简介：ThegatedielectricthicknessdecreasesdramaticallywiththecontinuousscalingofMOSdevices,whichhasseriousconsequencesontheleakagecurrentandthepowerconsumptionoftheSiO2-basedMOSdevices.Hafniumdioxide(HfO2),asakindofhigh-kmaterial,arerecognizedasalternativestoSiO2forfutureadvancedgatedevicesandspaceapplications[1].Radiation-inducedeffectsonconventionalSiO2dielectricshavebeeninvestigated.Now,anenormousamountofeffortwasrequiredtoadaptthenewhigh-ksystemsforradiationhardapplication.

简介：PlanarringresonatorwaveguidesarefabricatedinthinfilmsofAs2S3chalcogenideglass,depositedonsilicaon-siliconsubstrates.WaveguidecoresaredirectlywrittenbyscanningthefocusedilluminationofafemtosecondTi:sapphirelaseratacentralwavelengthof810nm,throughatwo-photonphoto-darkeningprocess.Alargephotoinducedindexchangeof0.3–0.4refractiveindexunitsisobtained.Theradiusoftheringresonatoris1.9mm,correspondingtoatransmissionfreespectralrangeof9.1GHz.Ahighloaded（intrinsic）Qvalueof110,000（180,000）isachieved.Thethermaldependenceoftheresonatortransferfunctionischaracterized.Theresultsprovidethefirstreport,tothebestofourknowledge,ofdirectlywrittenhigh-Qringresonatorsinchalcogenideglassfilms,anddemonstratethepotentialofthissimpletechniquetowardsthefabricationofplanarlightguidecircuitsinthesematerials.

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简介：最近，大努力在任意的弄歪的设备的制造被作了满足便携、小的电子产品的要求。当它是一个很挑战性的工作时，灵活底层上的高水晶的优秀电影的直接生长是最理想的方法与当前的半导体设备由于简单、兼容的准备技术的优点制作灵活设备，并且通常非结晶、多晶或不连续的单个水晶的电影被完成。这里，我们表明高质量的双性人2Te3单身者由修改的热墙取向附生技术的灵活polyimide底层上的水晶的电影。试验性的结果表明邻近的雏晶协调地被联合形成一部连续电影，尽管迷惑的雏晶的数量由于快生长率被产生。由把一个石英过滤器插入到生长试管，迷惑的雏晶的数字密度有效地由于改进螺线相互作用被减少。而且，灵活双性人2Te3光电导体被制作并且在弯曲的不同的度下面展出强壮的在红外线附近的光导的反应，它也证实对电子应用合适的获得的灵活电影。

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简介：Aseriesofamine-basedadsorbentsweresynthesizedusingsiliceousMCM-41individuallyimpregnatedwithfourdifferentamines(ethylenediamine(EDA),diethylenetriamine(DETA),tetraethylenepentamine(TEPA)andpentaethylenehexamine(PEHA))tostudytheeffectofaminechainlengthandloadingweightontheirCO2adsorptionperformancesindetail.TheadsorbentswerecharacterizedbyFT-IR,elementalanalysis,andthermo-gravimetricanalysistoconfirmtheirstructureproperties.Thermo-gravimetricanalysiswasalsousedtoevaluatetheCO2adsorptionperformanceofadsorbents.Longerchainamine-basedmaterialscanachievehigheramineloadingsandshowbetterthermalstability.TheCO2adsorptioncapacitiesatdifferenttemperaturesindicatethattheCO2adsorptionisthermodynamicallycontrolledoverEDAMCM41andDETA-MCM41,whiletheadsorptionoverTEPA-MCM41andPEHA-MCM41isunderkineticcontrolatlowtemperature.ThechainlengthofaminesaffectstheCO2adsorptionperformanceandtheadsorptionmechanismsignificantly.TheresultsalsoindicatethatCO2adsorptioncapacitycanbeenhanceddespiteofhighoperationtemperatures,ifappropriateamines(TEPAandPEHA)areapplied.However,adsorbentswithshortchainamineexhibithigheradsorptionanddesorptionratesduetothecollaborativeeffectofrapidreactionmechanismsofprimaryaminesandlessdiffusionresistanceofshorterchainlengthamines.

简介：Fourkeyreactions,12C(,)13O,13C(,n)16O,25Mg(p,)26Aland19F(p,)16O,willbestudiedforthefirsttimewithinorneartheastrophysicalrelevantenergyregions(Gamowwindow)atJinpingUndergroundlaboratoryforNuclearAstrophysics(JUNA)[1],whichwilltaketheadvantageoftheultra-lowbackgroundofChinaJinPingundergroundLaboratory(CJPL),highcurrentacceleratorbasedonECRsourceandahighlysensitivedetectionsystem.

简介：TheroleoftemperatureontheoxidationdynamicsofCu2OonZnO(0001)wasinvestigatedduringtheoxidationofCu(111)/ZnO(0001)byusingoxygenplasmaastheoxidant.AtransitionfromsinglecrystallineCu2O(111)orientationtomicro-zonephaseseparationwithmultipleorientationswasrevealedwhentheoxidationtemperatureincreasedabove300°C.TheexperimentalresultsclearlyshowtheeffectoftheoxidationtemperaturewiththeassistanceofoxygenplasmaonchangingthemorphologyofCu(111)filmandenhancingthelateralnucleationandmigrationabilitiesofcuprousoxides.Averticaltop-downoxidationmodeandalateralmigrationmodelwereproposedtoexplainthedifferentnucleationandgrowthdynamicsofthetemperature-dependentoxidationprocessintheoxidationofCu(111)/ZnO(0001).

简介：TheeffectsofTiO2onsinteringandnonlinearelectricalpropertiesof（98.5-x）ZnO–0.5MnO2–0.5Co2O3-0.5Bi2O3–xTiO2（x=0.3,0.5,0.7,0.9mol%）ceramicvaristorspreparedbytheceramictechniqueareinvestigatedinthiswork.Theoptimumsinteringtemperatureofthepreparedsamplesisdeducedbydeterminingthefiringshrinkageandwaterabsorptionpercentages.Theoptimumsinteringtemperatureisfoundtobe1200℃,atwhicheachofthesamplesshowsamaximumfiringshrinkageandminimumwaterabsorption.Alsominimumwaterabsorptionappearsinasampleofx=0.9mol%.HighersinteringtemperatureandlongersinteringtimegiverisetoareductioninbulkdensityduetotheincreasedamountofporositybetweenthelargegrainsofZnOresultingfromtherapidgraingrowthinducedbytheliquidphasesintering.ThecrystalsizeofZnOdecreaseswithincreasingTiO2doping.TheadditionofTiO2improvesthenonlinearcoefficientandattainsitsmaximumvalueatx=0.7mol%ofTiO2,furtheradditionnegativelyaffectsit.Adecreaseincapacitanceconsequentlyinthedielectricconstantisrecordedwithincreasingthefrequencyinarangeof30kHz–200kHz.ThetemperatureandcompositiondependencesofthedielectricconstantandACconductivityarealsostudied.Theincreaseoftemperatureraisesthedielectricconstantbecauseitincreasesionicresponsetothefieldatanyparticularfrequency.

简介：采用TEA-CO2差分吸收激光雷达进行探测，是建立在气体组分对某些波长激光选择性吸收的基础上的，物质对波长的选择性吸收主要是由原子、分子内部能级的固有特性所决定的，进行探测时的技术难点在于种子源连续波导激光器频率稳定性的实现，也即是外差信号的高稳频技术，因为激光的频率稳定度将影响相干探测的混频效率，并在混频时产生相位噪声，降低系统的信噪比，直接影响探测灵敏度，因此激光雷达在信号发出到返回的时间内的频率稳定度是至关重要的。

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

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简介：PhotoelectrochemicalandelectrochemicalreductionofCO2intoorganicchemicalsispromisingfordirectlyorindirectlytransformingsolarenergyintochemicalenergyforfurtherutilization.However,researchontheelectroactivespeciesintheseprocesseshasbeenratherlimited.Inthiswork,weinvestigatedpossibleelectroactivespecies（CO2orHCO3–）involvedintheelectrochemicalreductionofKHCO3atelevatedtemperatureswithoutCO2bubbling.TheresultsshowedthatCO,CH4,andC2H4wereproducedafterelectrochemicalreductionof3.0mol/LKHCO3atelevatedtemperatureonaCuelectrodeevenwithoutCO2bubbling,althoughtheirfaradaicefficiencieswerelow（<6%）.MeasurementsforCO2generationfromthedecompositionofHCO3–showedthatelevatedtemperatureandhighHCO3–concentrationstronglypromotedthisprocess.Theseresultssuggestedthatthein-situproducedCO2fromthedecompositionofHCO3–wasprobablytheelectroactivespeciesintheelectrochemicalreductionofHCO3–withoutCO2bubbling.ChangesoftheGibbsfreeenergy,rateconstant,andactivationenergyofthedecompositionofHCO3–intoCO2werealsoinvestigatedandcalculatedfromtheexperimentaldata.

简介：Two-dimensionalatomic-layeredmaterialisarecentresearchfocus,andsinglelayerTa2O5usedasgatedielectricinfield-effecttransistorsisobtainedviaassembliesofTa2O5nanosheets.However,theelectricalperformanceisseriouslyaffectedbyelectronicdefectsexistinginTa2O5.Therefore,spectroscopicellipsometryisusedtocalculatethetransitionenergiesandcorrespondingprobabilitiesfortwodifferentchargedoxygenvacancies,whoseexistenceisrevealedbyx-rayphotoelectronspectroscopyanalysis.SpectroscopicellipsometryfittingalsocalculatesthethicknessofsinglelayerTa2O5,exhibitinggoodagreementwithatomicforcemicroscopymeasurement.NondestructiveandnoncontactspectroscopicellipsometryisappropriatefordetectingtheelectricaldefectslevelofsinglelayerTa2O5.

简介：Theregionaroundthedouble-closedshellnucleus208Pbhasbeenparticularlyusefulinstudyingresidualinteractions.ThelowspinisomersoftheisotopesintheN=127,Z=8387regionhavebeenidentifiedinlastfiftyyearsexcept213Rn[1??4].Inourrecentimplantation–r-acorrelationstudyoftheisotopesaroundtheN=126shellclosure,anewrayisobservedbetweentheimplantationsandthedecaysof213Rn,whichcouldbeduetothedepopulationoftheisomerof213Rnmentionedabove.

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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。

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简介：Ta2O5电影被常规电子横梁蒸发方法在熔化硅石底层上扔。由在不同温度退火，非结晶、六角形、斜方晶的阶段的Ta2O5电影被获得并且由X光证实衍射计(XRD)结果。X光检查光电子光谱学(XPS)分析证明所有这些电影的化学作文是stoichiometry。非结晶的Ta2O5电影完成最高的激光，这被发现在355或1064nm的导致的损坏阀值(LIDT)任何一个，由六角形的阶段和最后斜方晶的阶段列在后面。当前者显示出一个一致熔化区域，当后者在至少一个缺点点上被集中时，在355和1064nm的损坏形态学是不同的，它被不同损坏机制导致。在1064nm的LIDT的减少被归因于增加结构的缺点，当时在355nm由于增加的联合效果结构的缺点和减少的乐队差距精力。[从作者抽象]