英文——纳米表面涂层技术.docx

Surface&CoatingsTechnology203(2009)2458–2462ContentslistsavailableatScienceDirectSurface&CoatingsTechnologyjournalhomepage:www.elsevier.com/locate/surfcoatNanometer-scalesurfacemodificationofKBr(001)singlecrystalbyArionbombardmentO.P.Sinha1,S.R.Saeed2,F.Krok,M.Szymonski⁎ResearchCenterforNanometer-ScaleandAdvancedMaterials(NANOSAM),FacultyofPhysics,AstronomyandAppliedComputerScience,JagiellonianUniversity,ul.Reymonta4,30-059Krakow,PolandarticleinfoabstractAvailableonline5March2009Keywords:SurfacemodificationSurfacepatterningIonirradiationRipplesElectronicdesorptionAlkalihalidesAtomicforcemicroscopyMorphologicaldevelopmentonalkalihalidecrystalsurfaces,underionirradiation,hasbeeninvestigatedbymeansofAtomicForceMicroscopyinUHVconditions.TheKBr(001)surfacehasbeenexposedtoAr+beamwithvaryingincidentangles(from5°to75°off-normal)andenergies(from1.0to5.0keV).Differentkindsofnanostructures,dependingonionincidentangle,havebeenobservedontheirradiatedsurfacessuchasnanocavities,ornanoringsandnanodots,preferentiallyforclosetonormalincidence,andripplesfortheobliqueincidence.TheformationofripplestructuresonKBrsurfacesasafunctionoftheincidenceangleandenergyhasalsobeenobserved.Theorientationoftherippleshasbeenfoundtobeincidentangledependentanditisperpendicular,orparalleltotheionbeamprojectionontheirradiatedsurfaceforanglesof30°and75°,respectively.Moreover,ithasbeenobservedthatthewavelengthoftheripplesalsodependsonenergyoftheprojectileions.TheAFMimagesacquiredwithatomicresolutionrevealwellordered,crystallinestructureoftheripplesevenafterbombardmentwithhighfluence.Theresultshavebeendiscussedintermsofelectronicandballisticprocessesofsputteringandexistingtheoriesforsurfacemodifications.©2009ElsevierB.V.Allrightsreserved.1.IntroductionThefabricationofnanoscalesurfacestructuressuchasripples,nanorods,quantumdotsandwireshaveattractedconsiderableattentionduetotheirtechnologicalapplicationsinopticalandelectronicdevices[1].Yet,thenanostructuresobtainedinvarious-assembledwayshaveasizedistributionwider