ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(44), С. 61157 - 61168
Опубликована: Окт. 29, 2024
Liquid
metal
(LM)-based
composites
hold
promise
for
soft
electronics
due
to
their
high
conductivity
and
fluidic
nature.
However,
the
presence
of
{\alpha}_Ga2O3
GaOOH
layers
around
LM
droplets
impairs
performance.
We
tackle
this
issue
by
replacing
oxide
layer
with
conductive
silver
(Ag)
using
an
ultrasonic_assisted
galvanic
replacement
reaction.
The
Ag_coated
nanoparticles
form
aggregated,
porous
microparticles
that
are
mixed
styrene_isoprene_styrene
(SIS)
polymers,
resulting
in
a
digitally
printable
composite
superior
electrical
electromechanical
properties
compared
conventional
fillers.
Adding
more
enhances
these
further.
achieves
EMI
shielding
effectiveness
(SE)
exceeding
75
dB
X_band
frequency
range,
even
at
200
per
cent
strain,
meeting
stringent
military
medical
standards.
It
is
applicable
wireless
communications
Bluetooth
signal
blocking
as
thermal
interface
material
(TIM).
Additionally,
we
highlight
its
recyclability
biodegradable
solvent,
underscoring
eco_friendly
potential.
This
represents
significant
advancement
stretchable
shielding,
implications
wearable
bioelectronic
applications.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 12, 2024
Abstract
In
contemporary
times,
radar
and
infrared‐compatible
stealth
materials
have
emerged
as
a
pivotal
domain
of
research
globally,
aimed
at
augmenting
the
survivability
military
assets.
However,
current
candidates
generally
exhibit
subpar
compatibility
performance
in
elevated
temperature
environments
due
to
imbalanced
interplay
between
two
spectral
bands.
this
work,
meticulously
designed
sandwich‐structure
SiO
2
/C@SiC/SiO
composite
is
proposed
cope
with
challenge.
The
middle
layer
C@SiC
composites
possesses
excellent
microwave
absorption
even
high
temperatures.
outer
layers
aerogels
serve
not
only
inhibit
infrared
radiation
intensity,
but
also
reinforce
capacity
by
optimizing
impedance
matching
reducing
heat
transferred
layer.
Based
on
numerical
simulation
outcomes,
thickness
each
has
been
optimized
attain
harmonious
balance
properties.
Ultimately,
sandwich
structured
demonstrate
low
RL
(reflection
loss)
values
(←5
dB)
across
nearly
entire
X
band
(8–12
GHz),
alongside
minimal
surface
temperatures
hovering
≈44
°C
an
ambient
200
°C.
comprehensive
investigation
into
impact
patterns
underlying
mechanisms
offers
invaluable
insights
develop
for
high‐temperature
applications,
which
can
be
applied
coatings
skin
Mach
number
aircraft.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 27, 2024
Abstract
Absorption
bandwidth
is
one
of
the
key
performance
metrics
for
electromagnetic
wave
(EMW)
absorbers.
Traditional
oxide
absorbers,
despite
their
merits
such
as
abundance,
long‐term
stability,
and
low
cost,
have
long
been
plagued
by
inferior
absorption
(typically
less
than
4
GHz).
Herein,
a
novel
concept
proposed:
introduction
cation
vacancies
heterostructures
into
oxides
can
remarkably
broaden
bandwidth.
A
broadening
value
7.75
GHz
observed
through
this
route,
surpassing
achieved
other
existing
engineering
methods,
≈100%.
Crucially,
study
discovers
that
negative
shift
in
d
‐band
center,
previously
overlooked
factor,
responsible
phenomenon.
By
inducing
heterostructures,
center
gives
rise
to
an
increase
carrier
concentration
promotion
charge
separation,
resulting
higher
conductive
polarization
losses,
ultimately
leading
broader
The
applicability
validated
another
distinctly
different
system,
where
also
experiences
remarkable
(from
0
6.86
This
offers
significant
implications
designing
wide
EMW
absorbers
expands
applications
various
scenarios
wearable
electronics
artificial
intelligent
devices.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 9, 2024
Abstract
Porous
materials
emerging
as
potential
high‐efficiency
electromagnetic
(EM)
wave
absorbers
confront
a
critical
trade‐off
between
impedance
matching
and
attenuation
capability.
In
this
study,
versatile
strategy
is
reported
to
overcome
challenge
by
constructing
gradient
pores
via
solvent‐assisted
linker
exchange
for
the
fabrication
of
metal‐organic
framework
(MOF)
derived
Fe/Fe
3
Co
7
/Co/C
composites
with
high
porosity.
The
characteristics
single‐pored
gradient‐pored
derivatives
are
investigated
through
combined
experimental
simulation
approaches.
Simulated
space
EM
field,
loss
density,
Smith
charts
reveal
significantly
enhanced
interactions
optimized
within
pores.
Compared
individual
MOF
derivatives,
derivative
exhibits
improved
from
large‐pored
shell
superior
capability
small‐pored
core,
giving
rise
Pareto
improvement
in
absorption
strong
reflection
(−64.7
dB)
wide
effective
adsorption
bandwidth
(5.8
GHz)
at
thickness
2.5
mm.
This
work
not
only
advances
novel
pore
efficient
capability,
but
also
sheds
light
on
underlying
mechanisms
interaction
varied
porosity,
offering
insights
extended
designs
magnetic,
electric
optic
devices.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 13, 2025
Flexible
electronic
circuits
are
critical
in
biomedical
devices,
human–machine
interfaces,
and
wearable
sensing
systems,
which
further
require
flexible
conductive
materials
with
high
conductivity,
stretchability,
electrical
stability.
Liquid
metal
(LM)
has
attracted
much
attention
due
to
its
unique
metallic
conductivity
room-temperature
fluidic
properties.
However,
LM's
surface
tension
properties
increase
the
difficulty
of
patterning
processing.
Here,
we
report
a
scalable
simple
fabrication
method
based
on
femtosecond
laser
ablation
for
facile
patterned
LM
Cu
composite
electrodes
(LM@Cu)
substrates.
The
LM@Cu
electrodes,
fabricated
utilizing
exceptional
micro–nanoprocessing
precision
three-dimensional
capabilities
lasers,
exhibit
resolution
(approximately
5
μm),
superior
(4.08
×
104
S/cm),
enhanced
In
addition
planar
circuits,
successfully
3D-patterned
electrode
PDMS
hemispheres.
presence
ultrathin
copper
foils
significantly
improves
wettability
substrate,
occurrence
alloying
reactions
between
circumvents
challenges
posed
by
pattern
fabrication.
We
investigated
electromechanical
under
twisting,
bending,
stretching
detail.
addition,
serve
as
an
interface
rigid
devices
When
suffering
external
damage,
remain
working
after
brush
coating
excellent
fluidity
LM.
To
explore
this
approach's
potential,
demonstrate
various
applications
electronics,
including
stretchable
luminous
wristbands,
strain
sensors,
"visible"
thermotherapy
panels
relieving
aching
joints.
Nano Letters,
Год журнала:
2024,
Номер
24(35), С. 10883 - 10891
Опубликована: Авг. 22, 2024
The
development
of
electronic
skin
(e-skin)
emulating
the
human
skin's
three
essential
functions
(perception,
protection,
and
thermoregulation)
has
great
potential
for
human–machine
interfaces
intelligent
robotics.
However,
existing
studies
mainly
focus
on
perception.
This
study
presents
a
novel,
eco-friendly,
mechanically
robust
e-skin
replicating
functions.
is
composed
Ti3C2Tx
MXene,
polypyrrole,
bacterial
cellulose
nanofibers,
where
MXene
nanoflakes
form
matrix,
nanofibers
act
as
filler,
polypyrrole
serves
conductive
"cross-linker".
design
allows
customization
electrical
conductivity,
microarchitecture,
mechanical
properties,
integrating
sensing
(perception),
EMI
shielding
(protection),
thermal
management
(thermoregulation).
optimal
can
effectively
sense
various
motions
(including
minuscule
artery
pulses),
achieve
an
efficiency
63.32
dB
at
78
μm
thickness,
regulate
temperature
up
to
129
°C
in
30
s
2.4
V,
demonstrating
its
smart
robotics
complex
scenarios.
