Physica Scripta,
Journal Year:
2024,
Volume and Issue:
99(12), P. 125985 - 125985
Published: Nov. 8, 2024
Abstract
The
emergence
of
advanced
wave-absorbing
materials
has
led
to
a
growing
interest
in
biomass-derived
porous
carbon
due
its
abundant
availability,
low
density,
and
eco-friendly
nature.
This
study
utilized
peanut
shell
biomass
waste
produce
material
(KPS)
through
two-step
carbonation-activation
process.
We
investigated
the
influence
varying
ratios
carbonized
shells
(CPS)
potassium
hydroxide
(KOH)
activator
on
pore
structure
morphology
KPS.
comprehensive
analysis
electromagnetic
parameters
revealed
that
KPS
sample
achieved
remarkable
reflection
loss
−42.38
dB
an
effective
bandwidth
2.58
GHz
with
thickness
2.5
mm
when
quality
ratio
CPS
KOH
was
1:3
carbonation
temperature
600
°C.
Notably,
demonstrated
substantial
specific
surface
area
1037.589
m
2
g
−1
complex
architecture,
facilitating
development
conductive
network
promoting
multiple
reflections
waves.
research
highlighted
potential
efficiently
utilizing
recyclable
resources
create
microwave-absorbing
are
not
only
simple
but
also
environmentally
sustainable.
Journal of Advanced Ceramics,
Journal Year:
2024,
Volume and Issue:
13(9), P. 1461 - 1472
Published: Aug. 5, 2024
The
intensification
of
electromagnetic
(EM)
pollution
and
the
development
military
detection
technology
have
put
forward
higher
requirements
for
EM
functional
materials.
Herein,
molybdenum
diselenide@reduced
graphene
oxide
(MoSe2@rGO)
assembled
architecture
are
constructed,
where
MoSe2
nanosheets
grow
uniformly
on
rGO
sheets.
By
regulating
contributions
conduction
genes
polarization
genes,
adjustable
functions
MoSe2@rGO
hybrids
can
be
achieved.
reflection
loss
sample
reach
−68.7
dB
at
a
thickness
2.32
mm,
maximum
effective
absorption
bandwidth
5.04
GHz.
When
dominate,
exhibit
98.7%
interference
(EMI)
shielding
efficiency.
design
energy
conversion
device
results
radar
cross
section
(RCS)
simulation
demonstrate
practical
application
potential
material.
This
work
provides
inspiration
designing
multifunctional
Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: March 24, 2025
Abstract
High-temperature
stealth
is
vital
for
enhancing
the
concealment,
survivability,
and
longevity
of
critical
assets.
However,
achieving
across
multiple
infrared
bands—particularly
in
short-wave
(SWIR)
band—along
with
microwave
efficient
thermal
management
at
high
temperatures,
remains
a
significant
challenge.
Here,
we
propose
strategy
that
integrates
an
IR-selective
emitter
(Mo/Si
multilayer
films)
metasurface
(TiB
2
–Al
O
3
–TiB
)
to
enable
multi-infrared
band
stealth,
encompassing
mid-wave
(MWIR),
long-wave
(LWIR),
SWIR
bands,
(X-band)
700
°C,
simultaneous
radiative
cooling
non-atmospheric
window
(5–8
μm).
At
device
exhibits
low
emissivity
0.38/0.44/0.60
MWIR/LWIR/SWIR
reflection
loss
below
−
dB
X-band
(9.6–12
GHz),
0.82
5–8
μm
range—corresponding
power
9.57
kW
m
−2
.
Moreover,
under
input
17.3
—equivalent
aerodynamic
heating
Mach
2.2—the
demonstrates
temperature
reduction
72.4
°C
compared
conventional
low-emissivity
molybdenum
surface
temperatures.
This
work
provides
comprehensive
guidance
on
high-temperature
design,
far-reaching
implications
multispectral
information
processing
extreme
environments.
Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: Feb. 25, 2025
Abstract
Magnetic
absorbers
with
high
permeability
have
significant
advantages
in
low-frequency
and
broadband
electromagnetic
wave
(EMW)
absorption.
However,
the
insufficient
magnetic
loss
inherent
conductivity
of
existing
limit
further
expansion
EMW
absorption
bandwidth.
Herein,
spinel
(FeCoNiCrCu)
3
O
4
high-entropy
oxides
(HEO)
are
successfully
constructed
on
surface
FeCoNiCr
0.4
Cu
0.2
alloys
(HEA)
through
low-temperature
oxygen
bath
treatment.
On
one
hand,
HEO
HEA
different
magnetocrystalline
anisotropies,
which
is
conducive
to
achieving
continuous
natural
resonance
improve
loss.
other
low
can
serve
as
an
impedance
matching
layer,
magneto-electric
co-modulation.
When
thickness
5
mm,
minimum
reflection
(RL)
value
bandwidth
(RL
<
−
dB)
bi-phase
composites
(BPHEC)
reach
12.8
dB
633
MHz,
respectively.
The
RCS
reduction
multilayer
sample
gradient
characteristic
18.34
m
2
.
In
addition,
BPHEC
also
exhibits
temperature-stable
performance,
Curie
temperature,
oxidation
resistance.
maintains
between
593
691
MHz
from
50
150
°C.
This
work
offers
a
new
tunable
strategy
toward
modulating
genes
for
ultra-broadband
megahertz
