International Journal of Smart and Nano Materials,
Год журнала:
2024,
Номер
unknown, С. 1 - 16
Опубликована: Дек. 18, 2024
With
the
fast-evolving
landscape
of
flexible
and
wearable
electronics,
functional
fibers
for
withstanding
high
strains
in
smart
wearables,
soft
robotics,
health
monitoring
systems
are
under
increasing
demands.
We
report
ultra-stretchable
conductive
with
a
thermal
drawing
process,
controlled
engineered
precise
motion
sensing.
This
approach
enables
uniform
microcavities,
facilitating
scalable
production
elastic
through
simple
fabrication
process.
Integrating
liquid
metal
(Eutectic
Gallium-Indium-Tin
alloys)
into
fiber
yielded
device
gauge
factor
(GF)
0.91,
remarkable
linearity
(R2
=
0.999),
rapid
response
time
(100
ms),
low
hysteresis
(<3%)
up
to
1000%
strain.
The
SFCSS
could
be
readily
integrated
textiles,
such
as
gloves
clothing,
enabling
detection
wide
range
human
motions,
including
static
sensing
finger
motion,
knee
posture
dynamic
activities
standing,
sitting,
squatting,
walking,
running.
Additionally,
demonstrated
effectiveness
measuring
boundary-lengths
irregular
objects,
supporting
applications
robotics.
capacitive
strain
sensor
developed
this
work
provides
new
enable
electronics
textiles
upcoming
era
interactive
human-machine
interfaces
digital
healthcare.
Self-powered
sensing
technology
plays
a
key
role
in
autonomous
and
portable
systems,
with
applications
health
monitoring
robotics.
These
sensors,
which
do
not
rely
on
external
power
sources,
offer
stable,
continuous
data
acquisition
for
real-time
complex
interactions.
For
instance,
triboelectric
nanogenerators
have
enabled
self-powered
wearable
sensors
to
monitor
vital
signs
such
as
heart
beat
rate
respiration
by
converting
body
movement
into
electrical
energy,
eliminating
the
need
batteries.
Despite
their
advantages,
challenges
remain
large-scale
manufacturing,
miniaturization,
multifunctional
integration.
Overcoming
these
may
require
innovative
advances
novel
materials,
intelligent
algorithms,
integration
strategies.
This
perspective
summarizes
recent
existing
technologies
robotics
applications,
provides
an
outlook
future
development.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 22, 2024
Abstract
Flow‐induced
vibrations
(FIVs)
serve
as
the
fundamental
principle
of
non‐rotary
wind
energy
harvesting.
However,
nanogenerators
relying
on
a
single
FIV
effect
remain
constrained
by
insufficient
breeze
conversion
efficiency.
In
this
paper,
we
propose
novel
galloping‐flutter
coupled
nanogenerator
(GFNG)
that
leverages
synergistic
interaction
between
these
two
aerodynamic
phenomena,
to
achieve
high
performance
across
broad
speed
bandwidth.
A
mechanism
(GFM)
is
implemented
using
multifunctional
flexible
beam
integrates
galloping
piezoelectric
harvester
(GPEH)
and
fluttering
triboelectric
(FTENG).
Through
meticulous
optimization,
it
significantly
enhances
average
electrical
output
FTENG
up
six
times
at
low
speeds
below
6
m
s
−1
,
intensifying
contact
behavior
through
galloping‐induced
oscillations.
The
GFNG
demonstrates
maximum
power
6.3
mW
from
1.4
10
along
with
remarkable
density
7.1
W
−2
enhanced
enabling
lighting
508
LEDs
stable
supply
for
wireless
sensor
nodes
(WSNs).
This
study
offers
new
insights
into
designing
high‐performance
aerodynamics‐driven
harnessing
multiple
effects,
broadening
potential
intelligent
applications.
Polymer Composites,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 14, 2025
Abstract
Polymer
percolating
composites
with
negative
permittivity
via
the
construction
of
structures
are
great
interest
in
electromagnetism.
In
this
study,
nano
carbon
powder‐multiwalled
nanotubes/poly(vinylidene
fluoride)
(CP‐MWCNTs/PVDF)
comprising
binary
functional
phases
CP‐MWCNTs
were
fabricated
using
hot‐pressing
method.
The
achieved
both
low
percolation
threshold
and
tunable
properties
across
entire
frequency
range
testing.
Percolation
phenomenon
was
observed
as
content
reaching
5
wt%,
which
reflected
establishment
network
occurrence
electrical
percolation,
resulting
a
shift
toward
metal‐like
conduction
mechanism.
Additionally,
notably
can
be
ascribed
to
synergistic
effect
between
phases.
plasma
oscillation
free
electrons
within
conductive
plays
crucial
role
achieving
permittivity,
that
elucidated
Drude
model
from
electron
theory.
Furthermore,
analyses
impedance
equivalent
circuit
illuminate
connection
dielectric
behavior.
These
findings
further
reveal
influence
phases'
morphology
composition
on
behavior
properties,
while
expanding
application
polymer‐based
electromagnetic
devices.
Highlights
Tunable
related
is
achieved.
Binary
exhibit
threshold.
Synergistic
leads
Materials,
Год журнала:
2025,
Номер
18(3), С. 615 - 615
Опубликована: Янв. 29, 2025
With
the
advent
of
intelligent
era,
flexible
piezoelectric
tactile
sensors,
as
key
components
for
sensing
information
and
transmitting
signals,
have
received
worldwide
attention.
However,
pressure
sensors
are
still
currently
limited,
which
severely
restricts
their
practical
applications.
Furthermore,
demonstrations
conducted
in
labs
not
accurate
to
real-world
scenarios.
Thus,
there
is
an
urgent
need
further
optimize
intrinsic
performance
usage
characteristics
meet
application
requirements.
As
a
representative
piezoelectric,
polyvinylidene
fluoride
(PVDF)
exhibits
significant
advantages
terms
excellent
flexibility,
chemical
stability,
high
electromechanical
conversion,
low
cost,
appropriate
acoustic
impedance,
allow
it
serve
core
matrix
sensors.
This
paper
aims
summarize
very
recent
progress
based
on
PVDF,
including
composition
modulation,
structure
optimization,
Based
comprehensive
summary
studies,
we
propose
rational
perspectives
strategies
regarding
PVDF-based
provide
some
new
insights
research
industrial
communities.
