ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(29), P. 35302 - 35310
Published: July 12, 2023
The
planar
state
of
a
cholesteric
liquid
crystal
(CLC)
often
exhibits
oily
streak
defects,
which
negatively
impact
the
characteristics
precision
optics,
including
transmission
and
selective
reflection.
In
this
paper,
we
introduced
polymerizable
monomers
into
crystals
examined
effects
monomer
concentration,
polymerization
light
intensity,
chiral
dopant
concentration
on
defects
in
CLC.
With
proposed
method
heating
to
isotropic
phase
followed
by
rapid
cooling,
oil
presented
can
be
successfully
eliminated.
Furthermore,
stable
focal
conic
obtained
slow
cooling
process.
Two
states
with
different
optical
properties
based
at
rates,
makes
it
possible
detect
whether
stored
procedure
temperature-sensitive
material
is
qualified.
These
findings
have
widespread
applications
devices
that
require
without
detection
devices.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(8), P. 4045 - 4085
Published: Jan. 1, 2024
Self-indicating
polymers
undergo
detectable
variations
in
response
to
stimuli.
Important
mechanisms
of
self-indication
are
aggregation,
phase
transition,
covalent
and
non-covalent
bond
cleavage,
isomerization,
charge
transfer,
energy
transfer.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(16)
Published: Feb. 13, 2024
Abstract
Improving
the
photoswitching
rate
and
robustness
of
photochromic
molecules
in
bulk
solids
is
paramount
for
practical
applications
but
remains
an
on‐going
challenge.
Here,
we
introduce
octupolar
design
paradigm
to
develop
a
new
family
visible
light
organic
photoswitches,
namely
multi‐branched
Stenhouse
Adducts
(MOPSAs)
featuring
C
3
‐symmetrical
A
‐(D‐core)
architecture
with
dipolar
donor–acceptor
(D–A)
photochrome
each
branch.
Our
couples
multi‐dimensional
geometric
electronic
effects
MOPSAs
enable
robust
ultrafast
reversible
polymers.
Specifically,
optimal
MOPSA
(4
wt
%)
commercial
polyurethane
films
accomplishes
nearly
100
%
discoloration
6
s
under
∼
thermal‐recovery
17.4
at
60
°C,
while
acquired
kinetics
constants
are
3∼7
times
that
DASA
counterpart
1∼2
orders
magnitude
higher
than
those
reported
DASAs
Importantly,
MOPSA‐doped
polymer
sustain
500
discoloration/recovery
cycles
slow
degradation,
superior
existing
polymers
(≤30
cycles).
We
discover
multi‐dipolar
coupling
enables
enhanced
polarization
electron
delocalization,
promoting
rate‐determining
thermal
cyclization,
branched
non‐planar
geometry
induces
large
free
volume
facilitate
isomerization.
This
can
be
extended
spiropyran
or
azobenzene‐based
films.
The
performance
together
their
high‐yield
scalable
synthesis
facile
film
processing
inspires
us
explore
versatile
uses
as
smart
inks
labels
time‐temperature
indicators,
optical
logic
encryption
multi‐levelled
data
encryption.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(44)
Published: May 28, 2024
Abstract
Photonic‐ionic
skins
(PI‐skins)
featuring
multi‐signal
synergistic
outputs
exhibit
fascinating
interactive
sensing
potential
in
flexible
iononics.
However,
the
existing
ones
are
susceptible
to
irreversible
damage
usage
due
their
poor
toughness
and
deficiency
self‐healing.
Herein,
a
novel
tough
mechanochromic
PI‐skin
is
ingeniously
constructed,
from
both
molecular
engineering
nanostructural
perspectives,
via
integrating
ordered
photonic
array
robust
metal‐imidazole
cross‐linked
network.
The
displays
synchronous
structural
color
variation
sensitive
electrical
response
under
strain.
Notably,
synergy
of
dense
physical
cross‐linking
network
microphase‐separation
structure
achieved
by
strong
coordination
greatly
promotes
energy
dissipation.
possesses
combination
exceptional
properties,
including
high
fracture
strength
(8.22
MPa),
remarkable
(10.23
MJ
m
−3
),
adhesion
behavior
(2.30
MPa).
Furthermore,
favorable
self‐healing
capability
at
room
temperature
realized
thanks
dynamic
topological
rearrangement
coordination.
demonstrates
promising
uses
as
visually
wearable
device
for
human
motion
monitoring
remote
communication.
This
work
not
only
broadens
design
considerations
development
high‐performance
artificial
but
also
offers
general
optical
platform
high‐level
devices.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 6, 2025
Optical
multiplexing
technologies,
which
integrate
multiple
optical
channels
based
on
photonic
structures,
offer
a
significant
solution
for
high-capacity
information
storage
and
advanced
encryption.
However,
these
materials
are
limited
by
their
inherent
unswitchable
chiral
result
in
restricted
control
over
the
spatial
distribution
of
light.
Here,
we
propose
to
construct
an
integrating
optical-multiplexed
structure
using
tunable
1D
crystals
orientation
texture
via
combined
self-assembly
shear-aligning
approach.
In
this
system,
created
diverse
ethyl
cellulose
(EC)
offers
wide
range
light
modulations
through
phase
retardation.
When
with
chromatic
layer
formed
EC,
wavelength
polarization
achieved.
Notably,
due
identical
components
modulation
crystal
layers,
traceless
interface
between
them
ensures
both
high
confidentiality
durability.
By
leveraging
hierarchical
slices
well-defined
states
structural
colors
created,
enabling
construction
platform
multiplexed
multichannel
3D
4D
This
study
presents
promising
strategy
develop
traceless,
highly
confidential
units
controllable
color
encryption
technologies.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(17)
Published: Feb. 26, 2024
Effective
monitoring
of
the
time-temperature
history
biological
reagents,
chemical
drugs,
and
perishable
foods
during
cold
chain
storage
is
crucial
for
ensuring
their
quality
efficacy.
Time-temperature
indicators
(TTIs)
are
developed
to
assess
cumulative
impact
time
temperature
on
product
quality.
However,
current
face
challenges
related
complex
wrapping
procedures,
narrow
tracking
ranges,
susceptibility
photobleaching,
pre-use
instability,
hampering
widespread
use.
Herein,
first
moisture-responsive
1D
photonic
crystal
(1DPC)
TTIs
featuring
robust
structural
colors,
customizable
reliable
renewability
demonstrated.
The
exhibit
distinct
color-changing
responsiveness
toward
water
vapor,
which
remains
observable
after
prolonged
at
low
temperatures.
Significantly,
moisture
gradually
diminishes
elevated
temperatures
over
due
ambient
water-induced
hydrogen
bond
formation,
effectively
shielding
indicator
from
external
stimuli.
This
property
enables
naked-eye
inspection
efficacy
storage.
Additionally,
endowed
flexibility
TTI
facilitates
its
easy
attachment
targets,
functioning
as
a
convenient
label.
Remarkably,
can
be
stably
stored
an
extended
period
room
before
use,
thereby
showcasing
substantial
market
potential.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 5, 2024
Abstract
Organisms
possess
remarkably
adaptive
ability
to
complex
environments.
For
example,
chameleons
can
alter
their
skin
color
adapt
varying
environments,
which
has
inspired
significant
advances
in
bioinspired
soft
electronic
skins
(E‐skins),
and
wide
applications
wearable
sensors,
intelligent
robots,
health
monitoring.
However,
current
E‐skins
face
challenges
ultra‐stretchability,
high
sensitivity,
long‐term
stability
owing
the
intrinsic
limitations
associated
with
mismatched
interface
between
matrix
hard
conductive
fillers,
hindering
practical
applications.
Here,
it
is
reported
that
structural
(SC
E‐skins)
consist
of
liquid
metal
particles
(LMPs),
periodical
ordered
colloidal
crystal
arrays,
ultra‐stretchable
hydrogel,
imparting
synergistic
durable
electrical–optical
sensing
capabilities.
Such
SC
demonstrate
outstanding
performances
including
superior
flexibility
(elongation
at
break
>
1100%),
sensitivity
(gauge
factor
=
3.26),
fast
synergetic
electric–optical
response
time
(≈100
ms),
durability
(over
1500
cycles),
accuracy
(R
2
99.5%).
These
excellent
capability
converting
mechanical
signals
into
outputs
hold
great
promise
for
smart
devices,
affording
a
new
horizon
developing
advanced
monitoring
technologies.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(51), P. 28191 - 28203
Published: Dec. 13, 2023
We
demonstrate
the
effective
establishment
of
long-range
electrostatic
interactions
among
colloidal
silica
nanospheres
through
acid
treatment,
enabling
their
assembly
into
crystals
at
remarkably
low
concentrations.
This
novel
method
overcomes
conventional
limitation
in
by
removing
entrapped
NH4+
ions
and
enhancing
electrical
double
layer
(EDL)
thickness,
offering
a
time-efficient
alternative
to
increase
compared
with
methods
like
dialysis.
The
increased
EDL
thickness
facilitates
SiO2
body-centered-cubic
lattice
structure
particle
concentrations,
allowing
for
broad
spectrum
tunability
high
tolerance
size
polydispersity.
Further,
we
uncover
disorder-order
transition
during
crystallization
optimal
concentration
crystal
formation
governed
both
thermodynamic
kinetic
factors.
work
not
only
provides
insights
mechanisms
but
also
paves
way
design
functionalization
silica-based
photonic
diverse
applications.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 19, 2024
Abstract
Blue
phase
liquid
crystals
(BPLCs)
have
exhibited
promising
applications
in
3D
flexible
displays
due
to
their
molecular‐level
self‐assembled
chiral
structures,
fast
response,
and
tunable
polarized
colors.
However,
there
remain
challenges
for
spatiotemporal
programming
of
color
units
BPLC
dynamic
patterning.
Herein,
the
programmable
temporal
evolution
micrometer‐scale
spatial
configuration
switch
modes
are
achieved
by
spontaneous
ink
diffusion‐driven
asymmetric
lattice
deformation
dual‐chiral
polymer‐templated
blue
phases.
Custom‐printed
colorful
patterns
designed
machine
learning‐assisted
parameter
optimization,
which
multidimensional
encrypted
information
that
incorporates
evolving
colors
(wavelength),
distribution
(depth),
(L/R).
The
quantitative
relationship
between
diffusion
kinetics
blue‐phase
structural
optics
is
established
situ
characterization,
finite
element
analysis,
mathematical
geometry
modeling.
This
work
provides
insights
into
microgeometric
manipulation
BPLCs
application
security
self‐adaptive
indicators.
