资源描述：
《Evaporation of Droplets on Superhydrophobic Surfaces》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、weekendingPRL109,116101(2012)PHYSICALREVIEWLETTERS14SEPTEMBER2012EvaporationofDropletsonSuperhydrophobicSurfaces:SurfaceRoughnessandSmallDropletSizeEffects1211113XuemeiChen,RuiyuanMa,JintaoLi,ChongleiHao,WeiGuo,B.L.Luk,ShuaiChengLi,ShuhuaiYao,2andZuankaiWang1,*1DepartmentofMechanicalan
2、dBiomedicalEngineering,CityUniversityofHongKong,HongKong999077,China2DepartmentofMechanicalEngineering,TheHongKongUniversityofScienceandTechnology,HongKong999077,China3DepartmentofComputerScience,CityUniversityofHongKong,HongKong999077,China(Received10January2012;revisedmanuscriptrecei
3、ved20July2012;published10September2012;publishererrorcorrected12September2012)Evaporationofasessiledropletisacomplex,nonequilibriumphenomenon.Althoughevaporatingdropletsuponsuperhydrophobicsurfaceshavebeenknowntoexhibitdistinctiveevaporationmodessuchasaconstantcontactline(CCL),aconstan
4、tcontactangle(CCA),orboth,ourfundamentalunderstandingoftheeffectsofsurfaceroughnessonthewettingtransitionremainselusive.WeshowthattheonsettimefortheCCL-CCAtransitionandthecriticalbasesizeattheCassie-Wenzeltransitionexhibitremarkabledependenceonthesurfaceroughness.Throughglobalinterfaci
5、alenergyanalysiswerevealthat,whenthesizeoftheevaporatingdropletbecomescomparabletothesurfaceroughness,thelinetensionatthetriplelinebecomesimportantinthepredictionofthecriticalbasesize.Last,weshowthatboththeCCLevaporationmodeandtheCassie-Wenzeltransitioncanbeeffectivelyinhibitedbyengine
6、eringasurfacewithhierarchicalroughness.DOI:10.1103/PhysRevLett.109.116101PACSnumbers:68.08.Bc,68.03.FgUnderstandingandcontrollingthedropletcontactlinesurfacesaredenotedasm10,m20,andm40,respectively.dynamicsontexturedsurfaces,especiallysuperhydropho-Thediameter(D)andheight(H)ofpillarsof
7、allthreebicsurfaces,isofcriticalimportanceforawiderangeofsurfacesaresetas20and80m,respectively.Alltheseapplicationsincludingself-cleaning,dragreduction,watersurfaceswerefabricatedbyusingstandardmicrofabrica-harvest,anticorrosion,thermalmanagement,andbiosens-tionprocessesincludingpho
