Advanced Materials,
Год журнала:
2023,
Номер
35(36)
Опубликована: Июль 21, 2023
Abstract
Luminescence
(nano)thermometry
is
a
remote
sensing
technique
that
relies
on
the
temperature
dependency
of
luminescence
features
(e.g.,
bandshape,
peak
energy
or
intensity,
and
excited
state
lifetimes
risetimes)
phosphor
to
measure
temperature.
This
provides
precise
thermal
readouts
with
superior
spatial
resolution
in
short
acquisition
times.
Although
thermometry
just
starting
become
more
mature
subject,
it
exhibits
enormous
potential
several
areas,
e.g.,
optoelectronics,
photonics,
micro‐
nanofluidics,
nanomedicine.
work
reviews
latest
trends
field,
including
establishment
comprehensive
theoretical
background
standardized
practices.
The
reliability,
repeatability,
reproducibility
are
also
discussed,
along
use
multiparametric
analysis
artificial‐intelligence
algorithms
enhance
readouts.
In
addition,
examples
provided
underscore
challenges
faces,
alongside
need
for
continuous
search
design
new
materials,
experimental
techniques,
procedures
improve
competitiveness,
accessibility,
popularity
technology
Nano Letters,
Год журнала:
2022,
Номер
22(17), С. 7042 - 7048
Опубликована: Июль 14, 2022
Thermal
activation
of
upconversion
luminescence
in
nanocrystals
opens
up
new
opportunities
biotechnology
and
nanophotonics.
However,
it
remains
a
daunting
challenge
to
achieve
smart
control
behavior
the
thermal
field
with
remarkable
enhancement
ultrahigh
sensitivity.
Moreover,
physical
picture
involved
is
also
debatable.
Here
we
report
novel
mechanistic
design
realize
an
ultrasensitive
thermally
activated
erbium
sublattice
core-shell
nanostructure.
By
enabling
thermosensitive
property
into
intermediate
4I11/2
level
Er3+
through
energy-migration-mediated
surface
interaction,
upconverted
was
markedly
enhanced
together
striking
thermochromic
feature
under
1530
nm
irradiation.
Importantly,
use
non
coupled
red
green
emissions
contributes
sensitivity
5.27%
K-1,
3
times
higher
than
that
obtained
by
using
conventional
emissions.
We
further
demonstrate
controllable
interaction
general
approach
for
series
lanthanide-based
nanomaterials.
Our
findings
pave
way
development
luminescent
materials
toward
emerging
applications
such
as
noncontact
nanothermometry,
information
security,
anticounterfeiting.
Advanced Materials,
Год журнала:
2023,
Номер
35(44)
Опубликована: Авг. 21, 2023
Abstract
Fluorescence
thermometry
has
been
propelled
to
the
forefront
of
scientific
attention
due
its
high
spatial
resolution
and
remote
non‐invasive
detection.
However,
recent
generations
thermometers
still
suffer
from
limited
thermal
sensitivity
(
S
r
)
below
10%
change
per
Kelvin.
Herein,
this
work
presents
an
ideal
temperature‐responsive
fluorescence
material
through
Te
4+
‐doped
0D
Cs
2
ScCl
5
·H
O,
in
which
isolated
polyhedrons
endow
highly
localized
electronic
structures,
strong
electron–phonon
coupling
facilitates
formation
self‐trapped
excitons
(STEs).
With
rising
temperature,
dramatic
asymmetric
expansion
soft
lattice
induces
increased
defects,
exciton–phonon
coupling,
low
activation
energy,
evokes
a
rapid
de‐trapping
process
STEs,
enabling
several
orders
magnitude
changes
lifetime
over
narrow
temperature
range.
After
regulating
with
different
doping,
record‐high
(27.36%
K
−1
lifetime‐based
detection
is
achieved
at
325
K.
The
robust
stability
against
multiple
heating/cooling
cycles
long‐term
measurements
enables
uncertainty
0.067
Further,
developed
are
demonstrated
for
local
monitoring
operating
on
internal
components.
It
believed
that
constitutes
solid
step
towards
building
next
generation
ultrasensitive
based
low‐dimensional
metal
halides.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Март 15, 2024
Abstract
Nanothermometers
enable
the
detection
of
temperature
changes
at
microscopic
scale,
which
is
crucial
for
elucidating
biological
mechanisms
and
guiding
treatment
strategies.
However,
monitoring
micron-scale
structures
in
vivo
using
luminescent
nanothermometers
remains
challenging,
primarily
due
to
severe
scattering
effect
tissue
that
compromises
imaging
resolution.
Herein,
a
lanthanide
luminescence
nanothermometer
with
working
wavelength
beyond
1500
nm
developed
achieve
high-resolution
vivo.
The
energy
transfer
between
ions
(Er
3+
Yb
)
H
2
O
molecules,
called
environment
quenching
assisted
downshifting
process,
utilized
establish
temperature-sensitive
emissions
1550
980
nm.
Using
an
optimized
thin
active
shell
doped
ions,
nanothermometer’s
thermal
sensitivity
emission
intensity
are
enhanced
by
modulating
process.
Consequently,
minimally
invasive
cerebrovascular
system
mice
resolution
nearly
200
μm
achieved
nanothermometer.
This
work
points
method
micron-level
vivo,
potentially
giving
insights
into
research
sensing,
disease
diagnosis,
development.