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Titolo:
Propagation of nanopatterned substrate templated ordering of block copolymers in thick films
Autore:
Rockford, L; Mochrie, SGJ; Russell, TP;
Indirizzi:
Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01002 USA Univ Massachusetts Amherst MA USA 01002 Sci & Engn, Amherst, MA 01002 USA Yale Univ, Dept Phys & Appl Phys, New Haven, CT 06520 USA Yale Univ New Haven CT USA 06520 hys & Appl Phys, New Haven, CT 06520 USA
Titolo Testata:
MACROMOLECULES
fascicolo: 5, volume: 34, anno: 2001,
pagine: 1487 - 1492
SICI:
0024-9297(20010227)34:5<1487:PONSTO>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIBLOCK COPOLYMERS; PATTERNED SURFACES; HETEROGENEOUS SURFACES; STRIPED SURFACES; ORIENTATION; MORPHOLOGY; LITHOGRAPHY; CONSTRAINTS; LAMELLAE; MELTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Russell, TP Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01002USA Univ Massachusetts Amherst MA USA 01002 Amherst, MA 01002 USA
Citazione:
L. Rockford et al., "Propagation of nanopatterned substrate templated ordering of block copolymers in thick films", MACROMOLEC, 34(5), 2001, pp. 1487-1492

Abstract

Control over the orientation of a symmetric block copolymer lamellar morphology using a striped, chemically heterogeneous surface has been established. Films of symmetric diblock copolymers of poly(styrene-bloch-methyl methacrylate) solution cast onto silicon oxide substrates striped with periodic,20 nm wide gold lines show lamellar microdomain orientation perpendicular to the substrate plane and parallel to the striping. Commensurability of the block copolymer and substrate stripe period is found to be essential to produce such a surface-directed morphology. A mismatch in length scale of only +/-10% is sufficient to lose control over the microdomain orientation. This window of commensurability for thick films is much smaller than that found previously for ultrathin films. Consequently, more stringent conditionsare met in unconfined films to direct the morphology with the surface. Thedistance over which the orientation of the microdomains persists is found to depend on the ordering kinetics, scaling with copolymer molecular weight, and is independent of the microdomain orientation at the surface.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 22:44:37