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Titolo:
Interesting optical properties of films composed of very small grains formed from a high-rate nanoparticle beam
Autore:
Urban, FK; Hosseini-Tehrani, A; Khabari, A; Griffiths, P; Fernandez, G;
Indirizzi:
Florida Int Univ, Dept Elect Engn, Miami, FL 33199 USA Florida Int Univ Miami FL USA 33199 Dept Elect Engn, Miami, FL 33199 USA
Titolo Testata:
THIN SOLID FILMS
, volume: 356, anno: 1999,
pagine: 513 - 517
SICI:
0040-6090(199911)356:<513:IOPOFC>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
LASER-ABLATION; CLUSTER; DEPOSITION; COPPER; ENERGY;
Keywords:
atomic force microscopy; ellipsometry; high-rate deposition; nanoparticle beams; nanoparticle films; optical properties;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Urban, FK Florida Int Univ, Dept Elect Engn, Univ Pk, Miami, FL 33199 USA Florida Int Univ Univ Pk Miami FL USA 33199 Miami, FL 33199 USA
Citazione:
F.K. Urban et al., "Interesting optical properties of films composed of very small grains formed from a high-rate nanoparticle beam", THIN SOL FI, 356, 1999, pp. 513-517

Abstract

Only a few films have been deposited from nanoparticle beams in spite of interest dating back to the early 1970s. Early attempts did not condense, could only condense a few high vapor pressure solids, or were so low rate as to make growth too slow to be of use. A new type of high-rate deposition system overcomes these impediments. Deposits have been made using Cu targets for a 1 Torr argon + helium sputtering and condensation atmosphere followedby nozzle aperture extraction. The beam is highly non-uniform with maximumintensity on-axis, which drops rapidly to zero from one to a few degrees off-axis depending on source conditions. The work reported here explores soft-landed nanoparticle films using no acceleration. These soft-landed films are porous with nanocrystalline structure from about 5 to 10 nm crystallites. Films are optically transparent with a controlled air leak into the source chamber and contain a significant (tens of percent) carbon contaminationfollowing exposure to air. Optical properties of the films change with deposition conditions and are different than that of literature values of thinfilm copper. Atomic force microscopy study shows a very rough outer surface and isolated 5-10 nm nanoparticles in the nearly film free regions. (C) 1999 Elsevier Science S.A. All rights reserved.

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Documento generato il 22/10/20 alle ore 05:25:10