Thickness-Dependent Piezoelectric Property from Quasi-Two-Dimensional Zinc Oxide Nanosheets with Unit Cell Resolution.

ABSTRACT: A quantitative understanding of the nanoscale piezoelectric property will unlock many application potentials of the electromechanical coupling phenomenon under quantum confinement. In this work, we present an atomic force microscopy- (AFM-) based approach to the quantification of the nanometer-scale piezoelectric property from single-crystalline zinc oxide nanosheets (NSs) with thicknesses ranging from 1 to 4 nm. By identifying the appropriate driving potential, we minimized the influences from electrostatic interactions and tip-sample coupling, and extrapolated the thickness-dependent piezoelectric coefficient (d ₃₃). By averaging the measured d ₃₃ from NSs with the same number of unit cells in thickness, an intriguing tri-unit-cell relationship was obs

SUBMITTER: Carlos C 

PROVIDER: S-EPMC7936626 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature