Structural Colors Go Active
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 4, 2025
Abstract
Structural
colors
find
wide
applications
for
color
printing,
intelligent
display,
filtering
imaging,
etc.,
owing
to
their
benefits,
including
high
resolution,
stable
properties,
and
dynamic
tunability.
This
review
first
illustrates
the
mechanisms
of
structural
generation,
such
as
surface
plasmon
resonances,
localized
Fabry‐Perot
Mie
etc.
It
then
proposes
recent
technological
strategies
employed
realize
colors.
The
integration
with
functional
materials
like
phase‐change,
along
development
control
microfluidic
chips,
micro‐electro‐mechanical
system
drivers,
microheaters,
represents
key
approaches
spectrum
regulation.
Furthermore,
assesses
performance,
advantages,
limitations
various
technologies
Finally,
this
concluded
a
section
on
future
challenges
prospects
in
large‐area
fabrication,
practical
applications,
performance
improvement.
explains
current
typical
smart
windows,
adaptive
camouflage,
sensors,
explores
processing
methods
that
can
achieve
large‐area,
high‐fidelity
preparation
colors,
nanoimprint,
deep
ultraviolet
lithography,
immersion
laser
field
promises
advancements
high‐density
data
storage,
information
encryption,
broader
market
applications.
Язык: Английский
Hydrogel-Coated Polydimethylsiloxane with Reversible Transparency for Advanced Optical Switching
ACS Nano,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 27, 2025
Functional
soft
materials
that
swell
in
water
often
exhibit
surface
wrinkling,
similar
to
the
ridges
formed
on
human
skin
after
prolonged
immersion,
typically
leading
reduced
optical
transmittance.
Surprisingly,
there
is
a
scarcity
of
are
transparent
underwater
yet
opaque
air,
despite
their
vast
potential
applications
such
as
smart
windows,
periscopes,
and
information
encryption.
Herein,
we
report
hydrogel-based
system
comprising
polyacrylamide
layer
polydimethylsiloxane
(PDMS),
demonstrating
reversible
transition
between
opacity
air
high
transparency
or
wet
conditions.
Upon
water-induced
swelling,
transmittance
hydrogel
markedly
increases
from
7.8%
77.1%
with
excellent
repeatability.
This
behavior
enables
encryption
decryption
writing.
Micro-
nanostructural
analysis
reveals
switching
arises
reduction
local
roughness
upon
swelling.
Furthermore,
when
employed
window,
effectively
reduces
solar
power
transmission
by
36%,
achieving
temperature
5.09
°C
under
direct
sunlight
while
retaining
heat
absence
sunlight.
These
findings
highlight
PDMS
versatile
platform
for
water-responsive
devices,
offering
exciting
opportunities
encryption,
interactive
writing
systems,
energy-efficient
window
technologies.
Язык: Английский
Bioinspired Microhinged Actuators for Active Mechanism‐Based Metamaterials
Advanced Science,
Год журнала:
2024,
Номер
12(2)
Опубликована: Ноя. 18, 2024
Abstract
Mechanism‐based
metamaterials,
comprising
rigid
elements
interconnected
by
flexible
hinges,
possess
the
potential
to
develop
intelligent
micromachines
with
programmable
motility
and
morphology.
However,
absence
of
efficient
microactuators
has
constrained
ability
achieve
multimodal
locomotion
active
shape‐morphing
behaviors
at
micro
nanoscale.
In
this
study,
inspiration
from
flight
mechanisms
tiny
insects
is
drawn
a
biomimetic
microhinged
actuator
integrating
compliant
soft
hydrogel
muscle.
A
Pseudo‐Rigid‐Body
mechanical
model
introduced
analyze
structural
deformation,
demonstrating
that
hydrogel‐based
microactuator
can
undergo
significant
folding
while
maintaining
high
stiffness.
Furthermore,
multiple
actuators
are
combined
facilitate
in
degrees
freedom
arbitrary
directions.
Fabricated
multi‐step
four‐dimensional
(4D)
direct
laser
writing
technique,
integrated
into
2D
3D
metamaterials
enabling
programable
shape
morphing.
Additionally,
micro‐kirigami
photonic
structures
demonstrated
show
pattern
transforming
actuated
microhinges.
This
bioinspired
design
approach
opens
new
avenues
for
development
mechanism‐based
capable
intricate
behaviors.
Язык: Английский
Hydrogel‐Based Dynamic Structural Color with Optical Janus Effect for Imaging Encryption/Concealment
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 29, 2024
Abstract
Structural
colors
are
widely
used
due
to
their
eco‐friendliness,
stability,
and
precise
controllability.
However,
achieving
dynamic
structural
typically
requires
complex
fabrication
processes
high‐quality
material
preparation.
Here,
a
simple
bilayer
structure
containing
hydrogel
micropattern
semi‐transparent
ultrathin
aluminum
film
is
proposed
that
achieves
the
color
with
Janus
effect.
Combining
experimental
research
theoretical
analysis,
it
found
by
merely
controlling
electron‐beam
exposure
dose,
colors,
patterns
these
hydrogel‐based
structures
can
be
precisely
rationally
designed.
Additionally,
thickness
swellability
of
individually
regulated,
enabling
imaging
encryption/concealment
optical
The
stability
cyclic
performance
this
verified.
environmental
sensitivity,
real‐time
adjustability,
make
suitable
for
applications
such
as
secure
information
transmission
intelligent
anti‐counterfeiting
labels.
Язык: Английский