简介：Anovelvisiblelightactivephoto-catalystnamedCHC/C-PVA/TiO2,thecompositeoftitaniumdioxide（TiO2）withconjugatedderivativeofpolyvinylalcohol（C-PVA）loadedonacordieritehoneycombceramic（CHC）substrate,wasfabricatedbycombiningthesynthesisofTiO2sol,preparationofC-PVAviathermallytreatingpolyvinylalcohol,andimmobilizationofTiO2solandC-PVAonCHC.BydetectingthechangeofUV–visabsorptionspectraofthemodelorganicpollutant（methylorange（MO））inthepresenceofthecompositeundervisiblelightirradiation,thephoto-catalyticactivitywasevaluatedandtheresultsshowthattheCHC/C-PVA/TiO2compositehasanenhancedphoto-catalyticactivitywhencomparedtotheCHC/TiO2composite.Besides,theCHC/C-PVA/TiO2showsagoodphoto-catalyticstabilityafterthefourthcycles.Thestructureanalysesbyscanningelectronmicroscope（SEM）andenergydispersiveX-rayspectroscopy（EDS）showthecoexistenceofC-PVAandTiO2ontheCHCandthecracksonthesurfaceofCHC/C-PVA/TiO2.Resultofultraviolet-visiblediffusereflectionspectroscopy（UV–visDRS）revealsthattheCHC/C-PVA/TiO2canabsorbbothultravioletandvisiblelightwhileresultofX-rayphotoelectronspectroscopy（XPS）indicatestheexistenceofC,OandTielementsintheCHC/C-PVA/TiO2.ThetypicalstructuresaswellastheopticalcharacteristicsoftheCHC/C-PVA/TiO2areresponsiblefortheenhancementinthephoto-catalyticactivity.

简介：P-typenitrogen-dopedZnOfilmsarepreparedsuccessfullybyin-situthermaloxidationofZn_3N_2films.Thepreparedfilmsarecharacterizedbyx-raydiffraction,non-Rutherfordbackscattering(non-RBS)spectroscopy,xrayphotoelectronspectroscopy,andphotoluminescencespectrum.TheresultsshowthattheZn_3N_2filmsstarttotransformtoZnOat400°Candthetotalnitrogencontentdecreaseswiththeincreasingannealingtemperature.Thep-typefilmsareachievedat500℃withalowresistivityof6.33Ω·cmandahighholeconcentrationof+8.82×10~(17)cm~(-3),aswellasalowlevelofcarboncontamination,indicatingthatthesubstitutionalnitrogen(N_O)isaneffectiveacceptorintheZnO:Nfilm.ThephotoluminescencespectrashowclearUVemissionsandalsoindicatethepresenceofoxygenvacancy(V_O)defectsintheZnO:Nfilms.Thep-typedopingmechanismisbrieflydiscussed.

简介：Inthispaper,weinvestigatetheglobalexistenceandlongtimebehaviorofstrongsolutionsforcompressiblenematicliquidcrystalflowsinthreedimensionalwholespace.TheglobalexistenceofstrongsolutionsisobtainedbythestandardenergymethodundertheconditionthattheinitialdataareclosetotheconstantequilibriumstateinH~2-framework.IftheinitialdatasinL~1-normarefiniteadditionally,theoptimaltimedecayratesofstrongsolutionsareestablished.WiththehelpofFouriersplittingmethod,onealsoestablishesoptimaltimedecayratesforthehigherorderspatialderivativesofdirector.

简介：TypeIX-rayburstsarethemostfrequentthermonuclearexplosionsinnature,resultingfromthermonuclearrunawayonthesurfaceofanaccretingneutronstar[1].Thebreakoutreaction14O(α,p)17FfromthehotCNOcyclemayhaveaprominentimpactontheburstlightcurveandburstashes[2].However,insufficientexperimentalinformationisavailabletocalculateareliable,preciserateforthisreaction[3].Weproposedtoaddresstheexperimentalinvestigationofthe14O(α,p)17FusingTimeProjectionChamber(TPC)[4].

简介：Inthisstudy,wereportanefficientCdTe-SnO2quantumdot（QD）solarcellfabricatedbyheat-assisteddrop-castingofhydrothermallysynthesizedCdTeQDsonelectrospunSnO2nanofibers.Theas-preparedQDsandSnO2nanofiberswerecharacterizedbydynamiclightscattering（DLS）,UV–Visspectroscopy,photoluminescence（PL）spectra,X-raydiffraction（XRD）andtransmissionelectronmicroscopy（TEM）.TheSnO2nanofibersdepositedonfluorine-dopedtinoxide（SnO2）andsensitizedwiththeCdTeQDswereassembledintoasolarcellbysandwichingagainstaplatinum（Pt）counterelectrodeinpresenceofcobaltelectrolyte.TheefficiencyofcellswasinvestigatedbyanchoringQDsofvaryingsizesonSnO2.Thebestphotovoltaicperformanceofanoverallpowerconversionefficiencyof1.10%,anopen-circuitvoltage（Voc）of0.80V,andaphotocurrentdensity（JSC）of3.70mA/cm2wereobtainedforcellswithSnO2thicknessof5–6μmandcellareaof0.25cm2understandard1Sunillumination（100mW/cm2）.Theefficiencywasinvestigatedforthesamesystemsunderpolysulfideelectrolyteaswellforacomparison.

简介：AseriesofnovelN-（3-furan-2-yl-1-phenyl-1H-pyrazol-5-yl）amidesderivativesweredesignedandsynthesized.Theirstructureswereconfirmedby1HNMR,13CNMRandHRMS.Alltitlecompoundswereevaluatedfortheirherbicidalandantifungalactivities.Preliminarybioassayresultsindicatedthatthetitlecompoundsshowedgoodtomoderateherbicidalactivityat1000mg/L.Compound6qpresentedthebestactivityagainstDigitariasanguinalis（L）Scop.,AmaranthusretroflexusL.andArabidopsisthalianawithaninhibitiondegreeoffive.Compound6dalsoshowedaninhibitiondegreeoffiveagainstD.sanguinalis.Inaddition,at50mg/L,mostcompoundsexhibitedgoodinvitroantifungalactivityagainstSclerotiniasclerotiorum,withcompound6cshowingover90%antifungalactivityagainstS.sclerotiorumandPelliculariasasakii.

简介：Themassesofneutron-defcientnuclidesplayacriticalroleinthecalculationofastrophysicalrapidproton-captureprocesses[1].Neutron-defcientnuclideswithmassnumber∧around80arethelastsetofnuclideswithunknownmassesonthepathwayofvp-process[2].Themassmeasurementofnuclideswouldbeveryuseful.In2016,massesofneutron-defcientnuclides79Y,81Zr,82Zr,83Nband84Nbnucleiwerepreciselymeasureddirectlybytheexperimentalstorage-ringCSReatLanzhou.

简介：利用水热合成方法合成了2个新的苯并咪唑修饰的Keggin型多酸基化合物[（C_7H_6N_2）_3（H_3PMo_（12）O_（40））]·H_2O（1）和[KNa_2（C_7H_5N_2）_2（H_（2.5）SiW_（12）O_（40））_2]·6（C_7H_6N_2）（2）（C_7H_6N_2=苯并咪唑）.化合物1为超分子结构,化合物2为2种碱金属钾和钠与多酸配位形成链状多酸基化合物,并通过元素分析和X-射线单晶衍射方法确定了2种化合物的晶体结构.单晶结构分析表明化合物1属于三斜晶系,P-1空间群,晶胞参数a=1.1580（7）nm,b=1.3159（8）nm,c=1.8254（12）nm,α=84.418（10）°,β=88.958（10）°,γ=65.852（10）°,V=2.5255（3）nm3,Z=2;化合物2也属于三斜晶系,P-1空间群,晶胞参数a=1.3586（9）nm,b=1.4403（10）nm,c=1.8365（13）nm,α=109.509（10）°,β=90.755（10）°,γ=114.864（10）°,V=3.0236（4）nm3,Z=1.

简介：通过Cu纳米颗粒掺杂制备了Li[（Ni0.6Co0.2Mn0.2）1-xCux]O2三元正极材料,并通过调节Cu的掺杂量,讨论了Cu的掺入对Li[（Ni0.6Co0.2Mn0.2）1-xCux]O2三元正极材料晶体结构、表面形貌、电化学性能和循环性能等一系列性能的影响,铜掺杂量为x=0.01时,在0.2C倍率下的首次放电比容量达到了219.1mAh/g,经过50次充放电循环之后,剩余比容量为115.4mAh/g。最终结果为Li[（Ni0.6Co0.2Mn0.2）1-xCux]O2中Cu的掺入量为x=0.01时,所得正极材料的电化学性能和循环性能最为优异。

简介：The12C+13Csystemhasbeenstudiedextensively,becauseofthesimilarityoftheentrancechanneltotheastrophysicallyimportant12C+12Creaction[1??3].Untilnow,threedifferentmethodshavebeenexploitedtoperformthefusioncrosssectionmeasurementsfor12C+13CundertheCoulombbarrier:(1)measuringtheyieldofcharacteristicrays,(2)thetotal-rayyieldsusingNaIsummingdetectorsand(3)theactivityofthereactionresidue24Na(T1=2=15.0h).Recently,thefusioncrosssectionof12C+13Chasbeenmeasureddownto0.9nbthroughtheactivitymeasurementbyourgroup[4].Althoughthestatisticalmodelcalculationsinallthesethreemethodshavebeenroutinelyusedtoconverttheobservedpartialcrosssectionsintothetotalfusioncrosssections[5],thesystematicuncertaintyinducedbythestatisticalcorrectionshasnotbeenstudiedverywell.

简介：Thefundamentalmomentumconservationrequirementq~0fortheRamanprocessisrelaxedinthenanocrystallites(NCs),andphononsawayfromtheBrillouin-zonecenterwillbeinvolvedintheRamanscattering,whichiswell-knownasthephononconfinementeffectinNCs.ThisusuallygivesadownshiftandasymmetricbroadeningoftheRamanpeakinvariousNCs.Recently,theA'_1modeof1LMoS2NCsisfoundtoexhibitablueshiftandasymmetricbroadeningtowardthehigh-frequencyside[Chem.Soc.Rev.44(2015)2757andPhys.Rev.B91(2015)195411].Inthiswork,wecarefullycheckthisissuebystudyingRamanspectraof1LMoS2NCspreparedbytheionimplantationtechniqueinawiderangeofion-implanteddosage.ThesameconfinementcoefficientisusedforbothE'andA'_1modesin1LMoS_2NCssincethephononuncertaintyinanNCismainlydeterminedbyitsdomainsize.TheasymmetricalbroadeningneartheA′_1andE′modesisattributedtotheappearanceofdefect-activatedphononsatthezoneedgeandtheintrinsicasymmetricalbroadeningofthetwomodes,wheretheanisotropyofphonondispersioncurvesalongΓ-KandΓ-Misalsoconsidered.Thephotoluminescencespectraconfirmtheformationofsmalldomainsizeof1LMoS_2nanocrystallitesintheion-implanted1LMoS_2.Thisstudyprovidesnotonlyanapproachtoquicklyprobephonondispersiontrendsof2DmaterialsawayfromΓbytheRamanscatteringofthecorrespondingNCs,butalsoareferencetocompletelyunderstandtheconfinementeffectofdifferentmodesinvariousnanomaterials.

简介：Wehavereportedthemassmeasurementsofneutron-deficientnuclides79Y,81;82Zr,83;84Nbinthisyear’sAnnualReport.However,fortheN=ZnuclidesclosetoA=80,theyieldismuchlowerandeveniftheycanbeproduced,thereisstillgreatdifficulttoidentifythembecauseoftheirquitesimilarmass-to-chargeratioandrevolutiontimes.However,theirmassareextremelyimportantforrapidprotoncaptureprocess,forexample,80Zrand84Moarewaitingpointsofrp-process.Theirmassescangreatlyeffectthereactionflowofprotoncaptureonthemandthentheabundanceoftheheaviernuclides.Inaddition,theseparationenergyof84Mo(determinedbythemassof80Zrand84Mo)hasastrongimpactonthe83Nb(p,α)reactionrateandplaysakeyroleintheformationofZr-NbFig.

简介：Afacilestep-by-stepapproachisdevelopedforsynthesizingthehigh-efficiencyandmagneticrecyclableFe_3O_4@SiO_2@Ag@Nitrepang-likenanocomposites.ThismethodinvolvescoatingFe_2O_3nanorodswithauniformsilicalayer,reductionin10%H_2/AratmospheretotransformtheFe_2O_3intomagneticFe_3O_4,andfinallydepositingAg@Nicore-shellnanoparticlesontheL-lysinemodifiedsurfaceofFe_3O_4@SiO_2nanorods.Thefabricatednanocompositesarefurthercharacterizedbyx-raydiffraction,transmissionelectronmicroscopy,scanningelectronmicroscope,Fouriertransforminfraredspectroscopy,andinductivelycoupledplasmamassspectroscopy.TheFe_3O_4@SiO_2@Ag@Nitrepang-likenanocompositesexhibitremarkablyhighercatalyticefficiencythanmonometallicFe_3O_4@SiO_2@AgnanocompositestowardthedegradationofRhodamineB(RhB)atroomtemperature,andmaintainsuperiorcatalyticactivityevenaftersixcycles.Inaddition,thesesamplescouldbeeasilyseparatedfromthecatalyticsystembyanexternalmagnetandreused,whichshowsgreatpotentialapplicationsintreatingwastewater.

简介：High-performancethin-filmtransistors(TFTs)withalowthermalbudgetarehighlydesiredforflexibleelectronicapplications.Inthiswork,theTFTswithatomiclayerdepositedZnO-channel/Al_2O_3-dielectricarefabricatedunderthemaximumprocesstemperatureof200℃.First,weinvestigatetheeffectofpost-annealingenvironmentsuchasN_2,H_2-N_2(4%)andO_2onthedeviceperformance,revealingthatO_2annealingcangreatlyenhancethedeviceperformance.Further,wecomparetheinfluencesofannealingtemperatureandtimeonthedeviceperformance.Itisfoundthatlongannealingat200℃isequivalenttoandevenoutperformsshortannealingat300℃.ExcellentelectricalcharacteristicsoftheTFTsaredemonstratedafterO_2annealingat200℃for35min,includingalowoff-currentof2.3×10~(-13)A,asmallsub-thresholdswingof245mV/dec,alargeon/offcurrentratioof7.6×10~8,andahighelectroneffectivemobilityof22.1cm~2/V·s.Undernegativegatebiasstressat—10V,theabovedevicesshowbetterelectricalstabilitiesthanthosepost-annealedat300℃.Thusthefabricatedhigh-performanceZnOTFTwithalowthermalbudgetisverypromisingforflexibleelectronicapplications.

简介：

简介：Toconsidertheanisotropicdamageinfatigue,animprovedboom-panelmodelispresentedtosimulatearepresentativevolumeelement(RVE)intheframeworkofcontinuumdamagemechanics.TheanisotropicdamagestateoftheRVEisdescribedbythecontinuityextentsofboomsandpanels,whosedamageevolutionsareassumedtobeisotropic.Thenumericalimplementationisproposedonthebasisofdamagemechanicsandthefiniteelementmethod.Finally,theapproachisappliedtothefatiguelifepredictionof2A12-T4aluminiumalloyspecimenundercyclicloadingoftension-torsion.Theresultsindicateagoodagreementwiththeexperimentaldata.

简介：采用噻吩-2-甲醛分别与邻氨基苯硫酚和硫代氨基脲合成了2种噻吩-2-甲醛杂环席夫碱.利用红外光谱、紫外-可见光谱、荧光光谱、X-射线单晶衍射分析、热重分析和核磁共振氢谱等检测方法对2种目标新型杂环类席夫碱产物的结构和性质进行了表征与分析.采用量子化学中常用的密度泛函方法（DFT）对2种新席夫碱化合物进行几何优化,采用单激发组态相互作用（CIS）和含时密度泛函方法（TD-DFT）进一步优化,比较计算光谱与实际测试光谱之间的误差,探究了2种席夫碱化合物荧光发光机制,为这类席夫碱分子结构设计提供了理论依据.

简介：P2P网络贷款的兴起为个人和小微企业带来了诸多的融资便利．但由于P2P网络贷款市场上存在着信息不对称的问题，导致市场上出现了诸多乱象．本文针对P2P行业信息不对称的现状，以P2P网络贷款平台和借款者作为参与者，构建了不完全信息博弈模型．该模型以实现P2P市场上的帕累托最优为研究目的，并分别探讨了在混合均衡和准分离均衡两种不同情况下，各自达到帕累托最优状态所需的市场条件，以及相关影响因素，并据此提出了相应的政策建议．

简介：采用UMP2/6-311＋G（3df）方法研究了一系列化合物M_（n＋1）F_n（n=1,2;M=Na,K）体系的几何构型及非线性光学性质（NLO）.结果表明：这些体系均为超价化合物,均拥有较大的第一超极化率（β_0）.尤其是Na_3F_2体系中结构2c的β_0值为29.16×10~（-49）C~3·m~3·J~（-2）,是已知超价化合物Li_3F_2的2c结构的β_0值2.22×10~（-49）C~3·m~3·J~（-2）的13.1倍.

简介：