Advanced Functional Materials,
Год журнала:
2023,
Номер
33(15)
Опубликована: Янв. 31, 2023
Abstract
Atomic‐molecular
engineering
is
an
effective
way
to
accurately
tailor
the
microstructures
and
components
of
materials
at
micro‐nano
scale,
which
can
be
applied
flexibly
manipulate
their
electromagnetic
(EM)
response.
Herein,
graphene
microlaminates
with
multi‐layer
structure
are
fabricated
by
atomic
cluster
oxidative
molecular
layer
deposition
for
first
time.
The
enable
a
tunable
EM
loss
(from
0.93
3.94
imaginary
permittivity
from
0.17
0.25
permeability)
changing
poly(3,4‐ethylenedioxythiophene)
cycles,
attenuation
constant
reaches
160.
On
this
basis,
multifunctional
antennas
conceived,
achieving
frequency‐selective
response
that
enables
steady
harvest
>
90%
energy
signal
source,
tactfully
recycling
waste
heat
mechanical
energy.
This
study
will
furnish
new
horizon
information
transmission
artificial
intelligence
in
future.
Advanced Materials,
Год журнала:
2023,
Номер
35(16)
Опубликована: Янв. 27, 2023
Flexible
multifunctional
polymer-based
electromagnetic
interference
(EMI)
shielding
composite
films
have
important
applications
in
the
fields
of
5G
communication
technology,
wearable
electronic
devices,
and
artificial
intelligence.
Based
on
design
a
porous/multilayered
structure
using
polyimide
(PI)
as
matrix
polymethyl
methacrylate
(PMMA)
microspheres
template,
flexible
(Fe3
O4
/PI)-Ti3
C2
Tx
-(Fe3
/PI)
with
controllable
pore
sizes
distribution
Ti3
hollow
are
successfully
prepared
by
sacrificial
template
method.
Owing
to
structure,
when
size
is
10
µm
mass
ratio
PMMA/Ti3
2:1,
film
has
most
excellent
EMI
performance,
effectiveness
(EMI
SE)
85
dB.
It
further
verified
finite
element
simulation
that
an
effect
waves.
In
addition,
good
thermal
conductivity
(thermal
coefficient
3.49
W
(m·K)-1
)
mechanical
properties
(tensile
strength
65.3
MPa).
This
conductivity,
demonstrated
great
potential
for
protection
high-power,
portable,
devices.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(34)
Опубликована: Июнь 14, 2022
Abstract
Polymeric
metal‐organic
framework
(MOF)‐derived
composites
are
promising
functional
materials
because
of
their
exceptional
chemical
homogeneity,
designable
components,
and
adjustable
pore
size.
The
modulation
oxygen
Mn
vacancies
via
the
introduction
heteroatoms
changes
in
annealing
temperature
MOFs‐derived
can
be
a
possible
solution
to
investigate
polarization
loss
mechanism,
which
facilitates
improvement
electromagnetic
capacity.
Herein,
design
laminate‐stacked
sphere‐shaped
trimetallic
CoNiMn‐MOFs
is
presented.
derived
CoNi/MnO@C
retain
original
topography
MOFs.
concentration
increases
with
incorporation
heteroatoms,
but
decreases
temperature,
prevails
mechanism
rather
than
contribution
2+
heterogeneous
interfaces.
Therefore,
minimum
reflection
sample
demonstrates
−55.2
dB
at
2.6
mm
broad
effective
absorption
bandwidth
reaches
8.0
GHz
2.1
mm.
This
work
expected
provide
meaningful
insights
into
significant
effect
ion
vacancy
on
EM
wave‐absorbing
performance
Mn‐based
composites.
Nano-Micro Letters,
Год журнала:
2022,
Номер
14(1)
Опубликована: Апрель 30, 2022
Abstract
With
the
innovation
of
microelectronics
technology,
heat
dissipation
problem
inside
device
will
face
a
severe
test.
In
this
work,
cellulose
aerogel
(CA)
with
highly
enhanced
thermal
conductivity
(TC)
in
vertical
planes
was
successfully
obtained
by
constructing
vertically
aligned
silicon
carbide
nanowires
(SiC
NWs)/boron
nitride
(BN)
network
via
ice
template-assisted
strategy.
The
unique
structure
SiC
NWs
connected
to
BN
ensures
that
TC
composite
direction
reaches
2.21
W
m
−1
K
at
low
hybrid
filler
loading
16.69
wt%,
which
increased
890%
compared
pure
epoxy
(EP).
addition,
relying
on
porous
CA,
EP-based
also
showed
higher
than
other
comparative
samples
horizontal
direction.
Meanwhile,
exhibits
good
electrically
insulating
volume
electrical
resistivity
about
2.35
×
10
11
Ω
cm
and
displays
excellent
electromagnetic
wave
absorption
performance
minimum
reflection
loss
−
21.5
dB
wide
effective
bandwidth
(<
dB)
from
8.8
11.6
GHz.
Therefore,
work
provides
new
strategy
for
manufacturing
polymer-based
composites
multifunctional
performances
microelectronic
packaging
applications.
ACS Nano,
Год журнала:
2022,
Номер
16(4), С. 6700 - 6711
Опубликована: Март 25, 2022
High-strength,
flexible,
and
multifunctional
characteristics
are
highly
desirable
for
electromagnetic
interference
(EMI)
shielding
materials
in
the
field
of
electric
devices.
In
this
work,
inspired
by
natural
nacre,
we
fabricated
large-scale,
layered
MXene/amarid
nanofiber
(ANF)
nanocomposite
papers
blade-coating
process
plus
sol-gel
conversion
step.
The
as-synthesized
possess
excellent
mechanical
performance,
that
is,
exceptional
tensile
strength
(198.80
±
5.35
MPa),
large
strain
(15.30
1.01%),
good
flexibility
(folded
into
various
models
without
fracture),
which
ascribed
to
synergetic
interactions
interconnected
three-dimensional
network
frame
hydrogen
bonds
between
MXene
ANF.
More
importantly,
with
extensive
continuous
conductive
paths
formed
nanosheets
present
a
high
EMI
effectiveness
13188.2
dB
cm2
g-1
frequency
range
8.2-12.4
GHz.
interestingly,
show
Joule
heating
performance
fast
thermal
response
(<10
s)
low
driving
voltage
(≤4
V).
As
such,
large-scale
MXene/ANF
considered
as
promising
alternatives
wide
applications
management.
Nano-Micro Letters,
Год журнала:
2022,
Номер
15(1)
Опубликована: Дек. 15, 2022
Application
of
novel
radio
technologies
and
equipment
inevitably
leads
to
electromagnetic
pollution.
One-dimensional
polymer-based
composite
membrane
structures
have
been
shown
be
an
effective
strategy
obtain
high-performance
microwave
absorbers.
Herein,
we
reported
a
one-dimensional
N-doped
carbon
nanofibers
material
which
encapsulated
the
hollow
Co3SnC0.7
nanocubes
in
fiber
lumen
by
electrospinning.
Space
charge
stacking
formed
between
nanoparticles
can
channeled
longitudinal
fibrous
structures.
The
dielectric
constant
fibers
is
highly
related
carbonization
temperature,
great
impedance
matching
achieved
synergetic
effect
network.
At
800
°C,
necklace-like
Co3SnC0.7/CNF
with
5%
low
load
achieves
excellent
RL
value
-
51.2
dB
at
2.3
mm
absorption
bandwidth
7.44
GHz
thickness
2.5
mm.
multiple
wave
(EMW)
reflections
interfacial
polarization
internal
contribute
major
attenuating
EMW.
These
strategies
for
regulating
performance
expanded
other
functional
materials
facilitate
development
emerging
