Abstract
Photoreversible
color
switching
systems
(PCSSs)
exhibiting
multi‐color
responses
to
visible
light
are
favored
for
sustainable
societal
development
over
those
relying
on
ultraviolet
due
safer
operation
and
better
penetration
depth.
Here,
a
PCSS
capable
of
responsive
based
highly
photoreductive
rutile‐phase
Sn‐doped
TiO
2−x
nanoparticles
is
reported.
The
Sn‐doping
significantly
red‐shifts
the
absorption
band
region,
improving
charge
separation
transfer
efficiencies
introducing
Ti
3+
species
oxygen
vacancies
as
internal
sacrificial
electron
donors
scavenging
photogenerated
holes.
resulting
feature
exceptional
photoreduction
ability
activity,
thereby
enabling
photoreversible
various
redox
dyes
operational
under
illumination.
Furthermore,
can
be
achieved
via
overlay
effect
by
combining
different
in
one
system,
opening
door
many
advanced
applications,
demonstrated
their
successful
uses
developing
visible‐light‐driven
rewritable
light‐printing
visual
information
displays.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(16), С. 6310 - 6319
Опубликована: Апрель 9, 2024
The
development
of
visible-light-responsive
inorganic
photoreversible
color
switching
materials
(PCSMs)
for
constructing
long-legible
rewritable
papers
is
fascinating
owing
to
resource
sustainability.
This
work
reports
the
colloidal
synthesis
WO3–x
hierarchical
nanostructures
constructed
by
2D
thin
with
crystalline/amorphous
homojunctions
that
show
excellent
properties.
surface-bound
hydroxyl
ligands,
oxygen
vacancies,
and
could
enhance
absorption
in
visible
region,
improve
charge
separation
transfer
efficiencies,
act
as
internal
sacrificial
electron
donors
scavenging
photogenerated
holes,
endowing
high
photoreductive
activity.
protons
localized
promote
photoreduction
coloration
process
stabilize
metastable
W5+
species
discoloration
process,
enabling
rapid
30
s
upon
437
nm
light
illumination
stability
under
ambient
air
conditions
(∼51
days).
A
light-printable
paper
(LPRP)
fabricated
exhibits
a
grayish
white
background,
reusability
(>100
times),
long
legible
time
(>30
days),
negligible
interference
office
light,
contrast.
Moreover,
LPRP
can
be
used
direct
laser
printing,
which
fully
compatible
current
printing
technology.
opens
an
avenue
designing
PCSMs
utilizing
practical
applications.
ACS Applied Polymer Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 15, 2025
Most
of
the
current
studies
on
preparation
stimulus-responsive
smart
hydrogel
textiles
are
conducted
at
fabric
level,
ignoring
direct
modulation
structure
and
properties
by
yarns.
Compared
with
smart-responsive
fabrics,
yarns
can
not
only
be
used
individually
but
also
woven
into
complex
structures
brilliant
patterns.
However,
constructing
PCs
to
prepare
a
rough
surface,
hair,
large
surface
undulations
remains
major
challenge.
In
this
study,
that
had
no
color
in
dry
state
could
quickly
show
bright
eye-catching
structural
colors
after
coming
contact
water
were
prepared.
Results
demonstrated
prepared
P(NIPA-co-St)
microspheres
exhibited
good
sphericity
monodispersibility.
The
glass-transition
temperature
increased
6.77
°C
compared
pure
PNIPA
microspheres.
Photonic
crystal
(PCH)
vibrant
structured
was
easily
assembled
when
concentration
about
8.5
wt
%
self-assembly
25
°C.
fast
response
time
excellent
rubbing
fastness,
washing
reusability.
blended
ordinary
produce
warning
textiles.
immediately
display
rainy
or
foggy
weather
without
affecting
original
pattern
climate.
This
research
provides
ideas
for
realizing
made
from
Abstract
Utilization
of
life‐like
hydrogels
to
replicate
synergistic
shape/color
changeable
behaviors
living
organisms
has
been
long
envisaged
produce
robust
functional
integrated
soft
actuators/robots.
However,
it
remains
challenging
construct
such
hydrogel
systems
with
functionality
remote,
localized
and
environment‐interactive
control
over
discoloration/actuation.
Herein,
inspired
by
the
evolution‐optimized
bioelectricity
stimulus
multilayer
structure
natural
reptile
skins,
electronically
innervated
fluorescence‐color
switchable
actuating
bio‐inspired
comprising
responsive
fluorescent
sheet
conductive
Graphene/PDMS
film
electrothermal
effect
is
presented.
Such
rational
enables
remote
shape
changes
via
cascading
“electrical
trigger‐Joule
heat
generation‐hydrogel
shrinkage”
mechanism.
Consequently,
local/sequential
discoloration/actuation
are
achieved
due
highly
controllable
electrical
in
terms
amplitude
circuit
design.
Furthermore,
joint
use
acoustic
sensors,
chameleon
robots
unprecedented
adaptation
demonstrated,
which
can
intelligently
sense
environment
signals
adjust
their
color/shape‐changeable
behaviors.
This
work
opens
previously
unidentified
avenues
for
actuators/robots
will
inspire
intelligent
versatile
uses.
Abstract
Photoreversible
color
switching
systems
(PCSSs)
exhibiting
multi‐color
responses
to
visible
light
are
favored
for
sustainable
societal
development
over
those
relying
on
ultraviolet
due
safer
operation
and
better
penetration
depth.
Here,
a
PCSS
capable
of
responsive
based
highly
photoreductive
rutile‐phase
Sn‐doped
TiO
2−x
nanoparticles
is
reported.
The
Sn‐doping
significantly
red‐shifts
the
absorption
band
region,
improving
charge
separation
transfer
efficiencies
introducing
Ti
3+
species
oxygen
vacancies
as
internal
sacrificial
electron
donors
scavenging
photogenerated
holes.
resulting
feature
exceptional
photoreduction
ability
activity,
thereby
enabling
photoreversible
various
redox
dyes
operational
under
illumination.
Furthermore,
can
be
achieved
via
overlay
effect
by
combining
different
in
one
system,
opening
door
many
advanced
applications,
demonstrated
their
successful
uses
developing
visible‐light‐driven
rewritable
light‐printing
visual
information
displays.
