6533b85ffe1ef96bd12c1145
RESEARCH PRODUCT
Formation and Evolution of Nanoscale Metal Structures on ITO Surface by Nanosecond Laser Irradiations of Thin Au and Ag Films
Isodiana CrupiE. CarriaE. CarriaFrancesco RuffinoFrancesca De SimoneFrancesca De SimoneMaria Grazia GrimaldiMaria Grazia GrimaldiSalimeh KimiagarSalimeh Kimiagarsubject
NanoclusterMaterials scienceNanosecond laser irradiationScanning electron microscopeITO; Laser; Au; AgLaserNanoparticleNanotechnologyAgSettore ING-INF/01 - ElettronicaMolecular physicsFluenceSettore FIS/03 - Fisica Della MateriaMetalAtomic force microscopyAuGeneral Materials ScienceDewettingNanostructuringNanoscopic scaleBreakupvisual_artvisual_art.visual_art_mediumGoldNanosecond laserITOdescription
The effect of nanosecond laser irradiations on 5 nm thick sputter-deposited Au and Ag films on Indium-Tin-Oxide surface is investigated by atomic force microscopy (AFM) and scanning electron microscopy (SEM). After 500, 750, and 1000 mJ/cm 2 fluence irradiations, the breakup of the Au and Ag films into nanoscale islands is observed as a consequence of fast melting and solidification processes. The mean nanoparticles size and surface density are quantified, as a function of the laser fluence, by the AFM and SEM analyses. In particular, the comparison between the Au and Ag islands reveals the formation of larger islands in the case of Ag for each fixed fluence. The mechanism of the nanoscale islands formation is discussed, both for Au and Ag, in terms of the starting film thickness fluctuations (influencing the local threshold for melting), dewetting phenomenon and the Rayleigh criterion. © 2012 by American Scientific Publishers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-07-01 |