Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(13)
Published: Jan. 19, 2024
Abstract
The
design
and
development
of
ultra‐accurate
probe
is
great
significance
to
chemical
sensing
in
complex
practical
scenarios.
Here,
a
self‐accelerating
naphthalimide‐based
with
fast
response
high
sensitivity
toward
hydrogen
peroxide
(H
2
O
)
designed.
By
coupling
the
specially
selected
upconversion
nanoparticles
(UCNPs),
an
colorimetric‐fluorescent‐upconversion
luminescence
(UCL)
tri‐mode
platform
constructed.
Owing
promoted
reaction
process,
this
demonstrates
rapid
(<
1
s),
ultra‐low
detection
limit
(4.34
nM),
superb
anti‐interferent
ability
even
presence
>
21
types
oxidants,
explosives,
metallic
salts,
daily
compounds,
colorful
or
fluorescent
substances.
In
addition,
effectiveness
further
verified
by
sponge‐based
chip
loaded
UCNPs/probe
recognizing
trace
H
vapor
from
interferents
three
characteristic
colors
existing
simultaneously.
proposed
visualization
expected
open
up
brand‐new
methodology
for
sensing.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 3, 2024
Abstract
Recoverable
and
humidity‐tolerant
colorimetric
sensors
are
extremely
difficult
to
overcome.
In
this
work,
a
composite
hydrogel
sensor
based
on
chelation
reaction
is
proposed
for
the
first
time
achieve
ultra‐fast
recovery
ultra‐low
detection
limit
(LOD)
of
H
2
S
sensing.
The
constructed
by
polyvinyl
alcohol/boric
acid/Pb
2+
(PVA/Bn/Pb)
sensing
layer
polyacrylamide/sodium
alginate
(PAM/SA)
adsorption
layer.
change
from
white
brown
achieved
in
can
be
restored
when
placed
air.
response/recovery
mechanism
explained
transfer
Pb
between
hydrogels
formation
an
“Alginate‐Pb
”
with
egg‐box
structure
during
process.
multimodal
fusion
deep
neural
network
(MF‐DNN)
overcome
error
caused
aging.
Due
excellent
loading
diffusion
function
provided
3D
hydrogel,
has
broad
range
0.2–100
ppm,
10s/32s,
theoretical
LOD
0.026
ppm.
A
smartphone‐based
system
developed
enable
non‐invasive
halitosis
diagnosis,
egg
freshness
detection,
remote
monitoring
alarming.
recoverable,
humidity‐tolerant,
capable
ultrafast
widely
applicable.
This
work
provides
inspiration
recoverable
gas
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(10), P. 11739 - 11748
Published: May 15, 2024
Hydrogen
sulfide
(H2S),
a
crucial
endogenous
gasotransmitter,
plays
significant
role
in
monitoring
pathological
and
physiological
processes
as
well
the
realm
of
food
safety
control.
The
detection
H2S
poses
numerous
challenges
due
to
complexity
biological
fluids
samples
high
demands
for
biocompatible
probe
molecules.
To
address
these
challenges,
we
have
developed
an
innovative
silica
nanoparticle-based
Förster
resonance
energy
transfer
(FRET)
system
with
pyrene
(Py)
pyronine
(Pyr)
embedded
donors
acceptors
(Pyr@Py-SiO2
NPs).
This
not
only
enhances
biocompatibility
fluorescent
probes
but
also
effectively
mitigates
interference
from
complex
through
its
dual-mode
FRET
response.
Our
study
reveals
that
units
within
nanoparticles
facilitate
efficient
transfer,
enabling
both
colorimetric
ratiometric
optical
H2S.
approach
is
highly
sensitive
(detection
limit
71.5
nM),
rapid
(response
time
≤10
s),
uninfluenced
by
common
anions
thiols.
Moreover,
successfully
applied
this
various
practical
scenarios,
including
human
urine,
onion
slices,
spoilage.
work
provides
effective
method
systems
real-world
samples.
Endogenous
hydrogen
sulfide
(H2S)
is
a
crucial
biological
signaling
molecule
in
the
mammals.
Numerous
H2S
sensing
methods
have
been
developed,
yet
there
remains
an
urgent
need
for
portable,
online
and
sensitive
detection
of
complex
samples.
Herein,
ratiometric
fluorescent
optical
fiber
sensor
was
designed
ultrasensitive,
H2S,
using
nanohybrids
electrostatically
self-assembled
from
silicon
quantum
dots
gold
nanoclusters
(AuNCs@SiQDs
nanohybrids).
The
nanohybrids,
acting
as
probe,
exhibited
specific
response
to
H2S.
mechanism
involved
static
quenching
effect
on
AuNCs
fluorescence
resonance
energy
transfer
between
SiQDs
AuNCs.
showed
good
linear
concentration
0.01
~
100
μM,
with
ultralow
limit
4.33
nM.
also
successfully
employed
rapid
real
serum
samples,
without
tedious
preprocessing.
This
approach
offers
portable
efficient
technique
on-line
ultrasensitive
measurement
well
determination
H2S-mediated
biomolecules.
method
boasts
high
sensitivity
selectivity,
strong
anti-interference
capability,
portability,
practicality,
ease
production,
making
it
significant
disease
research
emergency
analysis.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 24, 2025
Abstract
Hydrogen
sulfide
(H
2
S)
is
a
vital
gaseous
signaling
molecule
that
plays
central
role
in
various
physiological
and
pathological
processes.
Given
the
complementary
advantages
of
fluorescence
(FL)
photoacoustic
(PA)
imaging,
there
growing
demand
for
dual‐ratiometric
probes
enable
precise
vivo
monitoring
H
S
levels.
In
this
study,
use
2‐mercapto‐1,3,4‐thiadiazole
(MTD)
as
novel
recognition
group
presented
first
time,
following
conjugation
with
cyanine
dyes
to
obtain
new
PA
probe
Cy‐MTD.
To
achieve
Cy‐MTD
incorporated
into
down‐conversion
nanoparticle
(DCNP),
resulting
creation
pioneering
NIR‐II
FL/NIR‐I
nanoprobe
DCNP@Cy‐MTD.
undergoes
blueshift
absorption
from
840
670
nm
after
reaction
S,
enabling
NIR‐I
ratiometric
imaging
by
measuring
ratio
signal
at
(PA
/PA
).
addition,
due
strong
≈840
overlapping
between
spectrum
808
excitation
band
DCNP,
nm‐excited
FL
emission
(F
1550
nm,808Ex
)
DCNP
DCNP@Cy‐MTD
quenched
through
competitive
absorption,
while
it
restored
upon
interaction
because
Using
stable
under
980
nm,980Ex
reference
signal,
/F
achieved.
The
response
features
offer
significant
advancement
over
traditional
single‐signal
or
single‐modality
techniques.
By
providing
enhanced
accuracy
reliability,
allows
diagnosis
hepatitis
surpassing
capabilities
conventional
histopathological
methods,
which
provides
way
more
effective
diagnostic
strategies
liver
diseases.
