title: Elimination of photon quenching by a transition layer to fabricate a quenching-shield sandwich structure for 800 nm excited upconversion luminescence of Nd3+-sensitized nanoparticles.
abstract: Nd3+-sensitized quenching-shield sandwich-structured upconversion nanoparticles are reported, which exhibit highly efficient upconversion photoluminescence under excitation by an 800 nm continuous-wave laser. The transition-layer structure is essential to bridge energy transfer from the sensitizer to the activator and simultaneously block energy back-transfer from the activator to the sensitizer. These 800 nm-excited upconversion nanoparticles are a key step toward the development of upconversion nanophosphors for biological applications.
authors: Beijing National Laboratory for Molecular Science, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
authors: Yeteng
authors: Y
authors: Zhong
authors: Gan
authors: G
authors: Tian
authors: Zhanjun
authors: Z
authors: Gu
authors: Yijun
authors: Y
authors: Yang
authors: Lin
authors: L
authors: Gu
authors: Yuliang
authors: Y
authors: Zhao
authors: Ying
authors: Y
authors: Ma
authors: Jiannian
authors: J
authors: Yao
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis* / Q000528:radiation effects; D003460:Crystallization / Q000379:methods; D004735:Energy Transfer; D031541:Fluorescence Resonance Energy Transfer / Q000379:methods*; D008027:Light; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D009354:Neodymium / Q000737:chemistry* / Q000528:radiation effects*; D010316:Particle Size; D017785:Photons
chemical_list: D001672:Biocompatible Materials; D009354:Neodymium
keywords: excitation; quenching effects; quenching-shield sandwich structures; transition layers; upconversion