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简介：AUltrafineamorphousNiBalloywaspreparedviachemicalreductionmethod;ItsstructuresduringthecrystallizatioinprecesswascharacterizedbysuchtechniquesasDifferentialthermalanalysis(DTA),X-rayabsorptionfinestructure(XAFS)andX-raydiffraction(XRD),andcorrelatedtothecatalyticpropertiesforbenzenehydrogenation.ItwasfoundthatthecrystallizationofamorphousNiBalloywascarriedoutintwosteps,asindicatedbytwoexothermicpeakscenteredat598and652Krespectively.Duringthefirststep.twometastablecrystallinephases,i.e.,Ni3BandanoaocrstallineNiphase(Ni-richNiBalloy),wereformed.Furtherannealingathighertemperatureof652KmayresultinthedecompositionofcrystallineNi3BandaggregationofnanocrystallineNi,thebenzenehydrogenationisoptimizedaroundtheannealingtemperatureof623K.ItmostprobablyresultsfromthemaximumamountofactivesiteonnanocrystallineNiformedbythermaltreatmentatappropriateannealingtemperature.

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简介：Tetrahedralamorphoushydrogenatedcarbon(ta-C:H)filmsonSi(lO0)substrateswerepreparedbyusingamagnetic-field-filterplasmastreamdepositionsystem.Sampleswithdifferentratiosofsp^3-bondtosp^2-bondwereobtainedbychangingthebiasvoltageappliedtothesubstrates.Theellipsometricspectraofvariouscarbonfilmsinthephotonenergyrangeof1.9-5.4eVweremeasured.Therefractiveindexnandtherelativesp^3CratioofthesefilmswereobtainedbysimulatingtheirellipsometricspectrausingtheForouhi-BloomermodelandbyusingtheBruggemaneffectivemediumapproximation,respectively.Thehaemocompatibilityoftheseta-C:Hfilmswasanalysedbyobservationofplateletadhesionandmeasurementofkineticclottingtime.Theresultsshowthatthesp^3Cfractionisdependentonthesubstratebiasvoltage,andthehaemocompatibilityisdependentontheratioofsp^3-bondtosp^2-bond.Agoodhaemocompatibilitymaterialofta-C:Hfilmswithasuitablesp^3Cfractioncanbepreparedbychangingthesubstratebiasvoltage.

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简介：Wepresentintegrated-opticbuildingblocksandfunctionalphotonicdevicesbasedonamorphoussiliconon-insulatortechnology.Efficientdeep-etchedfiber-to-chipgratingcouplers,low-losssingle-modephotonicwirewaveguides,andcompactpowersplittersarepresented.Basedonthesub-μmphotonicwires,2×2Mach–Zehnderinterferometersandadd/dropmicroringresonators(MRRs)withlowdevicefootprintsandhighfinesseupto200wererealizedandstudied.Compactpolarizationrotatorsandsplitterswith≥10dBpolarizationextinctionratiowerefabricatedforthepolarizationmanagementon-chip.Thetuningandtrimmingcapabilitiesofthematerialplatformaredemonstratedwithefficientmicroheatersandapermanentdevicetrimmingmethod,whichenabledtherealizationofenergy-efficientphotoniccircuits.Wavelengthmultiplexersintheformofcascadedfilterbanksand4×4routersbasedonMRRswitchesarepresented.Fabricationimperfectionswereanalyzedandpermanentlycorrectedbyanaccuratelaser-trimmingmethod,thusenablingeight-channelmultiplexerswithrecordlowmetricsofsub-mWstaticpowerconsumptionand≤1°Ctemperatureoverhead.Thehighqualityofthefunctionaldevices,thehightuningefficiency,andtheexcellenttrimmingcapabilitiesdemonstratethepotentialtorealizelow-cost,denselyintegrated,andultralow-power3D-stackedphotoniccircuitsontopofCMOSmicroelectronics.

简介：非结晶的Na的结晶化被使用分子的动力学方法模仿，并且原子簇的进化被我们以前建议了的簇类型索引方法(CTIM)跟踪。结晶化过程展出成核的三个不同阶段，这被表明，原子核的随后的生长并且水晶谷物变粗。尺寸和簇的内部结构在决定它是否是一个原子核起关键作用。跟踪分析的簇能比另外的方法更清楚地并且精确地识别不同结晶化阶段。同时，模拟结果能为以前获得的试验性的现象在原子水平提供合理解释。

简介：在不同温度的非结晶的CuHf合金的结构的因素由使用高温度X光衍射计的redetermined。theshort范围顺序结构而且中等范围的顺序结构在非结晶的CuHfalloys存在，这被发现不仅。合金融化的CuHf的动态粘性被扭力的摆动粘度计测量。脆弱过热CuHf合金融化基于粘性数据被计算。形成CuHf的能力的玻璃是的试验性的结果表演仔细与脆弱有关他们的超级加热融化。在中等范围顺序结构和脆弱之间的关系过热融化也在非结晶的CuHfalloys被建立了。与supercooled液体的脆弱相对照，过热的液体的脆弱答应一条更好的途径到反映形成液体的玻璃的动力学。

简介：内在的hydrogenated非结晶的硅(a-Si:H)电影在n类型上被扔由到分析的热电线的化学蒸汽免职(HWCVD)的水晶的硅(c-Si)晶片非结晶/水晶的heterointerface钝化性质。对称的heterostructure的少数搬运人一生被使用请教WCT-120一生测试者系统，和决定从一生测量的接口状态密度被建议的一个简单方法的Sinton测量。接口状态密度测量被使用深水平的短暂光谱学(DLTS)证明简单方法的有效性也执行。微观结构和a-Si的氢结合配置:有不同的氢冲淡的H电影被使用分光镜的ellipsometry(SE)和Fourier变换调查红外线的光谱学(FTIR)分别地。接口状态密度的更低的值被使用a-Si获得:有水晶的硅上的更一致的、紧缩的微观结构和更少体积缺点的H电影由HWCVD扔了。

简介：WedemonstrateafacilerouteforthemassiveproductionofSnCb/carbonnanocompositeusedashigh-capacityanodematerialsofnextgenerationlithium-ionbatteries.ThenanocompositehadauniquestructureofultrafineSnO2nanocrystals（5nm,80wt%）homogeneouslydispersedinamorphouscarbonmatrix.ThisstructuredesigncanwellaccommodatethevolumechangeofLi+insertion/desertioninSnO2,andpreventtheaggregationofthenanosizedactivematerialsduringcycling,leadingtosuperiorcycleperformancewithstablereversiblecapacityof400mAh/gatahighcurrentrateof3.3A/g.

简介：Theglass-formingability(GFA)andmagneticpropertiesoftheGd_(50)Coso-basedamorphousaiioywithAladditionsubstitutionforCoareinvestigated.ItisfoundthattheGFAandmagneto-caloriceffectoftheGd_(50)Co_(45)Al_5amorphousaiioyarebetterthanGd_(50)Co_(50)amorphousalloy.Themaximummagneticentropychange(-△S_m~(peak))andthemagneticrefrigerantcapacityoftheamorphousalloyunderafieldof5Tareabout6.64J·kg~(-1)K~(-1)and764J·kg~(-1),respectively.Thefielddependenceofmagneticentropychangemeetstheonepredictedbythemeanfieldtheory,whichisinvestigatedforabetterunderstandingofthemagneto-caloricbehaviorsoftheGd_(50)Co_(45)Al_5amorphousalloy.

简介：Inthiswork,amethodbasedonscanningKelvinprobemicroscopyisproposedtoseparatelyextractsource/drain(S/D)seriesresistanceinoperatingamorphousindium–gallium–zinc–oxide(a-IGZO)thin-filmtransistors.TheasymmetrybehaviorofS/Dcontactresistanceisdeducedandtheunderlyingphysicsisdiscussed.ThepresentresultssuggestthattheasymmetryofS/DcontactresistanceiscausedbythedifferenceinbiasconditionsoftheSchottky-likejunctionatthecontactinterfaceinducedbytheparasiticreactionbetweencontactmetalanda-IGZO.Theoverallcontactresistanceshouldbedeterminedbyboththebulkchannelresistanceofthecontactregionandtheinterfacepropertiesofthemetalsemiconductorjunction.

简介：Wedemonstratelow-losshydrogenatedamorphoussilicon(a-Si:H)waveguidesbyhot-wirechemicalvapordeposition(HWCVD).Theeffectofhydrogenationina-SiatdifferentdepositiontemperatureshasbeeninvestigatedandanalyzedbyRamanspectroscopy.Weobtainedanopticalqualitya-Si:Hwaveguidedepositedat230°CthathasastrongRamanpeakshiftat480cm-1,peakwidth(fullwidthathalf-maximum)of68.9cm-1,andbondangledeviationof8.98°.Opticaltransmissionmeasurementshowsalowpropagationlossof0.8dB/cmatthe1550nmwavelength,whichisthefirst,toourknowledge,reportforaHWCVDa-Si:Hwaveguide.

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简介：Amorphouscarbonandgrapheneco-modifiedLiFePO4nanocompositehasbeensynthesizedviaafacilepolyolprocessinconnectionwithafollowingthermaltreatment.Variouscharacterizationtechniques,includingXRD.Mossbauerspectra,Ramanspectra,SEM,TEM,BET,O2-TPO,galvanocharge-discharge,CVandEISwereappliedtoinvestigatethephasecomposition,carboncontent,morphologicalstructureandelectrochemicalperformanceofthesynthesizedsamples.TheeffectofintroducingwayofcarbonsourcesonthepropertiesandperformanceofLiFePO4/C/graphenecompositewaspaidspecialattention.Underoptimizedsyntheticconditions,highlycrystalizedolivine-typeLiFePO4wassuccessfullyobtainedwithelectronconductiveFe2PandFePasthemainimpurityphases.SEMandTEManalysesdemonstratedthegraphenesheetswererandomlydistributedinsidethesampletocreateanopenstructuredLiFePO4withrespecttographene,whiletheglucosederivedcarbonmainlycoatedoverLiFeP04particleswhicheffectivelyconnectedthegraphenesheetsandLiFePO4particlestoresultinamoreefficientchargetransferprocess.Asaresult,favorableelectrochemicalperformancewasachieved.Theperformanceoftheamorphouscarbon-grapheneco-modifiedLiFePO4wasfurtherprogressivelyimproveduponcyclinginthefirst200cyclestoreachareversiblespecificcapacityashighas97mAh·g-1at10Crate.