Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Feb. 13, 2024
Abstract
The
demand
for
low‐frequency
microwave
absorption
materials
is
becoming
more
and
urgent.
Novel
shape
anisotropy
chain‐like
CoNi
fabricated
using
polyvinylpyrrolidone
as
a
shape‐directing
agent
via
solvothermal
method,
which
then
mixed
with
polydimethylsiloxane
(PDMS)
to
prepare
corresponding
multifunctional
CoNi/PDMS
composite
films.
Shape
strong
magnetic
coupling
effect
of
enhance
natural
resonance
loss
capability.
minimum
reflection
(RL
min
)
−50.5
dB
effective
bandwidth
(EAB)
1.04
GHz
(2.64–3.68
GHz)
at
3.9
mm
CoNi.
18
vol%
films
present
optimal
performance
RL
−56.7
EAB
(2.96–4.00
4.1
mm,
far
superior
spherical
−9.5
dB.
Meantime,
the
in‐plane
inter‐plane
thermal
conductivity
coefficients
are
2.05
0.61
W
m
−1
K
,
about
1.5
times
higher
than
(1.36
0.42
),
also
220%
190%
pure
PDMS
(0.64
0.21
).
This
can
broaden
applications
in
5G
communications
flexible
electronics.
Advanced Science,
Journal Year:
2023,
Volume and Issue:
10(32)
Published: Sept. 21, 2023
Abstract
Stealth
technology
is
used
to
enhance
the
survival
of
military
equipment
in
field
surveillance,
as
it
utilizes
a
combination
techniques
render
itself
undetectable
by
enemy
radar
systems.
Radar
absorbing
materials
(RAMs)
are
specialized
reduce
reflection
(or
absorption)
signals
provide
stealth
capability,
which
core
component
passive
countermeasures
applications.
The
properties
RAMs
can
be
optimized
adjusting
their
composition,
microstructure,
and
surface
geometry.
Carbon‐based
present
promising
approach
for
fabrication
ultrathin,
versatile,
high‐performance
due
large
specific
area,
lightweight,
excellent
dielectric
properties,
high
electrical
conductivity,
stability
under
harsh
conditions.
This
review
begins
with
brief
history
an
introduction
electromagnetic
waves,
systems,
materials.
followed
discussion
recent
research
progress
carbon‐based
RAMs,
including
carbon
blacks,
fibers,
nanotubes,
graphite,
graphene,
MXene,
along
in‐depth
examination
principles
strategies
on
attenuation
characteristics.
Hope
this
will
offer
fresh
perspectives
design
thereby
fostering
deeper
fundamental
understanding
promoting
practical
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:
2024,
Volume and Issue:
16(1)
Published: April 15, 2024
With
the
diversified
development
of
big
data,
detection
and
precision
guidance
technologies,
electromagnetic
(EM)
functional
materials
devices
serving
multiple
spectrums
have
become
a
hot
topic.
Exploring
multispectral
response
is
challenging
meaningful
scientific
question.
In
this
study,
MXene/TiO
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.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: July 2, 2024
The
impedance
matching
of
absorbers
is
a
vital
factor
affecting
their
microwave
absorption
(MA)
properties.
In
this
work,
we
controllably
synthesized
Material
Institute
Lavoisier
88C
(MIL-88C)
with
varying
aspect
ratios
(AR)
as
precursor
by
regulating
oil
bath
conditions,
followed
one-step
thermal
decomposition
to
obtain
carbon-coated
iron-based
composites.
Modifying
the
MIL-88C
(Fe)
preparation
such
molar
ratio
between
metal
ions
and
organic
ligands
(M/O),
temperature,
time,
influenced
phases,
graphitization
degree,
AR
derivatives,
enabling
low
filler
loading,
achieving
well-matched
impedance,
ensuring
outstanding
MA
MOF-derivatives
2
(MD
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(52)
Published: Aug. 27, 2024
Abstract
2D
materials
and
their
composites
with
electromagnetic
properties
are
becoming
increasingly
popular.
Obtaining
insight
into
the
nature
of
(EM)
response
manipulation
is
imperative
to
guide
scientific
research
technological
exploitation
at
such
a
critical
time.
From
this
perspective,
dielectric
genes
material
hybrids
have
been
highlighted
based
on
recent
literature.
This
endows
an
unlimited
possibility
manipulating
EM
response,
even
elevated
temperatures.
The
definitions
criteria
toward
systematically
clarified
summarized.
gene
categories
successfully
discriminated,
including
conduction
networks,
intrinsic
defects,
impurity
interfaces
in
composite,
temperature
evolution
revealed
detail.
More
importantly,
tuning
strategies
for
microwave
absorption,
shielding
effectiveness,
expanded
functions
thoroughly
discussed.
Finally,
significant
predictions
provided
multispectral
functions,
future
applications
multifunctional
exploration
anticipated.
Dielectric
will
open
unexpected
horizon
advanced
functional
coming
5G/6G
age,
providing
boost
promoting
environmental
protection,
devices,
next‐generation
smart
devices.
