Abstract
Near‐infrared
mechanoluminescent
(NIR
ML)
materials
have
attracted
attention
due
to
their
advantages,
such
as
in
situ
and
real‐time
monitoring
of
biomechanical
information
vivo.
However,
most
ML
are
focused
on
the
UV–vis
light
range,
which
limits
potential
applications
biological
field.
In
this
work,
a
broadband
NIR
material
Ca
2
YGa
3
Ge
O
12
:
0.10Cr
3+
(CYGGG:
)
is
successfully
prepared
by
chemical
co‐substitution
Cr
heavy
doping.
Density
functional
theory
(DFT)
calculations
used
determine
type
defects
material,
composite
formed
interstitial
oxygen
(i
′′)
antisite
(Ca
Y
′
‐
°)
mostly
dominate
ML.
ions
act
electronic
bridges
regulate
energy
levels,
becoming
key
turning
Nd
ion's
Finally,
based
excellent
properties
CYGGG:
,
0.01Nd
composites
can
penetrate
pork
tissues
different
compositions/thicknesses
under
stress
loads.
Potentially,
work
tries
realize
tissue
imaging,
providing
new
way
for
application
materials.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(27), P. 35279 - 35292
Published: June 27, 2024
Mechanoluminescence
(ML)
is
the
nonthermal
luminescence
generated
in
process
of
force-to-light
conversion,
which
has
broad
prospects
stress
sensing,
wearable
devices,
biomechanics,
and
multiple
information
anticounterfeiting.
Multivalence
emitter
ions
utilize
their
own
self-reduction
to
realize
multiband
ML
without
introducing
another
dopant,
such
as
Eu3+/Eu2+,
Sm3+/Sm2+,
Mn4+/Mn2+.
However,
self-reduction-induced
bismuth-activated
materials
rarely
been
reported
so
far.
In
this
work,
a
novel
visible-to-near-infrared
(vis-NIR)
induced
by
Bi3+
Bi2+
spinel-type
compound
(MgGa2O4)
reported.
The
photoluminescence
(PL)
spectra,
PL
excitation
(PLE)
lifetime
curves
demonstrate
that
Bi3+/Bi2+
are
main
centers.
Notably,
possible
model
proposed,
where
magnesium
vacancy
(VMg″)
considered
driving
force
for
Bi2+.
Furthermore,
an
oxygen
(VO••)
confirmed
electron
paramagnetic
resonance
(EPR)
spectroscopy.
Combined
with
thermoluminescence
(TL)
glow
plausible
trap-controlled
mechanism
illustrated,
electron-hole
(VO••/VMg″)
pairs
play
significant
role
capturing
electrons
holes.
It
worth
noting
proof-of-concept
dual-mode
electronic
signature
application
implemented
based
on
flexible
film,
improves
capabilities
anticounterfeiting
high-level
security
applications.
Besides,
multistimulus-responsive
behaviors
film
realized
under
254
nm
UV
lamp,
thermal
disturbance,
980
laser,
mechanical
stimuli.
general,
study
provides
new
insights
into
designing
vis-NIR
toward
wider
possibilities.
Small,
Journal Year:
2024,
Volume and Issue:
20(25)
Published: Feb. 11, 2024
Abstract
Knee
replacement
surgery
confronts
challenges
including
patient
dissatisfaction
and
the
necessity
for
secondary
procedures.
A
key
requirement
lies
in
dual‐modal
measurement
of
force
temperature
artificial
joints
during
postoperative
monitoring.
Here,
a
novel
non‐toxic
near‐infrared
(NIR)
phosphor
Sr
3
Sn
2
O
7
:Nd,
Yb,
is
designed
to
realize
measurement.
The
strategy
entail
phonon‐assisted
upconversion
luminescence
(UCL)
trap‐controlled
mechanoluminescence
(ML)
single
well
within
NIR
biological
transmission
window.
embedded
medical
bone
cement
forming
smart
joint
total
knee
replacements
illustrated
as
proof‐of‐concept.
sensing
device
can
be
charged
vitro
by
commercial
X‐ray
source
with
safe
dose
rate
ML,
excited
low
power
980
nm
laser
UCL.
It
attains
impressive
capabilities,
exhibiting
resolution
0.5%
per
10
N,
detection
threshold
15
relative
sensitive
up
1.3%
K
−1
at
309
K.
stability
against
humidity
thermal
shock
together
robustness
are
attested.
This
work
introduces
methodological
paradigm,
paving
way
innovative
research
enhance
functionality
tissues
living
organisms.
Small,
Journal Year:
2024,
Volume and Issue:
20(45)
Published: Aug. 10, 2024
Mechanoluminescence
(ML)
phosphors
have
found
various
promising
utilizations
such
as
in
non-destructive
stress
sensing,
anti-counterfeiting,
and
bio
imaging.
However,
the
reported
NIR
MLs
predominantly
been
limited
to
bulky
particle
size
weak
ML
intensity,
hindering
further
practical
applications.
For
this
regard,
a
nano-sized
ZnGa
Advanced Optical Materials,
Journal Year:
2023,
Volume and Issue:
12(5)
Published: Oct. 5, 2023
Abstract
Multi‐mode
mechanoluminescence
(ML)
materials
are
have
applications
such
as
anti‐counterfeiting,
stress
sensing,
and
information
security.
There
is
limited
general
consensuses
on
the
luminescent
mechanisms,
even
though
exploring
ML
mechanism
based
defects
has
shown
significance
in
further
studies
both
design
application.
Here,
a
deep‐red
to
near‐infrared
(NIR)
material
reported
Mn
2+
‐activated
double
perovskite‐type
compound
(CaZnGe
2
O
6
:
).
The
abundant
lattice
sites
within
crystal
structure
enabled
doping
defects.
Two
different
photoluminescence
(PL)
emission
bands
peaked
at
536
676
nm
from
4
T
1
(
G)→
A
S)
observed,
which
attributed
substitution
of
Zn
Ca
by
,
respectively.
Hence,
tunable
emissions
green
red
realized
single
doping,
can
be
regulated
varying
concentration.
Electrons
holes
captured
cation
anion
vacancy
Zn,
ions),
followed
combination
carriers
transfer
energy
3d
states
produce
ML/persistent
luminescence
(PersL)
under
mechanical/thermal
stimuli.
Proof‐of‐concept
multi‐mode
temperature
X‐ray
imaging
fields
demonstrated.
These
results
will
deepen
understanding
‐doped
multi‐stimulus‐responsive
materials,
inspiring
development
more
high‐performance
phosphors
for
practical
applications.
Advanced Optical Materials,
Journal Year:
2023,
Volume and Issue:
12(11)
Published: Dec. 7, 2023
Phosphor‐converted
near‐infrared
(NIR)
LEDs
are
becoming
increasingly
demanded
as
miniature,
portability,
and
broad
emission
spectrum.
In
this
work,
a
class
of
Fe
3+
‐activated
double
perovskite
structured
is
reported
ALaBB′O
6
(A
=
Ba,
Sr,
Ca;
B–B′
Li–Te,
Mg–Sb)
phosphors.
Through
the
co‐substitution
strategy
at
A‐site
B‐B'
sites,
spectral
intensity
position
ions
can
be
tuned.
Finally,
by
utilizing
Ca
2+
Mg–Sb
for
long‐wave
NIR
centered
995
nm
in
CaLaMgSbO
:
0.6%Fe
with
full
width
half
maximum
147
internal
quantum
efficiency
54.05%
achieved.
The
effects
crystal
structure
on
photoluminescence
properties
comprehensively
analyzed.
fabricated
encapsulating
UV
chips
synthetic
phosphors,
their
application
value
night
vision,
nondestructive
biological
monitoring,
detection
evaluated.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
12(7), P. 2379 - 2390
Published: Jan. 1, 2024
The
realization
of
pressure-driven
dynamic
and
reversible
broadband-to-line
emission
switching
in
Cr
3+
-activated
pyroxenes
LiScSi
2
O
6
LiScGe
through
crystal
field
engineering.
Materials Horizons,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Near
infrared
mechanoluminescence
(NIR-ML)
materials
have
attracted
the
attention
of
researchers
due
to
their
unique
advantages,
such
as
high
resistance
bright-field
interference
and
higher
penetration
depth
into
biological
tissues.
However,
reported
NIR-ML
are
mainly
rare-ion-activated
narrow-band
emitters.
In
this
work,
we
report
a
material
BaGa12O19:Cr3+
by
solid
state
reaction
method.
Broad
NIR
ML
(650-1000
nm)
is
observed
at
lower
force
loads
(12
N),
which
based
on
Cr3+
ion's
multi-lattice
site
occupation.
After
heat
treatment
573
K
for
20
min,
still
maintains
84.4%
its
intensity.
Furthermore,
intensity
also
significantly
improved
after
UV
pre-irradiation.
Due
defective
piezoelectric
photonic
effect,
has
great
self-recoverable
properties
even
in
absence
sunlight
irradiation.
Finally,
rate
reached
66.97%
tissues,
suggests
potential
prospects
biostress
detection
towards
bio-imaging
applications.
