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.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: Oct. 9, 2023
Cobalt
nickel
bimetallic
oxides
(NiCo2O4)
have
received
numerous
attentions
in
terms
of
their
controllable
morphology,
high
temperature,
corrosion
resistance
and
strong
electromagnetic
wave
(EMW)
absorption
capability.
However,
broadening
the
bandwidth
is
still
a
huge
challenge
for
NiCo2O4-based
absorbers.
Herein,
unique
NiCo2O4@C
core-shell
microcubes
with
hollow
structures
were
fabricated
via
facile
sacrificial
template
strategy.
The
concentration
oxygen
vacancies
morphologies
three-dimensional
(3D)
cubic
framework
effectively
optimized
by
adjusting
calcination
temperature.
specially
designed
3D
structure
facilitated
multiple
reflections
incident
waves
provided
rich
interfaces
between
components,
generating
significant
interfacial
polarization
losses.
Dipole
polarizations
induced
could
further
enhance
attenuation
ability
EM
waves.
exhibit
superior
EMW
capability
minimum
RL
(RLmin)
-84.45
dB
at
8.4
GHz
thickness
3.0
mm.
Moreover,
ultrabroad
effective
(EAB)
as
large
12.48
(5.52-18
GHz)
obtained.
This
work
believed
to
illuminate
path
synthesis
high-performance
cobalt
absorbers
excellent
capability,
especially
bandwidth.
