ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(28), P. 36962 - 36972
Published: July 3, 2024
Aerogel-based
composites,
renowned
for
their
three-dimensional
(3D)
network
architecture,
are
gaining
increasing
attention
as
lightweight
electromagnetic
(EM)
wave
absorbers.
However,
attaining
high
reflection
loss,
broad
effective
absorption
bandwidth
(EAB),
and
ultrathin
thickness
concurrently
presents
a
formidable
challenge,
owing
to
the
stringent
demands
precise
structural
regulation
incorporation
of
magnetic/dielectric
multicomponents
with
synergistic
loss
mechanisms
within
3D
networks.
In
this
study,
we
successfully
synthesized
hierarchical
porous
Fe
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: July 5, 2024
Abstract
The
combination
between
macroscopic
structure
designs
and
microscopic
material
offers
tremendous
possibilities
for
the
development
of
advanced
electromagnetic
wave
(EMW)
absorbers.
Herein,
we
propose
a
metamaterial
design
to
address
persistent
challenges
in
this
field,
including
narrow
bandwidth,
low–frequency
bottlenecks,
and,
particularly,
urgent
issue
robustness
(i.e.,
oblique,
polarized
incidence).
Our
absorber
features
semiconductive
metal-organic
framework/iron
2D/2D
assembly
(CuHT–FCIP)
with
abundant
crystal/crystal
heterojunctions
strong
magneto-electric
coupling
networks.
This
achieves
remarkable
EMW
absorption
across
broad
range
(2
40
GHz)
at
thickness
just
9.3
mm.
Notably,
it
maintains
stable
performance
against
oblique
incidence
(within
75°)
polarizations
(both
transverse
electric
magnetic).
Furthermore,
demonstrates
high
specific
compressive
strength
(201.01
MPa·cm
3
·g
−1
)
low
density
(0.89
g·cm
−3
).
advancement
holds
promise
developing
robust
absorbers
superior
performance.
Cell Reports Physical Science,
Journal Year:
2024,
Volume and Issue:
5(7), P. 102097 - 102097
Published: July 1, 2024
The
rapid
development
of
intelligent
devices
imposes
new
demands
on
electromagnetic
wave
(EMW)-absorbing
materials,
especially
concerning
wide-spectrum
absorption,
frequency
band
manipulation,
and
multifunctional
integration.
However,
conventional
investigations
EMW-absorbing
materials
face
several
challenges
that
collectively
limit
the
effectiveness
existing
amid
growing
demands,
including
ambiguous
(EM)
loss
mechanisms,
impedance
mismatches,
deficiencies
in
integrated
design.
This
review
elucidates
EM
delineates
key
bridge
mechanisms
linking
microscopic
macroscopic
factors,
proposes
dielectric
polarization
models
to
clarify
mechanisms.
Additionally,
it
delves
into
unique
advantages
core-shell
structures
porous
optimization.
Finally,
introduces
fabrication
approaches
integrate
detailing
design
strategies
exploring
potential
applications.
By
consolidating
these
cutting-edge
achievements,
this
aims
guide
scientific
advancement
materials.
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 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.
