@article{10902/38311,
year = {2023},
month = {7},
url = {https://hdl.handle.net/10902/38311},
abstract = {Amide-based discotic supramolecular organic materials are of interest for fundamental understanding of cooperative self-assembly and collective dipole switching mechanisms as well as for practically relevant ferroelectric and piezoelectric properties. Here, we show how replacing amides (dipole moment of -3.5 D) with thioamides (-5.1 D) as dipolar moieties in the archetypal C3-symmetric discotic molecule BTA leads to ferroelectric materials with a higher remnant polarization and lower coercive field. The thioamide-based materials also demonstrate a rare negative piezoelectricity and a previously predicted, yet never experimentally observed, polarization reversal via asymmetric intermediate states, that is, ferrielectric switching.},
organization = {We would like to thank Prof. Beatriz Noheda Pinuaga for the opportunity to use the piezoelectric response measurement equipment and Anja R. A. Palmans and Tim D. Cornelissen for stimulating discussions and commenting on the manuscript. We also acknowledge technical support and help from Jacob Baas and Yingfen Wei during the piezoelectric measurements. I.U. acknowledges funding by Vetenskapsrådet (project nr. 2015-03813). M.G.I. thanks Santander Talent Attraction Research (STAR2) and financial support from Spanish MINECO (PID2021-125429NA-I00). M.K. thanks the Carl Zeiss Foundation for financial support.},
publisher = {Royal Society of Chemistry},
publisher = {Physical Chemistry Chemical Physics, 2023, 25(25), 16930-16937},
title = {Ferro- and ferrielectricity and negative piezoelectricity in thioamide-based supramolecular organic discotics},
author = {Urbanaviciute, Indre and García Iglesias, Miguel and Gorbunov, Andrey and Meijer, E.W. and Kemerink, Martijn},
}