Fig. 8

Optical nanocrystallography using spatially-resolved TERS. a Topography image of a BaTiO₃ nanorod. b Ferroelectric domain image acquired using the spectrally integrated TERS signal. c Cross-section profiles along the dashed lines marked in (a) and (b). d Assignment of domains according to the Raman selection rules for the TERS configuration used in reference [78]. Reprinted by permission from Macmillan Publishers Ltd: NATURE NANOTECHNOLOGY [78], copyright (2009)