RSC Advances,
Journal Year:
2023,
Volume and Issue:
13(32), P. 22205 - 22215
Published: Jan. 1, 2023
Microwave
absorbing
architectures
have
gained
a
great
deal
of
attention
due
to
their
widespread
application
in
diverse
fields,
especially
refining
electromagnetic
pollution.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: Aug. 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
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: July 10, 2023
Wearable
devices
with
efficient
thermal
management
and
electromagnetic
interference
(EMI)
shielding
are
highly
desirable
for
improving
human
comfort
safety.
Herein,
a
multifunctional
wearable
carbon
fibers
(CF)
@
polyaniline
(PANI)
/
silver
nanowires
(Ag
NWs)
composites
"branch-trunk"
interlocked
micro/nanostructure
were
achieved
through
"three-in-one"
multi-scale
design.
The
reasonable
assembly
of
the
three
kinds
one-dimensional
(1D)
materials
can
fully
exert
their
excellent
properties
i.e.,
superior
flexibility
CF,
robustness
PANI,
splendid
conductivity
AgNWs.
Consequently,
constructed
flexible
composite
demonstrates
enhanced
mechanical
tensile
stress
1.2
MPa,
which
was
almost
6
times
that
original
material.
This
is
mainly
attributed
to
fact
PNAI
(branch)
firmly
attached
CF
(trunk)
polydopamine
(PDA),
forming
robust
structure.
Meanwhile,
possesses
insulation
heat
preservation
capacity
owing
synergistically
low
emissivity.
More
importantly,
conductive
path
established
by
1D
greatly
improved
its
EMI
property
Joule
heating
performance
at
applied
voltage.
work
paves
way
rational
utilization
intrinsic
materials,
as
well
provides
promising
strategy
designing
protection
energy
devices.
Small Structures,
Journal Year:
2023,
Volume and Issue:
4(11)
Published: Aug. 8, 2023
Microwave
absorbing
materials
(MAMs)
are
that
effectively
absorb
incident
electromagnetic
(EM)
wave
energy,
reducing
reflection
and
scattering.
They
play
a
crucial
role
in
enhancing
electronic
reliability,
healthcare,
defense
security.
However,
traditional
MAMs
like
ferrites,
magnetic
metals,
polymers
possess
certain
limitations,
including
low
impedance
matching,
narrow
absorption
bandwidth,
poor
chemical
stability,
high
filling
ratio,
which
hinder
their
further
development.
To
address
the
requirements
of
lightweight,
wideband,
high‐efficiency
absorption,
precise
structural
design
has
emerged
as
captivating
research
focus.
Additionally,
comprehending
structure
–
property
relationships
between
these
unique
microstructures
EM
response
loss
mechanisms
still
poses
significant
challenges.
Herein,
comprehensive
review
is
presented
with
varied
designs
encompassing
various
scales,
providing
detailed
introduction
relationship
potential
corresponding
characteristics
mechanisms.
Moreover,
theoretical
calculation
models,
characterization,
analysis
methods
discussed.
Finally,
article
proposes
challenges
prospects
for
development
absorbers.
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.