ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(5), P. 4456 - 4466
Published: Jan. 26, 2024
Metal
halide
perovskites
offer
ample
opportunities
to
develop
advanced
optoelectronic
devices.
This
work
showcases
that
the
integration
of
metal
into
oxide
nanoshells
with
controllable
interior
cavities
can
enable
water-vapor-responsive
dual-mode
switching
fluorescence
and
structural
color.
Through
a
ship-in-a-bottle
method
introduce
controlled
amount
CsPbBr3
MnO2
nanoshells,
we
have
designed
CsPbBr3@MnO2
yolk–shell
nanostructures,
which
uptake
defined
water
exhibit
rapid
(less
than
1
s)
reversible
(≥100
cycles)
responses
in
both
on–off
color
change
when
exposed
dynamic
vapor.
These
originate
from
water-triggered
phase
transformation
CsPb2Br5
shell.
The
altered
electronic
bonding
structure
at
oxide–halide
interface,
accumulation
cavity,
protective
effect
shell
facilitate
transformations.
response
characteristics
nanostructures
been
further
demonstrated
fabricating
patterned
films
capable
multiple
fluorescence/structural
responses,
highlighting
their
potential
for
applications
anticounterfeiting
encryption.
Small,
Journal Year:
2023,
Volume and Issue:
19(32)
Published: May 10, 2023
Abstract
Advanced
multiplexing
optical
labels
with
multiple
information
channels
provide
a
powerful
strategy
for
large‐capacity
and
high‐security
encryption.
However,
current
face
challenges
of
difficulty
to
realize
independent
multi‐channel
encryption,
cumbersome
design,
environmental
pollution.
Herein,
chiroptical
bio‐labels
integrating
elements,
including
structural
color,
photoluminescence
(PL),
circular
polarized
light
activity,
humidity‐responsible
micro/nano
physical
patterns,
are
constructed
in
complex
design
based
on
host‐guest
self‐assembly
cellulose
nanocrystals
bio‐gold
nanoclusters.
The
thin
nanocellulose
exhibit
tunable
color
crossover
the
entire
visible
wavelength
circularly
PL
highest‐recorded
dissymmetry
factor
up
1.05
due
well‐ordered
chiral
organization
templated
gold
Most
importantly,
these
elements
can
independently
encode
customized
anti‐counterfeiting
achieve
five
high‐level
anti‐counterfeiting,
which
rarely
achieved
traditional
materials
counterparts.
Considering
exceptional
seamless
integration
encryption
recyclable
features
labels,
have
great
potential
next
generation
technology.
Small,
Journal Year:
2024,
Volume and Issue:
20(30)
Published: Feb. 17, 2024
Abstract
Thermochromic
photonic
crystal
(PC)
is
a
promising
material
for
anti‐counterfeiting
applications,
but
there
are
still
challenges
to
further
improve
the
performance
and
practicability
in
usage.
Here,
disposable
thermally
triggered
PC
tag
with
irreversible
response
multi‐step
color
changes
developed
based
on
thermochromic
Silica/(Polyethylene
glycol‐Ethoxylated
trimethylolpropane
triacrylate)
(SiO
2
/(PEG‐ETPTA))
double‐layer
film.
The
fast
thermal
come
from
quick
melting
infiltration
of
PEG‐ETPTA
into
PCs
upon
heating.
change
at
different
temperatures
originated
regioselective
control
UV
curing
degree
layer
resulting
temperature
Therefore,
invisible
pattern
can
be
revealed
part
by
heating
became
again
after
overheating,
which
offered
diversified
visual
effects
enhanced
performances.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(32)
Published: June 4, 2024
Abstract
Developing
high‐performance
polarization‐sensitive
ultraviolet
photodetectors
is
crucial
for
their
application
in
military
remote
sensing,
detection,
bio‐inspired
navigation,
and
machine
vision.
However,
the
significant
absorption
visible
light
range
severely
limits
of
photodetectors,
such
as
high‐quality
anti‐interference
imaging.
Here,
based
on
a
wide‐bandgap
organic
semiconductor
single
crystal
(trans‐1,2‐bis(5‐phenyldithieno[2,3‐b:3′,2′‐d]thiophen‐2‐yl)ethene,
BPTTE),
solar‐blind
with
dichroic
ratio
close
to
4.26
are
demonstrated.
The
strong
anisotropy
2D
grown
BPTTE
crystals
molecular
vibration
optical
characterized
by
various
techniques.
Under
voltage
modulation,
stable
efficient
detection
polarized
demonstrated,
attributed
intrinsic
transition
dipole
moment
bc
plane,
rather
than
other
factors.
Finally,
high‐contrast
polarimetric
imaging
successfully
demonstrated
highlighting
potential
semiconductors
photodetectors.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(2), P. 2888 - 2901
Published: Jan. 2, 2024
Physically
unclonable
function
(PUF)
methods
have
high
security,
but
their
wide
application
is
limited
by
complex
encoding,
large
database,
advanced
external
characterization
equipment,
and
complicated
comparative
authentication.
Therefore,
we
creatively
propose
the
physically
holographic
encryption
anticounterfeiting
based
on
light
propagation
of
medium
fluorescent
labels.
As
far
as
know,
this
first
method
with
a
fluorescence
property.
The
proposed
reduces
above
requirements
traditional
PUF
significantly
cost.
angle-multiplexed
label
physical
secret
key.
information
encrypted
computer-generated
holograms
(CGH).
Many
parameters
in
system
are
used
parameter
keys.
Diffie–Hellman
key
exchange
algorithm
improved
to
transfer
A
variety
hologram
generation
compared.
effectiveness,
robustness
studied
analyzed.
Finally,
graphical
user
interface
(GUI)
designed
for
convenience
users.
advantages
include
lower
encoding
complexity,
effective
reduction
database
size,
direct
use
decrypted
without
authentication
reduce
misjudgment.
It
believed
that
paper
will
pave
way
popularization
PUF-based
methods.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(5), P. 4456 - 4466
Published: Jan. 26, 2024
Metal
halide
perovskites
offer
ample
opportunities
to
develop
advanced
optoelectronic
devices.
This
work
showcases
that
the
integration
of
metal
into
oxide
nanoshells
with
controllable
interior
cavities
can
enable
water-vapor-responsive
dual-mode
switching
fluorescence
and
structural
color.
Through
a
ship-in-a-bottle
method
introduce
controlled
amount
CsPbBr3
MnO2
nanoshells,
we
have
designed
CsPbBr3@MnO2
yolk–shell
nanostructures,
which
uptake
defined
water
exhibit
rapid
(less
than
1
s)
reversible
(≥100
cycles)
responses
in
both
on–off
color
change
when
exposed
dynamic
vapor.
These
originate
from
water-triggered
phase
transformation
CsPb2Br5
shell.
The
altered
electronic
bonding
structure
at
oxide–halide
interface,
accumulation
cavity,
protective
effect
shell
facilitate
transformations.
response
characteristics
nanostructures
been
further
demonstrated
fabricating
patterned
films
capable
multiple
fluorescence/structural
responses,
highlighting
their
potential
for
applications
anticounterfeiting
encryption.
