Advanced Science,
Journal Year:
2022,
Volume and Issue:
9(13)
Published: March 11, 2022
Abstract
Piezoelectric
nanocomposites
with
oxide
fillers
in
a
polymer
matrix
combine
the
merit
of
high
piezoelectric
response
oxides
and
flexibility
as
well
biocompatibility
polymers.
Understanding
role
choice
materials
filler‐matrix
architecture
is
critical
to
achieving
desired
functionality
composite
towards
applications
flexible
electronics
energy
harvest
devices.
Herein,
high‐throughput
phase‐field
simulation
conducted
systematically
reveal
influence
morphology
spatial
orientation
an
filler
on
piezoelectric,
mechanical,
dielectric
properties
nanocomposites.
It
discovered
that
constant
volume
fraction,
composed
vertical
pillars
exhibits
superior
electromechanical
coupling
coefficient
compared
other
geometric
configurations.
An
analytical
regression
established
from
linear
regression‐based
machine
learning
model,
which
can
be
employed
predict
performance
filled
given
set
coefficient,
permittivity,
stiffness.
This
work
not
only
sheds
light
fundamental
mechanism
nanocomposites,
but
also
offers
promising
material
design
strategy
for
developing
high‐performance
polymer/inorganic
composite‐based
wearable
electronics.
Sensors and Actuators B Chemical,
Journal Year:
2022,
Volume and Issue:
374, P. 132731 - 132731
Published: Sept. 23, 2022
Humidity
sensing
is
crucial
for
several
industrial,
environmental,
and
healthcare
applications,
many
of
which
require
sensors
in
flexible
form
factors
with
features
such
as
disposability
facile
fabrication
processes.
Herein,
we
present
a
flexible,
cost-effective,
disposable
humidity
sensor
developed
on
paper
substrate.
The
screen-printed
graphene-carbon
(G-C)
ink-based
demonstrates
good
performance
terms
change
resistance
(∼12.4
Ω/%RH)
ranging
from
25%RH
to
91.7%RH.
displays
high
flexibility
(studied
at
bending
radiuses
40
mm,
30
25
20
mm),
appreciable
stability
(>
4
months),
repeatability
100
cycles),
short
response/recovery
time
(∼4
s/∼6
s
towards
respiration
rate
monitoring)
reproducibility
(minor
variations
∼
±
1
Ω/%RH).
efficacy
fabricated
evaluated
spatial
monitoring,
soil
moisture
monitoring.
Finally,
the
real
monitoring
also
demonstrated
via
wireless
transmission
data
smartphone
display
potential
agricultural,
applications.
Advanced Science,
Journal Year:
2022,
Volume and Issue:
9(13)
Published: March 11, 2022
Abstract
Piezoelectric
nanocomposites
with
oxide
fillers
in
a
polymer
matrix
combine
the
merit
of
high
piezoelectric
response
oxides
and
flexibility
as
well
biocompatibility
polymers.
Understanding
role
choice
materials
filler‐matrix
architecture
is
critical
to
achieving
desired
functionality
composite
towards
applications
flexible
electronics
energy
harvest
devices.
Herein,
high‐throughput
phase‐field
simulation
conducted
systematically
reveal
influence
morphology
spatial
orientation
an
filler
on
piezoelectric,
mechanical,
dielectric
properties
nanocomposites.
It
discovered
that
constant
volume
fraction,
composed
vertical
pillars
exhibits
superior
electromechanical
coupling
coefficient
compared
other
geometric
configurations.
An
analytical
regression
established
from
linear
regression‐based
machine
learning
model,
which
can
be
employed
predict
performance
filled
given
set
coefficient,
permittivity,
stiffness.
This
work
not
only
sheds
light
fundamental
mechanism
nanocomposites,
but
also
offers
promising
material
design
strategy
for
developing
high‐performance
polymer/inorganic
composite‐based
wearable
electronics.
