Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 5, 2025
Cellulose
aerogels,
as
a
novel
class
of
carbon-based
materials,
exhibit
immense
potential
in
the
field
microwave
absorption
(MWA)
due
to
their
biocompatibility,
low
density,
unique
porous
structure,
and
tunable
architecture.
However,
development
multi-dimensional
components
with
specialized
heterogeneous
structures,
which
are
based
on
cellulose
remains
significant
challenge.
This
0D/1D/3D
structural
configuration
facilitates
electromagnetic
properties
favorable
impedance
matching.
The
Schottky
contact
at
ZnO/Ni
interface,
particular,
induces
strong
interfacial
polarization,
design
results
multiple
heterointerfaces.
Density
functional
theory
(DFT)
calculations
reveal
that
barrier
causes
band
bending,
facilitating
directed
migration
electrons
interface
formation
an
internal
electric
field,
thus
significantly
accelerating
multipolar
relaxation
process.
As
anticipated,
CCMC/ZnO@Ni
aerogel
exhibits
minimum
reflection
loss
(RLmin)
value
-64.0
dB
13.9
GHz
thickness
2.0
mm,
its
effective
bandwidth
(EAB)
reaches
4.9
GHz.
work
gives
valuable
guidance
inspiration
for
materials
composed
dimensional
gradient
holds
great
application
wave
(EMW)
attenuation.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(19)
Published: Jan. 9, 2024
Abstract
The
trends
of
miniaturization,
lightweight,
and
high
integration
in
electronics
have
brought
serious
issues
heat
dissipation
electromagnetic
compatibility
also
limited
the
simultaneous
use
thermally
conductive
microwave
absorption
materials.
Therefore,
it
is
imperative
to
design
materials
that
possess
those
dual
functions.
In
this
work,
one‐pot
method
used
anchor
zeolitic
imidazolate
framework
ZIF‐67
coated
with
polydopamine
(PDA)
on
boron
nitride
(BN)
obtain
BN@ZIF‐67@PDA.
pyrolysis
product
BN@Co‐C@C
as
heterostructured
conductive/microwave
fillers
blended
polyethylene
terephthalate
(PET)
prepare
BN@Co‐C@C/PET
composites.
When
mass
ratio
BN
ZIF‐67@PDA
7.5:1
fraction
7.5
@Co‐C@C
45
wt%,
@Co‐C@C/PET
composites
exhibit
excellent
thermal
conductivities
performances.
conductivity
coefficient
5.37
W
m
−1
K
,
which
35.8
times
higher
than
PET
(0.15
),
wt%
(BN
/Co‐C@C)/PET
(4.03
)
prepared
by
directly
mixing.
minimum
reflection
loss
are
−63.1
dB
at
4.72
GHz,
corresponding
effective
bandwidth
1.28
GHz
(4.08–5.36
GHz),
achieving
performance
C
band.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: June 17, 2024
Abstract
Considering
the
serious
electromagnetic
wave
(EMW)
pollution
problems
and
complex
application
condition,
there
is
a
pressing
need
to
amalgamate
multiple
functionalities
within
single
substance.
However,
effective
integration
of
diverse
functions
into
designed
EMW
absorption
materials
still
faces
huge
challenges.
Herein,
reduced
graphene
oxide/carbon
foams
(RGO/CFs)
with
two-dimensional/three-dimensional
(2D/3D)
van
der
Waals
(vdWs)
heterostructures
were
meticulously
engineered
synthesized
utilizing
an
efficient
methodology
involving
freeze-drying,
immersing
absorption,
secondary
followed
by
carbonization
treatment.
Thanks
their
excellent
linkage
effect
amplified
dielectric
loss
optimized
impedance
matching,
2D/3D
RGO/CFs
vdWs
demonstrated
commendable
performances,
achieving
broad
bandwidth
6.2
GHz
reflection
−
50.58
dB
low
matching
thicknesses.
Furthermore,
obtained
also
displayed
significant
radar
stealth
properties,
good
corrosion
resistance
performances
as
well
outstanding
thermal
insulation
capabilities,
displaying
great
potential
in
variable
environments.
Accordingly,
this
work
not
only
straightforward
method
for
fabricating
heterostructures,
but
outlined
powerful
mixed-dimensional
assembly
strategy
engineering
multifunctional
protection,
aerospace
other
conditions.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
16(1)
Published: Nov. 6, 2023
Electromagnetic
wave
(EMW)
absorbing
materials
have
an
irreplaceable
position
in
the
field
of
military
stealth
as
well
electromagnetic
pollution
control.
And
order
to
cope
with
complex
environment,
design
multifunctional
and
multiband
high
efficiency
EMW
absorbers
remains
a
tremendous
challenge.
In
this
work,
we
designed
three-dimensional
porous
structure
via
salt
melt
synthesis
strategy
optimize
impedance
matching
absorber.
Also,
through
interfacial
engineering,
molybdenum
carbide
transition
layer
was
introduced
between
selenide
nanoparticles
carbon
matrix
improve
absorption
behavior
The
analysis
indicates
that
number
components
heterogeneous
interfaces
significant
impact
on
performance
absorber
due
mechanisms
such
polarization
conduction
loss
by
engineering.
Wherein,
prepared
MoSe
Small,
Journal Year:
2023,
Volume and Issue:
20(8)
Published: Oct. 10, 2023
Abstract
Layered
double
hydroxides
(LDHs)
with
unique
layered
structure
and
atomic
composition
are
limited
in
the
field
of
electromagnetic
wave
absorption
(EMA)
due
to
their
poor
electrical
conductivity
lack
dielectric
properties.
In
this
study,
EMA
performance
anticorrosion
hollow
derived
LDH
composites
improved
by
temperature
control
design
using
ZIF‐8
as
a
sacrifice
template.
Diverse
regulation
modes
result
different
mechanisms
for
EMA.
process,
chemical
reactions
tune
products
construct
refined
optimize
LDHs
loss.
Additionally,
phase
interfaces
generated
components
impedance
matching
enhance
interfacial
polarization.
The
results
show
that
prepared
NCZ
(Ni3ZnC0.7/Co3ZnC@C)
has
minimum
reflection
loss
(RL
min
)
‐58.92
dB
thickness
2.4
mm
maximum
effective
bandwidth
(EAB
max
7.36
GHz
mm.
Finally,
its
special
composition,
sample
exhibits
excellent
This
work
offers
essential
knowledge
designing
engineering
materials
from
metal
organic
framework
(MOF)
cutting‐edge
nanostructures.
