Analytical Methods,
Journal Year:
2023,
Volume and Issue:
15(37), P. 4851 - 4861
Published: Jan. 1, 2023
Substrate
materials
with
high
sensitivity
and
storage
stability
are
crucial
for
the
practical
analytical
application
of
surface-enhanced
Raman
scattering
(SERS)
techniques.
In
this
work,
a
SERS-active
substrate
(Si/Au@Ag/ZIF-67)
was
fabricated
metal-organic
framework
(ZIF-67)
on
plasmonic
surface
(Si/Au@Ag)
via
self-assembly.
The
as-prepared
material
combined
properties
abundant
hotspots
Au@Ag
nanoparticles
excellent
adsorption
performance
ZIF-67
organic
molecules.
synergy
leads
to
composite
low
detection
limit
4-aminothiophenol
(a
typical
reporter
molecule)
down
2.0
×
10-9
M
enhancement
factor
(AEF)
SERS
is
3.4
106.
Moreover,
substrates
exhibited
good
repeatability,
reproducibility,
reliable
due
MOF
coating.
signal
stable
after
60
days
at
room
temperature.
Ultimately,
optimal
Si/Au@Ag/ZIF-67
applied
as
sensor
analyze
thiram,
results
showed
linear
concentration
range
from
10-7
10-5
linearity
(R2
=
0.9934).
recoveries
thiram
in
spiked
apple
juice
were
95.7-102.3%,
relative
standard
deviations
less
than
4.3%.
These
predict
that
proposed
may
hold
great
potential
environmental
food
pollution
applications.
Journal of Food Measurement & Characterization,
Journal Year:
2024,
Volume and Issue:
18(4), P. 2903 - 2915
Published: Feb. 26, 2024
Abstract
Despite
prohibition
in
many
countries,
malachite
green
(MG)
and
crystal
violet
(CV)
are
illegally
used
aquaculture,
endangering
both
human
health
the
environment.
Therefore,
it
is
crucial
to
develop
a
method
accurately
detect
MG
CV.
Surface-enhanced
Raman
spectroscopy
(SERS)
technology
based
on
noble
metal
materials
has
attracted
considerable
attention
for
detecting
food
contaminations.
However,
of
poor
stability
have
very
low
affinity
organic
molecules.
Herein,
this
study,
covalent
frameworks
(COFs)
modified
with
silver
nanoparticles
(Ag
NPs)
were
as
SERS
substrates
adsorption
detection
fungicides.
COFs
prepared
by
Schiff
base
reaction
1,3,5-tris
(4-aminophenyl)
benzene
(TAPB)
2,5-dimethoxybenzene-1,4-dicarboxaldehyde
(DMTA)
had
huge
specific
surface
area
could
provide
sufficient
sites
Ag
NPs
grown
not
only
generated
dense
“hot
spots”
but
also
improved
their
stability.
The
results
showed
that
COF@Ag
exhibited
high
enhancement
factor
(1.4
×
10
6
),
reproducibility
(RSD
=
6.18%),
good
within
50
days
8.88%).
Regression
analyses
ranges
0.0001–10.0
mg/L
0.0002–10.0
limits
(LOD)
standard
solutions
CV
3.8
−5
1.8
mg/L,
respectively.
Furthermore,
fish
samples,
significant
recoveries
90.83–107.91%
98.60–116.69%
achieved.
Hence,
hoped
work
expand
application
COF
trace
analyses.
Journal of environmental chemical engineering,
Journal Year:
2024,
Volume and Issue:
12(5), P. 113703 - 113703
Published: July 29, 2024
The
development
of
efficient
adsorbent
for
removing
excessive
nutrients
(e.g.
phosphorous
–
P)
and
antibiotics
tetracycline
hydrochloride
TC)
from
livestock
wastewater
is
necessary
but
challenging
in
practical
application.
In
this
study,
magnetic
Zr-based
metal-organic
frameworks
(Fe3O4/UiO-66)
with
interfacial
Fe-O-Zr
bonds
were
synthesized
then
modified
ethylenediamine
(EDA)
functional
groups.
resultant
optimized
composite,
namely
Fe3O4/UiO-66-N2,
showed
promising
removal
P
TC
both
single
binary
solution
systems.
It
exhibited
the
maximum
adsorption
capacities
90.0
mg
P/g
72.3
mg/g
component
solution,
respectively.
an
initial
concentration
5
P/L,
coexistence
posed
a
slight
inhibition
effect
on
over
Fe3O4/UiO-66-N2.
However,
was
increased
by
raising
P/L
to
20
P/L.
Fe3O4
nanoparticles
EDA
groups
suggested
jointly
improving
TC,
synergy
factors
1.1
1.8,
effects
reaction
time,
water
medium,
pH
coexisting
ions
investigated
detail.
mechanisms
governing
phosphate
included
electrostatic
attraction,
hydrogen
bonding,
ligand
exchange
complexation.
Those
contributing
Lewis
acid-base
interaction
π-π
electron-donor-acceptor
interaction,
addition
bonding
This
work
designed
novel
functionalized
MOF
composite
adsorbents
targeting
at
simultaneous
water,
under
synergistic
surface
Food Chemistry,
Journal Year:
2023,
Volume and Issue:
433, P. 137389 - 137389
Published: Sept. 3, 2023
A
new
type
of
durian-shaped
Fe3O4@Au@Ag@Au
(DFAAA)
multilayer
core-shell
composite
was
prepared
as
an
efficient
surface-enhanced
Raman
scattering
(SERS)
substrate.
The
optimization
process
and
SERS
enhancement
mechanism
the
substrate
were
further
explained
with
finite-difference
time-domain
simulation.
dense
uniform
spiny
array
on
DFAAA
surface
had
abundant
"hot
spots",
greatly
improving
sensitivity,
uniformity
reproducibility,
a
factor
3.01
×
107
storage-life
30
d.
"flow
magnetic
detection
method"
proposed
to
realize
rapid
flexible
pesticide
residues
different
foods
including
fish
apple.
limit
malachite
green
thiram
apple
surfaces
0.13
0.18
ng/cm2,
respectively.
With
its
high
performance
good
magnetic,
possessed
great
application
prospects
facile
for
non-destructive
trace
foods.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(1), P. 11 - 31
Published: Jan. 2, 2024
As
a
promising
spectroscopic
technique,
surface
enhanced
raman
spectroscopy
(SERS)
has
been
intensively
used
in
bio/chemical
sensing,
attributing
to
its
unique
advantages
of
ultrasensitive
and
accurate
detection
trace
amounts
analytes,
high
specific
fingerprint-like
features,
fast
response,
noninvasive
sensing.
The
robustness
consistency
SERS
signals
practical
analytical
applications
highly
rely
on
the
composition,
structural
morphology,
uniformity
substrates.
These
factors
play
pivotal
role
determining
intensity
reproducibility
detected
signals.
substrates
based
ordered
nanostructures
that
are
fabricated
from
anodic
aluminum
oxide
(AAO)-template-assisted
approaches
significant
interest
due
their
cost
effectiveness,
scalability,
precise
control,
exceptionally
features.
In
this
review,
recent
progress
with
sensitivity
prepared
AAO
templates
is
highlighted.
We
emphasize
optimization
strategies
toward
achieving
efficient
SERS-active
by
fine-tuning
size,
morphology
AAO-derived
nanostructures.
Furthermore,
we
delve
into
discussion
flexible
smart
substrates,
while
also
exploring
key
aspects
pertinent
further
amplifying
Overall,
review
aims
offer
insights
future
integration
technique
SERS,
providing
crucial
perspectives
for
forthcoming
research
field.
Biosensors,
Journal Year:
2024,
Volume and Issue:
14(2), P. 69 - 69
Published: Jan. 29, 2024
Dimethoate
contaminants
in
food
pose
a
threat
to
human
health.
Rapid
and
sensitive
trace
detection
methods
are
required
keep
safe.
In
this
study,
novel
fluorescent
aptasensor
was
developed
for
the
of
dimethoate
based
on
carbon
quantum
dots
labeled
with
double-stranded
DNA
(CQDs−apt−cDNA)
Ti3C2Tx
flakes.
Under
optimal
conditions,
showed
good
linear
range
1
×
10−9
5
10−5
M
coefficient
determination
(R2)
0.996.
Besides,
low
limit
2.18
10−10
obtained.
The
high
selectivity
interference
samples
reproducibility
an
RSD
3.06%
(<5%)
detection.
Furthermore,
proposed
applied
apple
juice
tap
water
satisfactory
recoveries
from
96.2
104.4%.
Because
these
benefits,
has
potential
promise
detecting
industry.
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(25), P. 30643 - 30652
Published: June 14, 2023
In
this
work,
a
boronate
affinity-functionalized
hierarchical
mesoporous
metal–organic
framework
adsorbent
with
sites
only
in
the
small
mesopore
has
been
structured
based
on
UiO-66@Fe3O4.
The
introduction
of
large
mesopores
can
promote
diffusion
cis-diol-containing
compounds
(cis-diols)
into
channels,
and
removal
adsorption
external
surface
materials
enhance
size-exclusion
effect
adsorbent.
addition,
faster
kinetics
excellent
selectivity
to
cis-diols.
Finally,
magnetic
dispersive
solid-phase
extraction
coupled
high-performance
liquid
chromatography
was
established
for
enrichment
detection
nucleotides
plasma.
Four
achieve
recoveries
from
93.25
118.79%,
limits
0.35
1.26
ng·mL–1,
intra-day
inter-day
relative
standard
deviations
less
than
10.2%.
conclusion,
method
be
directly
used
cis-diol
targets
complex
biological
samples
without
protein
precipitation
prior
extraction.
