National Science Review,
Journal Year:
2024,
Volume and Issue:
12(2)
Published: Nov. 22, 2024
ABSTRACT
The
design
and
fabrication
of
high-performance
electromagnetic
wave
(EMW)
absorbing
materials
are
essential
in
developing
electronic
communication
technology
for
defense
civilian
applications.
These
function
by
interacting
with
EMWs,
creating
various
effects
such
as
polarization
relaxation,
magnetic
resonance,
hysteresis
order
to
absorb
EMWs.
Significant
progress
has
been
made
improve
the
dimensional
performance
materials,
emphasizing
‘thin,
light,
broad,
strong’
functional
specifications.
One-dimensional
(1D)
nanostructures
characterized
high
surface
area,
low
density,
unique
properties,
providing
promising
solutions
address
some
challenges
facilitating
multiple
reflections
wideband
resonances,
which
crucial
effective
EMW
attenuation.
This
paper
provides
an
overview
recent
advances
exploring
1D
structures
enhancing
absorption
their
controllability.
nanofibers,
nanowires,
other
highlighted.
advantages
nanomaterials
also
described.
Challenges
future
directions
discussed,
focusing
on
new
concepts
methods
achieving
lightweight
absorbers
fundamental
understanding
mechanisms.
Journal of Materiomics,
Journal Year:
2024,
Volume and Issue:
11(2), P. 100881 - 100881
Published: May 23, 2024
It
is
still
an
enormous
challenge
to
regulate
microstructure
of
pure
carbonaceous
electromagnetic
(EM)
wave
absorbents
in
order
gain
superior
wideband
microwave
absorption
(MA)
with
environmentally
adaptive
ability.
Herein,
the
novel
cellulose-derived
graphite
carbon
materials
(CGC)
abundant
defects
were
fabricated
via
self-assembly
strategy
combined
simple
carbonization
for
first
time.
The
EM
and
MA
performance
as-prepared
CGC
different
temperatures
studied
detail.
minimum
reflection
loss
was
up
–46.2
dB
(over
99.99%
MA)
at
only
1.42
mm,
maximum
effective
bandwidth
(EABmax,
RL
<
–10
dB)
as
wide
6.32
GHz.
greatly
improved
outperformed
those
many
previously
reported
carbon-based
composite
tedious
preparation
process.
excellent
property
attributed
optimal
synergy
good
impedance
matching
satisfactory
attenuation
capability.
Besides,
retains
a
strong
broadband
ability
simulated
real
harsh
environmental
conditions
(acid
rain/alkaline
solution,
salt
spray
UV
exposure).
Hence,
believed
be
very
promising
candidate
high-efficiency
frequency
adaptability
practical
application.
Due
to
the
electromagnetic
pollution
induced
by
electronic
communication
technologies,
we
advocate
a
strategy
aimed
at
attenuating
radiation
enveloping
buildings
with
wave
(EMW)
absorbing
coatings.
The
primary
objective
of
this
investigation
is
explore
prospective
utilization
polyurea
as
an
innovative
coating
material,
dual
purpose
offering
EMW
protection
and
physical
shielding.
Based
on
understanding
excellent
performance
coatings
demand
for
materials,
preparation
new
type
FeC/C
nanofiber
absorber
its
application
in
are
examined.
Using
electrospinning
technology
carbonization,
was
successfully
prepared,
microstructure,
chemical
composition,
absorption
properties
were
thoroughly
investigated.
results
demonstrate
that
nanofibers
display
remarkable
capabilities
when
loaded
30
wt%,
achieving
minimum
reflection
loss
(RLmin)
-67.24
dB
thickness
1.82
mm
effective
bandwidth
(EAB)
5.24
GHz.
When
combined
coatings,
significantly
enhanced
while
maintaining
improved
mechanical
properties.
This
study
provides
valuable
theoretical
support
technical
reference
further
development
