Carbon
nanotubes
(CNTs)
show
great
promise
for
microwave
absorption
(MA)
due
to
their
excellent
electrical
conductivity
and
lightweight
properties,
which
are
conferred
by
the
one
dimensional
hollow
tubular
structure.
However,
ambiguous
intrinsic
motivations
behind
formation
of
CNTs
intricate
growth
processes
have
resulted
in
a
lack
systematic
methodology
precisely
controlling
electromagnetic
properties.
Herein,
flexible
regulation
strategy
is
designed
develop,
with
core
focus
being
directional
carbon
atoms
differential
catalysis
metal
sources.
By
improving
kinetics,
material
achieves
effective
impedance
matching
attenuation,
displaying
notable
magnetoelectric
coupling
effects.
In
particular,
COMSOL
simulations
reveal
enhanced
dielectric
loss
contributing
efficient
energy
conversion.
Ultimately,
demonstrates
minimum
reflection
(RL
Modern
detection
technology
has
driven
camouflage
toward
multispectral
compatibility
and
dynamic
regulation.
However,
developing
such
stealth
technologies
is
challenging
due
to
different
frequency-band
principles.
Here,
this
work
proposes
a
design
concept
for
fluid-actuated
compatible
smart
device
that
employs
deformable
mechanochromic
layer/elastomer
with
channeled
dielectric
layer.
After
fluid
actuation,
the
elastomer
layer
transmits
mechanical
strain
layer,
thereby
altering
visible
reflectance
wavelengths
in
[568,
699]
nm.
Concurrently,
pumped-in
liquid
reconfigures
spatial
structure
parameter
alter
microwave
resonance
diffraction
radar
absorption,
enabling
absorption
significant
broadband
at
[8.16,
18.0]
GHz.
Using
heat-absorption
property
also
achieves
infrared
stealth,
shown
by
ΔT
≈
16.5
°C
temperature
difference.
Additionally,
exhibits
rapid
response
time
(∼1
s),
excellent
cycling
performance
(100
cycles),
programmability
(10
codes),
offering
new
strategy.
Materials Chemistry Frontiers,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Electromagnetic
wave
absorbing
material
(EMWAM)
based
on
metal-organic
framework
(MOF)
has
high
loss
capacity
and
wide
absorption
bandwidth.
This
paper
reviews
recent
research
MOF-based
EMWAM
outlines
current
challenges
future
directions.
Microwaves
are
currently
used
in
many
fields,
including
the
military,
medical,
and
communication.
However,
ensuing
electromagnetic
radiation
has
seriously
threatened
human
life.
Therefore,
design
of
high-performance
microwave
absorbing
materials
(MAMs)
become
an
important
development
direction.
Metal-organic
frameworks
(MOFs)
regarded
as
a
bright
new
star
among
MAMs
with
broad
application
prospects
due
to
their
advantages
tunable
structure,
large
specific
surface
area,
high
porosity,
etc
.
This
paper
reviews
research
progress
derived
from
MOFs
recent
years,
preparation
methods,
properties
absorption
mechanisms.
Finally,
problems
MOF-derived
discussed.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 12, 2024
Abstract
Multifunctional
electromagnetic
wave
(EMW)
absorbing
materials
are
attracting
attention
because
of
their
potential
applications
in
medical,
livelihood,
and
military.
In
this
study,
a
pomegranate‐like
nanolayer
featuring
core‐shell
architecture
(PNCS)
is
prepared
using
confinement
strategy.
Introducing
metal
atoms
into
unique
design
(M‐PNCS,
M
=
Mn,
Fe,
Co,
Ni,
Cu)
effectively
tuned
the
response
improved
functions.
The
Mn‐PNCS
composite
exhibited
highest
absorption.
Its
reflection
loss
(
RL
)
reached
−62.39
dB
with
an
effective
absorption
bandwidth
(EAB)
at
1.8
mm
6.0
GHz.
As
charge
transport
capacity
increases,
its
can
be
transformed
shielding,
green
shielding
index
up
to
3.54.
On
basis,
used
fabricate
multifunctional
film
new
strain
sensor.
This
integrated
absorption,
thermal
insulation,
hydrophobicity,
flexibility,
sensing,
thus
showing
for
use
wearable
protective
clothing.
addition,
sensors
simulation
achieved
sensing
through
coupling
effect
between
patterns.
These
findings
demonstrate
that
excellent
material
technical
fields
EMW
devices.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 10, 2025
Abstract
Quantum
size
effects
and
interfacial
dimensional
interactions
enable
nanometer‐scale
hierarchical
heterostructures
to
adjust
band
structures
by
energy
level
discretization,
impurity
formation,
inversion,
allowing
for
controlled
carrier
localization
directional
relaxation.
These
unique
characteristics
show
great
potential
applications
in
ferroelectrics,
optoelectronics,
capacitors,
sensors.
Yet,
optimizing
performance
fine‐tuning
the
properties
of
nanoscale
systems,
especially
composition,
remains
a
considerable
challenge.
Here
dimensionally
confined
synthesis
is
reported
through
pyrolysis‐based
metal‐organic
framework‐on‐metal‐organic
framework
(MOF‐on‐MOF)
strategy,
resulting
continuous
metal‐carbon
carbon‐oxide
interfaces
below
50
nm.
Off‐axis
electron
holography
theoretical
calculations
are
utilized
visualize
dynamic
conversion
between
localized
free
electrons,
as
well
relaxation
processes
high‐density
magnetic
coupling
at
nanoscale.
phenomena
rarely
observed
micron‐scale
or
non‐hierarchical
heterostructures.
improvements
lead
significantly
enhanced
dielectric
properties,
efficient
interaction
with
high‐frequency
electromagnetic
(EM)
fields,
indicated
loss
bandwidth
covering
full
C‐band.
Future
work
will
explore
constructing
these
targeted
materials
examine
new
such
topological
behavior,
ferrimagnetism,
giant
magnetoresistance,
sustainability
optoelectronic
technology.
