Strong Orientational Coupling of Block Copolymer Microdomains to Smectic Layering Revealed by Magnetic Field Alignment.

Gopinadhan, M; Choo, Y; Osuji, CO

Strong Orientational Coupling of Block Copolymer Microdomains to Smectic Layering Revealed by Magnetic Field Alignment.

Gopinadhan, M Choo, Y

Osuji, CO

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: ACS Macro Lett, 2016, 5, (3), pp. 292-296
Issue Date:: 2016-03-15

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Field	Value	Language
dc.contributor.author	Gopinadhan, M
dc.contributor.author	Choo, Y https://orcid.org/0000-0003-2715-0618
dc.contributor.author	Osuji, CO
dc.date.accessioned	2022-08-15T19:46:00Z
dc.date.available	2022-08-15T19:46:00Z
dc.date.issued	2016-03-15
dc.identifier.citation	ACS Macro Lett, 2016, 5, (3), pp. 292-296
dc.identifier.issn	2161-1653
dc.identifier.issn	2161-1653
dc.identifier.uri	http://hdl.handle.net/10453/160238
dc.description.abstract	We elucidate the roles of the isotropic-nematic (I-N) and nematic-smectic A (N-SmA) transitions in the magnetic field directed self-assembly of a liquid crystalline block copolymer (BCP), using in situ X-ray scattering. Cooling into the nematic from the disordered melt yields poorly ordered and weakly aligned BCP microdomains. Continued cooling into the SmA, however, results in an abrupt increase in BCP orientational order with microdomain alignment tightly coupled to the translational order parameter of the smectic layers. These results underscore the significance of the N-SmA transition in generating highly aligned states under magnetic fields in these hierarchically ordered materials.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	ACS Macro Lett
dc.relation.isbasedon	10.1021/acsmacrolett.5b00924
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0306 Physical Chemistry (incl. Structural)
dc.title	Strong Orientational Coupling of Block Copolymer Microdomains to Smectic Layering Revealed by Magnetic Field Alignment.
dc.type	Journal Article
utslib.citation.volume	5
utslib.location.activity	United States
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0306 Physical Chemistry (incl. Structural)
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-08-15T19:45:54Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	5
utslib.citation.issue	3

Abstract:

We elucidate the roles of the isotropic-nematic (I-N) and nematic-smectic A (N-SmA) transitions in the magnetic field directed self-assembly of a liquid crystalline block copolymer (BCP), using in situ X-ray scattering. Cooling into the nematic from the disordered melt yields poorly ordered and weakly aligned BCP microdomains. Continued cooling into the SmA, however, results in an abrupt increase in BCP orientational order with microdomain alignment tightly coupled to the translational order parameter of the smectic layers. These results underscore the significance of the N-SmA transition in generating highly aligned states under magnetic fields in these hierarchically ordered materials.

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http://hdl.handle.net/10453/160238