Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 5, 2025
Abstract
Metal‐organic
framework
(MOF)
derivatives
employed
as
novel
microwave‐absorbing
materials
(MAMs)
have
garnered
significant
attention
due
to
their
diverse
in
situ
or
ex
coordinated
components
and
the
flexibility
nano‐microstructure
fabrication.
A
well‐designed
heterointerface
can
provide
an
optimal
balance
between
impedance
high‐loss
capability.
However,
precisely
tuning
semiconductor‐metal‐carbon
heterostructures
remains
a
huge
challenge.
Herein,
multi‐component
NiS/Co
3
S
4
/NiCo@CNTs/NC
nanohybrid
with
hollow
structure
is
elaborately
fabricated
using
convenient
solvothermal
method
followed
by
high‐temperature
pyrolysis,
forming
unique
heterostructure
multiple
Schottky
contacts.
This
demonstrates
remarkable
reflection
loss
value
of
−75.9
dB
at
thickness
2.6
mm.
The
transcendent
microwave
absorption
(MA)
capacity
primarily
attributed
intense
polarization
relaxation
process
superb
impedance‐matching
properties
semiconductor/metal/carbon
hybrid
barriers.
In
addition,
built‐in
electric
field
established
heterointerfaces
increases
electron
transport
capabilities.
Notably,
controllable
introduction
numerous
defects
into
carbon
layer
intensifies
interfacial
effect
nanohybrid.
study
offers
innovative
insights
mechanisms
development
high‐performance
MAMs.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
17(1)
Published: Sept. 27, 2024
Abstract
Currently,
the
demand
for
electromagnetic
wave
(EMW)
absorbing
materials
with
specific
functions
and
capable
of
withstanding
harsh
environments
is
becoming
increasingly
urgent.
Multi-component
interface
engineering
considered
an
effective
means
to
achieve
high-efficiency
EMW
absorption.
However,
modulation
has
not
been
fully
discussed
great
potential
in
field
In
this
study,
multi-component
tin
compound
fiber
composites
based
on
carbon
(CF)
substrate
were
prepared
by
electrospinning,
hydrothermal
synthesis,
high-temperature
thermal
reduction.
By
utilizing
different
properties
substances,
rich
heterogeneous
interfaces
are
constructed.
This
effectively
promotes
charge
transfer
enhances
interfacial
polarization
conduction
loss.
The
SnS/SnS
2
/SnO
/CF
abundant
have
exhibit
excellent
absorption
at
a
loading
50
wt%
epoxy
resin.
minimum
reflection
loss
(RL)
−
46.74
dB
maximum
bandwidth
5.28
GHz.
Moreover,
composite
coatings
exhibited
long-term
corrosion
resistance
Q235
steel
surfaces.
Therefore,
study
provides
strategy
design
complex
environments.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 7, 2024
Abstract
Construction
of
built‐in
electric
field
(BIEF)
in
nanohybrids
has
been
demonstrated
as
an
efficacious
strategy
to
boost
the
dielectric
loss
by
facilitating
oriented
transfer
and
transition
charges,
thus
optimizing
electromagnetic
wave
absorption
property.
However,
specific
influence
BIEF
on
interface
polarization
needs
explore
thoroughly
strength
should
be
further
augmented.
Herein,
several
systems
incorporated
Mott–Schottky
heterojunctions
hollow
structures
are
designed
constructed,
where
bimetallic
zeolitic
imidazolate
framework
employed
derive
Cu‐ZnO
heterojunctions,
hierarchical
enriched
introducing
structure
reduced
graphene
oxide.
The
well‐established
“double”
verified
theoretical
calculation
engineering
can
regulate
conductivity,
enhance
relaxation
effectively.
Especially,
there
always
coexisted
both
enhanced
charge
separation
reversed
distribution
this
BIEF,
boosting
polarization.
Attributing
synergy
well‐matched
impedance
amplified
loss,
obtained
hybrids
exhibited
superior
(reflection
−46.29
dB
ultra‐wide
effective
bandwidth
7.6
GHz
at
only
1.6
mm).
This
work
proves
innovative
model
for
dissecting
mechanisms
pioneers
a
novel
advanced
absorbers
through
enhancing
BIEF.
