Lyotropic self-assembly of high-aspect-ratio semiconductor nanowires of single-crystal ZnO

© 2011 American Chemical Society

Bibliographische Detailangaben
Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 27(2011), 18 vom: 20. Sept., Seite 11616-21
1. Verfasser: Zhang, Shanju (VerfasserIn)
Weitere Verfasser: Majewski, Pawel W, Keskar, Gayatri, Pfefferle, Lisa D, Osuji, Chinedum O
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2011
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a Lyotropic nanowire dispersions are attractive precursors for semiconductor device fabrication because they permit the alignment control of active nanomaterials. The reliable production of nanowire-based mesophases, however, is very challenging in practice. We show that appropriately functionalized high-aspect-ratio nanowires of single-crystal ZnO spontaneously form nematic phases in organic and aqueous media. These systems show isotropic, biphasic, and nematic phases on increasing concentration, in reasonable agreement with Onsager's theory for rigid rods interacting via excluded volume. Suspensions were readily processed to produce films with large-area monodomains of aligned nanowires. Imprints of the director field in quiescently dried films display a propensity for bend deformation in the organic mesophase versus splay deformation in the aqueous case, suggesting that system elasticity may be tuned via surface functionalization. These results provide critical insight for the utilization of semiconductor nanowires as novel mesogens and further enable the use of solution-based routes for fabricating optoelectronic devices 
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700 1 |a Majewski, Pawel W  |e verfasserin  |4 aut 
700 1 |a Keskar, Gayatri  |e verfasserin  |4 aut 
700 1 |a Pfefferle, Lisa D  |e verfasserin  |4 aut 
700 1 |a Osuji, Chinedum O  |e verfasserin  |4 aut 
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