Type

Journal Article

Authors

Justin D. Holmes
Michael A. Morris
Roger W. Whatmore
Colm O'Regan
Nitin Deepak
Tandra Ghoshal
Justin M. Varghese

Subjects

Chemistry

Topics
ferroelectric materials scanning probe microscopy nanodots piezoelectric ps b peo block copolymers pzt block copolymer self assembly photoelectrons block copolymer x ray diffraction semiconducting lead compounds lead zirconate titanate nanodot piezoresponse force microscopy self assembly x ray photoelectron spectroscopy ferroelectricity nanostructured materials pfm

Fabrication of arrays of lead zirconate titanate (PZT) nanodots via block copolymer self-assembly (2013)

Abstract This Article presents a simple methodology for the fabrication of two-dimensional arrays of lead zirconate titanate (PZT) nanodots on n-doped Si substrates via the directed self-assembly of PS-b-PEO block copolymer templates. The approach produces highly ordered PZT nanodot patterns, with lateral widths and heights as small as 20 and 10 nm, respectively, and a coverage density as high as ∼68 × 109 nanodots cm–2. The existence of a perovskite phase in the nanodots was confirmed by X-ray diffraction and X-ray photoelectron spectroscopy. The piezo-amplitude and ferroelectric domain response obtained from the nanodots, through piezoresponse force microscopy, confirmed the presence of ferroelectricity in the PZT arrays. Notably, PZT nanodots with a thickness ∼10 nm, which is close to the critical size limit of PZT, showed ferroelectric behavior. The presence of a multi-a/c domain structure in the nanodots was attributed to their polycrystalline nature.
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Full list of authors on original publication

Justin D. Holmes, Michael A. Morris, Roger W. Whatmore, Colm O'Regan, Nitin Deepak, Tandra Ghoshal, Justin M. Varghese

Experts in our system

1
Justin D. Holmes
University College Cork
Total Publications: 287
 
2
Michael A. Morris
University College Cork
Total Publications: 164
 
3
Roger W. Whatmore
University College Cork
Total Publications: 23
 
4
Colm O'Regan
University College Cork
Total Publications: 16
 
5
Nitin Deepak
University College Cork
Total Publications: 14
 
6
Tandra Ghoshal
University College Cork
Total Publications: 32
 
7
Justin M. Varghese
University College Cork
Total Publications: 10