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.
Nano-Micro Letters,
Год журнала:
2021,
Номер
14(1)
Опубликована: Дек. 11, 2021
Atomically
dispersed
metals
on
N-doped
carbon
supports
(M-NxCs)
have
great
potential
applications
in
various
fields.
However,
a
precise
understanding
of
the
definitive
relationship
between
configuration
metal
single
atoms
and
dielectric
loss
properties
M-NxCs
at
atomic-level
is
still
lacking.
Herein,
we
report
general
approach
to
synthesize
series
three-dimensional
(3D)
honeycomb-like
M-NxC
(M
=
Mn,
Fe,
Co,
Cu,
or
Ni)
containing
atoms.
Experimental
results
indicate
that
3D
exhibit
greatly
enhanced
compared
with
NC
matrix.
Theoretical
calculations
demonstrate
density
states
d
orbitals
near
Fermi
level
significantly
increased
additional
electrical
dipoles
are
induced
due
destruction
symmetry
local
microstructure,
which
enhances
conductive
dipolar
polarization
M-NxCs,
respectively.
Consequently,
these
excellent
electromagnetic
wave
absorption
properties,
outperforming
most
commonly
reported
absorbers.
This
study
systematically
explains
mechanism
atomic
for
first
time
significance
rational
design
high-efficiency
absorbing
materials
Green Chemistry,
Год журнала:
2022,
Номер
24(13), С. 5280 - 5290
Опубликована: Янв. 1, 2022
In
the
face
of
increasingly
severe
electromagnetic
wave
pollution,
research
biomass-based
carbon
materials
due
to
advantages
being
green,
renewable,
environment-friendly,
porous
and
light
has
become
one
most
attractive
topics.
Nano-Micro Letters,
Год журнала:
2022,
Номер
14(1)
Опубликована: Июль 5, 2022
Electromagnetic
cooperative
strategy
has
been
presented
as
a
mainstream
approach
that
can
effectively
optimize
the
matching
thickness
of
dielectric
loss
dominant
system.
However,
it
is
still
challenging
for
dielectric-magnetic
coexisting-type
absorber
to
develop
electromagnetic
wave
(EMW)
performance
with
ultra-low
(≤
1
mm).
Breaking
limitation
traditional
response
at
microscopic/mesoscopic
scale,
ficus
microcarpa-like
magnetic
aerogel
macroscopical
effect
was
fabricated
through
highly
oriented
self-assembly
engineering.
The
Ni
chains
unique
macroscopic
morphology
(~
cm
in
length)
were
achieved
via
special
field-induced
growth.
Strong
coupling
observed
confirmed
by
micromagnetic
simulation.
deductive
calculation
validates
maintaining
high
value
parameters
frequencies
prerequisites
ultrathin
absorber.
networks
uninterrupted
and
dual
pathways
spread
entire
skeleton,
resulting
impressive
permittivity
even
frequencies.
Consequently,
exhibits
remarkable
EMW
an
mm.
Thus,
based
on
modulation
parameters,
this
work
proposed
ordered
structure
useful
suitable
achieving
absorbers.
