Advanced Materials Technologies,
Год журнала:
2024,
Номер
9(7)
Опубликована: Фев. 4, 2024
Abstract
Transferring
the
concept
of
chemical‐driven
responses
into
artificial
intelligence
technology
holds
key
to
mimicking
olfactory
for
neuromorphic
computing
chemical
recognition.
Currently,
systems
are
designed
based
on
sensor
arrays.
Time‐dependent
arrays
processed
by
neural
networks
However,
sensors
generate
instantly
volatile
responses,
and
algorithms
processing
time‐dependent
have
not
been
involved.
The
recognition
accuracy
speed
severely
impeded.
A
array
can
only
achieve
an
90%
after
at
least
5
training
epochs.
Herein
chemical‐resistant
synapse
consisting
3D
hierarchical
WO
3
@WO
nanofibers
demonstrated.
exhibit
persistent
resistance
through
exposures
due
strong
chemisorption
water
molecules.
Typical
synaptic
behaviors
including
paired‐pulse
facilitation,
long‐term
−1
short‐term
memory,
learning
experience
achieved.
Next,
a
recurrent
network
that
is
committed
data
used
identify
gas‐phase
chemicals
3‐hydroxy‐2‐butanone,
triethylamine,
trimethylamine.
Training‐free
gas
has
realized
nanofiber
only,
in
which
above
first
epoch.
results
great
potential
satisfy
stringent
performance
requirements
perception
systems.
JACS Au,
Год журнала:
2024,
Номер
4(2), С. 545 - 556
Опубликована: Янв. 23, 2024
The
exploration
of
emerging
functionalized
quantum
dots
(QDs)
through
modulating
the
effective
interaction
between
sensing
element
and
target
analyte
is
great
significance
for
high-performance
trace
sensing.
Here,
chromone-based
ligand
grafted
QDs
(QDs-Chromone)
were
initiated
to
realize
electronic
energy
transfer
(EET)
driven
specifically
by
ethylenediamine
(EDA)
in
absence
spectral
overlap.
fluorescent
colorimetric
dual-mode
responses
(from
red
blue
from
colorless
yellow,
respectively)
resulting
expanded
conjugated
ligands
reinforced
analytical
selectivity,
endowing
an
ultrasensitive
specific
response
submicromolar-liquid
EDA.
In
addition,
a
QDs-Chromone-based
chip
was
constructed
achieve
recognition
EDA
vapor
with
naked-eye
observed
at
concentration
as
low
10
ppm,
well
robust
anti-interfering
ability
complicated
scenarios
monitoring.
We
expect
proposed
EET
strategy
shaping
will
shine
light
on
both
rational
probe
design
methodology
deep
mechanism
exploration.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 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
The
precise
regulation
of
fluorophore
binding
sites
in
an
organic
probe
is
great
significance
toward
the
design
fluorescent
sensing
materials
with
specific
functions.
In
this
study,
a
fluorescence
properties
and
nitrite
detection
ability
designed
by
precisely
modulating
benzothiazole
sites.
Only
bond
at
ortho-position
aniline
moiety
can
specifically
recognize
nitrite,
which
ensures
that
reaction
products
displays
robust
green
emission.
unique
2-(2-amino-4-carboxyphenyl)
(ortho-BT)
shows
superior
performance,
including
low
limit
(2.2
fg),
rapid
time
(<5
s),
excellent
specificity
even
presence
>40
types
strong
redox
active,
colored
substances,
nitro
compounds,
metal
ions.
Moreover,
highly
applicable
for
on-site
semiquantitative
measurement
nitrite.
proposed
strategy
expected
to
start
new
frontier
exploration
methodology.
Analytical Chemistry,
Год журнала:
2022,
Номер
94(9), С. 3744 - 3748
Опубликована: Фев. 25, 2022
Nitrogen-rich
heterocyclic
compounds
(NRHCs)
are
an
emerging
type
of
explosive,
and
their
quantification
is
important
in
national
security
inspection
environmental
monitoring.
Up
until
now,
designing
efficient
NRHCs
sensing
strategy
was
still
the
early
stages.
Herein,
a
new
metal-organic
framework
(MOF)
with
aggregation-induced
emission
(AIE)
characteristics
synthesized
fluorometric/colorimetric
responses
for
rapid
selective
detection
NRHCs.
The
nonemissive
probe
designed
tetraphenylethylene
derivative
as
linker
Co
node,
quencher,
color-changing
agent.
Cobalt
AIE-MOF
exhibits
turn-on
enhancement
due
to
competitive
coordination
substitution
between
scaffold
well
following
AIE
process
liberative
linkers.
Meanwhile,
color
appearance
changes
from
blue
yellow
based
on
dissociation
original
coordinating
system.
Using
this
dual-mode
probe,
single-
dual-ring
successfully
detected
5
μM
7.5
mM
within
25
s.
cobalt
excellent
selectivity
against
variety
interferences,
providing
promising
tool
multichannel
strategy.
