ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 3, 2025
Ionic
skin
can
mimic
human
to
sense
both
temperature
and
pressure
simultaneously.
However,
a
significant
challenge
remains
in
creating
precise
ionic
skins
resistant
external
stimuli
interference
when
subjected
pressure.
In
this
study,
we
present
an
innovative
approach
address
by
introducing
highly
anisotropic
nanofluidic
(ANIS)
composed
of
carboxylated
cellulose
nanofibril
(CNF)-reinforced
poly(vinyl
alcohol)
(PVA)
nanofibrillar
network
achieved
through
straightforward
one-step
hot
drawing
method.
The
inherent
nanostructures
endowed
the
ANIS
with
modulus
(20.9
±
4.9
MPa)
comparable
that
cartilage
skin,
alongside
higher
fracture
energy
(41.4
0.3
kJ/m2)
fatigue
threshold
(1360
J/m2).
Incorporating
CNF
not
only
improves
negative
potential
but
also
increases
conductivity
up
0.001
S/cm,
even
at
very
low
concentration
(1.0
×
10–6
M).
Furthermore,
exhibits
pressure-independent
sensitivity
due
its
high
deformation-resistant
performance.
Thus,
work
introduces
facile
strategy
for
fabricating
thermosensing
properties,
promising
prospects
practical
healthcare
applications.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(7), P. 7510 - 7519
Published: March 18, 2024
With
the
development
of
wearable
devices,
demand
for
pressure
sensing
has
prompted
flexible
sensors
with
excellent
overall
performance,
especially
piezoresistive
long-term
durability.
In
this
study,
covalently
interconnected
poly(vinyl
alcohol-co-ethylene)
(EVOH)/MWCNTs
composite
nanofibrous
aerogels
typical
"layer–pillar"
hierarchical
porous
structure
were
prepared
by
hydroxyl
aldehyde
condensation
to
cross-link
thermoplastic
nanofibers
and
hydroxylated
carbon
nanotube.
Benefiting
from
robust
bonding
between
EVOH
MWCNTs,
aerogel
exhibited
an
ultralow
density
(18.27
mg/cm3),
compressibility
restorability
(up
80%
strain),
remarkable
fatigue
durability
exceeding
1000
times.
Meanwhile,
compressive
strength
cross-linked
was
increased
a
factor
3.5
compared
un-cross-linked
(9.70
kPa).
The
can
be
assembled
as
sensor,
capacity
up
strain
(corresponding
33.49
kPa)
detection
limit
80
Pa.
Furthermore,
dynamic
sensitivity
sensor
are
GF
=
1.51
S
0.28
kPa–1,
respectively.
More
importantly,
cyclic
stability
resistance
outstanding;
even
after
3000
cycles,
its
curve
remained
essentially
consistent
initial
50
cycles.
These
successes
ensure
performance
EVOH/MWCNTs
sensitive
monitoring
mechanical
signals,
such
body
posture
monitoring,
show
great
potential
next
generation
electronics.
Frontiers in Materials,
Journal Year:
2024,
Volume and Issue:
11
Published: April 25, 2024
Piezoelectric
materials
have
become
a
key
component
in
sensors
and
actuators
many
industrial
fields,
such
as
energy
harvesting
devices,
self-powered
structures,
biomedical
nondestructive
testing,
owing
to
the
novel
properties
including
high
piezoelectric
coefficient
electromechanical
coupling
factors.
thin
films
integrated
on
silicon
substrates
are
widely
investigated
for
their
performance
low
manufacturing
costs
meet
requirement
of
sensor
networks
internet
things
(IoT).
The
aim
this
work
is
clarify
application
design
structure
various
types,
synthesis
methods,
device
processes.
Based
latest
literature,
process
fabricating
film
outlined,
followed
by
concise
overview
techniques
used
microelectromechanical
systems
(MEMS)
processing
that
can
integrate
more
complex
functions
obtain
relevant
information
surrounding
environment.
Additionally,
addressing
cutting-edge
technology
with
ability
produce
electronic
delivers
incisive
conclusions
all
aspects
related
features.
A
greater
understanding
piezoelectricity
necessary
regarding
future
development
industry
challenges.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(45), P. 62617 - 62626
Published: Oct. 29, 2024
Self-powered
sensors,
capable
of
detecting
static
and
dynamic
pressure
without
an
external
power
source,
are
pivotal
for
advancements
in
human–computer
interaction,
health
monitoring,
artificial
intelligence.
Current
sensing
technologies,
however,
often
fall
short
meeting
the
growing
needs
precise
timely
monitoring.
This
article
introduces
a
novel
self-powered
sensor
utilizing
electrochemical
reactions.
The
sensor's
ion
conduction
path
internal
resistance
adjust
response
to
stress
across
broad
range.
Its
three-dimensional
structure,
crafted
by
using
simple
template
on
electrolyte,
enables
efficient
cost-effective
detection
various
mechanical
stimuli.
device
not
only
achieves
optimized
density
approximately
2.34
mW
cm–2─surpassing
most
existing
technologies─but
also
features
excellent
flexibility,
quick
response,
recovery
times
(0.15
0.19
s
respectively);
high
durability
(2000
cycles);
range
(0.23–20
kPa).
Moreover,
it
serves
as
ionic
touchpad,
enhancing
data
collection
recognition,
integrates
seamlessly
with
mouthpiece
accurate,
real-time
monitoring
respiratory
activities.
innovative
offers
minimal
cost
process
requirements
while
providing
multifunctional
capabilities
energy
harvesting
sensing,
marking
significant
step
forward
design
next-generation
sensors.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 4, 2024
Abstract
The
unique
selective
ion‐transport
characteristics
of
nanofluids
make
them
applicable
in
energy
harvesting
and
sensing.
However,
developing
scalable,
self‐powered
nanofluidic
devices
remains
challenging
due
to
high
cost,
processing
complexity,
reliance
on
external
power
sources.
In
this
work,
surface‐twisted,
internally
aligned
algae
fibers
(twisted
fibers)
are
fabricated
using
an
asymmetric
flow
field
regulate
the
assembly
process
cellulose
nanofibers.
Unlike
from
symmetrical
process,
flow‐mediated
twisted
exhibit
a
significantly
reduced
diameter
(33.6–20.4
µm),
increased
packing
density
(0.87–1.47
g
cm
−3
),
superior
fractured
stress
(249.4–468.5
MPa),
enhanced
Herman's
orientation
parameter
(from
0.77
0.89).
Importantly,
demonstrate
energy‐harvesting
up
12.87
W
m
−2
under
50‐fold
salinity
gradient
can
serve
as
urine
monitors,
effectively
distinguishing
infants'
urination
motility
behaviors
alerting
saturation
ionic
conductivity
(7.8
mS
−1
)
at
dilute
electrolyte
concentrations.
This
study
provides
novel
design
concept
for
biomass‐based
health
sensing
system.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 3, 2025
Ionic
skin
can
mimic
human
to
sense
both
temperature
and
pressure
simultaneously.
However,
a
significant
challenge
remains
in
creating
precise
ionic
skins
resistant
external
stimuli
interference
when
subjected
pressure.
In
this
study,
we
present
an
innovative
approach
address
by
introducing
highly
anisotropic
nanofluidic
(ANIS)
composed
of
carboxylated
cellulose
nanofibril
(CNF)-reinforced
poly(vinyl
alcohol)
(PVA)
nanofibrillar
network
achieved
through
straightforward
one-step
hot
drawing
method.
The
inherent
nanostructures
endowed
the
ANIS
with
modulus
(20.9
±
4.9
MPa)
comparable
that
cartilage
skin,
alongside
higher
fracture
energy
(41.4
0.3
kJ/m2)
fatigue
threshold
(1360
J/m2).
Incorporating
CNF
not
only
improves
negative
potential
but
also
increases
conductivity
up
0.001
S/cm,
even
at
very
low
concentration
(1.0
×
10–6
M).
Furthermore,
exhibits
pressure-independent
sensitivity
due
its
high
deformation-resistant
performance.
Thus,
work
introduces
facile
strategy
for
fabricating
thermosensing
properties,
promising
prospects
practical
healthcare
applications.
