Diisopropylammonium bromide is a high-temperature molecular ferroelectric crystal.
Molecular ferroelectrics are highly desirable for their easy and environmentally friendly processing, light weight, and mechanical flexibility. We found that diisopropylammonium bromide (DIPAB), a molecular crystal processed from aqueous solution, is a ferroelectric with a spontaneous polarization of 23 microcoulombs per square centimeter [close to that of barium titanate (BTO)], high Curie temperature of 426 kelvin (above that of BTO), large dielectric constant, and low dielectric loss. DIPAB exhibits good piezoelectric response and well-defined ferroelectric domains. These attributes make it a molecular alternative to perovskite ferroelectrics and ferroelectric polymers in sensing, actuation, data storage, electro-optics, and molecular or flexible electronics.
Ordered Matter Science Research Centre, Southeast University, Nanjing 211189, China.
Da-Wei
DW
Fu
Hong-Ling
HL
Cai
Yuanming
Y
Liu
Qiong
Q
Ye
Wen
W
Zhang
Yi
Y
Zhang
Xue-Yuan
XY
Chen
Gianluca
G
Giovannetti
Massimo
M
Capone
Jiangyu
J
Li
Ren-Gen
RG
Xiong