The
lack
of
handy
and
reliable
sensing
strategy
for
non-contact
freshness
assessment
is
a
problem
faced
by
food
industries.
This
work
presented
an
innovative
solution
monitoring
proteinous
foods:
halochromy-
fluorescence-based
dual-response
sensors
with
rapid
irreversible
readout.
Sensors
were
prepared
the
polycondensation
CdTe
quantum
dots
(QDs)-doped
silane
coupling
agents
onto
filter
papers
then
anchoring
pH-sensitive
halochromic
compounds
like
blueberry
anthocyanin
(BA)
electrostatic
interaction.
as-designed
showed
(within
1
min)
responsiveness
on
both
appearance
fluorescence
under
total
volatile
basic
nitrogen
(TVB-N)
atmosphere
through
structural
variations
BA
inner
effect
(IFE)-induced
quenching
QDs,
such
dual-signal
response
could
be
sustained
at
least
7
days
after
removal
TVB-N.
As
proof-of-concept,
spoilage
foods
was
experimentally
proved
to
highly
feasible
using
pork,
shrimps
shelled
eggs
as
representatives
real
samples.
Smartphone-based
digital
color
information
paper
before
furtherly
applied
reconstruct
digitized
binary
response,
reinforcing
credibility
this
strategy.
Trimethylamine
identified
UHPLC-HRMS
in
leachates
spoiled
also
double-checked
rationality
work.
ABSTRACT
In
recent
decades,
potential
challenges
associated
with
food
adulteration,
safety,
and
the
lack
of
safe
distribution
networks
have
emerged
globally.
Advances
in
science
technology
attracted
attention
consumers
toward
safety
assessment
related
technologies.
The
development
future
smart
detection
techniques,
such
as
packaging
networks,
require
enhanced
intelligence
sensitivity.
Smart
address
all
aspects
from
farm
to
fork,
including
production,
packaging,
(delivery/supply
consumers),
storage,
processing
for
consumption.
Their
could
significantly
contribute
quality,
sustainability.
Food
has
evolved
become
smarter
more
intelligent
through
integration
wireless
electronic
communication
systems,
artificial
intelligence,
Internet
Things,
5G
communication,
machine
learning,
cloud
computing.
technologies
facilitated
advancements
monitoring
applications.
This
article
introduces
concept
integrated
supply
chain
management,
which
can
enhance
product
within
entire
chain.
incorporation
sensors
various
sectors
reduced
human
involvement,
supporting
sustainable
societal
benefits.
Furthermore,
developing
biosensors
applications
are
highlighted.
A
novel
type
of
colorimetric/fluorescent
nanopaper
indicator
has
been
developed
from
the
melt-extruded
poly
(vinyl
alcohol-co-ethylene)
nanofibers
with
surface
anchored
metal-organic
frameworks
(MOFs)
by
an
interfacial
coordination
strategy.
Specifically,
fluorescein
isothiocyanate
molecules
could
be
to
nanofiber
nickel
ions
and
co-assembled
into
a
hydrophilic
nanocoating
via
dynamic
water/alcohol
solvent
evaporation
method.
Interestingly,
this
enables
fast
adsorption
moistures
interaction
biological
amine
vapors,
resulting
saffron
cake-layer
MOF
nanocrystals
ultra-sensitive
responses
based
on
alkaline
pH/ammonia
induced
competitive
mechanism.
Finally,
these
porous
nanofibrous
matrix
active
make
nano-paper
optical
platform
for
in-situ
monitoring
shrimp
freshness
mins
weeks.
Therefore,
composite
film
shows
great
potential
advanced
paper-based
indicators
food
quality
control
safety
in
processing
industry.
Graphene
nanoribbons,
particularly
armchair
graphene
nanoribbons
(AGNR),
are
effective
biosensors
for
detecting
sulfur
dioxide
(SO2)
due
to
their
unique
structural
and
electronic
properties.
This
study
uses
density
functional
theory
(DFT)
assess
the
sensitivity
of
both
pure
chromium
(Cr)-doped
five-membered
zigzag
(5-ZGNR)
Cr-doped
AGNR
SO2.
Key
findings
indicate
that
SO2
significantly
alters
properties
AGNR,
with
band
structure
showing
a
marked
increase
in
adsorption
energy
from
0.07
eV
0.55
suggesting
strong
chemisorption.
The
Fermi
surface
analysis
reveals
doping
Cr
causes
separation
levels,
resulting
forbidden
band.
substantial
change
upon
exposure
makes
highly
sensitive
detection.
Moreover,
orientation
exhibits
better
peak-to-valley
ratio
compared
orientation,
highlighting
its
superior
adsorption.
Advanced Sensor Research,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 8, 2024
Abstract
This
study
introduces
a
novel
fluorescent
light‐up
electrospun
membrane,
integrating
PbBr
2
,
which
serves
as
an
exceptionally
selective
probe
for
the
detection
of
cesium
ions
(Cs
+
).
Leveraging
superior
optical
properties
CsPbBr
3
perovskite
nanocrystals
(PNCs),
researchers
employ
electrospinning
technology
to
fabricate
test
strip,
namely
@polyacrylonitrile
(PbBr
@PAN)
nanofiber
membranes,
capable
swiftly
detecting
Cs
in
water
merely
by
observing
changes
nanocrystals'
luminescence
with
naked
eye.
By
introduction
NH
4
‐modified
montmorillonite
(NH
‐MMT),
‐MT@PAN
membranes
is
obtained.
The
selectivity
and
sensitivity
can
be
further
improved
because
‐MMT
endows
hydrophilic
property
adsorption
toward
ions.
membrane's
fabrication
simple,
scalable,
cost‐effective,
high
down
44
ppb.
innovation
enables
efficient,
on‐site
monitoring
critical
environmental
safety
nuclear
waste
management.
The
lack
of
handy
and
reliable
sensing
strategy
for
non-contact
freshness
assessment
is
a
problem
faced
by
food
industries.
This
work
presented
an
innovative
solution
monitoring
proteinous
foods:
halochromy-
fluorescence-based
dual-response
sensors
with
rapid
irreversible
readout.
Sensors
were
prepared
the
polycondensation
CdTe
quantum
dots
(QDs)-doped
silane
coupling
agents
onto
filter
papers
then
anchoring
pH-sensitive
halochromic
compounds
like
blueberry
anthocyanin
(BA)
electrostatic
interaction.
as-designed
showed
(within
1
min)
responsiveness
on
both
appearance
fluorescence
under
total
volatile
basic
nitrogen
(TVB-N)
atmosphere
through
structural
variations
BA
inner
effect
(IFE)-induced
quenching
QDs,
such
dual-signal
response
could
be
sustained
at
least
7
days
after
removal
TVB-N.
As
proof-of-concept,
spoilage
foods
was
experimentally
proved
to
highly
feasible
using
pork,
shrimps
shelled
eggs
as
representatives
real
samples.
Smartphone-based
digital
color
information
paper
before
furtherly
applied
reconstruct
digitized
binary
response,
reinforcing
credibility
this
strategy.
Trimethylamine
identified
UHPLC-HRMS
in
leachates
spoiled
also
double-checked
rationality
work.
