Nano-Micro Letters,
Год журнала:
2023,
Номер
16(1)
Опубликована: Ноя. 17, 2023
Abstract
Carbon-based
aerogels
derived
from
biomass
chitosan
are
encountering
a
flourishing
moment
in
electromagnetic
protection
on
account
of
lightweight,
controllable
fabrication
and
versatility.
Nevertheless,
developing
facile
construction
method
component
design
with
carbon-based
for
high-efficiency
wave
absorption
(EWA)
materials
broad
effective
bandwidth
(EAB)
strong
yet
hits
some
snags.
Herein,
the
nitrogen-doped
magnetic-dielectric-carbon
aerogel
was
obtained
via
ice
template
followed
by
carbonization
treatment,
homogeneous
abundant
nickel
(Ni)
manganese
oxide
(MnO)
particles
situ
grew
carbon
aerogels.
Thanks
to
optimization
impedance
matching
dielectric/magnetic
components
aerogels,
(Ni/MnO-CA)
suggests
praiseworthy
EWA
performance,
an
ultra-wide
EAB
7.36
GHz
minimum
reflection
loss
(RL
min
)
−
64.09
dB,
while
achieving
specific
253.32
dB
mm
−1
.
Furthermore,
reveals
excellent
radar
stealth,
infrared
thermal
management
capabilities.
Hence,
high-performance,
easy
fabricated
multifunctional
nickel/manganese
oxide/carbon
have
application
aspects
protection,
electronic
devices
aerospace.
Advanced Materials,
Год журнала:
2021,
Номер
34(4)
Опубликована: Окт. 4, 2021
Electromagnetic
(EM)
absorbers
play
an
increasingly
essential
role
in
the
electronic
information
age,
even
toward
coming
"intelligent
era".
The
remarkable
merits
of
heterointerface
engineering
and
its
peculiar
EM
characteristics
inject
a
fresh
infinite
vitality
for
designing
high-efficiency
stimuli-responsive
absorbers.
However,
there
still
exist
huge
challenges
understanding
reinforcing
these
interface
effects
from
micro
macro
perspectives.
Herein,
response
mechanisms
interfacial
are
dissected
depth,
with
focus
on
advanced
characterization
as
well
theoretical
techniques.
Then,
representative
optimization
strategies
systematically
discussed
emphasis
component
selection
structural
design.
More
importantly,
most
cutting-edge
smart
functional
devices
based
reported.
Finally,
current
concrete
suggestions
proposed,
future
perspectives
this
promising
field
also
predicted.
Nano-Micro Letters,
Год журнала:
2022,
Номер
14(1)
Опубликована: Авг. 20, 2022
Developing
ultrabroad
radar-infrared
compatible
stealth
materials
has
turned
into
a
research
hotspot,
which
is
still
problem
to
be
solved.
Herein,
the
copper
sulfide
wrapped
by
reduced
graphene
oxide
obtain
three-dimensional
(3D)
porous
network
composite
aerogels
(CuS@rGO)
were
synthesized
via
thermal
reduction
ways
(hydrothermal,
ascorbic
acid
reduction)
and
freeze-drying
strategy.
It
was
discovered
that
phase
components
(rGO
CuS
phases)
micro/nano
structure
(microporous
nanosheet)
well-modified
modulating
additive
amounts
of
changing
ways,
resulted
in
variation
pore
structure,
defects,
complex
permittivity,
microwave
absorption,
radar
cross
section
(RCS)
value
infrared
(IR)
emissivity.
Notably,
obtained
CuS@rGO
with
single
dielectric
loss
type
can
achieve
an
bandwidth
8.44
GHz
at
2.8
mm
low
filler
content
6
wt%
hydrothermal
method.
Besides,
aerogel
realizes
minimum
reflection
(RLmin)
-
60.3
dB
lower
2
wt%.
The
RCS
reach
53.3
m2,
effectively
reduces
probability
target
being
detected
detector.
Furthermore,
laminated
architecture
multicomponent
endowed
insulation
IR
versatility.
Thus,
this
work
offers
facile
method
design
develop
rGO-based
absorbers
radar-IR
stealth.
Nano-Micro Letters,
Год журнала:
2022,
Номер
14(1)
Опубликована: Фев. 21, 2022
The
development
of
multifunctional
and
efficient
electromagnetic
wave
absorbing
materials
is
a
challenging
research
hotspot.
Here,
the
magnetized
Ni
flower/MXene
hybrids
are
successfully
assembled
on
surface
melamine
foam
(MF)
through
electrostatic
self-assembly
dip-coating
adsorption
process,
realizing
integration
microwave
absorption,
infrared
stealth,
flame
retardant.
Remarkably,
Ni/MXene-MF
achieves
minimum
reflection
loss
(RLmin)
-
62.7
dB
with
corresponding
effective
absorption
bandwidth
(EAB)
6.24
GHz
at
2
mm
an
EAB
6.88
1.8
mm.
Strong
attributed
to
three-dimensional
magnetic/conductive
networks,
which
provided
excellent
impedance
matching,
dielectric
loss,
magnetic
interface
polarization,
multiple
attenuations.
In
addition,
endows
low
density,
heat
insulation,
flame-retardant
functions.
This
work
new
strategy
for
design
materials.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(33)
Опубликована: Июнь 8, 2022
Abstract
Severe
lower‐frequency
(2–8
GHz)
microwave
pollution
caused
by
the
rapid
development
of
5th
generation
(5G)
communication
posts
significance
on
cutting‐edge
absorbers.
However,
intensely
coupled
wave‐impedance
and
dissipating
ability
dramatically
hinder
their
performance
in
exact
range.
The
rationally
designed
heterostructure
hard/soft
ferrite
composite
provides
an
efficient
solution
to
address
issue.
In
this
context,
core‐shell
structured
BaFe
(12‐x)
Co
x
O
19
@Fe
3
4
with
abundant
heterointerface
is
created
using
facile
spray‐drying
subsequent
solvothermal
approach,
where
hard
magnetic
serves
as
core
soft
Fe
shell,
respectively.
unique
integration
contributes
sufficient
exchange
coupling
interaction
for
strong
loss
beyond
Snoek's
limitation,
which
considerably
boosts
a
absorption.
Accordingly,
minimum
reflection
(RL
min
)
typical
11.6
0.4
microcomposite
reaches
−
48.9
dB
at
thickness
3.5
mm,
its
bandwidth
<
10
can
cover
almost
all
S
C
bands
(2.6–8
GHz).
Generally,
easy
controllable
pathway
conveyed
work
encourage
improved
well
decouple
composites,
widens
road
advanced
Nano-Micro Letters,
Год журнала:
2023,
Номер
15(1)
Опубликована: Авг. 9, 2023
Two-dimensional
transition
metal
carbides
and
nitrides
(MXene)
have
emerged
as
promising
candidates
for
microwave
absorption
(MA)
materials.
However,
they
also
some
drawbacks,
such
poor
impedance
matching,
high
self-stacking
tendency,
density.
To
tackle
these
challenges,
MXene
nanosheets
were
incorporated
into
polyacrylonitrile
(PAN)
nanofibers
subsequently
assembled
a
three-dimensional
(3D)
network
structure
through
PAN
carbonization,
yielding
MXene/C
aerogels.
The
3D
effectively
extends
the
path
of
microcurrent
transmission,
leading
to
enhanced
conductive
loss
electromagnetic
(EM)
waves.
Moreover,
aerogel's
rich
pore
significantly
improves
matching
while
reducing
density
MXene-based
absorbers.
EM
parameter
analysis
shows
that
aerogels
exhibit
minimum
reflection
(RLmin)
value
-
53.02
dB
(f
=
4.44
GHz,
t
3.8
mm),
an
effective
bandwidth
(EAB)
5.3
GHz
(t
2.4
mm,
7.44-12.72
GHz).
Radar
cross-sectional
(RCS)
simulations
employed
assess
radar
stealth
effect
aerogels,
revealing
maximum
RCS
reduction
perfect
electric
conductor
covered
by
aerogel
reaches
12.02
m2.
In
addition
MA
performance,
demonstrates
good
thermal
insulation
5-mm-thick
can
generate
temperature
gradient
over
30
°C
at
82
°C.
This
study
provides
feasible
design
approach
creating
lightweight,
efficient,
multifunctional
The
electromagnetic
(EM)
devices
have
been
widely
used
in
communication,
electrical
engineering,
and
medical
care.
However,
EM
device
is
a
double‐edged
sword
for
its
convenience
followed
by
signal
pollution
radiation.
Electromagnetic
interference
(EMI)
combat
has
brought
lots
of
attention
to
researchers
this
field.
Researchers
made
great
efforts
developing
wave
absorbing
shielding
(EMAS)
materials
reduce
power
density
solve
the
above
problem.
majority
reported
EMAS
are
powders
coatings,
which
possess
merely
property.
Modern
practical
application
abundant
multiple
scenes,
including
high
temperature,
intense
light,
water
flow,
etc.
Under
circumstances,
should
be
functionalized
with
outstanding
tunable
absorption
bands.
Based
on
field
theory
physics,
multiexternal
fields‐responsive
an
effective
method
deal
urgently
unsolved
Thus,
herein,
different
external
field‐responsive
materials,
space–time,
electrical,
wind,
density,
flow
fields,
focused
on.
Various
action
mechanisms,
synthesis
methods,
macrostructures
summarized
detail.
Meanwhile,
trends
novel
also
discussed
order.
Finally,
challenges
designing
new
type
mentioned.
