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Titolo:
TAPPING-MODE ATOMIC-FORCE MICROSCOPY STUDY OF THE NEAR-SURFACE COMPOSITION OF A STYRENE-BUTADIENE-STYRENE TRIBLOCK COPOLYMER FILM
Autore:
MAGONOV SN; CLEVELAND J; ELINGS V; DENLEY D; WHANGBO MH;
Indirizzi:
N CAROLINA STATE UNIV,DEPT CHEM,BOX 8204 RALEIGH NC 27695 N CAROLINA STATE UNIV,DEPT CHEM RALEIGH NC 27695 DIGITAL INSTRUMENTS INC SANTA BARBARA CA 93117 SHELL DEV CO,WESTHOLLOW RES CTR HOUSTON TX 77251
Titolo Testata:
Surface science
fascicolo: 1-3, volume: 389, anno: 1997,
pagine: 201 - 211
SICI:
0039-6028(1997)389:1-3<201:TAMSOT>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
CANTILEVERS; NONCONTACT; MORPHOLOGY;
Keywords:
ATOMIC FORCE MICROSCOPY; POLYMER SURFACE CHARACTERIZATION; STYRENE-BUTADIENE-STYRENE; TAPPING MODE OPERATION; TRIBLOCK COPOLYMER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
S.N. Magonov et al., "TAPPING-MODE ATOMIC-FORCE MICROSCOPY STUDY OF THE NEAR-SURFACE COMPOSITION OF A STYRENE-BUTADIENE-STYRENE TRIBLOCK COPOLYMER FILM", Surface science, 389(1-3), 1997, pp. 201-211

Abstract

Thin films of a styrene-butadiene-styrene triblock copolymer were examined by tapping-mode atomic force microscopy al different levels of tip-sample forces. The height images recorded at minimal forces show the surface topography of the topmost butadiene-rich layer. As the levelof the tip-sample force is increased, the height and phase images gradually undergo local changes and eventually reveal patterns of a microphase separation which forms underneath the topmost butadiene-rich layer. The contrast variations of the phase and height images are caused by differences in the interaction of the tip with styrene and butadiene blocks, and their qualitative trends are explained by taking into account the change of the effective resonance frequency of the interacting cantilever. The relative contrast of styrene and butadiene blocks depends sensitively on the driving frequency in height images, but not in phase images. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/10/20 alle ore 08:13:10