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Structural Evolution of Self‐Assembling Nanohybrid Thin Films from Functionalized Urea Precursors

Identifieur interne : 009093 ( Main/Exploration ); précédent : 009092; suivant : 009094

Structural Evolution of Self‐Assembling Nanohybrid Thin Films from Functionalized Urea Precursors

Auteurs : I. Karatchevtseva [Australie] ; D. Cassidy [Australie] ; M. Wong Hi An [France] ; D. Mitchell [Australie] ; J. Hanna [Australie] ; C. Carcel [France] ; C. Bied [France] ; J. Moreau [France] ; J. Bartlett [Australie]

Source :

RBID : ISTEX:6BB5302775E3DDD1396E2D91770134F7EEE8B508

English descriptors

Abstract

Hybrid organic‐inorganic thin films exhibiting patterned structuring on the nanometer scale have been prepared through the controlled hydrolysis‐condensation of enantiomerically pure chiral urea‐based silyl compounds. The thin films are obtained by spin‐coating of sols obtained via acid‐ or base‐catalyzed hydrolytic condensation of these molecular precursors. A self‐templating process is demonstrated via atomic force and transmission electron microscopy, showing the formation of nanometer size aggregates consisting of interconnected spherulates under acidic condition and of assembled fibers under basic conditions.

Url:
DOI: 10.1002/adfm.200700299


Affiliations:


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Le document en format XML

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<term>Acidic</term>
<term>Acidic conditions</term>
<term>Adjacent urea groups</term>
<term>Ageing</term>
<term>Ageing time</term>
<term>Aggregate size</term>
<term>Ambient temperature</term>
<term>Amide</term>
<term>Basic conditions</term>
<term>Bied</term>
<term>Bulk materials</term>
<term>Chem</term>
<term>Chiral precursor</term>
<term>Coating solutions</term>
<term>Corresponding bulk materials</term>
<term>Corresponding films</term>
<term>Corresponding increase</term>
<term>Corriu</term>
<term>Film morphology</term>
<term>Ftir</term>
<term>Ftir spectra</term>
<term>Full paper</term>
<term>Funct</term>
<term>Gmbh</term>
<term>Hollow tubes</term>
<term>Hybrid</term>
<term>Hybrid films</term>
<term>Hybrid materials</term>
<term>Hydrolytic condensation</term>
<term>Karatchevtseva</term>
<term>Kgaa</term>
<term>Mater</term>
<term>Moreau</term>
<term>Morphology</term>
<term>Nanohybrid</term>
<term>Noyes publications</term>
<term>Optical images</term>
<term>Oxide electronics</term>
<term>Precursor</term>
<term>Precursor molecules</term>
<term>Primary particles</term>
<term>Same time</term>
<term>Secondary structures</term>
<term>Shear stress</term>
<term>Significant differences</term>
<term>Significant extent</term>
<term>Sol</term>
<term>Specialty shapes</term>
<term>Strong hydrogen</term>
<term>Strong interactions</term>
<term>Structural evolution</term>
<term>Supramolecular species</term>
<term>Thin coatings</term>
<term>Thin films</term>
<term>Urea</term>
<term>Urea groups</term>
<term>Urea nitrogen</term>
<term>Verlag</term>
<term>Verlag gmbh</term>
<term>Vibration shifts</term>
<term>Weak hydrogen</term>
<term>Weinheim</term>
<term>Wong</term>
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<term>Basic conditions</term>
<term>Bied</term>
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<term>Chiral precursor</term>
<term>Coating solutions</term>
<term>Corresponding bulk materials</term>
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<term>Ftir spectra</term>
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<front>
<div type="abstract" xml:lang="en">Hybrid organic‐inorganic thin films exhibiting patterned structuring on the nanometer scale have been prepared through the controlled hydrolysis‐condensation of enantiomerically pure chiral urea‐based silyl compounds. The thin films are obtained by spin‐coating of sols obtained via acid‐ or base‐catalyzed hydrolytic condensation of these molecular precursors. A self‐templating process is demonstrated via atomic force and transmission electron microscopy, showing the formation of nanometer size aggregates consisting of interconnected spherulates under acidic condition and of assembled fibers under basic conditions.</div>
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