简介:Amodificationofthetransitionstatetheoryforevaporationandcondensationispresentedbyanalysingthekineticcharacteristicsofliquid-vapourinterphasetransport.Inthemodifiedtransitionstatetheory,themovingorientationofmoleculesisintroducedintothecalculationofthefreevolumeoftheactivatedcomplex.Thecondensationcoefficientsofargonatdifferenttemperaturesarecalculatedwiththemodifiedtransitionstatetheory.Theresultsagreewellwiththosefrommoleculardynamicssimulations.
简介:Thevolumeexpansionofthestuff(e.g.tobaccostem)isofgreatimportancetoanincreaseintheproductqualityandadecreaseintheproductioncost.Thispaterputsforwardthebasicconfigurationandtheexpansionmechanismofanewtypeofjetpressurizationevaporationexpansionapparatur.Bythethermodynamiccalculationoftheapparatus,wegivevariationsinsteampressureonvariouscrosssectionsoftheflowsystemfortheapparatus,manufactureasamplemachine,andfinishruntestsofthemachine.Thetestresultsshowthattheapparatusmaymaketherelativeincreaseinfillvalueoftobaccostemhigherthan75%,andmaycausethesteamconsumptionrequiredintheexpansionprocessofeachkilogramstemtoreducedabout40%comparedwithconventionalexpansionapparatus.Additionally,theconfigurationoftheapparatusissimpleandsmall,itscostofmanufactureisverylow,andbothitsoperationandmaintenanceareextremelyconvenient.
简介:Molybdenumoxidenanostructuredthinfilmsweregrownonfluorinedopedtinoxide(FTO),indiumdopedtinoxide(ITO)andordinaryglasssubstratesbythermalevaporationprocesswithoutvacuumandcatalystsusingmolybdenumtrioxide(MoO3)powderasasourcematerialandoxygenasacarriergas.Variousmorphologiesincludingnanobelts,disksandhexagonalrod-likenanostructureswereobtainedbychangingthesourceandsubstratetemperaturesduringthegrowthofMoO3thinfilms.Structuralparameters,morphology,compositionandsurfacefeaturesofthefilmswerecharacterizedbyXRD,SEM,EDAX,XPS,AFMandRamanspectroscopy.Thefilmswereorthorhombicinstructurewithpreferredorientationalong(010)plane.Morphologyanalysisrevealsrandomlyalignednanobeltswith40nminthicknessandawidthof800nmand3–12mminlength.Thediskshave1.5μmdiameters,1μmthicknessandhexagonalrod-likenanostructureswithalength,breathandwidthof2μm,1μmand100nmareformed.ThesampleswereinvestigatedunderdarkandphotocurrentconditionsinH2SO4aqueoussolutionasafunctionofappliedpotential.ThephotocurrentdensityofsamplespreparedonITOandFTOsubstratesampleswerecomparedandtheresultsarediscussed.
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简介:水晶的Au5Si2/Si异质接面nanowires(Au5Si2/SiNWs)被热蒸发的SiO粉末在一个低真空系统在厚黄金涂的硅底层上获得。生产Au5Si2/Si异质接面的结构分析被采用一台传播电子显微镜(TEM)和一个选择区域执行电的衍射计。化学作文被纳入TEM的一个精力散的X光分光镜学习。一个二拍子的圆舞生长模型被建议描述Au5Si2/SiNWs的形成。在第一步期间,水晶的SiNWs经由在相对高的温度把帮助氧化物的生长过程与vapour-liquid-solid模型相结合的生长机制被形成。在第二步,preformedSiNWs的温度减少和减少片断与残余Au反应由一个solid-liquid-solid过程形成单个水晶的Au5Si2nanowires。现在的工作应该基于nanowires为未来合成和高质量的金silicidenanowires和微电子设备的研究是有用的。
简介:EvaporationofIntermediate-massFragmentsfromHot-nucleiProducedby25MeV/u40ArBombarding159TbTarget¥JiangDongxing;...