Please use this identifier to cite or link to this item:
|Title:||Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline|
Gomes, Etelvina de Matos
Shur, Vladimir Ya
Kholkin, Andrei L.
|Keywords:||PIEZORESPONSE FORCE MICROSCOPY|
|Publisher:||AMER INST PHYSICS|
|Abstract:||Potential ferroelectricity in charge-transfer organic materials is often masked by the intrinsic conductivity. Here, we report the compelling evidence of ferroelectricity in organic pi-conjugated meta-nitroaniline (m-NA) crystals as shown by the local electromechanical measurements using the piezoresponse force microscopy (PFM) technique. m-NA is a charge-transfer molecular material with the exceptional optical non-linearity and perceptible conductivity along the crystallographic polar axis. While standard Sawyer-Tower measurements revealed an apparently lossy-dielectric hysteresis, The PFM switching spectroscopy indicated clear ferroelectric behaviour in this technologically important multifunctional material. Further study of the pyroelectric properties in m-NA crystals confirmed their high spontaneous polarization of 18 mu C/cm(2) at room temperature, comparable to the best known organic ferroelectrics. Published by AIP Publishing.|
|Appears in Collections:||CICECO - Artigos|
Files in This Item:
|Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline_10.10631.4965710.pdf||756.88 kB||Adobe PDF||View/Open|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.