Small,
Journal Year:
2023,
Volume and Issue:
19(42)
Published: June 20, 2023
The
combination
of
carbon
materials
and
magnetic
elements
is
considered
as
an
effective
strategy
to
obtain
high-performance
electromagnetic
wave
(EMW)
absorption
materials.
However,
using
nanoscale
regulation
the
optimization
composite
material
dielectric
properties
enhanced
loss
facing
significant
challenges.
Here,
constant
capability
skeleton
loaded
with
Cr
compound
particles
are
further
tuned
enhance
EMW
performance.
After
700
°C
thermal
resuscitation
Cr3-polyvinyl
pyrrolidone
material,
chromium
represented
a
needle-shaped
structure
nanoparticles,
which
fixed
on
derived
from
polymer.
size-optimized
CrN@PC
composites
obtained
after
substitution
more
electronegative
nitrogen
anion-exchange
strategy.
minimum
reflection
value
-105.9
dB
at
CrN
particle
size
5
nm,
bandwidth
7.68
GHz
(complete
Ku-band
coverage)
3.0
mm.
This
work
overcomes
limitations
impedance
matching
imbalance
deficiency
in
carbon-based
through
tuning,
opens
new
way
ultra-high
attenuation
capability.
Advanced Science,
Journal Year:
2022,
Volume and Issue:
9(10)
Published: Feb. 7, 2022
Electromagnetic
(EM)
wave
absorbing
materials
play
an
increasingly
important
role
in
modern
society
for
their
multi-functional
military
stealth
and
incoming
5G
smart
era.
Dielectric
loss
EM
absorbers
underlying
mechanism
investigation
are
of
great
significance
to
unveil
attenuation
behaviors
guide
novel
dielectric
design.
However,
current
researches
focus
more
on
synthesis
rather
than
in-depth
study.
Herein,
comprehensive
views
toward
mechanisms
including
interfacial
polarization,
dipolar
conductive
loss,
defect-induced
polarization
provided.
Particularly,
some
misunderstandings
ambiguous
concepts
each
highlighted.
Besides,
study
emphasized.
Moreover,
new
regulation
strategies
instead
regular
components
compositing
summarized
provide
inspiring
thoughts
simple
effective
behavior
modulation.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
34(11)
Published: Nov. 10, 2021
Abstract
Electromagnetic
(EM)
wave
absorption
materials
possess
exceptionally
high
EM
energy
loss
efficiency.
With
vigorous
developments
in
nanotechnology,
such
have
exhibited
numerous
advanced
functions,
including
radiation
prevention
and
antiradar
stealth.
To
achieve
improved
performance
multifunctionality,
the
elaborate
control
of
microstructures
has
become
an
attractive
research
direction.
By
designing
them
as
core–shell
structures
with
different
dimensions,
combined
effects,
interfacial
polarization,
conduction
networks,
magnetic
coupling,
magnetic–dielectric
synergy,
can
significantly
enhance
performance.
Herein,
advances
low‐dimensional
are
outlined
a
selection
most
remarkable
examples
is
discussed.
The
derived
key
information
regarding
dimensional
design,
structural
engineering,
performance,
structure–function
relationship
comprehensively
summarized.
Moreover,
investigation
cutting‐edge
mechanisms
given
particular
attention.
Additional
applications,
oxidation
resistance
self‐cleaning
also
introduced.
Finally,
insight
into
what
may
be
expected
from
this
rapidly
expanding
field
future
challenges
presented.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
34(4)
Published: Oct. 4, 2021
Electromagnetic
(EM)
absorbers
play
an
increasingly
essential
role
in
the
electronic
information
age,
even
toward
coming
"intelligent
era".
The
remarkable
merits
of
heterointerface
engineering
and
its
peculiar
EM
characteristics
inject
a
fresh
infinite
vitality
for
designing
high-efficiency
stimuli-responsive
absorbers.
However,
there
still
exist
huge
challenges
understanding
reinforcing
these
interface
effects
from
micro
macro
perspectives.
Herein,
response
mechanisms
interfacial
are
dissected
depth,
with
focus
on
advanced
characterization
as
well
theoretical
techniques.
Then,
representative
optimization
strategies
systematically
discussed
emphasis
component
selection
structural
design.
More
importantly,
most
cutting-edge
smart
functional
devices
based
reported.
Finally,
current
concrete
suggestions
proposed,
future
perspectives
this
promising
field
also
predicted.
Nano-Micro Letters,
Journal Year:
2022,
Volume and Issue:
14(1)
Published: Aug. 20, 2022
Developing
ultrabroad
radar-infrared
compatible
stealth
materials
has
turned
into
a
research
hotspot,
which
is
still
problem
to
be
solved.
Herein,
the
copper
sulfide
wrapped
by
reduced
graphene
oxide
obtain
three-dimensional
(3D)
porous
network
composite
aerogels
(CuS@rGO)
were
synthesized
via
thermal
reduction
ways
(hydrothermal,
ascorbic
acid
reduction)
and
freeze-drying
strategy.
It
was
discovered
that
phase
components
(rGO
CuS
phases)
micro/nano
structure
(microporous
nanosheet)
well-modified
modulating
additive
amounts
of
changing
ways,
resulted
in
variation
pore
structure,
defects,
complex
permittivity,
microwave
absorption,
radar
cross
section
(RCS)
value
infrared
(IR)
emissivity.
Notably,
obtained
CuS@rGO
with
single
dielectric
loss
type
can
achieve
an
bandwidth
8.44
GHz
at
2.8
mm
low
filler
content
6
wt%
hydrothermal
method.
Besides,
aerogel
realizes
minimum
reflection
(RLmin)
-
60.3
dB
lower
2
wt%.
The
RCS
reach
53.3
m2,
effectively
reduces
probability
target
being
detected
detector.
Furthermore,
laminated
architecture
multicomponent
endowed
insulation
IR
versatility.
Thus,
this
work
offers
facile
method
design
develop
rGO-based
absorbers
radar-IR
stealth.
Nano-Micro Letters,
Journal Year:
2022,
Volume and Issue:
14(1)
Published: April 19, 2022
Metal-organic
frameworks
(MOFs)
are
used
to
directly
initiate
the
gelation
of
graphene
oxide
(GO),
producing
MOF/rGO
aerogels.
The
ultralight
magnetic
and
dielectric
aerogels
show
remarkable
microwave
absorption
performance
with
ultralow
filling
contents.
development
a
convenient
methodology
for
synthesizing
hierarchically
porous
comprising
metal-organic
(GO)
building
blocks
that
exhibit
an
density
uniformly
distributed
MOFs
on
GO
sheets
is
important
various
applications.
Herein,
we
report
facile
route
MOF/reduced
(rGO)
based
GO,
which
initiated
using
MOF
crystals.
Free
metal
ions
exposed
surface
MIL-88A
nanorods
act
as
linkers
bind
nanosheets
three-dimensional
network
via
metal-oxygen
covalent
or
electrostatic
interactions.
MOF/rGO-derived
Fe3O4@C/rGO
Ni-doped
notable
(MA)
performance,
simultaneously
achieving
strong
broad
bandwidth
at
low
thickness
2.5
(-
58.1
dB
6.48
GHz)
2.8
mm
46.2
7.92
contents
0.7
0.6
wt%,
respectively.
attenuation
ability
prepared
further
confirmed
radar
cross-sectional
simulation,
attributed
synergistic
effects
their
structures
heterointerface
engineering.
This
work
provides
effective
pathway
fabricating
hybrid
offers
MA.
Nano-Micro Letters,
Journal Year:
2022,
Volume and Issue:
14(1)
Published: March 21, 2022
Conductive
hydrogels
have
potential
applications
in
shielding
electromagnetic
(EM)
radiation
interference
deformable
and
wearable
electronic
devices,
but
usually
suffer
from
poor
environmental
stability
stretching-induced
performance
degradation.
Although
organohydrogels
can
improve
the
of
materials,
their
development
is
at
expense
reducing
electrical
conductivity
thus
weakening
EM
ability.
Here,
a
MXene
organohydrogel
prepared
which
composed
network
for
electron
conduction,
binary
solvent
channels
ion
abundant
solvent-polymer-MXene
interfaces
wave
scattering.
This
possesses
excellent
anti-drying
ability,
low-temperature
tolerance,
stretchability,
shape
adaptability,
adhesion
rapid
self-healing
Two
effective
strategies
been
proposed
to
solve
problems
current
materials.
By
reasonably
controlling
content
glycerol-water
ratio
gel,
exhibit
exceptionally
enhanced
performances
compared
hydrogel
due
increased
physical
cross-linking
density
gel.
Moreover,
shows
attractive
stretching-enhanced
effectiveness,
caused
by
connection
parallel
arrangement
nanosheets.
well-designed
has
devices.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(18)
Published: Jan. 24, 2022
Abstract
Given
tunable
hybridization
structures
in
solid
solutions,
fascinating
electromagnetic
(EM)
properties
can
be
achieved
for
regulating
EM
wave
(EMW)
absorption.
Herein,
a
novel
metal–organic
cooperative
interactions
method
is
proposed
to
manipulate
the
vacancy,
interstitial,
substitutional,
and
heterointerface
molybdenum
disulfide
(MoS
2
)
solution
simultaneously,
thence
meeting
synergistic
polarization
loss
on
various
point
face
sites.
Assisted
by
coordination
between
Cu
2+
polydopamine
(PDA),
effect
of
modification
MoS
highly
improved,
which
further
lead
S
interstitial
Cu,
substitutional
N,
carbon
.
Contributing
synergetic
among
multiple
polarizations,
Cu/C@MoS
exhibit
ultrahigh
EMW
absorption
performance,
EMA
with
twice
PDA
delivers
effective
bandwidth
7.12
GHz
minimum
reflection
−48.22
dB
(2.5
mm).
The
energy
attenuation
improved
almost
266.7%
222.2%
than
C@MoS
Cu@MoS
,
respectively.
Finally,
this
work
reveals
structural
dependency
materials
establishes
an
entirely
new
model.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Sept. 23, 2023
The
remarkable
advantages
of
heterointerface
and
defect
engineering
their
unique
electromagnetic
characteristics
inject
infinite
vitality
into
the
design
advanced
carbon-matrix
wave
absorbers.
However,
understanding
interface
dipole
effects
based
on
microscopic
macroscopic
perspectives,
rather
than
semi-empirical
rules,
can
facilitate
heterointerfaces
defects
to
adjust
impedance
matching
absorption
material,
which
is
currently
lacking.
Herein,
CuCo2S4@Expanded
Graphite
heterostructure
with
multiple
cation
are
reported,
morphology,
interfaces
component
regulated
by
varying
concentration
metal
ions.
results
show
that
3D
flower-honeycomb
crystal-crystal/amorphous
abundant
effectively
conductive
polarization
losses,
achieve
balance
carbon
materials,
improve
wave.
For
sample
CEG-6,
effective
Ku
band
RLmin
-72.28
dB
bandwidth
4.14
GHz
realized
at
1.4
mm,
while
filler
loading
only
7.0
wt.
%.
This
article
reports
establishment
potential
relationship
between
heterointerfaces,
defects,
materials.
Small,
Journal Year:
2023,
Volume and Issue:
19(12)
Published: Jan. 1, 2023
Hollow
carbon
spheres
are
potential
candidates
for
lightweight
microwave
absorbers.
However,
the
skin
effect
of
pure
carbon-based
materials
frequently
induces
a
terrible
impedance
mismatching
issue.
Herein,
small-sized
NiO/Ni
particles
with
heterojunctions
on
N-doped
hollow
(NHCS@NiO/Ni)
constructed
using
SiO2
as
sacrificing
template.
The
fabricated
NHCS@NiO/Ni
displayed
excellent
absorbability
minimum
reflection
loss
-44.04
dB
matching
thickness
2
mm
and
wider
efficient
absorption
bandwidth
4.38
GHz
1.7
mm,
superior
to
most
previously
reported
Experimental
results
demonstrated
that
property
attributed
balanced
dielectric
optimized
characteristic
due
presence
heterojunctions.
Theoretical
calculations
suggested
redistribution
charge
at
interfaces
formation
dipoles
induced
by
N
dopants
defects
responsible
enhanced
conduction
polarization
losses
NHCS@NiO/Ni.
simulations
surface
current
power
densities
reveal
has-
applicable
attenuation
ability
toward
under
practical
application
scenario.
This
work
paves
an
way
reasonable
design
well-defined
nanostructures
high-efficiency
absorption.
Green Chemistry,
Journal Year:
2022,
Volume and Issue:
24(13), P. 5280 - 5290
Published: Jan. 1, 2022
In
the
face
of
increasingly
severe
electromagnetic
wave
pollution,
research
biomass-based
carbon
materials
due
to
advantages
being
green,
renewable,
environment-friendly,
porous
and
light
has
become
one
most
attractive
topics.