Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 31, 2024
The
demand
for
temperature-robust
electromagnetic
wave
(EMW)
absorption
materials
is
escalating
due
to
the
varying
operational
temperatures
of
electronic
devices,
which
can
easily
soar
up
100
°C,
significantly
affecting
EMW
interference
management.
Traditional
absorbers
face
performance
degradation
across
broad
temperature
ranges
alterations
in
mobility
and
material
impedance.
This
study
presented
a
novel
approach
by
integrating
semiconductor
metal-organic
frameworks
(SC-MOFs)
with
paraffin
wax
(PW),
leveraging
precise
control
interlayer
spacing
SC-MOFs
electron
regulation
introduction
temperature-inert
properties.
synergistic
strategy
enhanced
dielectric
properties
impedance
matching
from
ambient
°C.
A
metamaterial
shell
layer,
designed
through
finite
element
simulation
fabricated
3D
printing,
encapsulated
composite,
resulting
broadband
absorber
an
11.81
GHz
effective
bandwidth
nearly
unchanged
peak
position
25-100
paves
way
advanced
management
capable
operating
reliably
extreme
environments.
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.
Carbon,
Journal Year:
2024,
Volume and Issue:
229, P. 119513 - 119513
Published: Aug. 8, 2024
With
rapid
technological
advancements,
electromagnetic
radiation
is
becoming
one
of
new
forms
pollution,
which
not
only
affects
the
use
precision
instruments,
but
also
threatens
safety
human
life.
Electromagnetic
wave
(EMW)
absorbing
material
can
effectively
attenuate
EMW,
among
carbon
fiber
doped
magnetic
particles
possess
low
density,
multiple
attenuation,
and
magnetic-dielectric
synergy,
attracting
more
attention.
Carbon-based
fibers
achieve
combination
loss
dielectric
loss,
improve
impedance
match,
resulting
in
excellent
reflection
(RL)
effective
absorption
bandwidth
(EAB).
Herein,
recent
researches
on
carbon-based
are
reviewed,
focusing
preparation
methods
structural
difference.
It
specifically
introduces
their
performance
advantages,
providing
a
brief
analysis
structure-property
relationship.
Finally,
extensive
application
potential
emphasize,
highlighting
challenges
opportunities
field
EMW
absorption.
Advanced Materials Interfaces,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 12, 2025
Abstract
With
the
advent
of
high‐power
electronic
devices,
communication
satellites,
and
military
radar
systems,
electromagnetic
(EM)
waves
have
caused
significant
pollution.
In
this
work,
hollow
Fe
3
O
4
@C
(H‐FO@C)
composites
are
synthesized
by
employing
an
in
situ
polymerization
carbonization
treatment.
Effects
temperature
on
wave
absorption
core‐shell
structured
H‐FO@C
symmetrically
analyzed,
impedance
matching
attenuation
ability
improved
significantly
controlling
temperature.
The
reflection
loss
(RL)
effective
bandwidth
(EAB)
carbonized
at
650
°C
to
−51.85
dB
5.36
GHz
(thickness
2.1
mm),
respectively.
When
thickness
increases
from
2.4
mm,
EAB
reaches
6.24
GHz.
According
CST
Studio
Suit,
cross
section
(RCS)
reduction
value
can
be
24.26
m
2
for
composites.
Both
experiment
simulation
results
confirm
that
possess
excellent
EWA
performance.
This
work
provides
a
new
way
advancing
materials.
Reactive and Functional Polymers,
Journal Year:
2024,
Volume and Issue:
202, P. 106000 - 106000
Published: June 26, 2024
To
enhance
the
anticorrosive
performance
of
coatings
in
harsh
corrosive
environments,
a
graphene/isophorone
diisocyanate
(IPDI)
microcapsule
is
prepared
by
in-situ
polymerization.
The
self-healing
and
based
on
these
microcapsules
are
studied.
with
cross-linked
shells
this
study
solves
problems
excessive
size
insufficient
strength
traditional
microcapsules.
addition
improves
coatings.
shape
form
round
balls,
average
particle
thickness
range
17–23
μm
0.5–3.4
μm,
which
conducive
to
preparation
20.64
MPa
wrap-around
rate
reaches
68%.
have
an
initial
evaporation
temperature
231.3
°C,
graphene
organic
cross-linking
shell
enhances
thermal
stability
electrochemical
impedance
spectroscopy
(EIS)
indicates
that
|Z|f=0.01
Hz
value
coating
10
wt%
after
168
h
immersion
about
9.4
×
109
Ω
cm2,
nearly
three
orders
magnitude
higher
than
without
(6.9
106
cm2).
Monitoring
artificial
scratches
using
scanning
electron
microscope
(SEM)
for
24
reveals
repairs
cracks
well.
It
demonstrated
incorporation
graphene/IPDI
anti-corrosive
coating.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 9, 2024
Abstract
In
non‐metallic
atom‐doped
carbonaceous
materials,
the
disparity
in
electronegativity
between
doped
constituents
and
carbon
atoms
predetermines
bonding
topology
of
covalent
bonds
distribution
electron
density.
This,
consequently,
influences
polarization
transport
behavior
within
domain
electromagnetic
wave
attenuation
attributes
material.
However,
influence
formed
by
doping
with
weakly
electronegative
on
density
distribution,
effects,
remains
uncharted.
To
address
this
deficiency,
study
fabricates
a
porous
material
(NCP)
incorporates
boron‐doped
to
form
tunable
B─C
configurations
(B‐NCP).
By
modulating
configuration
proportion,
it
is
feasible
achieve
synergistic
optimization
conductive
loss
B‐NCP
specimen.
The
optimized
prototype
‐1200
sample
displays
exceptionally
efficient
absorption
capabilities
minimum
reflection
(RL
min
)
−52.03
dB
an
effective
bandwidth
(EAB)
5.36
GHz.
This
presents
conscientious
model
for
comprehending
mechanisms
associated
atom
carbon‐based
wave‐absorbing
materials.
