Talanta Open,
Год журнала:
2023,
Номер
7, С. 100223 - 100223
Опубликована: Апрель 28, 2023
A
flexible
Surface-Enhanced
Raman
Spectroscopy
(SERS)
substrate
based
on
silver
nanoparticles
encapsulated
in
an
agar
gel
has
been
probed
to
detect
the
fungicide
thiabendazole
(TBZ)
reaching
a
limit
of
detection
(LOD)
30
ng/cm2.
In
addition,
simple
and
sensitive
strategy
was
employed
for
in-situ
TBZ
fruit
vegetable
peels.
For
that
purpose,
peels
different
fruits
vegetables
were
intentionally
contaminated
with
amount
TBZ,
analyte
subsequently
extracted
within
few
seconds
by
gently
rubbing
surface
SERS
substrate.
The
lowest
value
detected
eggplant
green
pepper
50
values
achieved
apple
pear
0.20
μg/cm2
40
ng/cm2,
respectively.
On
other
hand,
tomato
strawberry
0.50
μg/cm2.
variation
sensitivity
can
be
attributed
differences
properties
above
results
show
this
further
contaminants
practical
applications
food
safety
inspection.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 20, 2025
Abstract
Engineering
wearable
devices
for
in
situ
and
on‐site
monitoring
of
pesticide
residues
from
plants
a
non‐destructive
manner
is
great
research
value
but
remains
huge
challenge.
In
this
study,
plant‐wearable
fluorescence
sensor
CdTe
CDs@PVA@AG,
designed
constructed
by
embedding
QDs
polyvinyl
alcohol
(PVA)
agarose
(AG)‐co‐assembled
double‐network
hydrogel
to
transmit
on‐the‐scene
pesticides
messages.
Harnessing
red
emission
stimuli‐responsive
performance
QDs,
as
well
hydrogel's
excellent
flexibility,
high
adhesion,
porous
network,
CDs@PVA@AG
endowed
with
quantitative
response
thiram
at
≈µ
m
level
within
2
min
through
promoting
silence
conjunction
the
transformation
images
into
primary
colors
digital
signals.
More
interestingly,
capable
being
tightly
pasted
onto
various
crops’
surfaces
then
not
only
explored
appraise
residue
levels
also
profile
dynamic
degradation,
manner.
This
work
opens
up
new
avenue
engineer
situ,
on‐site,
capturing
information
crops,
favoring
accurate
health
status
rapid
healthy
development
smart
agriculture.
Micromachines,
Год журнала:
2023,
Номер
14(7), С. 1343 - 1343
Опубликована: Июнь 30, 2023
Sustainable
and
safe
food
is
an
important
issue
worldwide,
it
depends
on
cost-effective
analysis
tools
with
good
sensitivity
reality.
However,
traditional
standard
chemical
methods
of
safety
detection,
such
as
high-performance
liquid
chromatography
(HPLC),
gas
(GC),
tandem
mass
spectrometry
(MS),
have
the
disadvantages
high
cost
long
testing
time.
Those
prevented
people
from
obtaining
sufficient
risk
information
to
confirm
their
products.
In
addition,
testing,
bioassay
method,
often
results
in
false
positives
or
negatives
due
little
rigor
preprocessing
samples.
So
far,
currently
relies
enzyme-linked
immunosorbent
assay
(ELISA),
polymerase
chain
reaction
(PCR),
HPLC,
GC,
UV-visible
spectrophotometry,
MS,
all
which
require
significant
time
train
qualified
laboratory
operators.
These
factors
hindered
development
rapid
monitoring
systems,
especially
remote
areas
a
relative
lack
resources.
Surface-enhanced
Raman
spectroscopy
(SERS)
has
emerged
one
choice
for
that
can
overcome
these
dilemmas
over
past
decades.
SERS
offers
advantages
chromatographic
its
portability,
non-destructive
nature,
lower
implications.
stands,
supplemental
tool
analysis,
reinforcing
enhancing
completeness
coverage
system.
combines
portability
cheaper
detection
costs
gain
advantage
analysis.
encountered
many
challenges
moving
toward
regulatory
applications
safety,
quantitative
accuracy,
poor
reproducibility,
instability
large
molecule
detection.
As
result,
reality
SERS,
screening
announcements
still
uncommon.
this
review
article,
we
compiled
current
designs
fabrications
substrates
unify
requirements
opportunities
challenges.
This
expected
improve
interest
sensing
field
facilitate
future.
Surface-enhanced
Raman
scattering
(SERS)
is
an
analytical
technique
capable
of
detecting
trace
amounts
specific
species.
The
uniqueness
vibrational
signatures
a
major
advantage
SERS.
This
combination
sensitivity
and
specificity
has
motivated
researchers
to
develop
diverse
methodologies
leveraging
However,
even
50
years
after
its
first
observation,
SERS
still
perceived
as
unreliable
for
quantification.
perception
precluded
the
application
in
laboratories
that
rely
on
consistent
quantification
(for
regulatory
purposes,
instance).
In
this
review,
we
describe
some
aspects
lead
intensity
variations
how
those
challenges
were
addressed
technique.
goal
identify
sources
intensities
then
demonstrate
that,
with
these
pitfalls,
can
be
used
when
factors
such
nature
substrate,
experimental
conditions,
sample
preparation,
surface
chemistry,
data
analysis
are
carefully
considered
tailored
particular
application.
Analytical Chemistry,
Год журнала:
2023,
Номер
95(50), С. 18415 - 18425
Опубликована: Дек. 7, 2023
Bacterial
infections
caused
by
pathogenic
microorganisms
have
become
a
serious,
widespread
health
concern.
Thus,
it
is
essential
and
required
to
develop
multifunctional
platform
that
can
rapidly
accurately
determine
bacteria
effectively
inhibit
or
inactivate
pathogens.
Herein,
microarray
SERS
chip
was
successfully
synthesized
using
novel
metal/semiconductor
composites
(ZnO@Ag)-ZnO
nanoflowers
(ZnO
NFs)
decorated
with
Ag
nanoparticles
(Ag
NPs)
arrayed
on
paper-based
as
supporting
substrate
for
in
situ
monitoring
photocatalytic
inactivation
of
bacteria.
Typical
Gram-positive
Staphylococcus
aureus
Gram-negative
Escherichia
coli
Vibrio
parahemolyticus
were
selected
models.
Partial
least-squares
discriminant
analysis
(PLS-DA)
performed
minimize
the
dimensionality
spectra
data
sets
cost-effective
identification
model.
The
classification
accuracy
100,
97.2,
100%
S.
aureus,
E.
coli,
V.
parahemolyticus,
respectively.
antimicrobial
activity
ZnO@Ag
proved
microbroth
dilution
method,
minimum
inhibitory
concentrations
(MICs)
40,
50,
55
μg/mL,
Meanwhile,
demonstrated
remarkable
performance
under
natural
sunlight
bacteria,
rates
97.03
97.56%,
As
result,
not
only
detected
high
sensitivity
but
also
confirmed
antibacterial
sterilization
properties.
Consequently,
offers
highly
prospective
strategies
foodborne
diseases
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 24, 2024
Cellulose
nanofiber
(CNF)
holds
great
promise
in
applications
such
as
surface-enhanced
Raman
scattering
(SERS),
catalysis,
esthesia,
and
detection.
This
study
aimed
to
build
novel
CNF-based
SERS
substrates
through
a
facile
synthetic
method.
Citrate-reduced
gold
nanoparticles
(AuNPs)
were
adsorbed
on
the
cationized
CNF
surface
due
electrostatic
interactions,
uniform
AuNPs@(2,3-epoxypropyl
trimethylammonium
chloride)EPTMAC@CNF
flexible
prepared
by
simple
vacuum-assisted
filtration
The
probe
molecule
methylene
blue
was
chosen
assess
performance
of
substrate
with
sensitivity
up
10-9
M,
superior
signal
reproducibility
(relative
standard
deviation
(RSD)
=
4.67%),
storage
stability
(more
than
30
days).
Tensile
strength
tests
indicated
that
films
had
good
mechanical
properties.
In
addition,
can
easily
capture
visually
identify
microplastics
water.
These
results
demonstrate
potential
application
flexible,
self-assembled
AuNPs@EPTMAC@CNF
for
prompt
sensitive
detection
trace
substances.
Detection
of
melamine
has
proven
to
be
a
challenge,
requiring
the
use
complex
analytical
techniques.
This
study
introduces
an
innovative,
straightforward
one-pot
technique
for
qualitative
assessment
milk
adulterant
melamine.
Originally,
silver
nanoparticles
(AgNPs)
were
synthesized
by
utilizing
green
tea
extract,
which
acted
as
both
reducing
and
sensing
element.
The
AgNPs
characterized
using
UV–vis
spectroscopy,
X-ray
diffraction,
zeta
potential,
transmission
electron
microscopy,
field
emission
scanning
Fourier
transform
infrared
spectroscopy.
Melamine,
rich
in
–NH2
groups,
interacts
with
biopolyphenols
extract
through
hydrogen
bonding.
interaction
inhibits
formation
nanoparticles,
resulting
noticeable
colorimetric
response.
data
obtained
confirmed
standard
spectrophotometer
validated
high-performance
liquid
chromatography
technique.
limit
detection
achieved
this
scheme
was
quite
low,
falling
below
permissible
levels
recommended
government
bodies,
e.g.,
Food
Safety
Standards
Authority
India
(FSSAI).
The Analyst,
Год журнала:
2024,
Номер
149(4), С. 1151 - 1159
Опубликована: Янв. 1, 2024
A
GO/Au
NP
cellulose
substrate
was
constructed
through
layer-by-layer
assembly
of
graphene
oxide
and
Au
nanoparticles
on
a
mixed
membrane.
Surface-enhanced
Raman
spectroscopy
detection
3
pesticides
in
chrysanthemum
demonstrated.
