Upconverting Nanoparticles Coated with Light-Breakable Mesoporous Silica for NIR-Triggered Release of Hydrophobic Molecules
Vivienne Tam,
Pierre Picchetti,
Yiwei Liu
et al.
Abstract:Upconverting
nanoparticles (UCNPs) doped with Yb3+ and
Tm3+ are near-infrared (NIR) to ultraviolet (UV) transducers
that can be used for NIR-controlled drug delivery. However, due to
the low quantum yield of upconversion, high laser powers and long
irradiation times are required to trigger this drug release. In this
work, we report the one-step synthesis of a nanocomposite consisting
of a LiYbF4:Tm3+@LiYF4 UCNP coated
with mesoporous UV-breakable organosilica shells of various thicknesses.
We demonstrate that … Show more
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