Flexible
pressure
sensors
have
attracted
significant
attention
due
to
their
wide
range
of
applications
in
various
fields
(e.g.,
robotis,
healthcare,
and
human-machine
interfaces).
However,
achieving
both
high
ensitivity
a
detaction
remains
challenge.
Here,
we
propose
novel
starfish-inspired
ultrasensitive
piezoresistive
sensor
capable
detecting
an
extensive
pressures.
The
sensor's
design
incorporates
low
spine
structures
inspired
by
the
surface
starfish,
efficiently
preventing
rapid
saturation
detection
expanding
response
range.
Unlike
single-material
nanofiber
structures,
ultrathin
layer,
fabricated
using
PEDOT:
PSS/TPU
nanofibers,
possesses
large
area
ratio
numerous
contact
points.
This
allows
for
quick
increase
conductive
channels
when
is
applied.
intertwining
PSS
fibers
with
TPU
enhances
mechanical
strength
fiber
membrane
initial
resistance
sensor,
thereby
increasing
its
sensitivity.
Additionally,
PVA
are
over
interdigital
electrode
serve
as
insulation
layer
controlling
change
between
sensitive
electrode.
Inportantly,
interaction
alters
deformation
behavior
fibers,
further
enhancing
performance
sensor.
demonstrates
exceptional
sensitivity
(302.9
kPa-1),
0-426.7
kPa,
remarkable
endurance
7,000
cycles
at
110
rendering
it
device
great
potential
precise
sensing
health
monitoring
intelligent
production.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(8), P. 8813 - 8822
Published: April 12, 2024
Flexible
electronic
devices,
particularly
wearable
piezoresistive
sensors,
have
garnered
considerable
research
attention
due
to
their
potential
applications
in
medical
diagnosis,
human–machine
interaction,
and
motion
monitoring.
However,
it
remains
a
pressing
challenge
highly
demanded
for
the
fabrication
of
sensors
with
outstanding
sensing
performance,
breathability,
degradability
at
end
life
cycle.
In
this
study,
we
prepared
high-performance
breathability
degradability.
These
were
made
reduced
graphene
oxide/silk
fibers
(rGO/SFs)
as
materials
carbon
cloth
(CC)
interdigital
electrodes.
Taking
advantage
porous
structures
rGO/SFs
composite
CC,
rGO/SFs/CC
sensor
demonstrated
low
detection
limit
(1
Pa),
substantial
sensitivity
across
broad
response
range
(over
500
kPa),
rapid
(92
ms),
quick
recovery
time
(26
ms).
Moreover,
maintained
excellent
electromechanical
reliability
even
after
undergoing
10,000
loading–unloading
cycles.
Furthermore,
these
also
exhibited
other
favorable
attributes,
including
degradability,
exceptional
capabilities
toward
various
deformations
(compression,
distortion,
bending),
stability
different
loading
frequencies
temperatures.
The
successfully
served
real-time
monitoring
identification
full-scale
body
motions.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 1, 2024
Abstract
Piezoresistive
pressure
sensors,
analyzing
and
converting
external
signals
to
readable
electrical
for
monitoring
human
health,
are
always
subjected
simultaneously
possess
high
signal‐linearity
signal
sensitivity.
Analogous
the
control
of
sophisticated
microstructure
increasing
active
sensing
area,
gradient
conductivity
should
enable
a
linear
response
via
regulating
formed
saturation
current.
Here,
inspired
by
phase
separation
showing
feasibility
controlling
material
conductivity,
high‐performance
flexible
sensor
simultaneous
microgroove
structure
wide‐range
is
demonstrated.
First,
laser‐etching
dopamine
(DA)‐doping
synergistic
approach
used
induce
selective
in
poly(3,4‐ethylenedioxythiophene):
poly(styrenesulfonic
acid)
(PEDOT:PSS),
achieving
broad
modulation
(from
297
4525
S
cm
−1
)
precise
pattern
(15.5
µm).
Then,
designing
conductivity‐gradient
PEDOT:
PSS‐based
multi‐sublayers
interlocked
structure,
shows
extraordinarily
comprehensive
performance
excellent
stress‐sensing
sensitivity
(4
×
10
5
kPa
),
responsiveness
(99.85%)
ability
(up
100
kPa).
Consequently,
this
reveals
capability
detecting
multi‐mode
changes
expected
branch
out
into
other
electronic
device
designs
as
general
strategy
manipulation
physical‐chemical
properties.
