所属单位：材料科学工程学院

教研室：物理教研室

发表刊物：Materials Research Buletin

项目来源：国家自然科学基金项目

关键字：Upconversion luminescence NaErF4:Yb3+ nanoparticles and nanorods Transient spectroscopy Gd3+-codoping

摘要：Upconverting NaErF4:Yb3+,Gd3+ nanoparticles (NPs) and nanorods (NRs) with improved red emission have been successfully achieved via a facile hydrothermal route using oleic acid as the assistant surfactant. The crystalline phase, morphology even the size are simultaneously tuned by controlling the reaction temperatures and Gd3+ doping contents. The higher synthesis temperature leads to the morphology evolution from NPs to NRs. The integrated intensity ratio of red to green emissions is much improved for Gd3+ codoping nanostructures. The microstructure characterizations along with the steady and transient spectroscopy are performed to better understand the underlying mechanisms of phase evolution and emission enhancement. For the different states of Er3+, i.e. 2H11/2 and 4F9/2, the radiative/non-radiative transition probabilities could be affected by Gd3+ doping in different ways as for NPs and NRs, based on the lifetime and emission intensity data. NaErF4:Yb3+,Gd3+ nanosctructures are expected to have promising applications in multimodal bioimaging for deeper tissue penetration.

第一作者：陈力

论文类型：期刊论文

期号：95

页面范围：1

ISSN号：0025-5408

是否译文：否

发表时间：2017-08-18