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Titolo:
ROLE OF SURFACE PERFECTION IN CHEMICAL FORCE MICROSCOPY
Autore:
MCKENDRY R; THEOCLITOU ME; ABELL C; RAYMENT T;
Indirizzi:
UNIV CAMBRIDGE,DEPT CHEM,LENSFIELD RD CAMBRIDGE CB2 1EW ENGLAND UNIV CAMBRIDGE,DEPT CHEM CAMBRIDGE CB2 1EW ENGLAND
Titolo Testata:
Langmuir
fascicolo: 10, volume: 14, anno: 1998,
pagine: 2846 - 2849
SICI:
0743-7463(1998)14:10<2846:ROSPIC>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
ADHESION FORCES; GOLD-FILMS; AFM TIPS; MORPHOLOGY; MONOLAYERS; FRICTION; BINDING; LIGAND; GLASS; MICA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
R. Mckendry et al., "ROLE OF SURFACE PERFECTION IN CHEMICAL FORCE MICROSCOPY", Langmuir, 14(10), 1998, pp. 2846-2849

Abstract

In this paper we investigate the effect that the quality of the gold substrate has upon the distribution of adhesion force measurements in chemical force microscopy. Gold samples have been prepared by two protocols which give either predominantly single-crystal Au(lll) or polycrystalline gold films on mica. Gold-coated tips and surfaces were functionalized with self-assembled monolayers terminating in carboxylic groups, and more that 500 force-distance plots were taken. Analysis of these plots revealed a 50% narrower distribution of adhesion forces between monolayers prepared on single-crystal surfaces and monolayers prepared on polycrystalline gold, when measurements were repeated at a single point. However when measurements were taken over a 1-mu m(2) area,the distribution of adhesion forces was similar for both samples. An explanation for this may lie in the size of the domains on the gold surface relative to the contact area of the tip.

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Documento generato il 05/12/20 alle ore 01:58:26