ACS Macro Letters,
Journal Year:
2024,
Volume and Issue:
13(6), P. 788 - 797
Published: June 5, 2024
Quantifying
adhesion
is
crucial
for
understanding
mechanisms
and
developing
advanced
dopamine-inspired
materials
devices.
However,
achieving
nondestructive
real-time
quantitation
of
using
optical
spectra
remains
challenging.
Here,
we
present
a
orthogonal
phenanthrenequinone
photochemistry
strategy
the
one-step
visual
fluorescent
spectra.
This
utilizes
phenanthrenequinone-mediated
to
facilitate
conjoined
network
formation
in
adhesive
through
simultaneous
photoclick
cycloaddition
free-radical
polymerization.
The
resulting
hydrogel-like
exhibits
good
mechanical
performance,
with
Young's
modulus
300
kPa,
toughness
750
kJ
m–3,
fracture
energy
4500
J
m–2.
adhesive,
along
polycyclic
aromatic
phenanthrenequinones,
shows
strong
(>100
kPa)
interfacial
thresholds
(250
m–2)
on
diverse
surfaces─twice
triple
as
much
typical
dopamine-contained
adhesives.
Importantly,
such
an
demonstrates
excellent
performance
under
UV
irradiation,
closely
correlating
its
strengths.
Their
fluorescence
intensities
remain
constant
after
continuous
stretching/releasing
treatment
even
dried
state.
Therefore,
this
readily
available
various
conditions.
Moreover,
precursor
chemically
ultrastable
more
than
seven
months
achieves
substrates
within
seconds
upon
blue
light
irradiation.
As
proof-of-concept,
leverage
rapid
printability
create
patterns
structures,
showcasing
applications
information
storage,
prediction,
self-reporting
properties.
general
straightforward
holds
promise
rapidly
preparing
functional
designing
high-performance
wearable
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(27), P. 35279 - 35292
Published: June 27, 2024
Mechanoluminescence
(ML)
is
the
nonthermal
luminescence
generated
in
process
of
force-to-light
conversion,
which
has
broad
prospects
stress
sensing,
wearable
devices,
biomechanics,
and
multiple
information
anticounterfeiting.
Multivalence
emitter
ions
utilize
their
own
self-reduction
to
realize
multiband
ML
without
introducing
another
dopant,
such
as
Eu3+/Eu2+,
Sm3+/Sm2+,
Mn4+/Mn2+.
However,
self-reduction-induced
bismuth-activated
materials
rarely
been
reported
so
far.
In
this
work,
a
novel
visible-to-near-infrared
(vis-NIR)
induced
by
Bi3+
Bi2+
spinel-type
compound
(MgGa2O4)
reported.
The
photoluminescence
(PL)
spectra,
PL
excitation
(PLE)
lifetime
curves
demonstrate
that
Bi3+/Bi2+
are
main
centers.
Notably,
possible
model
proposed,
where
magnesium
vacancy
(VMg″)
considered
driving
force
for
Bi2+.
Furthermore,
an
oxygen
(VO••)
confirmed
electron
paramagnetic
resonance
(EPR)
spectroscopy.
Combined
with
thermoluminescence
(TL)
glow
plausible
trap-controlled
mechanism
illustrated,
electron-hole
(VO••/VMg″)
pairs
play
significant
role
capturing
electrons
holes.
It
worth
noting
proof-of-concept
dual-mode
electronic
signature
application
implemented
based
on
flexible
film,
improves
capabilities
anticounterfeiting
high-level
security
applications.
Besides,
multistimulus-responsive
behaviors
film
realized
under
254
nm
UV
lamp,
thermal
disturbance,
980
laser,
mechanical
stimuli.
general,
study
provides
new
insights
into
designing
vis-NIR
toward
wider
possibilities.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 18, 2024
The
ability
to
reversibly
exhibit
structural
color
patterns
has
positioned
photonic
crystals
(PCs)
at
the
forefront
of
anti-counterfeiting.
However,
security
offered
by
mere
reversible
display
is
susceptible
illicit
alteration
and
disclosure.
Herein,
inspired
electronic
message
captcha,
bilayer
crystal
(BPC)
systems
with
integrated
decryption
verification
modules,
are
realized
combining
inverse
opal
(IO)
double
(DIO)
polyacrylate
polymers.
When
informationized
BPC
immersed
in
ethanol
or
water,
DIO
layer
displayed
encrypted
information
due
solvent-induced
ordered
rearrangement
polystyrene
(PS)
microspheres.
step
established
based
on
different
colors
IO
pattern,
which
result
from
deformation
recovery
macroporous
skeleton
induced
solvent
evaporation.
Moreover,
through
evaporation-induced
random
self-assembly
PS@SiO
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 11, 2024
Counterfeit
identity
(ID)
documents
pose
a
serious
threat
to
personal
credit
and
national
security.
As
promising
candidate,
optical
physical
unclonable
functions
(PUFs)
offer
robust
defense
mechanism
against
counterfeits.
Despite
the
innovations
in
chemically
synthesized
PUFs,
challenges
persist,
including
harmful
chemical
treatments,
low
yields,
incompatibility
of
reaction
conditions
with
ID
document
materials.
More
notably,
surface
relief
nanostructures
for
such
as
wrinkles,
are
still
at
risk
being
replicated
through
scanning
lithography
or
nanoimprint.
Here,
femtosecond
laser-induced
recrystallized
silicon
nanotexture
is
reported
latent
PUF
nanofingerprint
anti-counterfeiting.
With
laser
irradiation,
nanotextures
spontaneously
emerge
within
100
ms
exposure.
By
introducing
low-absorption
metal
layer,
plasmon
polariton
waves
excited
on
silicon-metal
multilayer
nanofilms
long-range
boosting,
ensuring
uniqueness
non-replicability
final
nanotextures.
Furthermore,
induces
phase
transition
from
amorphous
polycrystalline
state,
rather
than
creating
replicable
wrinkles.
The
random
easily
identifiable
microscopy
Raman
imaging,
yet
they
remain
undetectable
by
characterization
methods
electron
atomic
force
microscopies.
This
property
significantly
hinders
counterfeiting
efforts,
it
prevents
precise
replication
these
nanostructures.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 31, 2024
Abstract
With
the
increasing
popularity
of
internet,
it
brings
convenience
to
lives
while
also
increases
security
risks.
Physical
Unclonable
Functions
(PUFs)
can
generate
random,
unclonable,
and
unique
identifiers
using
their
inherent
physical
characteristics,
which
have
broad
prospects
in
anti‐counterfeiting.
Herein,
inspired
by
irregular
tree
bark
fissures
random
skin
wrinkles
found
nature,
a
method
for
creating
complex
micro‐wrinkles
with
unclonable
patterns
is
proposed
simply
stretching
hydrogels.
The
texture
information
contained
digitized
into
binary
codes
an
adaptive
threshold
algorithm.
Additionally,
novel
“sandwich”
label
multilevel
intelligent
anti‐counterfeiting
system
proposed.
first‐level
involves
photoluminescence
encryption
adjustable
luminescence
within
visible
light
range
modulated
at
different
excitation
wavelengths;
second‐level
includes
strain‐related
mechanical
encryption,
third‐level
consists
highly
micro‐wrinkles.
certification
difficulty
as
grade
increases,
thereby
enhancing
security.
Furthermore,
space‐selective
doping
rare
earth
metal–organic
framework
(RE‐MOF)
fluorescent
materials
hydrogels
achieved
through
use
screen‐printing
technology.
concept
smart
PUF
labels
will
further
enhance
current
levels
counterfeiting
prevention.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 2, 2025
Abstract
With
the
increasing
demand
for
anti‐counterfeiting
measures,
efficient
integration
of
multi‐level
optical
information
has
become
a
critical
challenge.
In
this
study,
novel
bottom‐up
self‐assembly
technique
is
introduced
fabricating
composite
integrated
films.
This
method
overcomes
size
limitations
phosphors
that
achieve
circularly
polarized
light
(CPL)
through
co‐assembly
with
cellulose
nanocrystals.
Specifically,
rare
earth
metal‐organic
frameworks
length
140
µm
can
generate
CPL
an
asymmetry
factor
0.65.
Moreover,
introduction
random
defects
in
film
imparts
unpredictable
properties,
enabling
dynamic
auroral
within
decryption
path.
Additionally,
innovative
two‐stage
serial
process
proposed
by
leveraging
non‐correlation
between
orthogonal
patterns.
Notably,
label
surface
features
biomimetic
fingerprint
textures
exhibit
3D
physical
unclonable
functions
(PUFs)
at
mesoscopic
scale.
These
possess
high
entropy
close
to
ideal
value
1,
and
encoding
capacity
175
×
2
area
reaches
62500
.
summary,
achieves
degree
combining
three
levels
information:
full‐chromatographic
tunable
photoluminescence,
spatially
selective
aurora
responses,
bionic
PUFs
fingerprints.
FlexMat.,
Journal Year:
2024,
Volume and Issue:
1(2), P. 116 - 126
Published: May 7, 2024
Abstact
Counterfeiting
remains
a
significant
threat,
causing
economic
and
safety
concerns.
Addressing
this,
authentication
technologies
have
gained
traction.
With
the
rise
of
Internet
Things,
is
crucial.
Photonic
Physical
Unclonable
Functions
(PUFs)
offer
unique
identifiers.
We
present
low‐cost
sustainable
e‐tags
that
may
be
printed
virtually
on
any
surface
for
due
to
bespoke
texturization
inks
surface‐modified
carbon
dots.
A
single
e‐tag
provides
randomized
phosphorescence
(or
afterglow)
patterns,
which
provide
multiple
layers
by
exploiting
different
patterning,
excitation
energies,
temporal
characteristics.
comprehensive
case
study
employing
photonic
challenge‐response
pairs,
involving
sample
size
up
2
9
emission
spectra
in
combination
with
10
photographs
taken
smartphone,
displays
low
probability
error
(<10
−11
),
supports
potential
our
combined
approach
toward
development
more
robust
PUF
systems.
