Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: Feb. 6, 2025
Abstract
The
construction
of
carbon
nanocoil
(CNC)-based
chiral-dielectric-magnetic
trinity
composites
is
considered
as
a
promising
approach
to
achieve
excellent
low-frequency
microwave
absorption.
However,
it
still
challenging
further
enhance
the
low
frequency
absorption
and
elucidate
related
loss
mechanisms.
Herein,
chiral
CNCs
are
first
synthesized
on
three-dimensional
(3D)
foam
then
combined
with
FeNi/NiFe
2
O
4
nanoparticles
form
novel
foam.
3D
porous
CNC-carbon
network
provides
impedance
matching
strong
conduction
loss.
formation
FeNi-carbon
interfaces
induces
interfacial
polarization
loss,
which
confirmed
by
density
functional
theory
calculations.
Further
permeability
analysis
micromagnetic
simulation
indicate
that
nanoscale
magnetic
heterostructures
pinning
coupling
effects,
anisotropy
capability.
Owing
synergistic
effect
between
dielectricity,
chirality,
magnetism,
composite
exhibits
performance
an
ultrabroad
effective
bandwidth
(EAB)
14
GHz
minimum
reflection
less
than
−
50
dB.
More
importantly,
C-band
EAB
extended
GHz,
achieving
full
coverage.
This
study
guidelines
for
microstructure
design
broadband
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(3), P. 3978 - 3990
Published: Jan. 9, 2024
Simultaneously
realizing
high
electromagnetic
interference
(EMI)
shielding
and
superhydrophobic
properties
of
materials
to
ensure
long-term
stability
in
harsh
environments
is
a
very
challenging
task.
In
this
work,
an
efficient
EMI
composite
with
gradient
conductivity
porous
structure
was
prepared
by
chemical
plating,
situ
polymerization,
spraying
processes.
Benefiting
from
the
structural
characteristics
multilayers
rational
distribution
two-component
fillers
composite,
as
well
synergistic
effect
various
loss
mechanisms,
perfect
unification
effectiveness
62
dB
absorption
coefficient
(A)
0.77
achieved.
Meanwhile,
thin
layer
further
enhanced
impedance
matching
constructed
on
surface
using
double-sized
mixed
particles
Fe3O4
graphite
(GP)
conjunction
process.
The
rough
microstructure
bestows
superhydrophobicity,
even
after
immersion
acidic
alkali
solutions
or
repetitive
bending,
water
contact
angle
still
remains
at
level.
Additionally,
sprayed
also
endow
outstanding
photothermal
conversion
that
enhance
ability
adapt
environmental
changes,
significantly
raising
practical
application
value.
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(51), P. 59681 - 59692
Published: Dec. 12, 2023
In
the
field
of
electromagnetic
wave
(EMW)
absorption,
carbon
matrix
materials
based
on
metal-organic
frameworks
(MOFs)
have
drawn
more
interest
as
a
result
their
outstanding
advantages,
such
porous
structure,
lightweight,
controlled
morphology,
etc.
However,
how
to
broaden
effective
absorption
bandwidth
[EAB;
reflection
loss
(RL)
≤
-10
dB]
is
still
challenge.
this
paper,
large
microsphere
structures
Co/C
composite
composed
small
particle
clusters
were
successfully
prepared
by
solvothermal
method
and
annealing
treatment.
At
filling
ratio
40
wt
%,
shows
attractive
microwave
(MA)
performance
after
being
annealed
at
600
°C
in
an
atmosphere
argon.
With
EAB
6.32
GHz
(9.92-16.24
GHz)
thickness
just
2.57
mm,
minimum
RL
can
be
attained
-54.55
dB.
Most
importantly,
attain
7.12
(10.88-18.0
when
2.38
which
larger
than
that
majority
MOF-derived
composites.
The
superior
MA
strongly
related
excellent
impedance
matching
higher
attenuation
constant.
This
study
provides
simple
strategy
for
synthesizing
with
wide
EAB.
