Small,
Journal Year:
2022,
Volume and Issue:
19(6)
Published: Nov. 27, 2022
In
order
to
achieve
excellent
electromagnetic
wave
(EMW)
absorption
properties,
the
microstructure
design
and
component
control
of
absorber
are
critical.
this
study,
three
different
structures
made
Mo2
C/C
hollow
spheres
prepared
their
microwave
behavior
is
investigated.
The
double-shell
consisting
an
outer
thin
shell
inner
rough
thick
with
multiple
EMW
loss
mechanisms
exhibit
good
properties.
further
improve
MoC1-x
/C
crystalline
phases
molybdenum
carbide
optimize
capability
materials.
Finally,
α-phase
have
best
When
filling
20
wt.%,
minimum
reflection
at
1.8
mm
-50.55
dB
effective
bandwidth
2
5.36
GHz,
which
expected
be
a
characteristics
"thin,
light,
wide,
strong".
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: Oct. 9, 2023
Cobalt
nickel
bimetallic
oxides
(NiCo2O4)
have
received
numerous
attentions
in
terms
of
their
controllable
morphology,
high
temperature,
corrosion
resistance
and
strong
electromagnetic
wave
(EMW)
absorption
capability.
However,
broadening
the
bandwidth
is
still
a
huge
challenge
for
NiCo2O4-based
absorbers.
Herein,
unique
NiCo2O4@C
core-shell
microcubes
with
hollow
structures
were
fabricated
via
facile
sacrificial
template
strategy.
The
concentration
oxygen
vacancies
morphologies
three-dimensional
(3D)
cubic
framework
effectively
optimized
by
adjusting
calcination
temperature.
specially
designed
3D
structure
facilitated
multiple
reflections
incident
waves
provided
rich
interfaces
between
components,
generating
significant
interfacial
polarization
losses.
Dipole
polarizations
induced
could
further
enhance
attenuation
ability
EM
waves.
exhibit
superior
EMW
capability
minimum
RL
(RLmin)
-84.45
dB
at
8.4
GHz
thickness
3.0
mm.
Moreover,
ultrabroad
effective
(EAB)
as
large
12.48
(5.52-18
GHz)
obtained.
This
work
believed
to
illuminate
path
synthesis
high-performance
cobalt
absorbers
excellent
capability,
especially
bandwidth.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: Aug. 25, 2023
The
development
of
wearable
multifunctional
electromagnetic
protective
fabrics
with
multifunctional,
low
cost,
and
high
efficiency
remains
a
challenge.
Here,
inspired
by
the
unique
flower
branch
shape
"Thunberg's
meadowsweet"
in
nature,
nanofibrous
composite
membrane
hierarchical
structure
was
constructed.
Integrating
sophisticated
0D@2D@1D
structures
multiple
heterointerfaces
can
fully
unleash
application
potential
membrane.
targeted
induction
method
used
to
precisely
regulate
formation
site
morphology
metal-organic
framework
precursor,
intelligently
integrate
heterostructures
enhance
dielectric
polarization,
which
improves
impedance
matching
loss
mechanisms
wave
absorbing
materials.
Due
synergistic
enhancement
electrospinning-derived
carbon
nanofiber
"stems",
MOF-derived
nanosheet
"petals"
transition
metal
selenide
nano-particle
"stamens",
CoxSey/NiSe@CNSs@CNFs
(CNCC)
obtains
minimum
reflection
value
(RLmin)
-68.40
dB
at
2.6
mm
maximum
effective
absorption
bandwidth
(EAB)
8.88
GHz
thin
thickness
2.0
filling
amount
only
5
wt%.
In
addition,
multi-component
heterostructure
endow
fibrous
excellent
flexibility,
water
resistance,
thermal
management,
other
properties.
This
work
provides
perspectives
for
precise
design
rational
fabrics.
