Delamination and Dissolution of Titanate Nanowires: A Combined Structure and in Situ Second Harmonic Generation Study

Journal article
(Original article)


Publication Details

Author(s): Schürer B, Elser MJ, Sternig A, Peukert W, Diwald O
Journal: Journal of Physical Chemistry C
Publication year: 2011
Volume: 115
Journal issue: 25
Pages range: 12381--12387
ISSN: 1932-7447
eISSN: 1932-7455
Language: English


Abstract


Mechanistic insights into shape and structure transformation of metal oxide nanostructures are critical to our understanding of how synthesis parameters and chemical environment affect their properties. Na2Ti3O7 nanowires, which are composed of titanate nanosheets and which contain sodium ions in the interlayer region, are thermodynamically unstable in acid solutions. At room temperature nanosheet delamination along the nanowire length axis leads to coiled-up nanoscrolls. At 373 K, a dissolution and TiO2 recrystallization process gives rise to colloidal anatase nanoparticles. The impact of temperature on different reaction pathways is attributed to differences in the energy barriers associated with the two transformation channels. We comprehensively investigated these reactions with X-ray diffraction and electron microscopy and for the first time tracked processes at the solid–liquid interface such as nanosheet delamination by time-resolved second harmonic generation (SHG) measurements. The applicability of the SHG method for in situ studies which address the transformation of layered nanostructures in aqueous solution even at high electrolyte concentrations is demonstrated.



FAU Authors / FAU Editors

Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Sternig, Andreas
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions with authors

Universität Salzburg (Paris Lodron Universität Salzburg)


Research Fields

C Photonic and Optical Materials
Exzellenz-Cluster Engineering of Advanced Materials
A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Schürer, B., Elser, M.J., Sternig, A., Peukert, W., & Diwald, O. (2011). Delamination and Dissolution of Titanate Nanowires: A Combined Structure and in Situ Second Harmonic Generation Study. Journal of Physical Chemistry C, 115(25), 12381--12387. https://dx.doi.org/10.1021/jp203709a

MLA:
Schürer, Benedikt, et al. "Delamination and Dissolution of Titanate Nanowires: A Combined Structure and in Situ Second Harmonic Generation Study." Journal of Physical Chemistry C 115.25 (2011): 12381--12387.

BibTeX: 

Last updated on 2019-06-08 at 09:05

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