A novel template-free and one-step method to fabricate hollow mesoporous structured upconversion luminescent NaYF4: Yb3+, Er3+ nanoparticles

作者：Liang, Xuhua; Hu, Yahong; Ma, Xuan; Wang, Yongbo; Fan, Jun^*; Hu, Xiaoyun

来源：Materials Letters, 2014, 129: 107-110.

DOI：10.1016/j.matlet.2014.05.049

• Biomaterials
• Template-free
• Hollow mesoporous structure
• Nanoparticles
• Ostwald ripening

This work reports a novel, template-free, and one-step synthesis method to fabricate hollow mesoporous structured upconversion fluorescent NaYF4: Yb3+, Er3+ nanoparticles with controllable size. The as-prepared samples, which possessed good uniformity and monodispersity, exhibited excellent upconversion fluorescent under 980 nm IR laser excitation. The effects of various reaction conditions on the morphology and size were investigated in detail and Ostwald ripening effect was regarded as the formation mechanism. The circular voids and mesoporous shell of the nanoparticles suggested the potential use in drug delivery. Furthermore, the polyethyleneimine on the surface of the nanoparticles endowed this material with good biocompatibility and provided functional groups to bond with specific ligand molecules. Thus, the hollow mesoporous structured upconversion luminescent NaYF4: Yb3+, Er3+ nanoparticles will be useful in simultaneous targeted drug delivery and cell imaging.

• 出版日期2014-8-15
• 单位西北大学