ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(51), С. 70656 - 70664
Опубликована: Дек. 12, 2024
In
this
work,
we
demonstrate
the
visualization
of
complex
magnetic
fields
by
utilizing
magneto-photonic
effect
Fe3O4@SiO2
nanorod
suspension
with
one-to-one
correspondence
between
visible
colors
and
field
directions.
The
selected
anisotropic
nanorods
possess
appropriate
saturated
magnetization
high
electrostatic
repulsion,
which
is
magnetically
direction-responsive
but
strength-insensitive,
accurately
detecting
direction
while
eliminating
influence
from
intensity.
combined
experiment-simulation
study
validates
accuracy
simulation,
allowing
us
to
further
determine
intensity
distribution
field.
packed
photonic
device's
spatial
(∼20
μm)
temporal
(∼1
ms)
resolutions
were
confirmed
time-resolved
ultrasmall-angle
X-ray
scattering
(USXAS)
tests,
as
well
observations
using
an
optical
microscope
a
high-speed
camera.
Our
work
provides
new
technique
for
visualizing
opens
avenue
toward
studying
various
purposes.
Abstract
Bio‐enabled
and
bio‐mimetic
nanomaterials
represent
functional
materials,
which
use
bio‐derived
materials
synthetic
components
to
bring
the
better
of
two,
natural
synthetic,
worlds.
Prospective
broad
applications
are
flexibility
mechanical
strength
lightweight
structures,
adaptive
photonic
functions
chiroptical
activity,
ambient
processing
sustainability,
potential
scalability
along
with
sensing/communication
abilities.
Here,
we
summarize
recent
results
on
relevant
responsive
behavior
under
stresses,
magnetic
field,
changing
chemical
environment.
We
focus
achievements
trends
in
tuning
optical
materials'
properties
such
as
light
scattering,
absorption
reflection,
emission,
structural
colors,
birefringence,
linear
circular
polarization
for
prospective
biosensing,
communication,
encoding,
fast
actuation,
biomedical
fields,
tunable
appearance.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(35)
Опубликована: Июнь 7, 2024
Dynamic
optical
modulation
in
response
to
stimuli
provides
exciting
opportunities
for
designing
novel
sensing,
actuating,
and
authentication
devices.
Here,
we
demonstrate
that
the
reversible
swelling
deswelling
of
crosslinked
polymer
colloidal
spheres
pH
temperature
changes
can
be
utilized
drive
assembly
disassembly
embedded
gold
nanoparticles
(AuNPs),
inducing
their
plasmonic
coupling
decoupling
and,
correspondingly,
color
changes.
The
multi-responsive
colloids
are
created
by
depositing
a
monolayer
AuNPs
on
surface
resorcinol-formaldehyde
(RF)
nanospheres,
then
overcoating
them
with
an
additional
RF
layer,
followed
seeded
growth
process
enlarge
reduce
interparticle
separation
induce
significant
coupling.
This
configuration
facilitates
dynamic
through
swelling/deswelling
rapid
repeatable
transitions
between
coupled
decoupled
states
enable
switching
when
form
or
hydrogel
substrates.
Furthermore,
leveraging
photothermal
effect
stimuli-responsive
enables
construction
hybrid
films
featuring
switchable
anticounterfeiting
patterns,
showcasing
versatility
potential
this
multi-stimuli-responsive
system.
Photofunctional
nanomaterials
have
shown
great
potential
in
biomedical
applications
due
to
their
unique
optical
properties
and
size
effects.
This
chapter
focuses
on
"General
Introduction
Background
of
Nanomaterials
Biomedical
Applications."
First,
a
brief
introduction
is
given,
describing
basic
importance
various
fields.
Secondly,
the
concepts
photofunctional
physicochemical
effects
under
light
conditions,
such
as
photothermal
effect,
photoluminescence,
photovoltaic
photochemical
are
presented.
Next,
an
overview
nanobiomedicine
presented,
highlighting
for
applications.
Then,
different
types
nanomaterials,
including
fluorescent,
photothermal,
photodynamic,
photoelectrochemical
photoacoustic
discussed
detailed
classification
fields
bioimaging,
antimicrobial,
oncological
diagnosis
treatment,
biodetection
sensing
discussed.
Finally,
current
research
results
summarized
future
development
field
envisaged.
Anticounterfeiting
technologies
have
become
increasingly
crucial
due
to
the
growing
issue
of
counterfeit
goods,
particularly
in
high-value
industries.
Traditional
methods
such
as
barcodes
and
holograms
are
prone
replication,
prompting
need
for
advanced,
cost-effective,
efficient
solutions.
In
this
work,
a
practical
application
anodic
aluminum
oxide
(AAO)
membranes
presented
anticounterfeiting,
which
addresses
challenges
high
production
costs
complex
fabrication
processes.
Unlike
previous
approaches
requiring
metal
coatings
color
generation,
method
uses
commercial
foils
produce
colorful
AAO
without
layers.
Elemental
mapping
suggests
that
impurities
on
surface
contribute
enhanced
reflectivity,
aiding
photonic
crystal
formation.
A
two-step
anodization
process
creates
patterned
is
further
introduced,
with
pattern
clarity
controlled
by
time.
Additionally,
pH-responsive
film
composed
2-anilino-6-dibutylaminofluoran
(ODB-2)
thermoplastic
polyurethane
(TPU)
integrated,
enabling
dynamic
changes
under
varying
pH
conditions,
enhancing
anticounterfeiting
functionality.
This
streamlined
approach
provides
scalable
cost-effective
solution
developing
versatile
industrial
applications.
