Since
the
explosive
growth
of
state-of-the-art
electronics
and
devices
raises
concerns
about
electromagnetic
pollution,
exploring
novel
efficient
interference
(EMI)
shielding
materials
is
desirable
crucial.
Ti3C2Tx
MXenes
hold
significant
EMI
potential
due
to
their
inherent
characteristics,
including
lightweight,
metal-like
conductivities,
unique
layered
structure,
facile
processing.
Nonetheless,
it
remains
challenging
fabricate
MXenes-based
with
capability
low
reflection.
Herein,
an
interface
modulating
strategy
designed
Ni-embedded
hollow
porous
MXene
film.
Benefiting
from
this
strategy,
impedance
matching
enhanced
magnetic
loss
simultaneously
introduced.
The
multiple
reflections,
Ohmic
loss,
interfacial
polarization
concurrently
contribute
mechanism
Accordingly,
film
delivers
impressive
effectiveness
(SET)
70.7
dB
at
a
thickness
≈55
µm,
whilst
average
reflection
(SER)
only
17.4
dB.
specific
(SSE/t)
as
high
35126
dB∙cm2∙g-1.
This
study
demonstrates
effective
routine
for
constructing
superior
minimal
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 4, 2024
Abstract
Electromagnetic
interference
(EMI)
shielding
materials
with
low
electromagnetic
(EM)
waves
reflection
characteristics
are
ideal
for
blocking
EM
radiation
and
pollution.
Materials
reflectivity
must
be
constructed
using
excellent
absorption
properties.
However,
simultaneously
possessing
both
EMI
performance
remain
scarce,
consequently,
multilayer
structures
need
to
developed.
Poly(p‐phenylene–2,6–benzobisoxazole)
nanofibers
(PNF)
prepared
by
deprotonation.
PNF
combined
MXene
heterostructure
MXene@Ni
in‐situ
growth;
MXene@Ni/PNF
acts
as
an
layer
while
MXene/PNF
reflective
layer.
Finally,
(MXene@Ni/PNF)–(MXene/PNF)
aerogels
layer‐by‐layer
freeze‐drying
based
on
the
layered
modular
design
concept.
Experimental
characterizations
revealed
that
enable
efficient
absorption‐reflection‐reabsorption
of
waves,
effectively
eliminating
EMI.
When
mass
ratio
Ni
in
is
1:6
fraction
80
wt.%,
exhibit
(71
dB)
a
very
coefficient
(R
=
0.10).
Finite
element
simulations
verified
developed
asymmetric
structural
achieve
high
characteristics.
In
addition,
display
infrared
camouflage
ability.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 14, 2024
Abstract
Human
spaceflight,
lunar
exploration
projects,
and
interstellar
travel
are
the
grand
visions
of
human
universe.
However,
energy
sustainability
these
projects
is
a
concern.
Electromagnetic
functional
materials
devices
expected
to
fulfill
their
potential
in
electronic
communication
utilization.
Herein,
hetero‐dimensional
micro‐nano
architectures
composed
Cu
3
Se
2
microspheres
reduced
graphene
oxide
(rGO)
sheets
fabricated
for
first
time
by
sacrificial
template
method,
anion
substitution
engineering,
electrostatic
adsorption,
reduction‐oxidation
reaction.
Based
on
excellent
electromagnetic
response
composites,
they
exhibit
strong
ultra‐wide
microwave
absorption
ability
with
effective
bandwidth
(EAB)
reaching
8.24
GHz
at
thickness
2.2
mm.
In
addition,
an
metamaterial
EAB
≈13.5
proposed,
exhibiting
significant
properties.
More
significantly,
composites
can
be
used
construct
range
devices:
spiral
antenna
adjustable
return
loss
gain,
maximum
gain
up
2.5
dBi;
microstrip
power
divider
that
efficiently
split
input
signal
into
four
equal
parts
output
it;
hybridized
transport
device
convert
store
energy.
This
work
provides
new
inspiration
protection,
communication,
development.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 7, 2024
Abstract
Multifunctionalization
of
electromagnetic
wave
absorbing
materials
(EMWAMs)
presents
a
promising
avenue
for
their
application
in
complex
scenarios.
However,
the
effective
integration
multiple
supplementary
functions
into
EMWAMs
continues
to
pose
significant
challenge.
Herein,
novel
nanofiber
elastomer
(NFE)
incorporating
multicomponent
inorganic
FeS
2
/S,N
co‐doped
carbon
nanofibers
(NFs)
and
organic
component
(Ecoflex)
are
designed
synthesized.
The
sulfur
doping
ratios
species
can
be
effectively
modulated
via
controlling
amount
sulfurization
temperature.
optimized
NFs/Ecoflex
NFE
not
only
exerted
an
excellent
impedance
matching
characteristic,
but
also
displays
boosted
conductive
loss
polarization
capacities.
Amongst,
achieved
ultra‐wide
absorption
bandwidth
(EAB)
7.40
GHz
minimum
reflection
(RL
min
)
−21.82
dB
at
thin
thickness
(≈2.00
mm).
Furthermore,
simultaneously
greatly
improved
mechanical
property,
thermal
insulation,
hydrophobicity,
corrosion
resistance.
Through
designing
metastructures,
with
periodically
closed‐ring
resonant
structure
realized
EAB
32.64
(ranging
from
7.36
40.00
GHz).
Overall,
this
research
contributes
valuable
insights
design
next‐generation
satisfactory
multifunctionalities,
demonstrating
potential
smart
devices
challenging
environments.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 16, 2025
Abstract
Defective
heterovalent
selenides
provide
a
spacious
arena
for
creating
emergent
electromagnetic
(EM)
phenomena
that
are
unattainable
in
the
conventional
constituent
counterparts.
However,
there
still
synthetic
methodological
challenges,
and
in‐depth
understanding
of
EM
properties,
particularly
correlation
between
tailored
polarization
sites
dielectric
response,
significantly
inadequate.
Herein,
selective
ions
exchange
strategy
driven
by
concentration‐regulated
(
Case
1
)
time‐evoked
2
approaches,
is
innovatively
proposed
to
design
series
defective
copper‐based
selenides.
The
controllable
phase
evolution
mixed
cation/anion
responsible
heterointerfaces
levels
),
while
Cu
+
/Cu
2+
electronic
configurations
controlled
cation
accounted
further
manipulating
heterointerfaces/defects
enriching
).
coupling
nonstoichiometric
2−x
Se‐containing
heterointerfaces,
unsaturated
Se
vacancies
multi‐valence
configurations,
rather
than
themselves
alone
even
at
higher
level,
imparted
abundant
trigger
boosted
response
Consequently,
this
designed
selenide
(ZnSe/CuSe/Cu
2‐x
Se)
deliveres
broad
bandwidth
6.89
GHz
compare
parent
ZnSe
without
outperforming
most
reported
metal
until
now.
This
innovative
overcame
bottlenecks
methodology,
providing
paradigm
fabricating
sophisticated
materials
versatile
applications
beyond
absorption.
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Фев. 6, 2025
Abstract
Herein,
a
novel
Janus-structured
multifunctional
membrane
with
integrated
electromagnetic
interference
(EMI)
shielding
and
personalized
thermal
management
is
fabricated
using
shear-induced
in
situ
fibrillation
vacuum-assisted
filtration.
Interestingly,
within
the
polytetrafluoroethylene
(PTFE)-carbon
nanotube
(CNT)-Fe
3
O
4
layer
(FCFe),
CNT
nanofibers
interweave
PTFE
fibers
to
form
stable
“silk-like”
structure
that
effectively
captures
Fe
particles.
By
incorporating
highly
conductive
MXene
layer,
FCFe/MXene
(FCFe/M)
exhibits
excellent
electrical/thermal
conductivity,
mechanical
properties,
flame
retardancy.
Impressively,
benefiting
from
rational
regulation
of
component
proportions
design
Janus
structure,
FCFe/M
thickness
only
84.9
µm
delivers
outstanding
EMI
effectiveness
44.56
dB
X-band,
normalized
specific
SE
reaching
10,421.3
cm
2
g
−1
,
which
attributed
“absorption-reflection-reabsorption”
mechanism.
Furthermore,
demonstrates
low-voltage-driven
Joule
heating
fast-response
photothermal
performance.
Under
stimulation
V
voltage
an
optical
power
density
320
mW
−2
surface
temperatures
membranes
can
reach
up
140.4
145.7
°C,
respectively.
In
brief,
anti-electromagnetic
radiation
temperature
attractive
candidate
for
next
generation
wearable
electronics,
compatibility,
visual
heating,
thermotherapy,
military
aerospace
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 16, 2025
Abstract
Multifunctional
materials
that
muster
electromagnetic
waves
absorption
(EMA)
and
thermal
conduction
features
are
highly
desirable
in
electronic
packaging
of
advanced
electronics.
However,
traditional
carbon‐based
ceramic‐based
often
rely
on
semiempirical
rules
when
preparing
these
bifunctional
composites
because
incompatibility
between
dielectric
behavior
conductivity.
Herein,
two
(SiC@RGO/EP
(SCGE)
Si
3
N
4
@RGO/EP
(SNGE))
with
different
obtained
by
assembling
1D
ceramics
whiskers
2D
graphene
sheets
to
construct
3D
porous
skeleton
followed
epoxy
(EP)
encapsulation
understand
this
underlying
relationship.
Since
semiconductor‐type
silicon
carbide
(SiC)
enhance
the
conductivity
response
material,
thereby
significantly
intensifying
loss,
SCGE
material
harvests
remarkable
minimal
reflection
loss
values
(RL
min
)
−85.92
dB
at
2.07
mm,
which
outperform
reported
SiC‐based
EMA
so
far.
Whereas
SNGE
prepared
introducing
insulator
nitride
(Si
only
delivers
(0.86
W
m
−1
K
close
(0.93
),
but
performance
is
dramatically
reduced
RL
−19.88
5
mm.
The
finding
work
offers
new
insights
for
modulating
ceramic
achieve
integration
functions.
