ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 30, 2025
Terahertz
waves
are
gathering
attention
as
carrier
for
next-generation
wireless
communications
such
sixth-generation
communication
networks
and
autonomous
driving
systems.
Electromagnetic-wave
absorbers
the
terahertz-wave
region
necessary
to
ensure
information
security
avoid
interference
issues.
Herein
we
report
a
high-performance
absorber
composed
of
composite
metallic
λ-Ti3O5
insulating
TiO2
nanocrystals
(λ-Ti3O5@TiO2).
This
material
exhibits
strong
absorption
with
high
values
real
(permittivity,
ε')
imaginary
parts
(dielectric
loss,
ε″)
complex
dielectric
constant.
Furthermore,
tan(δ)
(≡
ε″/ε')
significantly
high,
ranging
from
0.50
0.76
in
frequency
range
between
0.1
1
THz.
An
ultrathin
film
thickness
48
μm
recorded
reflection
loss
-28
dB
(99.8%
terahertz
wave
is
absorbed
by
film).
A
small
has
yet
be
developed.
Not
only
does
present
exhibit
resistance
heat,
light,
water,
organic
solvents,
but
it
can
also
economically
fabricated
support
various
applications,
including
outdoor
uses.
Nano-Micro Letters,
Год журнала:
2024,
Номер
17(1)
Опубликована: Сен. 22, 2024
Abstract
Gradient
magnetic
heterointerfaces
have
injected
infinite
vitality
in
optimizing
impedance
matching,
adjusting
dielectric/magnetic
resonance
and
promoting
electromagnetic
(EM)
wave
absorption,
but
still
exist
a
significant
challenging
regulating
local
phase
evolution.
Herein,
accordion-shaped
Co/Co
3
O
4
@N-doped
carbon
nanosheets
(Co/Co
@NC)
with
gradient
been
fabricated
via
the
cooperative
high-temperature
carbonization
low-temperature
oxidation
process.
The
results
indicate
that
surface
epitaxial
growth
of
crystal
Co
domains
on
nanoparticles
realizes
adjustment
magnetic-heteroatomic
components,
which
are
beneficial
for
matching
interfacial
polarization.
Moreover,
simultaneously
realize
coupling,
long-range
diffraction.
Specifically,
synthesized
@NC
absorbents
display
strong
attenuation
capability
−
53.5
dB
at
thickness
3.0
mm
an
effective
absorption
bandwidth
5.36
GHz,
both
superior
to
those
single
embedded
matrix.
This
design
concept
provides
us
inspiration
polarization,
coupling
absorption.
Abstract
The
modulation
of
transport
properties
in
ceramic‐based
semiconductors
can
be
used
to
optimize
the
electromagnetic
response
mechanism
and
performance.
A
semiconductor
ceramic
foam
interlayer
wall
(SCFW)
is
designed
by
a
physical
vapor
deposition
method.
structural
SCFW
composed
semiconductor‐insulator‐semiconductor
layers,
incorporating
composite
system
SiC,
Al
4.8
Si
1.2
O
9.6
,
2
3
.
Moreover,
hierarchical
network
structure
controlled
pyrolysis‐deposition
kinetic
process.
Electrons
holes
are
transported
through
heterojunctions
between
SiC
achieving
effective
charge
relaxation.
matrix
provides
lightweight
(density
0.967
g
cm
−3
),
while
determines
excellent
wave
(EMW)
absorption
performance
SCFW,
with
an
bandwidth
up
14.8
GHz
under
(minimum
reflection
loss
RL
min
=
−50.6
dB).
has
been
proven
exhibit
corrosion
resistance
thermal
insulation
properties,
conductivity
0.025
W
m
−1
K
This
study
valuable
insights
into
design
dielectric
property
optimization
nanocomposites,
which
leads
strong
polarization
loss,
opening
new
avenues
for
application
EMW
absorbers,
ceramics.
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
Unique
structural
design
and
precise
compositional
adjustment
are
universally
accepted
as
effective
methods
for
the
enhancement
of
microwave
absorption
capacity.
