Highly Ordered Titanium Dioxide Nanostructures via a Simple One Step Vapor Inclusion Method in Block Copolymer Films

Elsa Coline Giraud, Parvaneh Mokarian- Tabari, Daniel Thomas William Toolan, Thomas Arnold, Andrew J. Smith, Jonathan R Howse, Paul D Topham, Michael A. Morris

Research output: Contribution to journalArticle

Abstract

Nanostructured crystalline titanium dioxide (TiO2) finds applications in numerous fields such as photocatalysis or photovoltaics where its physical and chemical properties depend on its shape and crystallinity. We report a simple method of fabricating TiO2 nanowires by selective area deposition of titanium tetraisopropoxide (TTIP) and water in a CVD-based approach at low temperature by utilizing PS-b-PEO self-assembled block copolymer thin film as a template. Parameters such as exposure time to TTIP (minutes to hours), working temperature (~18 to 40 °C) and relative humidity (20 to 70 RH%) were systemically investigated through GISAXS, SEM and XPS and optimized for fabrication of TiO2 nanostructures. The resulting processing conditions yielded titanium dioxide nanowires with a diameter of 24 nm. An extra calcination step (400 – 700 °C) was introduced to burn off the remaining organic matrix and introduce phase change from amorphous to anatase in TiO2 nanowires without any loss in order.
LanguageEnglish
JournalACS Applied Nano Materials
Early online date18 Jun 2018
DOIs
Publication statusE-pub ahead of print - 18 Jun 2018

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Titanium dioxide
Block copolymers
Nanowires
Nanostructures
Vapors
Titanium
Photocatalysis
Polyethylene oxides
Calcination
Chemical properties
Chemical vapor deposition
Atmospheric humidity
X ray photoelectron spectroscopy
Physical properties
Crystalline materials
Fabrication
Thin films
Temperature
Scanning electron microscopy
Water

Bibliographical note

Copyright © 2018 American Chemical Society

Cite this

Giraud, E. C., Mokarian- Tabari, P., Toolan, D. T. W., Arnold, T., Smith, A. J., Howse, J. R., ... Morris, M. A. (2018). Highly Ordered Titanium Dioxide Nanostructures via a Simple One Step Vapor Inclusion Method in Block Copolymer Films.. https://doi.org/10.1021/acsanm.8b00632
Giraud, Elsa Coline ; Mokarian- Tabari, Parvaneh ; Toolan, Daniel Thomas William ; Arnold, Thomas ; Smith, Andrew J. ; Howse, Jonathan R ; Topham, Paul D ; Morris, Michael A. / Highly Ordered Titanium Dioxide Nanostructures via a Simple One Step Vapor Inclusion Method in Block Copolymer Films. 2018.
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Highly Ordered Titanium Dioxide Nanostructures via a Simple One Step Vapor Inclusion Method in Block Copolymer Films. / Giraud, Elsa Coline; Mokarian- Tabari, Parvaneh; Toolan, Daniel Thomas William; Arnold, Thomas; Smith, Andrew J.; Howse, Jonathan R; Topham, Paul D; Morris, Michael A.

18.06.2018.

Research output: Contribution to journalArticle

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