Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 29, 2024
Abstract
This
work
utilizes
the
self‐assembled
cellulose
nanocrystals
(CNCs)
as
host
chiral
template
and
fabricates
a
circularly
polarized
luminescence
(CPL)
film.
By
manipulating
photonic
bandgap,
synthesized
film
integrates
strong
CPL
signal
superior
mechanical
flexibility.
Without
losing
activity,
ultimate
strain
of
19%
has
exceeded
most
CNC‐based
luminescent
assemblies,
which
enables
them
candidates
in
optical
sensor
wearable
device.
Meanwhile,
humidity‐stimulus
response,
with
dissymmetry
factor
(
g
lum
)
close
to
0.51.
responsive
process
is
reversible
properties
can
recover
upon
drying.
Next,
by
pathway,
this
achieves
on‐demand
direction
control
meets
considerable
intensity
reversed
signals
:
‐0.35),
avoiding
structure
disruption
random
under
external
stimuli,
opens
new
insight
into
regulations.
Furthermore,
combines
situ
growth
strategy
first
synthesizes
dynamic‐switchable
dual‐direction
Optics
both
directions
be
inverted
simultaneously
exchanging
sequences.
Finally,
multimodal
optics,
excellent
stability,
green
manufacturing
make
welcome
advanced
anti‐counterfeit
areas,
features
lossless
long‐time
useful.
Advanced Optical Materials,
Год журнала:
2024,
Номер
12(19)
Опубликована: Март 14, 2024
Abstract
1D
photonic
crystals
(1DPCs)
with
hierarchically
structured
lamellar
periodic
frameworks
that
enable
precise
control
of
light‐matter
interactions
and
contribute
robust
structural
colors
represent
a
groundbreaking
advancement
in
optical
materials.
The
microstructural
characteristics
the
constituent
material
properties
these
materials
play
pivotal
roles
determining
their
performance
functionality.
In
recent
years,
diverse
array
novel
structures
crafted
from
various
emerged,
showcasing
tremendous
potential
advanced
applications.
This
article
provides
an
in‐depth
review
developments
1DPCs,
emphasizing
morphological
designs,
fabrication
strategies,
detail,
1DPCs
featuring
distinct
geometrical
morphologies,
including
lamellar,
helical,
fibrous,
spherical,
nanochained
are
systematically
introduced,
highlighting
unique
arising
microstructures.
Then,
methods,
involving
some
innovative
techniques
utilizing
standing‐wave
optics,
UV
dual
photopolymerization,
inkjet
printing,
succinctly
summarized
for
constructing
different
by
using
building
Subsequently,
typical
application
examples
listed
discussed
visual
sensing,
intelligent
displays,
anti‐counterfeiting
technology,
pigments,
devices.
Finally,
passage
addresses
current
challenges
presents
forward‐looking
perspective
on
future
1DPCs.
Cellulose
nanocrystal
(CNC),
as
a
renewable
resource,
with
excellent
mechanical
performance,
low
thermal
expansion
coefficient,
and
unique
optical
is
becoming
novel
candidate
for
the
development
of
smart
material.
Herein,
recent
progress
CNC-based
chirality
nanomaterials
uncovered,
mainly
covering
structure
regulations
function
design.
Undergoing
simple
evaporation
process,
cellulose
nanorods
can
spontaneously
assemble
into
chiral
nematic
films,
accompanied
by
vivid
structural
color.
Various
film
structure-controlling
strategies,
including
assembly
means,
physical
modulation,
additive
engineering,
surface
modification,
geometric
regulation,
external
field
optimization,
are
summarized
in
this
work.
The
intrinsic
correlation
between
performance
emphasized.
Next,
applications
systematically
reviewed.
Layer-by-layer
stacking
activity
endow
wide
mineralization,
bone
regeneration,
synthesis
mesoporous
materials.
Besides,
color
broadens
functions
anti-counterfeiting
shape-memory
self-healing
Finally,
challenges
proposed.
Advanced Materials,
Год журнала:
2024,
Номер
36(47)
Опубликована: Окт. 6, 2024
Abstract
The
development
of
stimuli‐responsive
and
color‐tunable
chiral
organic
afterglow
materials
has
attracted
great
attention
but
remains
a
daunting
challenge.
Here,
simple
yet
effective
strategy
through
the
construction
dynamic
H‐bonding
network
is
proposed
to
explore
multi‐color
by
doping
self‐designed
phosphorescent
chromophore
into
polyvinyl
alcohol
matrix.
A
deep
blue
system
with
lifetime
up
3.35
s,
quantum
yield
25.0%,
luminescent
dissymmetry
factor
0.05
achieved
reversible
formation
breakdown
upon
thermal‐heating
water‐fumigating.
Moreover,
can
be
obtained
energy
transfer,
allowing
establishment
information
displays
high‐level
4D
encryption.
This
work
not
only
offers
facile
platform
develop
advanced
also
opens
new
avenue
for
developing
next‐generation
optical
technology
enhanced
functionality
responsiveness.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 17, 2024
Abstract
Natural
polymers,
particularly
plant‐derived
nanocelluloses,
self‐organize
into
hierarchical
structures,
enabling
mechanical
robustness,
bright
iridescence,
emission,
and
polarized
light
reflection.
These
biophotonic
properties
are
facilitated
by
the
assembly
of
individual
components
during
evaporation,
such
as
cellulose
nanocrystals
(CNCs),
which
exhibit
a
left‐handed
helical
pitch
in
chiral
nematic
state.
This
work
demonstrates
how
optically
active
films
with
pre‐programmed
opposite
handedness
(left
or
right)
can
be
constructed
via
shear‐induced
twisted
printing
clockwise
counter‐clockwise
shearing
vectors.
The
resulting
large‐area
thin
transparent
yet
pre‐determined
mirror‐symmetrical
optical
activity,
distinction
absorbed
emitted
circularly
light.
processing
method
allows
for
sequential
ultrathin
layered
organization
on‐demand
helicity.
complex
polarization
behavior
is
due
to
step‐like
changes
linear
birefringence
within
each
deposited
layer
circular
birefringence,
different
from
that
conventional
CNC
revealed
Muller
matrix
analysis.
Furthermore,
intercalating
an
achiral
organic
dye
printed
structures
induces
luminescence
while
preserving
high
transmittance
controlled
handedness.
results
suggest
facilitate
construction
chiroptical
metamaterials
tunable
polarization,
absorption,
emission
filters,
encryption,
photonic
coatings,
sensors.
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
12(13), С. 4861 - 4869
Опубликована: Янв. 1, 2024
CPL
active
materials
with
a
tunable
g
lum
-factor,
from
−0.30
to
0.04,
were
fabricated
by
incorporating
responsive
organic
dye
into
cellulose
nanocrystals.
Such
films
showed
dynamic
switchable
signal
in
intensity
and
handedness
at
different
pH.
Advanced Optical Materials,
Год журнала:
2024,
Номер
12(19)
Опубликована: Апрель 30, 2024
Abstract
Functional
materials
that
exhibit
circularly
polarized
luminescence
(CPL)
have
shown
immense
potential
in
applications
such
as
3D
optical
displays
and
advanced
information
encryption.
However,
facile
efficient
regulation
of
the
multiple
emission
properties
chiral
systems
has
remained
a
challenge
due
to
scarcity
suitable
complexity
systems.
Herein,
CPL
platform
is
fabricated
by
helical
co‐assembly
an
aldehyde‐functionalized
fluorane
dye
(Rhodol‐CHO,
6′‐(diethylamino)‐3′‐hydroxy‐3‐oxo‐3H‐spiro[isobenzofuran‐1,9′‐xanthene]‐4′‐carbaldehyde)
liquid
crystals,
which
can
efficiently
combine
stimuli‐responsive
characteristics
high
activity.
By
introducing
acid,
base,
compounds
containing
primary
amino
(─NH
2
)
groups,
property
system
be
easily
modified.
The
obtained
apparent
asymmetry,
with
g
lum
values
reaching
0.54–0.75).
Further,
these
modules
are
successfully
applied
multi‐mode
encryption,
highlighting
their
practical
utility.
Therefore,
this
study
presents
novel
strategy
for
developing
diverse
behaviors
based
on
simple‐designed
platform,
advancing
further
materials.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(32), С. 41743 - 41765
Опубликована: Авг. 5, 2024
The
proliferation
of
misleading
information
and
counterfeit
products
in
conjunction
with
technical
progress
presents
substantial
worldwide
issues.
To
address
the
issue
counterfeiting,
many
tactics,
such
as
use
luminous
anticounterfeiting
systems,
have
been
investigated.
Nevertheless,
traditional
fluorescent
compounds
a
restricted
effectiveness.
Cellulose
nanocrystals
(CNCs),
known
for
their
renewable
nature
outstanding
qualities,
present
an
excellent
opportunity
to
develop
intelligent,
optically
active
materials
formed
due
self-assembly
behavior
stimuli
response.
CNCs
derivatives-based
self-assemblies
allow
creation
adaptable
that
may
be
used
prevent
counterfeiting.
These
integrate
photophysical
characteristics
components
stimuli-responsive
behavior,
enabling
fibers,
labels,
films,
hydrogels,
inks.
Despite
attention,
existing
frequently
fall
short
practical
criteria
limited
knowledge
poor
performance
comparisons.
This
review
aims
provide
on
latest
developments
anticounterfeit
based
derivatives.
It
also
includes
scope
artificial
intelligence
(AI)
near
future.
will
emphasize
potential
uses
these
encourage
future
investigation
this
rapidly
growing
area
study.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(22)
Опубликована: Март 25, 2024
Abstract
Endowing
perovskite
quantum
dots
(PQDs)
with
circularly
polarized
luminescence
(CPL)
offers
great
promise
for
innovative
chiroptical
applications,
but
the
existing
strategies
are
inefficient
in
acquiring
stimuli‐responsive
flexible
chiral
films
large,
tunable
dissymmetry
factor
(
g
lum
)
and
long‐term
stability.
Here,
we
report
a
strategy
design
synthesis
of
luminescent
cholesteric
liquid
crystal
elastomer
(Lumin‐CLCE)
mechanically
CPL,
which
is
enabled
by
crystal‐templated
self‐assembly
situ
covalent
cross‐linking
judiciously
designed
photopolymerizable
CsPbX
3
(X=Cl,
Br,
I)
PQD
nanomonomers
into
elastic
polymer
networks.
The
resulting
Lumin‐CLCE
showcase
structural
color
natural
light
noticeable
CPL
maximum
value
up
to
1.5
under
UV
light.
manipulation
intensity
rotation
direction
achieved
controlling
self‐assembled
helicoidal
nanostructure
handedness
soft
helices.
A
significant
breakthrough
lies
achievement
reversible,
perovskite‐based
switch
activated
biaxial
stretching,
enables
flexible,
dynamic
anti‐counterfeiting
labels
capable
decrypting
preset
information
specific
polarization
states.
This
work
can
provide
new
insights
development
advanced
materials
their
emerging
applications
encryption,
3D
displays,
beyond.
