Sensors,
Год журнала:
2024,
Номер
24(22), С. 7370 - 7370
Опубликована: Ноя. 19, 2024
Wearable
devices
have
revolutionized
real-time
health
monitoring,
yet
challenges
persist
in
enhancing
their
flexibility,
weight,
and
accuracy.
This
paper
presents
the
development
of
a
wearable
device
employing
conductive
polyacrylamide-lithium
chloride-MXene
(PLM)
hydrogel
sensor,
an
electronic
circuit,
artificial
intelligence
(AI)
for
gait
monitoring.
The
PLM
sensor
includes
tribo-negative
polydimethylsiloxane
(PDMS)
tribo-positive
polyurethane
(PU)
layers,
exhibiting
extraordinary
stretchability
(317%
strain)
durability
(1000
cycles)
while
consistently
delivering
stable
electrical
signals.
weighs
just
23
g
is
strategically
affixed
to
knee
brace,
harnessing
mechanical
energy
generated
during
motion
which
converted
into
These
signals
are
digitized
then
analyzed
using
one-dimensional
(1D)
convolutional
neural
network
(CNN),
achieving
impressive
accuracy
100%
classification
four
distinct
patterns:
standing,
walking,
jogging,
running.
demonstrates
potential
lightweight
energy-efficient
sensing
combined
with
AI
analysis
advanced
biomechanical
monitoring
sports
healthcare
applications.
In
recent
years,
flexible
pressure
sensors
have
played
an
increasingly
important
role
in
human
health
monitoring.
Inspired
by
traditional
papermaking
techniques,
we
developed
a
highly
flexible,
low-cost,
and
ecofriendly
sensor
using
shredded
paper
fibers
as
the
substrate.
By
combining
properties
of
laser-induced
graphene
with
structure
fibers,
improved
internal
pressure-sensitive
designed
conical
surface
microstructure,
providing
new
insights
into
nanomaterial
engineering.
It
features
low
resistance
(424.44
Ω),
energy
consumption
only
0.367
μW
under
1.96
kPa,
high
sensitivity
(1.68
kPa-1),
wide
monitoring
range
(98
Pa-111.720
kPa).
The
microstructure
(MFTG)
this
study
has
total
thickness
comparable
to
A4
paper,
is
soft
bendable,
can
be
cut
any
shape
like
fit
body,
holds
great
potential
for
continuous
activity
status
physiological
information.
This
paper
systematically
investigated
the
microfluidic
chip
with
inertial
contraction
and
expansion
channels
based
on
numerical
simulation
methods.
The
influence
of
geometric
shape
changes
particle
separation
effect
was
focused
on.
We
varied
microchannel
structural
parameters
such
as
channel
length
width,
overall
curvature
microchannel.
results
indicated
that
different
structures
hold
diverse
effects
recovery
rate.
An
appropriate
shrinkage–expansion
ratio
can
improve
effect.
In
microchannel,
we
found
six
seven
are
optimal
structure,
which
capable
achieving
effective
three
types
particles.
vortex
structure
in
dramatically
impacts
focusing
width
particles
distance
particles,
may
be
considered
internal
mechanism
to
explain
trajectory
channel.
Furthermore,
has
a
great
rate
As
degree
bending
leaps,
will
first
decrease
then
increase.
study
establishes
theoretical
foundation
for
understanding
interaction
between
diversifications
chips
efficiency.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(37), С. 49834 - 49844
Опубликована: Сен. 4, 2024
Hydrogel,
as
a
promising
material
for
wide
range
of
applications,
has
demonstrated
considerable
potential
use
in
flexible
wearable
devices
and
engineering
technologies.
However,
simultaneously
realizing
the
ultrastretchability,
low
hysteresis,
high
toughness
hydrogels
is
still
great
challenge.
Here,
we
present
dual
physically
cross-linked
polyacrylamide
(PAM)/sodium
hyaluronate
(HA)/montmorillonite
(MMT)
hydrogel.
The
introduction
HA
increases
degree
chain
entanglement,
addition
MMT
acts
stress
dissipation
center
cross-linking
agent,
resulting
hydrogel
with
hysteretic
properties.
This
synthesized
by
simple
strategy
exhibited
ultrahigh
stretchability
(3165%),
breaking
(228
kPa),
(4.149
MJ/m
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 26, 2025
Wirelessly
driven
flexible
actuators
are
crucial
to
the
development
of
robotic
crawling.
However,
great
challenges
still
remain
for
crawling
in
complex
environments.
Herein,
we
reported
a
wireless
actuator
synergistically
by
power
transmission
(WPT)
technology
and
near-infrared
(NIR)
light,
which
consists
poly(dimethylsiloxane)-graphene
oxide
(PDMS-GO)
composite
layer,
eutectic
gallium-indium
alloy
(EGaIn),
PDMS
polyimide
(PI)
layer.
By
optimizing
parameters
EGaIn
concentration
PDMS-GO
film,
has
excellent
bending
ability
blocking
force
under
different
conditions
photoelectronic
synergy.
In
addition,
fabricated
robot
with
high
environmental
adaptability
adding
structures
at
both
ends
actuator,
causes
discrepancy
friction
between
front
rear
feet.
The
stability,
large
deformation,
wirelessly
on
plane,
slope,
plane
roughnesses.
This
work
provides
an
idea
application
robots
Applied Sciences,
Год журнала:
2025,
Номер
15(7), С. 3854 - 3854
Опубликована: Апрель 1, 2025
In
order
to
meet
new
real-world
emissions
standards
and
reduce
particulates
emitted
by
GDI
engines,
automakers
are
increasingly
adopting
gasoline
particulate
filters
(GPFs).
The
uniformity
of
axial
permeation
velocity
through
porous
medium
in
GPFs
significantly
impacts
filtration
efficiency.
Consequently,
a
three-dimensional
single-channel
GPF–CFD
model
is
developed
investigate
the
impact
partition
coatings
pins
on
flow
characteristics.
Different
coating
amounts
compared
adjusting
porosity
using
GPF
model,
with
strategically
placed
along
upper
lower
sides
inlet
channel.
Simulation
results
indicate
that
optimizing
length
across
different
coated
sections
enhances
consistency
velocity,
particularly
when
ratio
falls
within
range
30–40%.
Pins
variance
increasing
near
surface,
symmetrical
arrangement
four
pairs
height
0.3
mm
yielding
optimal
performance.
Moreover,
combination
partitions
shows
potential
improve
maximum
homogeneity
approximately
75%.
Journal of Laser Applications,
Год журнала:
2025,
Номер
37(2)
Опубликована: Апрель 7, 2025
The
demanding
service
environment
of
feed
screws
in
injection
molding
machines,
characterized
by
metal
friction,
extrusion,
and
polymer
corrosion,
necessitates
enhanced
hardness,
wear
resistance,
corrosion
resistance.
Traditional
strengthening
methods
involve
nickel-based
coating
followed
nitriding,
yet
iron-based
coatings,
which
are
more
cost-effective.
This
study
compares
laser-clad
alloy
coatings
with
those
postgas
utilizing
various
characterization
techniques
to
assess
changes
microhardness,
metallography,
phase
composition,
elemental
distribution.
nitriding
process
significantly
alters
the
microstructure
microhardness
forming
a
distinct
nitride
layer
transition
layer.
Nitrogen
ions
penetrate
surface,
γ′-Fe4N
ɛ-Fe2-3N
phases
upon
saturation,
resulting
200
μm-thick
5
μm
compound
at
surface
diffusion
primarily
α-Fe(N).
γ′
achieves
maximum
1214.1
HV
near
decreases
depth
nitrogen
content
reduction.
At
180
depth,
reverts
prenitriding
levels
850
HV.
Below
layer,
absence
leads
ferrite
decomposition
further
reduction
an
average
drop
from
811.4
480.9
Furthermore,
disproportionate
ratio
within
ɛ/γ′
dual-phase
system
results
marked
deterioration
resistance
nitrided
specimens.
imbalance
induces
microstructural
incompatibilities,
compromising
both
tribological
performance
electrochemical
stability
under
operational
conditions.
Micromachines,
Год журнала:
2025,
Номер
16(5), С. 513 - 513
Опубликована: Апрель 27, 2025
Flexible
wearable
strain
sensors
demonstrate
promising
application
prospects
in
health
monitoring,
human-machine
interaction,
motion
tracking,
and
the
detection
of
human
physiological
signals.
Although
laser-induced
graphene
(LIG)
materials
have
been
extensively
utilized
these
scenarios,
traditional
types
LIG
are
constrained
by
intrinsic
limitations,
including
discontinuous
conductive
networks
electromechanical
responsive
hysteresis.
These
limitations
hinder
their
applications
micro-strain
scenarios.
Consequently,
enhancing
performance
LIG-based
has
become
a
crucial
priority.
To
address
this
challenge,
we
developed
novel
MXene/LIG
composite
featuring
optimized
interfacial
coupling
effects
through
systematic
enhancement
LIG.
The
flexible
sensor
fabricated
using
exhibits
exceptional
performance,
an
ultra-low
sheet
resistance
14.1
Ω,
high
sensitivity
20.7,
limit
0.05%,
rapid
response
time
approximately
65
ms.
improvements
significantly
enhance
responsiveness
sensitivity.
Furthermore,
remarkable
stability
under
varying
tensile
strains,
particularly
showing
outstanding
repeatability
across
2500
cyclic
tests.
Notably,
when
applied
to
pilot
monitoring
MXene/LIG-based
demonstrates
robust
capability
detecting
body
movement
signals
such
as
micro-expressions
joint
movements.
This
establishes
highly
effective
technological
solution
for
real-time
pilots'
states
during
operational
