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 Materials,
Journal Year:
2023,
Volume and Issue:
36(12)
Published: Feb. 21, 2023
Abstract
Precise
monitoring
of
the
humidity
level
is
important
for
living
comfort
and
many
applications
in
various
industrial
sectors.
Humidity
sensors
have
thus
become
one
among
most
extensively
studied
used
chemical
by
targeting
a
maximal
device
performance
through
optimization
components
working
mechanism.
Among
different
moisture‐sensitive
systems,
supramolecular
nanostructures
are
ideal
active
materials
next
generation
highly
efficient
sensors.
Their
noncovalent
nature
guarantees
fast
response,
high
reversibility,
recovery
time
sensing
event.
Herein,
enlightening
recent
strategies
on
use
showcased.
The
key
indicators
sensing,
including
operation
range,
sensitivity,
selectivity,
speed
discussed
as
milestones
true
practical
applications.
Some
remarkable
examples
supramolecular‐based
presented,
describing
finest
materials,
operating
principles,
mechanisms,
latter
being
based
structural
or
charge‐transport
changes
triggered
interaction
with
ambient
humidity.
Finally,
future
directions,
challenges,
opportunities
development
beyond
state
art
discussed.
Materials Horizons,
Journal Year:
2023,
Volume and Issue:
10(8), P. 2824 - 2844
Published: Jan. 1, 2023
This
review
provides
a
comprehensive
summary
of
humidity-responsive
liquid
crystalline
systems,
ranging
from
the
mechanism
and
preparation
systems
to
application
emerging
materials.
Advanced Intelligent Systems,
Journal Year:
2021,
Volume and Issue:
3(4)
Published: Feb. 22, 2021
Worldwide
research
in
microrobotics
has
exploded
the
past
two
decades,
leading
to
development
of
microrobots
propelled
various
manners.
Despite
significant
advances
field
and
successful
demonstration
a
wide
range
applications,
have
yet
become
preferred
choice
outside
laboratory
environment.
After
introducing
available
microrobotic
propulsion
control
mechanisms,
that
are
manufactured
powered
by
light
focused
herein.
Referring
pioneering
works
recent
interesting
examples,
is
presented
not
only
as
fabrication
tool,
means
two‐photon
polymerization
direct
laser
writing,
but
also
an
actuator
for
both
hard
soft
stimuli–responsive
polymers.
In
this
scenario,
number
challenges
prevent
polymeric
light‐powered
from
reaching
their
full
potential
identified,
whereas
solutions
overcome
said
suggested.
As
outlook,
real‐world
applications
should
be
particularly
suited
mentioned,
together
with
needed
them
achieve
such
purposes.
An
interdisciplinary
approach
combining
materials
science,
microfabrication,
photonics,
data
science
conducive
next
generation
will
ultimately
foster
translation
into
real
world.
Advanced Photonics Research,
Journal Year:
2021,
Volume and Issue:
2(7)
Published: March 29, 2021
Cholesteric
liquid
crystals
(CLCs)
are
a
major
class
of
photonic
materials
that
display
selective
reflection
properties
arising
from
their
helical
ordering.
The
temperature
response
CLCs,
comprising
dynamic
color
changes
upon
variation
temperature,
is
exploited
using
material
systems
consisting
small
mesogenic
molecules,
polymer‐dispersed
(PDLCs),
polymer‐stabilized
(PSLCs),
or
liquid‐crystalline
polymers.
Taking
advantage
the
easy
processability
and
flexibility
molecular
design,
these
temperature‐responsive
CLCs
fabricated
into
different
forms
devices,
including
cells,
coatings,
free‐standing
films,
3D
objects.
Temperature‐responsive
devices
developed
integrated
for
application
in
sensors,
energy‐saving
smart
windows,
labels,
actuators,
adding
aesthetically
pleasing
features
to
common
Herein,
device
capabilities
summarized:
PDLCs,
PSLCs,
CLC
For
each
system,
examples
presented,
with
responsiveness
underlying
mechanisms
discussed.
In
addition,
potential
system
future
applications
product
developments
envisioned.
Micro,
Journal Year:
2021,
Volume and Issue:
1(2), P. 164 - 180
Published: Sept. 25, 2021
3D
printing
by
two-photon
polymerization
enables
the
fabrication
of
microstructures
with
complex
shapes
and
critical
dimensions
a
few
hundreds
nanometers.
On
state-of-the
art
commercial
systems,
an
immense
design
freedom
can
be
put
into
practice
direct
laser
writing
using
precise
technology,
which
makes
this
approach
highly
attractive
for
different
applications
on
microscale,
such
as
microrobotics,
micro-optics,
or
biosensing.
However,
navigating
possible
configurations
selecting
optimal
parameters
process
often
requires
intensive
testing
optimization.
In
addition
to
more
established
acrylate-based
resins,
there
is
growing
interest
in
use
soft
materials.
paper,
we
demonstrate
various
microscale
structures
Nanoscribe
Photonic
Professional
GT+
system.
Furthermore,
describe
system
parameter
selection,
well
resins
their
chemical
mechanical
properties.
Finally,
provide
short
guide
aiming
serve
starting
point
polymerization-based
architectures
distinct
characteristics.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(25)
Published: May 13, 2021
Programmable
actuation
of
metastructures
with
predesigned
geometrical
configurations
has
recently
drawn
significant
attention
in
many
applications,
such
as
smart
structures,
medical
devices,
soft
robotics,
prosthetics,
and
wearable
devices.
Despite
remarkable
progress
this
field,
achieving
wireless
miniaturized
reconfigurable
remains
a
challenge
due
to
the
difficult
nature
fabrication
processes
at
micrometer
scale.
Herein,
microscale
thermo-responsive
metasurfaces
using
stimuli-responsive
liquid
crystal
elastomers
(LCEs)
is
fabricated
an
artificial
muscle
for
reconfiguring
2D
kirigami
structures.
Such
structures
are
via
two-photon
polymerization
sub-micrometer
precision.
Through
rationally
designed
experiments
guided
by
simulations,
optimal
formulation
LCE
explored
relationship
between
shape
transformation
behaviors
parameters
build.
As
proof
concept
demonstration,
constructs
temperature-dependent
switching
information
encryption
applied.
have
potential
boosting
fundamental
small-scale
metastructure
research
design
functional
wearables,
robots
well.
Results in Engineering,
Journal Year:
2021,
Volume and Issue:
11, P. 100257 - 100257
Published: July 27, 2021
Direct
Writing
(DW),
also
known
as
Robocasting,
is
an
extrusion-based
layer-by-layer
manufacturing
technique
suitable
for
complex
geometries.
Different
types
of
materials
such
metals,
composites,
ceramics,
biomaterials,
and
shape
memory
alloys
can
be
used
DW.
The
simplicity
cost-efficiency
DW
makes
it
convenient
different
applications,
from
biomedical
to
optics.
Recent
studies
on
show
a
tendency
towards
the
development
new
applications.
This
represents
necessity
deep
understanding
principles
parameters
each
technique,
material,
process
challenge.
review
highlights
many
techniques,
recent
advancements
in
material
development,
parameters,
challenges
process.
Since
quality
printed
parts
by
highly
depend
extrusion,
focus
this
mainly
ceramic
extrusion
its
rheological
point
view.
delivers
insight
into
processes
overcome
main
objective
deliver
necessary
information
non-specialist
interdisciplinary
researchers.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(22)
Published: April 22, 2021
Abstract
Capillary‐force‐driven
self‐assembly
is
emerging
as
a
significant
approach
for
the
massive
manufacture
of
advanced
materials
with
novel
wetting,
adhesion,
optical,
mechanical,
or
electrical
properties.
However,
academic
value
and
practical
applications
are
greatly
restricted
because
traditional
micropillar
always
unidirectional.
In
this
work,
two‐photon‐lithography‐based
4D
microprinting
introduced
to
realize
reversible
bidirectional
microstructures.
With
asymmetric
crosslinking
densities,
printed
vertical
microstructures
can
switch
curved
state
controlled
thickness,
curvature,
smooth
morphology
that
impossible
replicate
by
3D‐printing
technology.
different
evaporating
solvents,
4D‐printed
experience
three
states:
(I)
coalesce
into
clusters
from
original
states
via
self‐assembly,
(II)
remain
curved,
(III)
arbitrarily
self‐assemble
(4D
self‐assembly)
toward
curving
directions.
Compared
conventional
approaches,
distance‐independent,
which
generate
varieties
assemblies
yield
high
100%.
More
importantly,
be
reversibly
switched,
allowing
development
many
promising
such
micropatterns,
switchable
dynamic
actuation
microrobots,
origami,
encapsulation.
