Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 1, 2025
Abstract
A
low‐cost,
high‐precision,
and
secure
real‐time
system
for
monitoring
food
freshness
can
significantly
improve
spoilage
issues,
yet
traditional
colorimetric
sensor
arrays
often
suffer
from
chemical
dyes’
high
toxicity
limited
color
changes.
Here,
a
metal‐polyphenol
network
array
(MPN‐CSA)
is
built
detecting
total
volatile
base
nitrogen
(TVB‐N)
markers
of
meat
freshness.
The
multi‐level
competitive
coordination
process
between
the
amine
substances
endows
with
changes
far
beyond
those
dyes
(reaching
detection
limit
300
ppb).
By
integrating
convolutional
neural
(CNN)
technology,
an
online
platform
developed
freshness,
achieving
overall
accuracy
rate
99.83%.
This
environmentally
friendly,
economically
viable
MPN‐CSA
that
monitors
in
complex
storage
environments
be
incorporated
into
packaging
boxes,
enabling
consumers
suppliers
to
assess
real‐time,
thus
helping
reduce
waste
prevent
foodborne
illnesses.
Centrifugal
microfluidics,
with
its
advantages
of
rapid
and
precise
fluid
control
without
the
need
for
external
pressure,
is
widely
applied
in
point-of-care
testing.
Critical Reviews in Analytical Chemistry,
Год журнала:
2025,
Номер
unknown, С. 1 - 21
Опубликована: Фев. 19, 2025
Manganese
is
an
essential
metal
ion
involved
in
various
biological
and
environmental
processes,
but
its
excess
can
lead
to
toxicity,
particularly
affecting
the
nervous
system.
Therefore,
developing
selective
sensitive
detection
methods
for
Mn2+
ions
of
paramount
importance.
Colorimetric
fluorimetric
chemosensors
have
emerged
as
promising
tools
due
their
simplicity,
cost-effectiveness,
real-time
monitoring
capabilities.
This
review
discusses
recent
advances
colorimetric
that
exhibit
distinct
color
or
fluorescence
changes
upon
interaction
with
ions.
The
explores
different
organic
nanomaterials,
focusing
on
mechanisms
sensing,
sensitivity,
selectivity,
practical
applications
monitoring,
healthcare,
food
safety.
article
also
provides
insights
into
future
research
directions
aimed
at
overcoming
these
challenges,
improving
chemosensor
performance,
expanding
applicability
diverse
real-world
scenarios.
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 16, 2024
Abstract
Detection
of
colorimetric
signals
is
commonly
used
in
various
analytical
methods
and
for
testing
non‐laboratory
resource‐limited
settings.
The
performance
assays
largely
based
on
nanoparticles
their
unique
optical
properties.
Multifunctional
combining
enzyme‐like
catalytic
properties—known
as
nanozymes—hold
great
promise
applications
signal‐generating
labels.
However,
the
extensive
focus
properties
leaves
overlooked.
In
this
article,
use
nanozymes
reviewed
relying
inherent
nanozymes,
detection
a
catalytically‐formed
product,
changes
caused
by
product.
impact
extinction
coefficient
reaction
products,
well
kinetic
parameters
sensitivity
limit
assays,
are
quantitatively
evaluated.
Finally,
existing
limitations
prospects
biosensors
summarized.
ACS Applied Nano Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 11, 2025
Constructing
nanozyme-based
single
atoms
with
exposed
metal-Nx
catalytic
sites
for
alendronate
sodium
(ALDS)
tablet
quality
control
is
a
complex
and
uncommon
task.
Herein,
we
presented
an
innovative
colorimetric
assay
to
detect
ALDS
utilizing
carbon-supported
Fe/Co
dual-atom
nanozymes
(Fe/CoSA-NCs)
derived
from
precursor
of
porphyrin
covalent
organic
frameworks
(COFs).
The
Fe/CoSA-NC
nanozymes,
featuring
Fe–N5
active
site
electronic
interactions
between
Fe
Co,
exhibited
enhanced
peroxidase-like
activity.
Experimental
findings
theoretical
calculations
elucidated
that
the
superior
activity
Fe/CoSA-NCs
stemmed
synergistic
effect
dual
atoms,
which
boosted
substrate
adsorption
reduced
reaction
barrier.
When
integrated
Fe/CoSA-NCs,
could
be
inhibited
due
ALDS-Fe3+
coordination.
Leveraging
this
mechanism,
rapid
selective
method
was
developed
detecting
ALDS.
sensor
showed
detection
limit
0.96
μM
in
phosphate
buffer,
surpassing
traditional
techniques
terms
efficiency,
accuracy,
simplicity.
Moreover,
system
successfully
utilized
pharmaceutical
determine
urine
samples.
This
work
opens
powerful
avenue
developing
efficient
COFs
expands
potential
applications
nanozyme
clinical
pharmacy.
Optical
sensors
based
on
nanozymes
have
shown
great
promise
for
the
rapid
and
sensitive
detection
of
pesticide
residues
in
environmental
food
samples.
However,
their
applicability
is
often
limited
by
a
lack
selectivity
due
to
nonspecific
enzyme
inhibition.
Therefore,
we
developed
colorimetric
sensing
platform
specifically
tailored
detect
agricultural
fungicide
thiophanate-methyl
(TpM),
leveraging
its
unique
inhibitory
effect
nanozyme
activity.
The
symmetric
ethylenediamine-
bisthiourea-like
groups
TpM
exhibit
strong
affinity
metal
sites,
leading
reduction
catalytic
performance.
Thus,
designed
novel
copper
oxide
nanosphere
(CuO)-derived
2D
phenolic
nanosheet
(2D-CuPNS)
with
enhanced
peroxidase-like
This
facilitates
oxidation
TMB
through
OH
radical
generation
via
Fenton-like
reaction
involving
Cu2+/Cu+
-C═C-
bonds
surface.
Notably,
activity
2D-CuPNS
was
selectively
significantly
inhibited
specific
interaction
while
remaining
unaffected
other
pesticides.
exhibited
affinities
H2O2,
Km
values
0.07
2.0
mM,
respectively.
As
result,
proposed
sensor
demonstrated
high
specificity
detection,
linear
range
0.5-15
μM
low
limit
0.09
μM.
A
smartphone-assisted
method
also
utilizing
RGB
from
chromogenic
reaction.
Furthermore,
immobilization
substrate
onto
standard
filter
paper,
ready-to-use
paper-based
were
created.
study
introduces
inhibition
approach
selective
samples,
providing
versatile
practical
solution.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(21), С. 10491 - 10522
Опубликована: Янв. 1, 2024
Monitoring
the
health
conditions
of
environment
and
humans
is
essential
for
ensuring
human
well-being,
promoting
global
health,
achieving
sustainability.
Innovative
biosensors
are
crucial
in
accurately
monitoring
conditions,
uncovering
hidden
connections
between
understanding
how
environmental
factors
trigger
autoimmune
diseases,
neurodegenerative
infectious
diseases.
This
review
evaluates
use
nanoplasmonic
that
can
monitor
diseases
according
to
target
analytes
different
sizes
scales,
providing
valuable
insights
preventive
medicine.
We
begin
by
explaining
fundamental
principles
mechanisms
biosensors.
investigate
potential
techniques
detecting
various
biological
molecules,
extracellular
vesicles
(EVs),
pathogens,
cells.
also
explore
possibility
wearable
physiological
network
healthy
connectivity
humans,
animals,
plants,
organisms.
will
guide
design
next-generation
advance
sustainable
healthcare
environment,
planet.
