Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
16(1)
Published: Nov. 17, 2023
Abstract
Pre-polymerized
vinyl
trimethoxy
silane
(PVTMS)@MWCNT
nano-aerogel
system
was
constructed
via
radical
polymerization,
sol–gel
transition
and
supercritical
CO
2
drying.
The
fabricated
organic–inorganic
hybrid
PVTMS@MWCNT
aerogel
structure
shows
nano-pore
size
(30–40
nm),
high
specific
surface
area
(559
m
g
−1
),
void
fraction
(91.7%)
enhanced
mechanical
property:
(1)
the
is
beneficial
for
efficiently
blocking
thermal
conduction
convection
Knudsen
effect
(beneficial
infrared
(IR)
stealth);
(2)
heterogeneous
interface
IR
reflection
stealth)
MWCNT
polarization
loss
electromagnetic
wave
(EMW)
attenuation);
(3)
enhancing
insulation
EMW
impedance
match
attenuation).
Guided
by
above
theoretical
design
strategy,
superior
absorption
property
(cover
all
Ku
-band)
stealth
(Δ
T
reached
60.7
°C).
Followed
a
facial
combination
of
with
graphene
film
electrical
conductivity,
an
extremely
interference
shielding
material
(66.5
dB,
2.06
mm
thickness)
performance
average
absorption-to-reflection
(
A/R
)
coefficient
ratio
25.4
low
bandwidth
4.1
GHz
more
than
10)
experimentally
obtained
in
this
work.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
16(1)
Published: Nov. 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,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: April 2, 2024
Abstract
Microwave
absorbing
materials
(MAMs)
characterized
by
high
absorption
efficiency
and
good
environmental
tolerance
are
highly
desirable
in
practical
applications.
Both
silicon
carbide
carbon
considered
as
stable
MAMs
under
some
rigorous
conditions,
while
their
composites
still
fail
to
produce
satisfactory
microwave
performance
regardless
of
the
improvements
compared
with
individuals.
Herein,
we
have
successfully
implemented
compositional
structural
engineering
fabricate
hollow
SiC/C
microspheres
controllable
composition.
The
simultaneous
modulation
on
dielectric
properties
impedance
matching
can
be
easily
achieved
change
composition
these
composites.
formation
structure
not
only
favors
lightweight
feature,
but
also
generates
considerable
contribution
attenuation
capacity.
With
synergistic
effect
structure,
optimized
composite
exhibits
excellent
performance,
whose
strongest
reflection
loss
intensity
broadest
effective
reach
−
60.8
dB
5.1
GHz,
respectively,
its
actually
superior
those
most
previous
studies.
In
addition,
stability
tests
capacity
after
exposure
harsh
conditions
Radar
Cross
Section
simulation
data
demonstrate
that
from
optimization
a
bright
prospect
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 8, 2024
Abstract
Energy‐efficient
building
materials
are
eye‐catching
for
reducing
indoor
energy
consumption
via
eliminating
electromagnetic
interference
and
pollution,
controlling
the
thermal
transfer,
promoting
sunlight
harvesting
providing
a
comfortable
living
environment.
To
realize
broadband
microwave
shielding,
elaborate
control
of
microstructures
has
showed
great
potential
research
direction.
By
composition
regulation
structure
design
with
various
dimension,
synergistic
effects
including
conductive
networks,
interfacial
polarization,
magnetic
coupling,
dipole
dielectric‐magnetic
synergy,
can
significantly
improve
(EM)
shielding
capacity.
Thermal
management
conversion,
storage,
radiation,
conduction
enormous
in
enhancing
sustainability
efficiency
future
buildings.
Smart
windows
able
to
switch
optical
transmittance
colors,
which
is
contributed
saving
energy.
Herein,
this
review,
recent
progress
management,
smart
window
field
energy‐efficient
buildings
summarized,
from
aspects
materials,
mechanisms,
scenarios.
Further,
main
bottlenecks
problems
discussed,
opportunities
further
highlighted.
Small,
Journal Year:
2024,
Volume and Issue:
20(45)
Published: July 16, 2024
Abstract
Currently,
facing
electromagnetic
protection
requirement
under
complex
aqueous
environments,
the
bacterial
reproduction
and
organic
dye
corrosion
may
affect
composition
micro‐structures
of
absorbers
to
weaken
their
properties.
To
address
such
problems,
herein,
a
series
CoFe
2
O
4
@BCNPs
(cobalt
ferrite
@
bio‐carbon
nanoparticles)
composites
are
synthesized
via
co‐hydrothermal
calcining
process.
The
coupling
magnetic
cobalt
dielectric
derived
from
Apium
can
endow
composite
multiple
absorption
mechanisms
matched
impedance
for
effective
microwave
absorption,
attaining
bandwidth
8.12
GHz
at
2.36
mm
an
intensity
−49.85
dB
3.0
mm.
Due
ROS
(reactive
oxygen
species)
stimulation
ability
heavy
metal
ions
ferrite,
realizes
excellent
antibacterial
efficiency
99%
against
Gram
negative
bacteria
Escherichia
coli
.
Moreover,
loose
porous
layer
surface
stacked
promote
adsorption
methylene
blue
subsequent
eliminating,
high
removal
rate
90.37%
be
also
achieved.
This
paper
offers
new
insight
rational
design
composite's
component
micro‐structure
construct
multi‐functional
absorber
satisfying
demand
in
complicated
environments.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: April 8, 2024
Abstract
With
the
continuous
advancement
of
communication
technology,
escalating
demand
for
electromagnetic
shielding
interference
(EMI)
materials
with
multifunctional
and
wideband
EMI
performance
has
become
urgent.
Controlling
electrical
magnetic
components
designing
material
structure
have
attracted
extensive
interest,
but
remain
a
huge
challenge.
Herein,
we
reported
alternating
composite
films
composed
hollow
metal–organic
frameworks/layered
MXene/nanocellulose
(HMN)
by
vacuum-assisted
filtration
process.
The
HMN
exhibit
excellent
effectiveness
in
GHz
frequency
(66.8
dB
at
Ka-band)
THz
(114.6
0.1–4.0
THz).
Besides,
also
high
reflection
loss
39.7
0.7
an
effective
absorption
bandwidth
up
to
2.1
THz.
Moreover,
show
remarkable
photothermal
conversion
performance,
which
can
reach
104.6
°C
under
2.0
Sun
235.4
0.8
W
cm
−2
,
respectively.
unique
micro-
macro-structural
design
structures
will
absorb
more
incident
waves
via
interfacial
polarization/multiple
scattering
produce
heat
energy
local
surface
plasmon
resonance
effect.
These
features
make
film
promising
candidate
advanced
devices
future
6G
protection
electronic
equipment
cold
environments.
