Self-assembly of multilevel branched rutile-type TiO2 structures via oriented lateral and twin attachment.

Abstract:

:Recent breakthrough of novel hierarchic materials, orchestrated through oriented attachment of crystal subunits, opened questions on what is the mechanism of their self-assembly. Using rutile-type TiO2, synthesized by hydrothermal reaction of Ti(IV)-butoxide in highly acidic aqueous medium, we uncovered the key processes controlling this nonclassical crystallization process. Formation of complex branched mesocrystals of rutile is accomplished by oriented assembly of precipitated fibers along the two low-energy planes, i.e. {110} and {101}, resulting in lateral attachment and twinning. Phase analysis of amorphous material enclosed in pockets between imperfectly assembled rutile fibers clearly shows harmonic ordering resembling that of the adjacent rutile structure. To our understanding this may be the first experimental evidence indicating the presence of electromagnetic force-fields that convey critical structural information through which oriented attachment of nanocrystals is made possible.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Jordan V,Javornik U,Plavec J,Podgornik A,Rečnik A

doi

10.1038/srep24216

subject

Has Abstract

pub_date

2016-04-11 00:00:00

pages

24216

issn

2045-2322

pii

srep24216

journal_volume

6

pub_type

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