Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/49613
Title: Functional Lanthanide-doped Upconversion Nanocrystals: Optical Properties and Mechanism Study
Authors: DENG RENREN
Keywords: Upconversion nanoparticles, Nanomaterials, lanthanides, Rare earth, Luminescence, Photo-upconversion
Issue Date: 2-Aug-2013
Source: DENG RENREN (2013-08-02). Functional Lanthanide-doped Upconversion Nanocrystals: Optical Properties and Mechanism Study. ScholarBank@NUS Repository.
Abstract: Luminescent nanoparticles such as lanthanide-doped upconversion nanocrystals have been the focus of a growing body of investigation because of their promising applications ranging from sensors to biological imaging and drug delivery. The aim of this thesis was to investigate on synthetic approaches, structural features, optical properties and their relationship to the functionality of lanthanide-doped upconversion nanocrystals. Herein, several rational methods were examined for controlling the functionalities of upconversion nanomaterials through tuning the interactions between doped trivalent lanthanide ions and host materials. By spatially confining the doping elements in a single nanoparticle or in sublattice crystal structures levels, more efficient utilization of the excitation energy in a single nanoparticle has been demonstrated in the hosts of NaGdF4 and KYb2F7. Moreover, an example of biosensing application based on MnO2-nanosheets-modified upconversion nanoparticles was studied. The methods presented in this study should be helpful for making the practical applicable upconversion nanomaterials in the future.
URI: http://scholarbank.nus.edu.sg/handle/10635/49613
Appears in Collections:Ph.D Theses (Open)

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