ACS ES&T Water,
Journal Year:
2023,
Volume and Issue:
3(8), P. 2318 - 2327
Published: June 7, 2023
Excessive
use
of
antibiotics
causes
their
residues
in
the
environment
and
food,
seriously
threatening
ecosystem
human
health.
Designing
a
portable
sensitive
sensor
for
on-site
analysis
is
therefore
high
demand.
In
this
study,
we
have
developed
smartphone-capable
hydrogel
colorimetric
platform
ultrasensitive
detection
kanamycin
(KAN)
based
on
aptamer-regulated
nanozyme
activity.
The
synthesized
Fe/CeO2
hexagonal
bipyramidal
microcrystals
(Fe/CeO2
HBs)
exhibited
excellent
peroxidase-like
activity,
but
it
could
be
obviously
inhibited
by
aptamer,
inhibition
effect
was
further
enhanced
with
specific
recognition
between
target
making
possible
to
design
facile
method
KAN
analysis.
Moreover,
aptamer-functionalized
HBs
HBs@Apt)
were
introduced
into
fabricate
analytical
tube,
whose
signal
read
out
smartphone
platform,
realizing
KAN.
linear
response
range
0.05–48.45
ng
mL–1
an
ultralow
limit
0.035
recovery
rate
ranging
from
99.57
103.76%
spiked
real
samples,
demonstrating
its
superior
accuracy
reliability.
This
work
provides
new
insights
designing
solid-phase
hydrogel-based
antibiotic
residues.
Analytical Chemistry,
Journal Year:
2024,
Volume and Issue:
96(21), P. 8705 - 8712
Published: May 8, 2024
Water
pollution
originating
from
heavy
metals
has
shown
great
impacts
on
the
ecological
environment
and
human
health
due
to
their
extremely
low
biodegradability.
Hexavalent
chromium
Cr(VI),
as
one
harmful
metal
with
strong
oxidation,
high
biological
permeability,
carcinogenicity,
is
becoming
an
increasingly
serious
threat
health.
Therefore,
conveniently
but
accurately,
monitoring
Cr(VI)
level
in
water
maintain
its
normal
ensuring
stability
of
ecosystem
become
very
valuable.
However,
most
these
sensors
reported
are
turn-off
type
single-emission
sensors.
In
this
work,
a
ratiometric
fluorescence/colorimetry/smartphone
triple-mode
turn-on
optical
sensor
for
was
developed
based
multifunctional
metal–organic
framework
platform.
The
detection
limits
three
mutual
verification
modes
were
only
1.28,
4.89,
68.4
nM,
respectively.
Additionally,
color
changes
system
under
sunlight
can
also
be
observed
directly
by
naked
eye.
accuracy
practicability
multimode
further
proved
actual
seawater
samples,
recovery
rate
ranged
97.308
104.041%.
ACS ES&T Water,
Journal Year:
2023,
Volume and Issue:
3(8), P. 2318 - 2327
Published: June 7, 2023
Excessive
use
of
antibiotics
causes
their
residues
in
the
environment
and
food,
seriously
threatening
ecosystem
human
health.
Designing
a
portable
sensitive
sensor
for
on-site
analysis
is
therefore
high
demand.
In
this
study,
we
have
developed
smartphone-capable
hydrogel
colorimetric
platform
ultrasensitive
detection
kanamycin
(KAN)
based
on
aptamer-regulated
nanozyme
activity.
The
synthesized
Fe/CeO2
hexagonal
bipyramidal
microcrystals
(Fe/CeO2
HBs)
exhibited
excellent
peroxidase-like
activity,
but
it
could
be
obviously
inhibited
by
aptamer,
inhibition
effect
was
further
enhanced
with
specific
recognition
between
target
making
possible
to
design
facile
method
KAN
analysis.
Moreover,
aptamer-functionalized
HBs
HBs@Apt)
were
introduced
into
fabricate
analytical
tube,
whose
signal
read
out
smartphone
platform,
realizing
KAN.
linear
response
range
0.05–48.45
ng
mL–1
an
ultralow
limit
0.035
recovery
rate
ranging
from
99.57
103.76%
spiked
real
samples,
demonstrating
its
superior
accuracy
reliability.
This
work
provides
new
insights
designing
solid-phase
hydrogel-based
antibiotic
residues.
