Abstract
Natural
molecular
machines
have
inspired
the
development
of
artificial
machines,
which
potential
to
revolutionize
several
areas
technology.
Artificial
commonly
employ
switches,
motors,
and
shuttles
as
fundamental
building
blocks.
The
observation
constructed
by
these
blocks
can
be
highly
challenging
due
their
small
sizes
intricate
behaviors.
use
modern
instrumentation
advanced
observational
techniques
plays
a
crucial
role
in
characterization
machines.
Furthermore,
well‐designed
structure
is
also
critical
factor
making
more
observable.
This
review
summarizes
common
methods
from
diverse
perspectives
used
observe
emphasizes
significance
comprehending
behaviors
design
superior
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(48)
Опубликована: Авг. 31, 2023
The
development
of
chiral
optical
active
materials
with
switchable
circularly
polarized
luminescence
(CPL)
signals
remains
a
challenge.
Here
an
azoarene-based
molecular
switch,
(S,
R,
S)-switch
1
and
(R,
R)-switch
2,
are
designed
prepared
(R)-binaphthyl
azo
group
as
photosensitive
moiety
two
(S)-
or
fluorescent
molecules
opposite
the
same
handedness
moieties.
Both
switches
exhibit
reversible
trans/cis
isomerization
when
irradiated
by
365
nm
UV
light
520
green
in
solvent
liquid
crystal
(LC)
media.
In
contrast
control
switch
is
doped
into
nematic
LCs,
polarization
inversion
switching-off
CPL
achieved
resultant
helical
superstructure
upon
irradiation
light,
respectively.
Meanwhile,
fluorescence
intensity
system
basically
unchanged
during
this
switching
process.
particular,
these
variations
could
be
recovered
after
heating,
realizing
true
sense
switching.
Taking
advantage
unique
switching,
proof-of-concept
for
"a
dual-optical
information
encryption
system"
based
on
above
material
demonstrated.
Advanced Materials,
Год журнала:
2023,
Номер
36(7)
Опубликована: Авг. 26, 2023
Abstract
Long‐lived
room‐temperature
phosphorescence
(RTP)
of
organic
materials
holds
a
significant
potential
for
optical
information.
Circularly
polarized
ultralong
(CP‐OURTP)
with
extremely
high
dissymmetry
factor
(
g
lum
)
values
is
even
highly
demanded
and
considerably
challenging.
Here,
an
effective
strategy
introduced
to
realize
CP‐OURTP
emission
decay
time
735
ms
value
up
1.49,
which
exceeds
two
orders
magnitude
larger
than
previous
records,
through
system
composed
RTP
polymers
chiral
helical
superstructures.
The
exhibits
excellent
stability
under
multiple
cycles
photoirradiation
thermal
treatment,
further
employed
information
encryption
based
on
multiplexing.
results
are
anticipated
lay
the
foundation
development
in
advanced
photonic
applications.
Light Science & Applications,
Год журнала:
2024,
Номер
13(1)
Опубликована: Июнь 14, 2024
Abstract
Polymer-based
circularly
polarized
luminescence
(CPL)
materials
with
the
advantage
of
diversified
structure,
easy
fabrication,
high
thermal
stability,
and
tunable
properties
have
garnered
considerable
attention.
However,
adequate
precise
tuning
over
CPL
in
polymer-based
remains
challenging
due
to
difficulty
regulating
chiral
structures.
Herein,
visualized
full-color
is
achieved
by
doping
red,
green,
blue
quantum
dots
(QDs)
into
reconfigurable
phase
liquid
crystal
elastomers
(BPLCEs).
In
contrast
signal
observed
cholesteric
(CLCEs),
3D
cubic
superstructure
BPLCEs
induces
an
opposite
signal.
Notably,
this
effect
entirely
independent
photonic
bandgaps
(PBGs)
results
a
g
lum
value,
even
without
matching
between
PBGs
emission
bands
QDs.
Meanwhile,
lattice
structure
can
be
reversibly
switched
via
mechanical
stretching
force,
inducing
on-off
switching
signals,
these
variations
further
fixed
using
dynamic
disulfide
bonds
BPLCEs.
Moreover,
smart
systems
for
anti-counterfeiting
information
encryption
been
demonstrated,
suggesting
great
potential
BPLCEs-based
active
materials.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(12)
Опубликована: Янв. 24, 2024
Abstract
Achieving
circularly
polarized
organic
ultralong
room‐temperature
phosphorescence
(CP‐OURTP)
with
a
high
luminescent
dissymmetry
factor
(g
lum
)
is
crucial
for
diverse
optoelectronic
applications.
In
particular,
dynamically
controlling
the
of
CP‐OURTP
can
profoundly
advance
these
applications,
but
it
still
unprecedented.
This
study
introduces
an
effective
strategy
to
achieve
photoirradiation‐driven
chirality
regulation
in
bilayered
structure
film,
which
consists
layer
soft
helical
superstructure
incorporated
light‐driven
molecular
motor
and
phosphorescent
(RTP)
polymer.
The
prepared
film
exhibits
emission
lifetime
805
ms
g
value
up
1.38.
Remarkably,
resulting
be
reversibly
controlled
between
0.6
1.38
over
20
cycles
by
light
irradiation,
representing
first
example
CP‐OURTP.
Abstract
For
centuries,
humans
have
never
stopped
exploring
the
nature
of
light
and
manipulating
it,
since
carries
multiple
information
through
its
intrinsic
wave‐particle
dualism,
including
wavelength,
amplitude,
phase,
polarization,
spin/orbital
angular
momentum,
etc.,
which
determines
physical
language
basic
manners
we
perceive
objective
world.
Conventional
optical
devices,
such
as
lenses,
prisms,
lasers,
are
composed
solid
elements
that
bulky,
making
it
difficult
to
manipulate
dynamically
with
degrees‐of‐freedom.
Comparatively,
some
responsive
soft
matters,
especially
represented
by
liquid
crystals
(LCs),
possess
distinctive
orientational
order
spontaneous
self‐assembled
superstructures,
enabling
digital
programming
microstructures
degrees‐of‐freedom
manipulation
their
characteristics.
The
based
on
these
is,
“soft‐matter‐photonics”,
is
playing
an
impressive
role
in
integrated
functional
present
age
explosion.
Herein,
review
latest
advances,
respectively,
microstructure
configurations,
manipulations,
relevant
prospective
applications.
Additionally,
scientific
issues
technical
challenges
hinder
programing
operation
manipulations
discussed.
Toward
a
four‐dimensional
condensed
matter,
this
may
wide
implications
variety
applications,
fabrication
compact
elements,
multi‐channel
processing
high‐capacity
communications.
Advanced Materials,
Год журнала:
2024,
Номер
36(16)
Опубликована: Янв. 12, 2024
Stimuli-responsive
circularly
polarized
luminescence
(CPL)
materials
show
great
promise
in
applying
information
encryption
and
anticounterfeiting.
Herein,
light-driven
CPL
sign
inversion
is
achieved
by
combining
a
photoresponsive
achiral
negative
dichroic
dye
(KG)
static
positive
(NR)
as
dopants
at
the
0.5:0.5
weight
ratio
into
cholesteric
liquid
crystal
(CLC)
host.
The
side
chains
of
KG
undergo
trans/cis
isomerization
after
365
nm
UV
light
irradiation,
leading
to
dichroism
(S
Abstract
Commodity
fraud
poses
significant
economic
and
public
health
risks
while
jeopardizing
market
stability.
A
promising
avenue
for
addressing
this
issue
involves
the
incorporation
of
physical
unclonable
function
(PUF)
in
anti‐counterfeiting
labels
commodity
authentication
purposes.
PUFs
are
a
large
number
unbreakable
security
generated
through
random
process,
which
exhibit
unique
pattern
responses
that
impervious
to
replication.
In
particular,
novel
kind
PUF
model,
called
structural
color‐based
PUFs,
combing
color
characteristics
angle‐dependent
stability
brightness
with
property,
offers
unassailable
encryption
capabilities
serves
as
formidable
safeguard
against
forgery.
This
review
undertakes
comprehensive
summary
recent
advancements
technology
leveraging
materials.
Moreover,
it
provides
systematic
description
recognition
employed
optical
PUFs.
Finally,
prospective
outlook
is
proposed
explain
existing
challenges,
highlight
potential
developments
incorporating
labels.
Abstract
Liquid
crystal
polymers
(LCPs)
have
gained
tremendous
attention
in
recent
years
due
to
their
great
potentials
from
fabrication
of
responsive
actuators
and
sensors
construction
intelligent
soft
robotic
light
modulators.
However,
conventional
LCPs
with
permanent
cross‐links
present
tedious
unmodifiable
stimuli‐responsiveness.
Recently,
dynamic
bonds
capable
reversibly
break
reform
been
integrated
into
LCP,
imparting
intrinsic
characteristics.
The
LCP
possesses
unprecedented
diverse
functionalities
including
reprogrammability,
recyclability,
self‐healing
ability,
becoming
much
more
adaptive
surrounding
environmental
changes
compared
the
counterpart.
In
this
review,
progress
bond‐based
is
summarized.
mechanism,
preparation,
based
on
noncovalent
bond
(DNCB)
covalent
(DCB)
are
poised
be
discussed,
followed
by
introducing
emergent
combining
both
DNCB
DCB.
Consequently,
unique
will
given.
Finally,
outlooks
development
presented.
Abstract
Smart
chiral
liquid
crystal
elastomers
are
a
class
of
soft
photonic
crystals
with
periodic
nanostructures.
There
two
kinds
structural
colors:
cholesteric
one‐dimensional
helical
nanostructure
and
blue‐phase
three‐dimensional
nanostructure.
The
self‐assembled
can
be
dynamically
controlled
under
external
stimulation,
the
reflected
color
adjusted
throughout
visible
light
range.
Along
development
innovative
material
systems
cutting‐edge
manufacturing
technologies,
researchers
have
proposed
diverse
strategies
to
design
synthesize
thoroughly
investigated
their
properties
potential
applications.
Here,
we
provide
systematic
review
progress
in
fabrication
smart
elastomers,
focusing
on
via
surface‐enforced
alignment,
bar
coating,
3D
printing,
anisotropic
deswelling
methods
as
well
self‐assembly
without
additional
alignment.
able
respond
quickly
stimuli
wide
range
applications
areas
such
adaptive
optics,
color‐changing
camouflage,
robotics,
information
encryption.
This
concludes
perspective
opportunities
challenges
for
future
elastomers.
Light Science & Applications,
Год журнала:
2023,
Номер
12(1)
Опубликована: Окт. 3, 2023
The
increased
prevalence
of
the
Internet
Things
(IoT)
and
integration
digital
technology
into
our
daily
lives
have
given
rise
to
heightened
security
risks
need
for
more
robust
measures.
In
response
these
challenges,
physical
unclonable
functions
(PUFs)
emerged
as
promising
solution,
offering
a
highly
secure
method
generate
unpredictable
unique
random
values
by
leveraging
inherent
characteristics.
However,
traditional
PUFs
implementations
often
require
complex
hardware
circuitry,
which
can
add
cost
complexity
system.
We
present
novel
approach
using
wrinkles
PUF
(rw-PUF)
based
on
an
optically
anisotropic,
facile,
simple,
cost-effective
material.
These
contain
randomly
oriented
liquid
crystal
molecules,
resulting
in
two-dimensional
retardation
map
corresponding
birefringence
pattern.
Additionally,
proposed
technique
allows
customization
specific
requirements
spatial
light
modulator,
enabling
fast
fabrication.
has
capability
store
multiple
data
sets
within
single
without
alterations.
Furthermore,
we
introduce
concept
called
'polyhedron
authentication,'
utilizes
three-dimensional
information
storage
voxelated
PUF.
This
demonstrates
feasibility
implementing
high-level
properties
rw-PUF.
