Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Oct. 21, 2024
Surface
modulation
strategies
have
spurred
great
interest
with
regard
to
regulating
the
morphology,
dispersion
and
flexible
processability
of
materials.
Unsurprisingly,
customized
surfaces
is
primed
offer
a
route
control
their
electronic
functions.
To
regulate
electromagnetic
wave
(EMW)
absorption
applications
by
surface
engineering
an
unmet
challenge.
Thanks
pyrolyzing
surface-anchored
metal-porphyrin,
here
we
report
on
four-nitrogen
atoms-confined
single
metal
site
nitrogen-doped
carbon
layer
(sM(N4)@NC,
M
=
Ni,
Co,
Cu,
Ni/Cu)
(sM=single
metal;
NC=
layer)
that
registers
absorption.
Surface-anchored
metal-porphyrins
are
afforded
attaching
them
onto
polypyrrole
via
prototypical
click
reaction.
Further,
sM(N4)@NC
experimentally
found
elicit
identical
dipole
polarization
loss
mechanism,
overcoming
handicaps
conductivity
loss,
defects,
interfacial
among
current
EMW
absorber
models.
Importantly,
exhibit
effective
bandwidth
6.44
reflection
−51.7
dB,
preceding
state-of-the-art
carbon-based
absorbers.
This
study
introduces
strategy
design
absorbers
based
sites
enable
fine-tunable
controlled
mechanism
atomistic
precision.
In
this
work,
Cheng
et
al.
unique
dipole-dominated
model
excluding
other
redundant
opening
avenue
for
exploring
future
academic
studies
industrially
applicable
absorbing
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 27, 2024
Abstract
By
manipulating
their
asymmetric
electronic
spin
states,
the
unique
structures
and
unsaturated
coordination
environments
of
single
atoms
can
be
effectively
harnessed
to
control
magnetic
properties.
In
this
research,
first
investigation
is
presented
into
regulation
properties
through
states
atoms.
Magnetic
single‐atom
one‐dimensional
materials,
M‐N‐C/ZrO
2
(M
=
Fe,
Co,
Ni),
with
varying
are
design
synthesize
based
on
orbital
structure
model.
The
SAs
3
d
electron
composite
M‐N‐C
modulates
magneto
physical
triggers
a
natural
resonance
loss,
which
achieves
controllable
tuning
effective
absorption
band
under
low‐frequency
conditions.
minimum
reflection
loss
(
RL
min
)
reach
‐69.71
dB,
bandwidth
EAB
ratio
as
high
91%
(2–18
GHz).
current
work
provides
path
toward
achieving
modulation
electromagnetic
wave
bands
by
exploring
mechanism
atomic
even
level
interactions
influence
modulation.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(33)
Published: April 24, 2024
Abstract
High
entropy
alloys
(HEAs)
are
promising
electromagnetic
wave
absorption
(EMA)
materials
due
to
its
designable
crystal
structure,
variable
properties,
and
excellent
corrosion
resistance.
However,
the
impedance
mismatch
owing
high
electric
dielectric
conductivity
severely
hinders
application
of
HEAs
in
field
EMA.
Herein,
lattice
distortion
FeCoNiCu
HEA
is
manipulated
accurately
by
doping
annealing
strategies
tailor
EMA
properties.
Significant
observed
FeCoNiCuC
0.37
,
which
leads
a
decrease
electrical
creation
abundant
dipoles.
Owing
optimal
matching
boosted
polarization
loss,
delivers
minimal
reflection
loss
−65.4
dB
accompanied
an
effective
bandwidth
(EAB)
6.81
GHz.
After
at
200
°C,
EAB
further
increased
7.99
GHz
1.95
mm,
better
than
that
most
HEA‐based
absorbers
reported
so
far.
Moreover,
it
demonstrates
resistance
more
tortuous
diffusion
path
corrosive
medium
origin
from
distortion.
Thus,
study
provides
new
insight
into
designing
performance
with
superior
anti‐corrosion
property
engineering.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 5, 2024
Abstract
Hierarchical
microarchitecture
engineering
is
a
state‐of‐the‐art
approach
to
designing
aerogel
electromagnetic
(EM)
wave
absorbers,
offering
huge
potential
in
improving
EM
energy
dissipation.
However,
the
intrinsic
feedback
mechanism
regarding
specific
influence
of
each
parameter
on
properties
not
comprehensively
revealed,
making
it
challenging
fully
utilize
aerogels
achieve
superior
absorption
performance.
Herein,
range
MXene/rGO‐based
with
multilevel
hierarchical
configurations
are
fabricated
by
magnetic
field‐guided
strategy.
Leveraging
growth
thermodynamics
effects
under
field
and
bridging
effect
between
adjacent
rGO
units,
three
models
(lamellae
ordering,
interlayer
spacing,
layer
thickness)
constructed
aerogels.
Remarkably,
progressively
improve
reflection
loss
(
RL
),
effective
bandwidth
(EAB),
matching
thickness
enhancing
dielectric
loss,
decoupling
attenuation‐impedance
matching,
adjusting
power
density,
respectively.
Consequently,
exhibit
stepwise
enhancement
performance,
achieving
−64.6
dB
broad
EAB
7.0
GHz
at
1.8
mm
thickness,
surpassing
alternative
other
configurations.
This
work
elucidates
synergistic
multi‐effect
dissipation
waves
aerogels,
providing
insights
for
advanced
absorbers
through
diverse
strategies.
Small Methods,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 7, 2024
Abstract
Over
the
past
century,
extensive
research
has
been
carried
out
on
various
types
of
microwave
absorption
(MA)
materials,
primarily
emphasizing
mechanism,
performance,
and
even
toward
smart
device.
However,
deactivation,
a
crucial
concern
for
practical
applications,
long
long‐neglected.
In
this
work,
an
in‐depth
exploration
deactivation
mechanism
reveals
significant
competition
between
metal
oxygen,
leading
to
replacement
S‐M
(M
=
Ni
Co)
bond
by
new
S─O
surface
absorber.
This
substitution
initiates
series
collapse
effect
that
introduces
additional
defective
sites
diminishes
potential
charge
transport.
Subsequently,
passive
active
anti‐deactivation
strategies
are
developed
target
deactivation.
The
strategy
involved
intentionally
creating
electron‐deficient
structures
at
initial
Co
in
crystal
through
Fe
doping
engineering,
with
objective
preventing
generation
bonds.
Furthermore,
allows
precise
control
absorber
reactivation
employing
accelerated
thermodynamic
kinetic
methods,
enabling
reversible
transformation
competitive
reactions
Finally,
fast
method
is
first
proposed
promising
stimulate
further
innovations
breakthroughs
applications.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Oct. 21, 2024
Surface
modulation
strategies
have
spurred
great
interest
with
regard
to
regulating
the
morphology,
dispersion
and
flexible
processability
of
materials.
Unsurprisingly,
customized
surfaces
is
primed
offer
a
route
control
their
electronic
functions.
To
regulate
electromagnetic
wave
(EMW)
absorption
applications
by
surface
engineering
an
unmet
challenge.
Thanks
pyrolyzing
surface-anchored
metal-porphyrin,
here
we
report
on
four-nitrogen
atoms-confined
single
metal
site
nitrogen-doped
carbon
layer
(sM(N4)@NC,
M
=
Ni,
Co,
Cu,
Ni/Cu)
(sM=single
metal;
NC=
layer)
that
registers
absorption.
Surface-anchored
metal-porphyrins
are
afforded
attaching
them
onto
polypyrrole
via
prototypical
click
reaction.
Further,
sM(N4)@NC
experimentally
found
elicit
identical
dipole
polarization
loss
mechanism,
overcoming
handicaps
conductivity
loss,
defects,
interfacial
among
current
EMW
absorber
models.
Importantly,
exhibit
effective
bandwidth
6.44
reflection
−51.7
dB,
preceding
state-of-the-art
carbon-based
absorbers.
This
study
introduces
strategy
design
absorbers
based
sites
enable
fine-tunable
controlled
mechanism
atomistic
precision.
In
this
work,
Cheng
et
al.
unique
dipole-dominated
model
excluding
other
redundant
opening
avenue
for
exploring
future
academic
studies
industrially
applicable
absorbing
