Nanoscale Horizons,
Год журнала:
2023,
Номер
8(8), С. 991 - 1013
Опубликована: Янв. 1, 2023
When
plasmonic
metal
nanoparticles
become
smaller
and
smaller,
a
new
class
of
nanomaterials—metal
nanoclusters
atomic
precision—comes
to
light,
recently
shape
control
at
the
level
for
functionality
has
an
attractive
topic.
Science,
Год журнала:
2024,
Номер
383(6680), С. 326 - 330
Опубликована: Янв. 18, 2024
Metal
nanoclusters
have
emerged
as
promising
near-infrared
(NIR)-emissive
materials,
but
their
room-temperature
photoluminescence
quantum
yield
(PLQY),
especially
in
solution,
is
often
low
(<10%).
We
studied
the
photophysics
of
Au
Intrinsic
dual-emission
(DE)
of
gold
nanoclusters
in
the
near-infrared
(NIR)
are
fascinating
for
fundamental
importance
and
practical
applications,
but
their
synthesis
remains
a
formidable
challenge
sophisticated
excited-state
processes
make
elucidating
DE
mechanisms
much
more
arduous.
Here,
we
report
an
all-alkynyl-protected
nanocluster,
Au20,
showing
prolate
Au12
tri-octahedral
kernel
surrounded
by
two
Au2(CZ-PrA)3
dimers,
four
Au(CZ-PrA)2
monomers,
CZ-PrA-
bridges.
Au20
exhibits
distinguished
photophysical
properties
including
NIR
at
820
940
nm,
microsecond
radiative
relaxation,
6.26%
photoluminescent
quantum
yield
ambient
environment
nondegassed
solution.
Combining
systematic
studies
on
steady/transient
spectroscopy
theoretical
calculation,
identified
triplet
charge
transfer
(CT)
states,
ligand-to-kernel
kernel-based
CT
states
as
origins.
Furthermore,
this
highly
independent
sensitive
response
to
surrounding
environments,
which
well
coincide
with
its
mechanism.
This
work
not
only
provides
substantial
structure
model
understand
distinctive
mechanism
also
motivates
further
development
materials.
Advanced Materials,
Год журнала:
2023,
Номер
36(8)
Опубликована: Ноя. 3, 2023
Abstract
Atomically
precise
gold
nanoclusters
(NCs)
have
emerged
as
a
new
class
of
precision
materials
and
attracted
wide
interest
in
recent
years.
One
the
unique
properties
such
pertains
to
their
photoluminescence
(PL),
for
it
can
widely
span
visible
near‐infrared–I
–II
wavelengths
(NIR‐I/II),
even
beyond
1700
nm
by
manipulating
size,
structure,
composition.
The
current
research
efforts
focus
on
structure–PL
correlation
development
strategies
raising
PL
quantum
yields,
which
is
nontrivial
when
moving
from
near‐infrared
wavelengths,
especially
NIR–II
regions.
This
review
summarizes
progress
field,
including
i)
types
observed
NCs
fluorescence,
phosphorescence,
thermally
activated
delayed
well
dual
emission;
ii)
some
effective
that
are
devised
improve
yield
(QY)
NCs,
heterometal
doping,
surface
rigidification,
core
phonon
engineering,
with
double‐digit
QYs
NIR
horizons;
iii)
applications
luminescent
bioimaging,
photosensitization,
optoelectronics.
Finally,
remaining
challenges
opportunities
future
highlighted.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Янв. 11, 2025
Abstract
Photoluminescence
is
one
of
the
most
intriguing
properties
metal
nanoclusters
derived
from
their
molecular-like
electronic
structure,
however,
achieving
high
photoluminescence
quantum
yield
(PLQY)
core-dictated
fluorescence
remains
a
formidable
challenge.
Here,
we
report
efficient
suppression
total
structural
vibrations
and
rotations,
management
pathways
rates
electron
transfer
dynamics
to
boost
near-unity
absolute
PLQY,
by
decorating
progressive
addition
cations.
Specifically,
with
sequential
Zn
2+
,
Ag
+
Tb
3+
into
3-mercaptopropionic
acids
capped
Au
(NCs),
low-frequency
vibration
core
progressively
decreases
144.0,
55.2
40.0
cm
−1
coupling
strength
electrons-high-frequency
related
surface
motifs
gradually
diminishes
40.2,
30.5
14.4
meV.
Moreover,
introducing
cation
additives
significantly
reduces
time
40,
27
12
ps
in
pathway
staple
core.
This
benefits
shrinkage
structure
that
speeds
up
shell-core
transition,
particular,
provides
hopping
platform
for
excited
electrons
as
intrinsic
ladder-like
energy
level
structure.
As
result,
it
allows
remarkable
enhancement
51.2%,
83.4%,
99.5%.
Advanced Materials,
Год журнала:
2023,
Номер
35(40)
Опубликована: Июль 29, 2023
Bacterial
keratitis
is
a
serious
ocular
disease
that
affects
millions
of
people
worldwide
each
year,
among
which
≈25%
are
caused
by
Staphylococcus
aureus.
With
the
spread
bacterial
resistance,
refractory
methicillin-resistant
S.
aureus
(MRSA)
≈120
000-190
000
annually
and
significant
cause
infectious
blindness.
Atomically
precise
gold
nanoclusters
(GNCs)
recently
emerged
as
promising
antibacterial
agents;
although
how
GNC
structure
capping
ligands
control
properties
remains
largely
unexplored.
In
this
study,
adjusting
ratio
"bulky"
thiol
fragrance
to
linear
zwitterionic
ligand,
conformation
transformed
from
Au25
(SR)18
Au23
(SR)16
species,
simultaneously
converting
both
inactive
into
potent
nanomaterials.
Surprisingly,
mixed-ligand
capped
GNCs
exhibit
superior
potency
compared
their
monoligand
counterparts.
The
optimal
highly
against
MRSA,
showing
>1024-fold
lower
minimum
inhibitory
concentration
than
corresponding
free
ligands.
Moreover,
it
displays
excellent
in
treating
MRSA-induced
mice
with
greatly
accelerated
corneal
recovery
(by
approximately
ninefold).
Thus,
study
establishes
feasible
method
synthesize
ligand
active
non-antibacterial
ligands,
thereby
increasing
repertoires
for
combating
multidrug-resistant
infections.
Materials Chemistry Frontiers,
Год журнала:
2023,
Номер
7(8), С. 1482 - 1495
Опубликована: Янв. 1, 2023
Alkynyl-protected
metal
nanoclusters
possess
unique
advantages,
and
the
recent
progress
on
controllable
synthesis
CO
2
electroreduction
application
is
discussed,
with
some
explicit
examples
to
elaborate
structure-performance
relationship.
Progress in Materials Science,
Год журнала:
2023,
Номер
142, С. 101229 - 101229
Опубликована: Дек. 12, 2023
Gold
nanomaterials
have
emerged
as
versatile
systems
which
hold
a
great
promise
for
several
biomedical
applications.
Among
them,
gold
nanoclusters
(AuNCs),
ultra-small
nanoparticles,
gained
attention
due
to
their
unique
optical
and
electronic
properties
arising
from
small
size,
quantum
confinement
effects,
surface
ligands.
Their
biocompatibility,
efficient
renal
clearance,
photoluminescence
(PL),
catalytic
activity
make
them
candidates
practical
applications,
such
bioimaging
therapy.
In
this
review,
we
devote
our
the
burgeoning
research
in
area
focusing
on
three
main
highly
intertwined
topics.
First,
present
different
methods
AuNC
synthesis
alongside
key
of
AuNCs
(magnetism,
PL).
This
is
followed
by
description
how
fine-tune
PL
property.
Lastly,
potential
applications
are
discussed
detail,
with
particular
focus
sensing,
bioimaging,
nanomedicine.
Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(10)
Опубликована: Фев. 27, 2024
Atomically
precise
control
over
anisotropic
nanoclusters
constitutes
a
grand
challenge
in
nanoscience.
In
this
work,
we
report
our
success
achieving
periodic
series
of
atomically
gold
quantum
rods
(abbrev.
Au
QRs)
with
unusual
excitonic
properties.
These
QRs
possess
hexagonal
close-packed
kernels
constant
three-atom
diameter
but
increasing
aspect
ratios
(ARs)
from
6.3
to
18.7,
all
being
protected
by
the
same
thiolate
(SR)
ligand.
The
are
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(14), С. 9631 - 9639
Опубликована: Март 26, 2024
The
induced
structural
transformation
provides
an
efficient
way
to
precisely
modulate
the
fine
structures
and
corresponding
performance
of
gold
nanoclusters,
thus
constituting
one
important
research
topics
in
cluster
chemistry.
However,
driving
forces
mechanisms
these
processes
are
still
ambiguous
many
cases,
limiting
further
applications.
In
this
work,
based
on
unique
coordination
mode
pincer
ligand-stabilized
nanocluster
Au8(PNP)4,
we
revealed
site-recognition
mechanism
for
transformations
nanoclusters.
"open
nitrogen
sites"
surface
interact
with
different
inducers
including
organic
compounds
metals
trigger
conversion
Au8(PNP)4
Au13
Au9Ag4
respectively.
Control
experiments
verified
mechanism,
femtosecond
nanosecond
transient
absorption
spectroscopy
electronic
photoluminescent
evolution
accompanied
by
transformation.