Type

Journal Article

Authors

Michael A. Morris
Justin D. Holmes
Ciara T. Bolger
Matthew T. Shaw
Tandra Ghoshal

Subjects

Chemistry

Topics
thin films polyethylene oxides block copolymers ethanol separation cylinders shapes polystyrenes metal ions

A general method for controlled nanopatterning of oxide dots: a microphase separated block copolymer platform (2012)

Abstract We demonstrate a facile, generic method for the fabrication of highly dense long range hexagonally ordered various inorganic oxide nanodots on different substrates by using a microphase separated polystyrene-b-poly(ethylene oxide) (PS-b-PEO) block copolymer (BCP) thin film as a structural template. The method does not require complex co-ordination chemistry (between metal precursors and the polymer) and instead involves the simple, solution based chemistry applicable to a wide range of systems. A highly ordered PS-b-PEO thin film with perpendicularly oriented PEO cylinders is fabricated by solvent annealing over wafer scale. PEO cylinders are activated by ethanol to create a functional chemical pattern for nanodot development via spin coating and block selective metal ion inclusion. Subsequent UV/ozone treatment forms an ordered arrangement of oxide nanodots and removes the polymer components. The phase purity, crystallinity and thermal stability of these materials coupled to the ease of production may make them useful in technological applications. This method is particularly useful because the feature sizes can be tuned by changing the concentration of the precursors without changing the molecular weight and concentration of the block copolymer.
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Full list of authors on original publication

Michael A. Morris, Justin D. Holmes, Ciara T. Bolger, Matthew T. Shaw, Tandra Ghoshal

Experts in our system

1
Michael A. Morris
University College Cork
Total Publications: 164
 
2
Justin D. Holmes
University College Cork
Total Publications: 287
 
3
Matthew T Shaw
University College Cork
Total Publications: 24
 
4
Tandra Ghoshal
University College Cork
Total Publications: 32