Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 28, 2025
Abstract
The
absorption
performance
of
electromagnetic
(EM)
wave
absorbing
materials
deteriorates
sharply
at
large
incident
angles,
particularly
angles
exceeding
50°.
To
overcome
this
challenge,
study
proposes
a
bionic
grooving
all‐cementitious‐dielectric
metastructure
(ACDMS),
yielding
more
than
34.6
GHz
effective
bandwidth
(
EAB
)
over
0°–60°
without
any
agent.
effects
structural
design,
geometric
parameters,
and
on
the
EM
response
are
investigated
by
numerical
simulations
experimental
characterizations.
It
is
found
that
ACDMS
enables
multiple
mechanisms
under
various
including
electric
field
redistribution,
multi‐axis
interference,
surface
excitation,
diffraction/scattering
pathways.
Experimental
results
demonstrate
60°
angle,
even
exceeds
normal
incidence,
achieving
relative
163%,
‐20
dB
(99%
absorption)
33.4
GHz,
mean
reflectivity
−23.4
in
1–40
range.
RCS
simulation
environmental
testing
across
fluctuating
humidity
(40%–80%)
temperature
(10–220
°C)
exposures
underscore
exceptional
potential
for
practical
applications
harsh
conditions.
combination
innovative
mechanisms,
adaptability
convenient
cement‐based
manufacturing
process
establishes
as
promising
candidate
next‐generation
absorbers.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(9)
Published: Nov. 14, 2023
Abstract
Optimization
of
components
and
micromorphology
regulation
are
shown
to
be
effective
in
boosting
electromagnetic
wave
absorption
(EMWA).
One
approach
achieve
this
enhancement
is
by
utilizing
the
polarization
effects
heterogeneous
interfaces.
Herein,
NiSe
2
‐CoSe
@C@MoSe
composites
derived
from
NiCo‐MOF‐74
fabricated
via
a
facile
selenization
reaction
subsequent
hydrothermal
method.
By
varying
mass
ratios
@C
MoSe
,
series
with
hierarchical
flower‐like
core–shell
structures
obtained.
The
EMWA
properties
display
trend
initially
increasing
then
decreasing
content
.
Interestingly,
when
ratio
3:2,
minimum
reflection
loss
(RL)
value
−50.10
dB
an
bandwidth
(RL<
−10
dB)
can
reach
4.80
GHz
(13.20–18.00
GHz).
remarkable
capability
ascribed
synergy
conductive
loss,
suitable
impedance
matching.
This
work
establishes
new
pathway
for
synthesis
transition
metal
dichalcogenides‐based
composites,
which
hold
great
promise
as
high‐performance
materials
applications.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
16(1)
Published: Nov. 17, 2023
Abstract
Carbon-based
aerogels
derived
from
biomass
chitosan
are
encountering
a
flourishing
moment
in
electromagnetic
protection
on
account
of
lightweight,
controllable
fabrication
and
versatility.
Nevertheless,
developing
facile
construction
method
component
design
with
carbon-based
for
high-efficiency
wave
absorption
(EWA)
materials
broad
effective
bandwidth
(EAB)
strong
yet
hits
some
snags.
Herein,
the
nitrogen-doped
magnetic-dielectric-carbon
aerogel
was
obtained
via
ice
template
followed
by
carbonization
treatment,
homogeneous
abundant
nickel
(Ni)
manganese
oxide
(MnO)
particles
situ
grew
carbon
aerogels.
Thanks
to
optimization
impedance
matching
dielectric/magnetic
components
aerogels,
(Ni/MnO-CA)
suggests
praiseworthy
EWA
performance,
an
ultra-wide
EAB
7.36
GHz
minimum
reflection
loss
(RL
min
)
−
64.09
dB,
while
achieving
specific
253.32
dB
mm
−1
.
Furthermore,
reveals
excellent
radar
stealth,
infrared
thermal
management
capabilities.
Hence,
high-performance,
easy
fabricated
multifunctional
nickel/manganese
oxide/carbon
have
application
aspects
protection,
electronic
devices
aerospace.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
17(1)
Published: Sept. 22, 2024
Abstract
Gradient
magnetic
heterointerfaces
have
injected
infinite
vitality
in
optimizing
impedance
matching,
adjusting
dielectric/magnetic
resonance
and
promoting
electromagnetic
(EM)
wave
absorption,
but
still
exist
a
significant
challenging
regulating
local
phase
evolution.
Herein,
accordion-shaped
Co/Co
3
O
4
@N-doped
carbon
nanosheets
(Co/Co
@NC)
with
gradient
been
fabricated
via
the
cooperative
high-temperature
carbonization
low-temperature
oxidation
process.
The
results
indicate
that
surface
epitaxial
growth
of
crystal
Co
domains
on
nanoparticles
realizes
adjustment
magnetic-heteroatomic
components,
which
are
beneficial
for
matching
interfacial
polarization.
Moreover,
simultaneously
realize
coupling,
long-range
diffraction.
Specifically,
synthesized
@NC
absorbents
display
strong
attenuation
capability
−
53.5
dB
at
thickness
3.0
mm
an
effective
absorption
bandwidth
5.36
GHz,
both
superior
to
those
single
embedded
matrix.
This
design
concept
provides
us
inspiration
polarization,
coupling
absorption.
Small,
Journal Year:
2024,
Volume and Issue:
20(48)
Published: Aug. 28, 2024
Abstract
The
intrinsic
limitation
of
low
electrical
conductivity
MoSe
2
resulted
in
inferior
dielectric
properties,
which
restricts
its
electromagnetic
wave
absorption
(EMWA)
performances.
Herein,
a
bimetallic
selenide
/CoSe
@N‐doped
carbon
(NC)
composites
with
hollow
core‐branch
nanostructures
are
synthesized
via
the
selenization
treatment
MoO
3
nanorods
coated
ZIF‐67.
By
adjusting
mass
ratio
ZIF‐67
to
,
parameters
and
morphologies
finely
tuned,
further
ameliorating
impedance
matching
EMWA
involvement
NC
improves
electronic
composites.
synchronously
formed
heterostructure
not
only
facilitates
charge
transfer
but
also
leads
accumulation
uneven
distribution
charges,
thus
enhancing
conductive
loss
polarization
loss.
nanostructure
provides
abundant
networks,
heterointerfaces,
voids,
significantly
property.
Density
functional
theory
implies
that
heterostructures
effectively
boost
transport
change
distribution,
heightens
As
result,
demonstrate
minimum
reflection
value
−53.53
dB
at
9.04
GHz,
alongside
maximum
effective
bandwidth
6.32
GHz.
This
work
offers
invaluable
insights
into
novel
structural
designs
for
future
research
applications.
