Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 18, 2024
Abstract
In
nature,
many
organisms
augment
chances
of
survival
by
reprogramming
their
structures
to
evolving
environment,
among
which
sea
squirts
being
a
prime
example.
Such
has
been
demonstrated
in
liquid
crystal
elastomer
(LCE)
actuator
assembled
with
heat
assistance.
However,
the
required
temperature
higher
than
actuation
limits
its
application.
Here,
we
reported
hydrogen‐bonded
supramolecular
network
LCE
construct
soft
modular
and
reprogrammable
assembling
gentle
treatment.
Leveraging
Michael
addition
reaction,
introduced
hydrogen
bonding
matrix
functionalized
pyridine
monomers.
Experimental
molecular
dynamics
modeling
proved
efficient
dynamic
bond
exchange
at
60
°C,
significantly
lower
actuating
LCE.
This
gave
rise
reversible
robust
adhesion
same
collection
modules
capable
built
into
different
bilayers
performing
various
morphing
upon
short
thermal
stimulation.
Therefore,
that
these
comparatively
weak
cross‐links
enabled
reconfiguration
actuator.
With
developed
hydrogen‐bonding
LCEs,
proof‐of‐concept
robot,
crawling,
sailing,
microcircuit
repair
tasks.
bioinspired
method
for
evolutionary
robot
offers
viable
path
further
development
intelligent
actuators
sustainable
complex
environments.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 12, 2024
Abstract
Smart
surfaces,
distinguished
by
their
dynamic
responses
to
environmental
changes,
may
enhance
the
functionality,
interactivity,
and
efficiency
of
materials
devices.
Liquid
crystal
elastomers
(LCEs)
are
ideal
candidates
for
creating
smart
allowing
reversible
topographical
changes
in
response
stimuli.
However,
traditional
thermoset
LCE
preparation
methods
require
complex
manufacturing
processes,
including
photopolymerization,
resulting
surfaces
(often
pillars)
nonreprogrammable
nonrecyclable.
In
this
work,
hot
embossing
is
used
combination
with
a
thermoplastic
self‐healing
reprogrammable
exotic
capable
reversibly
responding
stimuli,
significantly
simplifying
fabrication.
It
demonstrated
that
can
be
effectively
applied
fabricate
arrays
pillars,
cones,
tubes,
or
mushroom
shapes.
The
surface
structures
exhibit
programmable
shape
heat
erased
rewritten
alternate
topographies.
As
an
additional
feature,
recycled
reused
create
photo‐responsive
topographies
spatiotemporally
addressed
light.
Light‐responsive
prepared
incorporating
photothermal
dye
without
loss
reconfigurability.
Demonstrators
fabricated
such
as
locally
controlled
object
movement
on
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(31)
Published: Aug. 6, 2024
Abstract
Manipulable
lenses
with
tunable
focal
length
have
garnered
great
attention
due
to
their
unique
advantages
including
strong
adjustability,
low
power
consumption,
fast
response
times,
and
ease
of
integration.
However,
in
the
context
advancing
intellectualization,
weight
reduction,
miniaturization
imaging
systems,
mere
adjustment
is
no
longer
sufficient.
Herein,
an
innovative
method
introduced
for
creating
a
dynamic
light
manipulable
(DLM)
lens
surface
reshaping.
This
breakthrough
accomplished
through
collaborative
integration
medium
actuator
based
on
photo‐active
liquid
crystal
polymer
(LCP)
film,
where
deformation
LCP
film
can
be
arbitrarily
controlled
by
meticulously
designing
orientation
distributions
(LC)
mesogens
within
film.
The
three
distinct
surfaces,
quasi‐cone,
paraboloid,
3
×
paraboloid
array,
are
demonstrated
infrared
stability,
robust
fatigue
resistance,
long
natural
recovery
time,
outstanding
thermal
excellent
solvent
further
confirming
feasibility
application
display,
imaging,
optics,
other
systems.
work
holds
promise
paving
way
new
generation
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(49)
Published: Aug. 20, 2024
Abstract
Responsive
photonic
crystals
(RPCs)
exhibit
dynamic
chromism
upon
trigger
by
various
solvents,
showing
potential
applications
in
qualitative
identification
and
quantitative
analysis
of
multicomponent
solvents.
However,
distinguishing
similar
especially
traces
cosolvents,
remains
challenging
due
to
the
limited
sensitivity
RPCs.
To
address
this,
we
herein
introduce
brush‐like
polymeric
gels
inside
crystals,
forming
a
gel
(BPPG)
that
can
trace
tiny
component
changes.
In
this
BPPG
system,
acrylate
backbones
polyethylene
glycol
(PEG)
side‐chains
stretch
incrementally
cosolvency
ethanol‐water
mixtures,
resulting
highly
sensitive
chromatic
responses
within
ethanol‐rich
concentrations.
With
water
content
varying
slightly
from
0
1
vol
%,
reflection
wavelength
sharply
redshift
over
30
nm,
leading
very
noticeable
changes
structural
color.
This
enhanced
makes
suitable
for
real‐time,
situ
purity
monitoring
absolute
ethanol
during
storage,
transportation,
other
applications.
Aggregate,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 2, 2024
Abstract
The
design
and
fabrication
of
advanced
soft
actuators
with
programmable
actuation
are
highly
desirable
in
constructing
intelligent
robots.
In
this
work,
a
light‐driven
liquid
crystalline
network
(LCN)‐based
actuator
was
judiciously
designed
prepared
by
structural
anisotropy
across
the
thickness
film.
A
three‐dimensional
(3D)
deformable
LCN
realized
polymerization‐induced
phase
separation
small‐molar‐weight
monomers
polymer
networks.
resultant
anisotropic
displays
microscale
nanoporous
architecture
addition
to
uniform
alignment
at
molecular
scale.
behaviors
film
tunable
adjusting
size
distribution
nanopores
bulk
via
changing
polymerization
conditions
monomer
components.
More
importantly,
can
be
harnessed
as
promising
template
achieve
diverse
light
responsiveness
photothermal
dyes
feasible
washing
refilling
process,
demonstrating
reprogrammable
actuator.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 18, 2024
Abstract
In
nature,
many
organisms
augment
chances
of
survival
by
reprogramming
their
structures
to
evolving
environment,
among
which
sea
squirts
being
a
prime
example.
Such
has
been
demonstrated
in
liquid
crystal
elastomer
(LCE)
actuator
assembled
with
heat
assistance.
However,
the
required
temperature
higher
than
actuation
limits
its
application.
Here,
we
reported
hydrogen‐bonded
supramolecular
network
LCE
construct
soft
modular
and
reprogrammable
assembling
gentle
treatment.
Leveraging
Michael
addition
reaction,
introduced
hydrogen
bonding
matrix
functionalized
pyridine
monomers.
Experimental
molecular
dynamics
modeling
proved
efficient
dynamic
bond
exchange
at
60
°C,
significantly
lower
actuating
LCE.
This
gave
rise
reversible
robust
adhesion
same
collection
modules
capable
built
into
different
bilayers
performing
various
morphing
upon
short
thermal
stimulation.
Therefore,
that
these
comparatively
weak
cross‐links
enabled
reconfiguration
actuator.
With
developed
hydrogen‐bonding
LCEs,
proof‐of‐concept
robot,
crawling,
sailing,
microcircuit
repair
tasks.
bioinspired
method
for
evolutionary
robot
offers
viable
path
further
development
intelligent
actuators
sustainable
complex
environments.
