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2015 ; 5
(ä): 10845
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Superior electro-optic response in multiferroic bismuth ferrite nanoparticle
doped nematic liquid crystal device
#MMPMID26041701
Nayek P
; Li G
Sci Rep
2015[Jun]; 5
(ä): 10845
PMID26041701
show ga
A superior electro-optic (E-O) response has been achieved when multiferroic
bismuth ferrite (BiFeO3/BFO) nanoparticles (NPs) were doped in nematic liquid
crystal (NLC) host E7 and the LC device was addressed in the large signal regime
by an amplitude modulated square wave signal at the frequency of 100 Hz. The
optimized concentration of BFO is 0.15 wt%, and the corresponding total optical
response time (rise time + decay time) for a 5 ?m-thick cell is 2.5 ms for ~7
V(rms). This might be exploited for the construction of adaptive lenses,
modulators, displays, and other E-O devices. The possible reason behind the fast
response time could be the visco-elastic constant and restoring force imparted by
the locally ordered LCs induced by the multiferroic nanoparticles (MNPs).
Polarized optical microscopic textural observation shows that the macroscopic
dislocation-free excellent contrast have significant impact on improving the
image quality and performance of the devices.