Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(23)
Published: Feb. 28, 2023
Abstract
Structural
colorful
cholesterics
show
impressive
susceptibility
to
external
stimulation,
leading
applications
in
electro/mechano‐chromic
devices.
However,
out‐of‐plane
actuation
of
structural
actuators
based
on
and
the
integration
with
other
stimulation
remains
underdeveloped.
Herein,
motile
humidity
sensors
are
developed
using
humidity‐responsive
cholesteric
liquid
crystal
networks
(CLCNs)
magnetic
composites.
The
actuator
can
exhibit
synergistic
shape
morphing
color
change
response
humidity,
CLCNs
as
artificial
muscles.
Through
control,
sensor
be
navigated
open
confined
spaces
aid
friction
detect
local
relative
humidity.
multi‐stimulation
will
expand
research
frontier
for
spaces.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(39)
Published: March 22, 2023
Abstract
The
rapid
development
of
additive
manufacturing
has
fueled
a
revolution
in
various
research
fields
and
industrial
applications.
Among
the
myriad
advanced
3D
printing
techniques,
two‐photon
polymerization
lithography
(TPL)
uniquely
offers
significant
advantage
nanoscale
print
resolution,
been
widely
employed
diverse
fields,
for
example,
life
sciences,
materials
mechanics,
microfluidics.
More
recently,
by
virtue
optical
transparency
most
resins
used,
TPL
is
finding
new
applications
optics
photonics,
with
nanometer
to
millimeter
feature
dimensions.
It
enables
minimization
elements
systems,
exploration
light‐matter
interactions
degrees
freedom,
never
possible
before.
To
review
recent
progress
related
research,
it
starts
fundamentals
material
formulation,
then
discusses
novel
fabrication
methods,
wide
range
These
notably
include
diffractive,
topological,
quantum,
color
optics.
With
panoramic
view
development,
concluded
insights
perspectives
future
potential
Nature Communications,
Journal Year:
2021,
Volume and Issue:
12(1)
Published: Jan. 4, 2021
Four-dimensional
(4D)
printing
of
shape
memory
polymer
(SMP)
imparts
time
responsive
properties
to
3D
structures.
Here,
we
explore
4D
a
SMP
in
the
submicron
length
scale,
extending
its
applications
nanophononics.
We
report
new
photoresist
based
on
Vero
Clear
achieving
print
features
at
resolution
~300
nm
half
pitch
using
two-photon
polymerization
lithography
(TPL).
Prints
consisting
grids
with
size-tunable
multi-colours
enabled
study
effects
achieve
large
visual
shifts
through
nanoscale
structure
deformation.
As
nanostructures
are
flattened,
colours
and
printed
information
become
invisible.
Remarkably,
effect
recovers
original
surface
morphology
along
structural
colour
within
seconds
heating
above
glass
transition
temperature.
The
high-resolution
excellent
reversibility
both
microtopography
optical
promises
platform
for
temperature-sensitive
labels,
hiding
anti-counterfeiting,
tunable
photonic
devices.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(51)
Published: Feb. 6, 2022
Abstract
A
novel
and
versatile
shape
memory
ink
system
allowing
4D
printing
with
light
at
the
macroscale
as
well
microscale
is
presented.
Digital
processing
(DLP)
direct
laser
writing
(DLW)
are
selected
suitable
3D
technologies
to
cover
both
regimes.
First,
a
based
on
monofunctional
isobornyl
acrylate
two
crosslinkers
consisting
of
soft
hard
diacrylate
identified
proven
be
compatible
techniques.
Employing
DLP,
large
variety
structures
exhibiting
distinct
complexity
printed.
These
range
from
simple
frames
more
demanding
geometries
such
double
platform
structures,
infinity
rings,
or
cubic
grids.
The
effect
demonstrated
for
all
geometries.
Excellent
fixity
recovery
repeatability
shown.
Furthermore,
formulation
adapted
fast
using
DLW.
Importantly,
printed
microstructures
display
remarkable
properties.
possibility
trapping
releasing
microobjects,
microspheres,
ultimately
by
designing,
smart
box‐like
that
can
thermally
actuated—evidencing
versatility
potential
reported
system.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
34(3)
Published: Oct. 29, 2021
Abstract
Recent
years
have
seen
major
advances
in
the
developments
of
both
additive
manufacturing
concepts
and
responsive
materials.
When
combined
as
4D
printing,
process
can
lead
to
functional
materials
devices
for
use
health,
energy
generation,
sensing,
soft
robots.
Among
materials,
liquid
crystals,
which
deliver
programmed,
reversible,
rapid
responses
air
underwater,
are
a
prime
contender
manufacturing,
given
their
ease
adaptability
many
different
applications.
In
this
paper,
selected
works
compared
analyzed
come
didactical
overview
crystal‐additive
junction.
Reading
from
front
back
gives
reader
comprehensive
understanding
options
challenges
field,
while
researchers
already
experienced
either
crystals
or
encouraged
scan
through
text
see
how
they
incorporate
into
own
work.
The
educational
is
closed
with
proposals
future
research
crossover
field.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
35(23)
Published: Dec. 3, 2022
Liquid
crystal
elastomers
(LCEs)
are
renowned
for
their
large,
reversible,
and
anisotropic
shape
change
in
response
to
various
external
stimuli
due
lightly
cross-linked
polymer
networks
with
an
oriented
mesogen
direction,
thus
showing
great
potential
applications
robotics,
bio-medics,
electronics,
optics,
energy.
To
fully
take
advantage
of
the
stimuli-responsive
behaviors
LCEs,
it
is
preferable
achieve
a
locally
controlled
alignment
into
monodomain
orientations.
In
recent
years,
application
4D
printing
LCEs
opens
new
doors
simultaneously
programming
3D
geometry,
offering
more
opportunities
higher
feasibility
fabrication
4D-printed
LCE
objects
desirable
properties.
Here,
state-of-the-art
advances
reviewed,
emphasis
on
both
mechanisms
applications.
First,
fundamental
properties
working
principles
representative
techniques
briefly
introduced.
Then,
by
advantages
over
conventional
manufacturing
methods
demonstrated.
Finally,
perspectives
current
challenges
development
trends
toward
discussed,
which
may
shed
light
future
research
directions
this
field.
Abstract
Animals
can
modify
their
body
shape
and/or
color
for
protection,
camouflage
and
communication.
This
adaptability
has
inspired
fabrication
of
actuators
with
structural
changes
to
endow
soft
robots
additional
functionalities.
Using
liquid
crystal-based
materials
is
a
promising
approach.
In
this
review,
we
discuss
the
current
state
potential
applications
these
in
robotic
devices.
Deleted Journal,
Journal Year:
2023,
Volume and Issue:
1(1)
Published: July 27, 2023
Abstract
Photonic
actuators,
serving
as
an
emerging
kind
of
intelligent
stimuli‐responsive
material,
can
exhibit
the
abilities
to
change
their
structural
colors/fluorescence
and
shapes
under
specific
external
stimuli,
which
have
demonstrated
essential
applications
in
fields
soft
robotics,
sensors,
bionics,
information
storage,
anti‐counterfeiting,
energy
harvesting.
In
this
review,
we
reported
state‐of‐the‐art
research
progress
photonic
actuators
classified
on
basis
material
type
focusing
actuation
mechanisms,
design
principles,
processing
techniques.
We
also
broadly
summarized
relative
robots,
so
on.
Finally,
a
vision
for
challenges
area
future
promising
directions
is
presented.
Small Methods,
Journal Year:
2022,
Volume and Issue:
6(7)
Published: May 6, 2022
Structural
colors
from
photonic
crystals
(PCs)
have
attracted
emerging
attention
in
the
research
area
of
wearable
sensors.
Conventional
self-assembly
PC
takes
days
to
weeks.
Here,
a
fast
method
with
horizontal
precipitation
silica
nanoparticles
(NPs)
polydimethylsiloxane
fence,
which
can
be
completed
within
1-4
h
depending
on
fence
parameters,
is
introduced.
The
resultant
exhibits
tunable
structural
entire
visible
spectrum.
With
infiltration
composite
hydrogels
containing
acrylic
acid,
acrylamide,
chitosan,
and
carbon
nanotubes
(CNTs)
into
gaps
NPs
form
an
inverse
opal
PC,
color
hydrogel
that
quickly
respond
different
stimuli,
including
strain
temperature,
obtained.
Moreover,
addition
CNTs,
also
output
electronic
signal
together
optical
changes.
Based
these
extraordinary
responsive
behaviors,
sensor
for
quantitative
feedback
external
stimuli
stretching,
bending,
pressing,
thermal
brilliant
change
outputs
simultaneously,
demonstrated.
This
fast-assembled
excellent
properties
has
great
potential
applications
devices,
mechanical
sensors,
temperature
colorimetric
displays.
