Applied Sciences,
Journal Year:
2022,
Volume and Issue:
12(21), P. 10708 - 10708
Published: Oct. 22, 2022
A
method
to
determine
the
power
of
a
continuous
wave
laser
from
photothermal
heating
poly(dimethyl
siloxane)
film
is
reported.
The
base
was
doped
with
oil
red
O
and
cured
on
surface
relief
grating.
grating
period
shown
increase
proportional
temperature
by
monitoring
decrease
in
diffraction
angle
probe
beam.
10s
illumination
(CW)
pump
beam
absorbed
increased
film’s
temperature,
which
resulted
local
strain
that
could
be
modeled
using
two-dimensional
heat
kernel.
amplitude
transient
response
found
linearly
correlated
power.
Macromolecular Materials and Engineering,
Journal Year:
2021,
Volume and Issue:
307(3)
Published: Dec. 16, 2021
Abstract
Light
induced
soft
actuators
have
broad
application
prospects
where
non‐contact
stimulation
and
remote
control
are
required.
However,
such
cannot
achieve
uniform
contraction
easily
due
to
the
weak
penetration
of
light.
Here,
with
aid
vertical
distribution
Sm
2
O
3
,
Yb
Nd
as
selectively
photothermal
fillers
along
film
thickness,
a
near‐infrared
(NIR)
light
(1064,
980,
808
nm)
actuator
based
on
shape‐memory
polymer
composites,
which
has
large
thickness
up
mm
is
reported.
The
results
show
that
tri‐layer
films
present
could
lift
weight
101.44
g
by
8
under
simultaneous
irradiations
three
NIR
beams.
It
believed
provides
new
strategy
create
can
shape
reconfiguration
high
pulling
force,
further
filling
gap
between
material
concept
engineering
applications.
2022 IEEE 35th International Conference on Micro Electro Mechanical Systems Conference (MEMS),
Journal Year:
2022,
Volume and Issue:
unknown, P. 628 - 631
Published: Jan. 9, 2022
This
work
presents
a
miniaturized
soft
crawler
inspired
by
the
rectilinear
locomotion
of
snakes.
The
proposed
consists
two
claw-like
legs
and
an
arched
actuator
connecting
legs.
crawler,
which
comprises
liquid
crystal
elastomer
(LCE),
was
fabricated
monolithically
using
lithography-based
molding
process.
A
photothermal
thin-film
(PTF)
dispersed
with
metal
nanoparticles
is
deposited
on
for
inducing
actuation.
experiment
results
show
that
PTF
sufficient
to
trigger
LCE
actuation
under
NIR
illumination,
introducing
into
effectively
reduces
thermal
time
constants
33%.
periodic
excitations
also
successfully
demonstrated.
Angewandte Chemie,
Journal Year:
2022,
Volume and Issue:
134(11)
Published: Jan. 13, 2022
Abstract
Diarylethene‐functionalized
liquid‐crystalline
elastomers
(DAE‐LCEs)
containing
thiol‐anhydride
bonds
were
prepared
and
shown
to
undergo
reversible,
reprogrammable
photoinduced
actuation.
Upon
exposure
UV
light,
a
monodomain
DAE‐LCE
generated
5.5
%
strain.
This
photogenerated
strain
was
demonstrated
be
optically
reversible
over
five
cycles
of
alternating
UV/Visible
light
with
minimal
photochrome
fatigue.
The
incorporation
dynamic
allowed
for
retention
actuated
states.
Further,
re‐programming
the
nematic
director
achieved
by
heating
above
temperature
bond
exchange
occur
(70
°C)
yet
below
nematic‐to‐isotropic
transition
(100
such
that
order
maintained
between
mesogens.
observed
thermal
stability
each
diarylethene
isomers
72
h
decoupling
photo‐induced
processes
polymer
network
effects,
showing
both
relaxation
back‐isomerization
contributed
LCE
period
12
hours
after
actuation
unless
occurred.
Applied Sciences,
Journal Year:
2022,
Volume and Issue:
12(21), P. 10708 - 10708
Published: Oct. 22, 2022
A
method
to
determine
the
power
of
a
continuous
wave
laser
from
photothermal
heating
poly(dimethyl
siloxane)
film
is
reported.
The
base
was
doped
with
oil
red
O
and
cured
on
surface
relief
grating.
grating
period
shown
increase
proportional
temperature
by
monitoring
decrease
in
diffraction
angle
probe
beam.
10s
illumination
(CW)
pump
beam
absorbed
increased
film’s
temperature,
which
resulted
local
strain
that
could
be
modeled
using
two-dimensional
heat
kernel.
amplitude
transient
response
found
linearly
correlated
power.
