Silica-coated LiYF4:Yb3+, Tm3+ upconverting nanoparticles are non-toxic and activate minor stress responses in mammalian cells

二氧化硅包覆的LiYF4:Yb3+,Tm3+上转换纳米粒子无毒，且仅能激活哺乳动物细胞的轻微应激反应。