ACS Sustainable Chemistry & Engineering,
Journal Year:
2022,
Volume and Issue:
10(32), P. 10641 - 10648
Published: Aug. 3, 2022
Bioinspired
coloration
of
cellulose
nanocrystals
(CNCs)
has
advanced
a
new
era
wide
applications
for
decoration,
sensing,
and
anti-counterfeiting.
However,
the
solid
structural
color
films
suffer
from
strong
angle-dependent
iridescence
limited
range
due
to
spatial
arrangement
caused
by
kinetic
arrest
during
evaporation-induced
self-assembly
CNCs.
Here,
ternary
co-assembly
approach
is
demonstrated
prepare
CNC
with
weak/non-angular
optical
response
wide-range
colors.
Structural
enabled
long-range
short-range
ordered
photonic
structure
A
cationic
polymer,
poly(dimethyl
diallyl
ammonium
chloride),
introduced
influence
through
electrostatic
attraction,
inducing
transition
disordered/short-range
as
well
presenting
gradual
change
iridescent
colors
non-iridescent
Additionally,
hydrophilic
small
compound,
glycerol,
used
adjust
helical
pitch
nanostructured
arrays,
offering
broad-range
coloration.
The
CNC-based
composite
material
further
an
coating
anti-counterfeiting
realizing
patterning
selective
changes.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(15)
Published: Jan. 3, 2022
Abstract
Colorful
blue
phase
liquid
crystal
(BPLC)
patterns
have
attracted
wide
research
attention
owing
to
their
intriguing
and
advantageous
properties
promising
applications.
However,
it
remains
a
challenge
develop
novel
high‐resolution
from
BPLC
the
complicated
synthetic
procedure
for
functional
molecules.
This
study
reports
“live”
pattern
by
well‐designed
diffusion
of
5CB
ink
on
wettability‐modified
networks.
Interestingly,
shape
color
as‐prepared
change
with
time,
which
results
in
unique
spectra
printed
pattern,
“first
red‐shift
subsequent
blue‐shift
stopband
position”
“continuous
growth
reflectivity
intensity”
time.
The
hydrophobic
substrate
greatly
suppresses
random
spreading
ink,
contributing
patterns.
applications
live
program
display
active
labels
are
demonstrated.
Various
erasable
colorful
obtained.
structure
reconfiguration
writing
erasing
processes
is
proved
transmitted
electronic
microscope
images
Kossel
diffraction
diagrams,
ensures
reversible
writing/erasing
membrane.
work
significance
development
rewritable
paper
high‐quality
optic
devices
based
materials.
Small,
Journal Year:
2022,
Volume and Issue:
18(21)
Published: April 23, 2022
Magnetic
photonic
crystals
(PCs)
possess
attractive
magnetic
orientation,
flexible
pattern
designability,
and
abundant
angle-dependent
colors,
providing
immense
potential
in
anticounterfeiting
field.
However,
all-solid
PCs-based
labels
generally
suffer
from
incompatibility
with
screen
printing
techniques,
inferior
environmental
endurance
mechanical
properties.
Herein,
by
developing
a
selective
concentration
polymerization
method
under
field
(H)
microheterogenous
dimethyl
sulfoxide-water
binary
solvents,
individual
tens-of-micrometer-length
lipophilic
nanochains
(PNCs)
of
full-width
at
half-maxima
below
30
nm
are
fabricated,
which,
after
simply
dispersed
solvent-free
cycloaliphatic
epoxy
resin,
can
be
formulated
as
inks
to
print
robust
through
an
H-assisted
screen-printing
technology.
The
as-printed
vivid
optically
variable
effects
(OVEs)
associated
the
spatial
distribution
H
directionality,
which
easy
identify
naked
eye
but
difficult
imitate
duplicate,
while
they
show
excellent
resistance
properties,
promising
practical
applications
banknotes
high-grade
commodities.
mechanism
PNCs
is
elucidated,
OVEs
deciphered
numerical
simulation.
Besides
efficient
way
build
organic-inorganic
hybrid
nanostructures,
work
provides
advanced
structural
color
pigments
achieve
application
PCs
such
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(34)
Published: June 23, 2022
While
structural
coloration
has
captured
considerable
interests
across
different
areas
in
the
past
decades,
development
of
macroscopic
objects
with
tailorable
colors
remains
a
challenge
due
to
difficulty
large-scale
fabrication
finely
ordered
nanostructures
and
poor
processability
their
constituent
materials.
In
this
work,
type
photonic
granular
hydrogel
is
developed
as
novel
printable
ink
for
constructing
customized
colored
objects.
The
magnetochromatic
exhibits
dynamic
properties
such
shear
thinning
self-healing,
enabling
direct
writing
patterns
by
extrusion
3D
printing.
Further,
modularity
allows
additive
color
mixing,
which
obviates
need
arduous
nano-synthesis
expands
on
abundance
materials
simple
yet
efficient
manner.
These
characteristics
grant
inks
great
applicability
variety
fields
including
switchable
displays,
sensors,
etc.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2022,
Volume and Issue:
10(32), P. 10641 - 10648
Published: Aug. 3, 2022
Bioinspired
coloration
of
cellulose
nanocrystals
(CNCs)
has
advanced
a
new
era
wide
applications
for
decoration,
sensing,
and
anti-counterfeiting.
However,
the
solid
structural
color
films
suffer
from
strong
angle-dependent
iridescence
limited
range
due
to
spatial
arrangement
caused
by
kinetic
arrest
during
evaporation-induced
self-assembly
CNCs.
Here,
ternary
co-assembly
approach
is
demonstrated
prepare
CNC
with
weak/non-angular
optical
response
wide-range
colors.
Structural
enabled
long-range
short-range
ordered
photonic
structure
A
cationic
polymer,
poly(dimethyl
diallyl
ammonium
chloride),
introduced
influence
through
electrostatic
attraction,
inducing
transition
disordered/short-range
as
well
presenting
gradual
change
iridescent
colors
non-iridescent
Additionally,
hydrophilic
small
compound,
glycerol,
used
adjust
helical
pitch
nanostructured
arrays,
offering
broad-range
coloration.
The
CNC-based
composite
material
further
an
coating
anti-counterfeiting
realizing
patterning
selective
changes.
