Abstract
Thermal
quenching
of
luminescence
materials
poses
a
major
obstacle
to
the
technological
application
thermometry.
It
still
remains
challenging
attain
thermally
enhanced
light
emissions,
especially
in
second
near‐infrared
window
(NIR‐II).
Herein,
an
anomalous
thermal
dependence
NIR‐II
negative
expansion
(NTE)
Sc
2
Mo
3
O
12
:Er
3+
/Ho
nanocrystals
is
reported.
Mechanistic
investigations
affirm
that
Ho
ion
can
work
as
energy
reservoir
and
back‐transfer
Er
with
assistance
lattice
phonon
at
elevated
temperatures.
Moreover,
‐mediated
feedback
strengthened
by
contraction
between
dopant
ions,
thereby
enabling
remarkable
enhancement
emission
over
11‐fold.
The
opposite
response
emissions
harnessed
for
ratiometric
thermometry,
registering
exceptional
performance
high‐temperature
regime
(
S
r
=
1.71%
K
−1
,
δT
0.2
513
K).
These
findings
may
inspire
new
insights
addressing
luminescence,
which
also
raises
exciting
opportunities
flexible
thermometry
complex
settings.
Dalton Transactions,
Journal Year:
2023,
Volume and Issue:
53(2), P. 798 - 807
Published: Dec. 1, 2023
SWO:Tb/Eu
phosphors
with
negative
thermal
expansion
demonstrate
simultaneous
luminescent
color
tuning
and
optical
temperature
sensor
implementation.
Water
molecules
bring
about
a
change
in
behavior
energy
transfer
efficiency.
ACS Sensors,
Journal Year:
2024,
Volume and Issue:
9(3), P. 1049 - 1064
Published: March 14, 2024
The
development
of
efficient
nanoscale
photon
absorbers,
such
as
plasmonic
or
high-index
dielectric
nanostructures,
allows
the
remotely
controlled
release
heat
on
using
light.
These
photothermal
nanomaterials
have
found
applications
in
various
research
and
technological
fields,
ranging
from
materials
science
to
biology.
However,
measuring
thermal
fields
remains
an
open
challenge,
hindering
full
comprehension
control
phenomena.
Here,
we
review
discuss
existent
thermometries
suitable
for
single
nanoparticles
heated
under
illumination.
methods
are
classified
four
categories
according
region
where
they
assess
temperature:
(1)
average
temperature
within
a
diffraction-limited
volume,
(2)
at
immediate
vicinity
nanoparticle
surface,
(3)
itself,
(4)
map
around
with
spatial
resolution.
In
latter,
because
it
is
most
challenging
informative
type
method,
also
envisage
new
combinations
technologies
that
could
be
helpful
retrieving
maps.
Finally,
analyze
provide
examples
strategies
validate
results
obtained
different
thermometry
methods.
Abstract
Thermal
quenching
of
luminescence
materials
poses
a
major
obstacle
to
the
technological
application
thermometry.
It
still
remains
challenging
attain
thermally
enhanced
light
emissions,
especially
in
second
near‐infrared
window
(NIR‐II).
Herein,
an
anomalous
thermal
dependence
NIR‐II
negative
expansion
(NTE)
Sc
2
Mo
3
O
12
:Er
3+
/Ho
nanocrystals
is
reported.
Mechanistic
investigations
affirm
that
Ho
ion
can
work
as
energy
reservoir
and
back‐transfer
Er
with
assistance
lattice
phonon
at
elevated
temperatures.
Moreover,
‐mediated
feedback
strengthened
by
contraction
between
dopant
ions,
thereby
enabling
remarkable
enhancement
emission
over
11‐fold.
The
opposite
response
emissions
harnessed
for
ratiometric
thermometry,
registering
exceptional
performance
high‐temperature
regime
(
S
r
=
1.71%
K
−1
,
δT
0.2
513
K).
These
findings
may
inspire
new
insights
addressing
luminescence,
which
also
raises
exciting
opportunities
flexible
thermometry
complex
settings.
