Fabrication of Diisopropylammonium Bromide Aligned Microcrystals with In-Plane Uniaxial Polarization

Authors

Shashi Poddar, University of Nebraska-Lincoln
Haidong Lu, University of Nebraska-LincolnFollow
Jingfeng Song, University of Nebraska-LincolnFollow
Om Goit, University of Nebraska-Lincoln
Shah Valloppilly, University of Nebraska-Lincoln
Alexei Gruverman, University of Nebraska-LincolnFollow
Stephen Ducharme, University of Nebraska-LincolnFollow

Date of this Version

2016

Citation

Journal of Physics D: Applied Physics 49:50 (2016), pp. 1–9

doi: 10.1088/0022-3727/49/50/505305

Comments

Copyright © 2016 IOP Publishing Ltd. Used by permission.

Abstract

Textured arrays of ferroelectric microcrystals of diisopropylammonium bromide were grown from solution at room temperature onto silicon substrates and studied by means of x-ray diffraction, atomic force microscopy, electron microscopy, and piezoresponse force microscopy. The needle-shaped crystals had dimensions of approximately 50 μm × 5 μm in the plane and were approximately 200 nm thick, where the dimensions and arrangement were influenced by growth conditions. The observations suggest an Ostwald ripening mechanism of the microcrystal growth. The crystals had the structure of the ferroelectric phase, where the polarization axis was in-plane and parallel to the long axis of the crystals. The in-plane polarization could be switched at will with a scanning probe tip bias of 15 V and could be arranged in stable domain patterns with both charged and uncharged 180° domain walls.