Carbon Energy,
Journal Year:
2024,
Volume and Issue:
6(8)
Published: Feb. 15, 2024
Abstract
Material
composition
and
structural
design
are
important
factors
influencing
the
electromagnetic
wave
(EMW)
absorption
performance
of
materials.
To
alleviate
impedance
mismatch
attributed
to
high
dielectric
constant
Ti
3
C
2
T
x
MXene,
we
have
successfully
synthesized
core‐shell
structured
SiO
@MXene@MoS
nanospheres.
This
architecture,
comprising
as
core,
MXene
intermediate
layer,
MoS
outer
shell,
is
achieved
through
an
electrostatic
self‐assembly
method
combined
with
a
hydrothermal
process.
complex
structure
not
only
provides
variety
loss
mechanisms
that
effectively
dissipate
energy
but
also
prevents
self‐aggregation
nanosheets.
Notably,
synergistic
combination
highly
conductive
enables
suitable
composites,
ensuring
optimal
matching.
Therefore,
nanospheres
exhibit
excellent
EMW
performance,
featuring
remarkable
minimum
reflection
(RL
min
)
−52.11
dB
(2.4
mm).
It
noteworthy
these
achieve
ultra‐wide
effective
bandwidth
(EAB)
6.72
GHz.
work
novel
approach
for
designing
synthesizing
high‐performance
absorbers
characterized
by
“wide
strong
loss.”
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
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(13)
Published: Jan. 29, 2023
Abstract
Dielectric
polarization
and
magnetic
resonance
associated
with
intrinsic
constituent
extrinsic
structure
are
two
kinds
of
fundamental
attenuation
mechanisms
for
microwave
absorbers,
but
remain
extremely
challenging
in
revealing
the
composition‐morphology‐performance
correlation.
Herein,
hierarchical
MXene/metal‐organic
framework
derivatives
coherent
boundaries
units
below
critical
grain
size
constructed
to
realize
synergistic
dielectric–magnetic
enhancement
by
phase‐evolution
engineering
dynamic
resonance.
Specifically,
induced
inseparable
interfaces,
diverse
incompatible
phases,
defects/vacancies
contribute
dielectric
polarization,
while
closely
distributed
simultaneously
nanoscale
multi‐domain
coupling
long‐range
interaction.
As
results,
promise
an
exceptional
reflection
loss
−59.5
dB
effective
absorption
bandwidth
6.1
GHz.
Both
experimental
results
theoretical
calculations
indicate
that
maximize
capability
demonstrate
a
versatile
methodology
manipulating
attenuation.
More
importantly,
proposed
interaction
theories
innovatively
offer
mechanism
within
size.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Sept. 23, 2023
The
remarkable
advantages
of
heterointerface
and
defect
engineering
their
unique
electromagnetic
characteristics
inject
infinite
vitality
into
the
design
advanced
carbon-matrix
wave
absorbers.
However,
understanding
interface
dipole
effects
based
on
microscopic
macroscopic
perspectives,
rather
than
semi-empirical
rules,
can
facilitate
heterointerfaces
defects
to
adjust
impedance
matching
absorption
material,
which
is
currently
lacking.
Herein,
CuCo2S4@Expanded
Graphite
heterostructure
with
multiple
cation
are
reported,
morphology,
interfaces
component
regulated
by
varying
concentration
metal
ions.
results
show
that
3D
flower-honeycomb
crystal-crystal/amorphous
abundant
effectively
conductive
polarization
losses,
achieve
balance
carbon
materials,
improve
wave.
For
sample
CEG-6,
effective
Ku
band
RLmin
-72.28
dB
bandwidth
4.14
GHz
realized
at
1.4
mm,
while
filler
loading
only
7.0
wt.
%.
This
article
reports
establishment
potential
relationship
between
heterointerfaces,
defects,
materials.
Nano-Micro Letters,
Journal Year:
2022,
Volume and Issue:
15(1)
Published: Dec. 6, 2022
In
the
present
paper,
a
microwave
absorber
with
nanoscale
gradient
structure
was
proposed
for
enhancing
electromagnetic
absorption
performance.
The
inorganic–organic
competitive
coating
strategy
employed,
which
can
effectively
adjust
thermodynamic
and
kinetic
reactions
of
iron
ions
during
solvothermal
process.
As
result,
Fe
nanoparticles
be
gradually
decreased
from
inner
side
to
surface
across
hollow
carbon
shell.
results
reveal
that
it
offers
an
outstanding
reflection
loss
value
in
combination
broadband
wave
flexible
adjustment
ability,
is
superior
other
relative
graded
distribution
structures
satisfied
requirements
lightweight
equipment.
addition,
this
work
elucidates
intrinsic
regulation
mechanism
multiscale
hybrid
absorber.
excellent
impedance
matching
moderate
dielectric
parameters
are
exhibited
dominative
factors
promotion
performance
optimized
materials.
This
prepare
gradient-distributed
absorbing
materials
initiates
new
way
designing
fabricating
property
practical
applications.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
16(1)
Published: Dec. 4, 2023
Metal-organic
gel
(MOG)
derived
composites
are
promising
multi-functional
materials
due
to
their
alterable
composition,
identifiable
chemical
homogeneity,
tunable
shape,
and
porous
structure.
Herein,
stable
metal-organic
hydrogels
prepared
by
regulating
the
complexation
effect,
solution
polarity
curing
speed.
Meanwhile,
collagen
peptide
is
used
facilitate
fabrication
of
a
aerogel
with
excellent
physical
properties
as
well
homogeneous
dispersion
magnetic
particles
during
calcination.
Subsequently,
two
kinds
heterometallic
coupling
systems
obtained
through
application
Kirkendall
effect.
FeCo/nitrogen-doped
carbon
(NC)
demonstrates
an
ultra-strong
microwave
absorption
-
85
dB
at
ultra-low
loading
5%.
After
reducing
time
taken
atom
shifting,
FeCo/Fe
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: July 7, 2023
Highlights
Convincing
candidates
of
flexible
(stretchable/compressible)
electromagnetic
interference
shielding
nanocomposites
are
discussed
in
detail
from
the
views
fabrication,
mechanical
elasticity
and
performance.
Detailed
summary
relationship
between
deformation
materials
The
future
directions
challenges
developing
(particularly
elastic)
highlighted.
Abstract
With
extensive
use
electronic
communication
technology
integrated
circuit
systems
wearable
devices,
(EMI)
has
increased
dramatically.
shortcomings
conventional
rigid
EMI
include
high
brittleness,
poor
comfort,
unsuitability
for
conforming
deformable
applications.
Hitherto,
have
attracted
enormous
interest
due
to
their
excellent
deformability.
However,
current
present
low
stability
resilience,
relatively
performance,
limited
multifunctionality.
Herein,
advances
low-dimensional
nanomaterials-based
elastomers
outlined
a
selection
most
remarkable
examples
is
discussed.
And
corresponding
modification
strategies
deformability
performance
summarized.
Finally,
expectations
this
quickly
increasing
sector
discussed,
as
well
challenges.
Small Structures,
Journal Year:
2023,
Volume and Issue:
4(11)
Published: Aug. 8, 2023
Microwave
absorbing
materials
(MAMs)
are
that
effectively
absorb
incident
electromagnetic
(EM)
wave
energy,
reducing
reflection
and
scattering.
They
play
a
crucial
role
in
enhancing
electronic
reliability,
healthcare,
defense
security.
However,
traditional
MAMs
like
ferrites,
magnetic
metals,
polymers
possess
certain
limitations,
including
low
impedance
matching,
narrow
absorption
bandwidth,
poor
chemical
stability,
high
filling
ratio,
which
hinder
their
further
development.
To
address
the
requirements
of
lightweight,
wideband,
high‐efficiency
absorption,
precise
structural
design
has
emerged
as
captivating
research
focus.
Additionally,
comprehending
structure
–
property
relationships
between
these
unique
microstructures
EM
response
loss
mechanisms
still
poses
significant
challenges.
Herein,
comprehensive
review
is
presented
with
varied
designs
encompassing
various
scales,
providing
detailed
introduction
relationship
potential
corresponding
characteristics
mechanisms.
Moreover,
theoretical
calculation
models,
characterization,
analysis
methods
discussed.
Finally,
article
proposes
challenges
prospects
for
development
absorbers.
