagnesiumoxide（MgO）-basedadsorbentsatintermediatetemperatureshasbeenregardedasaveryprospectivetechnologyfortheirrelativelyhighadsorptioncapacity,lowcost,andwideavailability.Duringthepastfewyears,greatefforthasbeendevotedtothefabricationofmoltensalts-modifiedMgO-basedadsorbents.TheextraordinaryprogressachievedbycoatingwithmoltensaltsgreatlypromotestheCO2capturecapacityofMgO-basedadsorbents.Therefore,wefeelitnecessarytodeliveratimelyreviewonthistypeofCO2capturingmaterials,whichwillbenefittheresearchersworkinginbothacademicandindustrialareas.Inthiswork,weclassifiedthemoltensaltsmodifiedMgOadsorbentsintofourcategories:（1）homogenousmoltensalt-modifiedMgOadsorbents,（2）moltensalt-modifieddoublesalts-basedMgOadsorbents,（3）mixedmoltensalts-modifiedMgOadsorbents,and（4）moltensalts-modifiedMgO-basedmixedoxidesadsorbents.Thiscontributioncriticallyreviewstherecentdevelopmentsinthesyntheticmethod,adsorptioncapacity,reactionkinetics,promotionmechanism,operationalconditionsandregenerabilityofthemoltensalts-modifiedMgOCO2adsorbents.Thechallengesandprospectsinthispromisingfieldofmoltensalts-modifiedMgOCO2adsorbentsinrealapplicationsarealsobrieflymentioned.

简介：HierarchicalporousTiO2nanopillsweresynthesizedusingatitaniummetal-organicframeworkMIL-125（Ti）asprecursor.Theas-synthesizedTiO2nanopillsownedalargespecificsurfaceareaof102m2/ganduniqueporousstructure.Furthermore,theobtainedTiO2nanopillswereappliedasanodematerialsforNa-ionbatteriesforthefirsttime.Theas-synthesizedTiO2nanopillsachievedahighdischargecapacityof196.4mAh/gatacurrentdensityof0.1A/g.Adischargecapacityof115.9mAh/gwasobtainedatahighcurrentdensityof0.5A/gandthecapacityretentionwasremainedashighas90%evenafter3000cycles.Theexcellentelectrochemicalperformancecanbeattributedtoitsuniquehierarchicalporousfeature.

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简介：One-potachievementofethyllevulinatefromcassavawasconductedinethanol-watersystemoverseveralsimplesulfatesaltcatalysts.Al2（SO4）3catalysthadthebestperformanceinsynthesizingethyllevulinatecomparingwiththoseofaseriesofsulfatesalts.Thehighestyieldsofethyllevulinatewasupto39.27%aswellas7.78%levulinateacidwhencassavawascatalyzedinethanolmediumbyadding10wt%water.13Cand1HNMRspectroscopicinvestigationsconfirmedthatisomerizationofglucosetofructoseoverAl2（SO4）3catalystisanimportantstepinproducingethyllevulinateandlevulinateacid.DuetoaggregationsofAl3+underhydrothermalconditions,tinyamountofAl3+weredetectedinfiltrateatthepercentageof0.32%evenifinabsolutewater.BronstedandLewisacidscouldimprovetheyieldofethyllevulinateandlevulinateacidbysynergisticeffect.AllresultssuggestedthatA12（SO4）3wasasimpleandefficientcatalystforethyllevulinateandlevulinateacidproduction.

简介：ThemorphologyeffectofZr-dopedCeO2wasstudiedintermsoftheiractivitiesintheselectiveoxidationofstyrenetostyreneoxideusingtert-butylhydroperoxideastheoxidant.Inthepresentwork,ZrdopedCeO2nanorodsexhibitedthehighestcatalyticperformance（yieldofstyreneoxideandTOFvalue）followedbynanoparticlesandnanocubes.FortheZr-dopedCeO2nanorods,theapparentactivationenergyis56.3kJ/mol,whichismuchlowerthanthevaluesofcatalystssupportedonnanoparticlesandnanocubes（73.3and93.4kJ/mol）.Thehighresolutiontransmissionelectronmicroscopyresultsindicatedthat（100）and（110）crystalplanesarepredominantlyexposedforZr-dopedCeO2nanorodswhile（100）and（111）fornanocubes,（111）fornanoparticles.TheremarkablyincreasedcatalyticactivityoftheZrdopedCeO2nanorodsismainlyattributedtothehigherpercentageofCe3+speciesandmoreoxygenvacancies,whichareassociatedwiththeirexposed（100）and（110）crystalplanes.Furthermore,recyclingstudiesprovedthattheheterogeneousZr-dopedCeO2nanorodsdidnotloseitsinitialhighcatalyticactivityafterfivesuccessiverecycles.

简介：Wereportonbroadlywavelength-tunablepassivemode-lockingwithhighpoweroperatingatthe2μmwaterabsorptionbandinaTm:CYAcrystallaser.Withasimplequartzplate,stablemode-lockingwavelengthscanbetunedfrom1874to1973nm,withatunablewavelengthrangeupto~100nmandmaximumoutputpowerupto1.35W.Thebandwidthisnarrowas~6GHz,correspondingtoahighcoherence.Toourknowledge,thisisthefirstdemonstrationofwavelength-tunablemode-lockingwithwatt-levelinthe2μmwaterabsorptionband.Thehightemporalcoherentlasercanbefurtherappliedinspectroscopy,theefficientexcitationofmolecules,sensing,andquantumoptics.

简介：Adoubleactivecentersystem,namelySalen-Cu（Ⅱ）@MIL-101（Cr）,wassuccessfullysynthesizedviathe“shipinabottle”approach,whichactedasabifunctionalmaterialforbothcaptureandconversionofCO2inasingleprocess.Forthefirsttime,Salen-Cu（Ⅱ）@MIL-101（Cr）catalystwasdevelopedforthesynthesisofpropylenecarbonatefromCO2andpropyleneoxideunderroomtemperatureandambientpressurewithayieldof87.8%over60h.Furthermore,thereactionmechanismwasalsodiscussed.

简介：Thehighharmonicgeneration（HHG）fromtheCS2moleculeinintenselaserfieldsisinvestigatedusingtheextendedLewensteinmethod.Tileinitialstateisthehighest-occupiedmolecularorbitaloftheCS2molecule,whichcanbewelldescribedbyGaussianwavepacketusingGAMESS-UKpackage.Comparedwiththecaseoftheellipticallaser,theHHGcanbeextendedintwo-colorcircularlypolarizedlaserfield.Thetime-frequencyanalysisandclassicalelectrontrajectoryaswellastheionizationyieldcurvearealsopresentedtofurtherexplaintheunderlyingmechanism.Afteraddingastaticelectricfieldonthez-direction,thesinglequantumpathcontrolisrealizedandthesupercontinuumspectraareobtained.Moreover,anisolated110aspulsecanbeobtainedbysuperposingtheharmonicsfrom130thto1SOthorder.

简介：Theefficiencyofthepoly（3-hexylthiophene）（P3HT）and[6,6]-phenylC61-butyricacidmethylester(PC61BM)basedorganicsolarcellswasenhancedbyusing1,2,4-trichlorobenzene（TCB）asaprocessingadditivetocontroltheblendmorphology.TheadditionofTCBimprovedthearrangementofP3HTwhichresultedingoodphaseseparatedblendfilms.Correspondingly,theoptimizedsolarcellsshowedapowerconversionefficiency（PCE）of4.17%withafillfactor（FF）of0.69,whichwerehigherthanthoseofcommonthermalannealingdevices（PCE3.84%,FF0.67）.Theefficiencywasfurtherimprovedto4.74%bythermalannealingat150°Cfor10minwithahigherFFof0.74.