NaYF4:Yb/Tm/Er upconversion nanoparticle
Delivery StrategyThe NaYF4:Yb/Tm/Er upconversion nanoparticle is a light-responsive siRNA delivery nanocarrier reported for near-infrared-controlled gene silencing. In the described system, NaYF4:Yb/Tm/Er upconversion converts NIR irradiation into UV emission that induces azobenzene photoisomerization and triggers controlled siRNA release.