Well-ordered large-area arrays of epitaxial ferroelectric (Bi, La)4Ti3O12 nanostructures fabricated by gold nanotube-membrane lithography -: art. no. 152906

Two-dimension ally well-ordered, large-area arrays of epitaxial, ferroelectric, La-substituted Bi4Ti3O12 (BLT) nanostructures are prepared using gold nanotube membranes as a liftoff mask. Epitaxial nanostructures with a height of about 65 nm and a lateral size of about 150 rim, with either (001) (c-axis) orientation, or mixed (118)/(100) (non-c-axis) orientation, are obtained on (001)- and (011)-oriented SrTiO3 substrates, respectively. The ferroelectric properties are probed by piezoresponse scanning force microscopy. Non-c-axis-oriented BLT nanostructures show an effective piezoresponse coefficient (2d(zz)) of about 38.0 pm/V, whereas c-axis-oriented structures show one of only about 4.9 pm/V. (C) 2005 American Institute of Physics.