TY - JOUR
T1 - Self-Assembly of Organic Ferroelectrics by Evaporative Dewetting
T2 - A Case of β-Glycine
AU - Seyedhosseini, Ensieh
AU - Romanyuk, Konstantin
AU - Vasileva, Daria
AU - Vasilev, Semen
AU - Nuraeva, Alla
AU - Zelenovskiy, Pavel
AU - Ivanov, Maxim
AU - Morozovska, Anna N.
AU - Shur, Vladimir Ya
AU - Lu, Haidong
AU - Gruverman, Alexei
AU - Kholkin, Andrei L.
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/6/14
Y1 - 2017/6/14
N2 - Self-assembly of ferroelectric materials attracts significant interest because it offers a promising fabrication route to novel structures useful for microelectronic devices such as nonvolatile memories, integrated sensors/actuators, or energy harvesters. In this work, we demonstrate a novel approach for self-assembly of organic ferroelectrics (as exemplified by ferroelectric β-glycine) using evaporative dewetting, which allows forming quasi-regular arrays of nano- and microislands with preferred orientation of polarization axes. Surprisingly, self-assembled islands are crystallographically oriented in a radial direction from the center of organic "grains" formed during dewetting process. The kinetics of dewetting process follows the t-1/2 law, which is responsible for the observed polygon shape of the grain boundaries and island coverage as a function of radial position. The polarization in ferroelectric islands of β-glycine is parallel to the substrate and switchable under a relatively small dc voltage applied by the conducting tip of piezoresponse force microscope. Significant size effect on polarization is observed and explained within the Landau-Ginzburg-Devonshire phenomenological formalism.
AB - Self-assembly of ferroelectric materials attracts significant interest because it offers a promising fabrication route to novel structures useful for microelectronic devices such as nonvolatile memories, integrated sensors/actuators, or energy harvesters. In this work, we demonstrate a novel approach for self-assembly of organic ferroelectrics (as exemplified by ferroelectric β-glycine) using evaporative dewetting, which allows forming quasi-regular arrays of nano- and microislands with preferred orientation of polarization axes. Surprisingly, self-assembled islands are crystallographically oriented in a radial direction from the center of organic "grains" formed during dewetting process. The kinetics of dewetting process follows the t-1/2 law, which is responsible for the observed polygon shape of the grain boundaries and island coverage as a function of radial position. The polarization in ferroelectric islands of β-glycine is parallel to the substrate and switchable under a relatively small dc voltage applied by the conducting tip of piezoresponse force microscope. Significant size effect on polarization is observed and explained within the Landau-Ginzburg-Devonshire phenomenological formalism.
KW - dewetting
KW - glycine
KW - organic ferroelectrics
KW - self-assembly
KW - size effect
UR - http://www.scopus.com/inward/record.url?scp=85020778811&partnerID=8YFLogxK
U2 - 10.1021/acsami.7b02952
DO - 10.1021/acsami.7b02952
M3 - Article
C2 - 28534399
AN - SCOPUS:85020778811
SN - 1944-8244
VL - 9
SP - 20029
EP - 20037
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 23
ER -