Small,
Journal Year:
2024,
Volume and Issue:
20(47)
Published: Aug. 11, 2024
Abstract
The
excellent
performance
of
electromagnetic
wave
absorbers
primarily
depends
on
the
coordination
among
components
and
rational
design
structure.
In
this
study,
a
series
porous
fibers
with
carbon
nanotubes
uniformly
distributed
in
shape
pine
leaves
are
prepared
through
electrospinning
technique,
one‐pot
hydrothermal
synthesis,
high‐temperature
catalysis
method.
impedance
matching
nanofibers
structure
is
optimized
by
incorporating
melamine
into
spinning
solution,
as
it
undergoes
gas
decomposition
during
calcination.
Moreover,
electronic
can
be
modulated
controlling
NH
4
F
content
synthesis
process.
Ultimately,
Ni/Co/CrN/CNTs‐CF
specimen
(P3C
NiCrN12)
exhibited
superior
performance,
while
achieving
minimum
reflection
loss
(RL
min
)
−56.18
dB
at
thickness
2.2
mm
maximum
absorption
bandwidth
(EAB
max
5.76
GHz
2.1
mm.
This
study
presents
an
innovative
approach
to
fabricating
lightweight,
thin
materials
exceptional
properties
wide
optimizing
three
key
factors
influencing
performance.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 4, 2024
Abstract
Electromagnetic
interference
(EMI)
shielding
materials
with
low
electromagnetic
(EM)
waves
reflection
characteristics
are
ideal
for
blocking
EM
radiation
and
pollution.
Materials
reflectivity
must
be
constructed
using
excellent
absorption
properties.
However,
simultaneously
possessing
both
EMI
performance
remain
scarce,
consequently,
multilayer
structures
need
to
developed.
Poly(p‐phenylene–2,6–benzobisoxazole)
nanofibers
(PNF)
prepared
by
deprotonation.
PNF
combined
MXene
heterostructure
MXene@Ni
in‐situ
growth;
MXene@Ni/PNF
acts
as
an
layer
while
MXene/PNF
reflective
layer.
Finally,
(MXene@Ni/PNF)–(MXene/PNF)
aerogels
layer‐by‐layer
freeze‐drying
based
on
the
layered
modular
design
concept.
Experimental
characterizations
revealed
that
enable
efficient
absorption‐reflection‐reabsorption
of
waves,
effectively
eliminating
EMI.
When
mass
ratio
Ni
in
is
1:6
fraction
80
wt.%,
exhibit
(71
dB)
a
very
coefficient
(R
=
0.10).
Finite
element
simulations
verified
developed
asymmetric
structural
achieve
high
characteristics.
In
addition,
display
infrared
camouflage
ability.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 7, 2024
Abstract
Construction
of
built‐in
electric
field
(BIEF)
in
nanohybrids
has
been
demonstrated
as
an
efficacious
strategy
to
boost
the
dielectric
loss
by
facilitating
oriented
transfer
and
transition
charges,
thus
optimizing
electromagnetic
wave
absorption
property.
However,
specific
influence
BIEF
on
interface
polarization
needs
explore
thoroughly
strength
should
be
further
augmented.
Herein,
several
systems
incorporated
Mott–Schottky
heterojunctions
hollow
structures
are
designed
constructed,
where
bimetallic
zeolitic
imidazolate
framework
employed
derive
Cu‐ZnO
heterojunctions,
hierarchical
enriched
introducing
structure
reduced
graphene
oxide.
The
well‐established
“double”
verified
theoretical
calculation
engineering
can
regulate
conductivity,
enhance
relaxation
effectively.
Especially,
there
always
coexisted
both
enhanced
charge
separation
reversed
distribution
this
BIEF,
boosting
polarization.
Attributing
synergy
well‐matched
impedance
amplified
loss,
obtained
hybrids
exhibited
superior
(reflection
−46.29
dB
ultra‐wide
effective
bandwidth
7.6
GHz
at
only
1.6
mm).
This
work
proves
innovative
model
for
dissecting
mechanisms
pioneers
a
novel
advanced
absorbers
through
enhancing
BIEF.
