Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/122262
Title: DEVELOPING CORE-SHELL UPCONVERSION NANOPARTICLES FOR OPTICAL ENCODING
Authors: HUANG KAI
Keywords: Upconversion nanoparticles, Nanomaterials, Energy transfer, Core-shell, Microfluidics, Optical encoding
Issue Date: 21-Aug-2015
Citation: HUANG KAI (2015-08-21). DEVELOPING CORE-SHELL UPCONVERSION NANOPARTICLES FOR OPTICAL ENCODING. ScholarBank@NUS Repository.
Abstract: UPCONVERSION NANOPARTICLES (UCNPS) EMIT UV OR VISIBLE LIGHT UNDER NEAR INFRA-RED (NIR) EXCITATIONS, THEREBY POSSESSING A LARGE ANTI-STOKES SHIFT PROPERTY. PLUS THEIR EXCELLENT PHOTO- AND CHEMICAL STABILITY, AND SHARP EMISSION BANDS, UCNPS ARE ADVANTAGEOUS FOR OPTICAL ENCODING. FABRICATING CORE-SHELL STRUCTURED UCNPS PROVIDES A PROMISING STRATEGY TO TUNE AND ENHANCE THEIR UPCONVERTING LUMINESCENCE. HOWEVER, THE ENERGY TRANSFER BETWEEN CORE AND SHELL WERE RARELY STUDIED. MOREOVER, THIS STRATEGY WAS LIMITED BY THE DIFFICULTY OF COATING EXTREMELY THICK SHELL ONTO BIG CORE UCNPS. IN THIS THESIS, THE ENERGY TRANSFER IN THE CORE-SHELL UCNPS WERE STUDIED SYSTEMATICALLY, THESE INFORMATION WERE UTILIZED TO FABRICATE UCNPS WITH ENHANCED AND TUNEABLE LUMINESCENCE BY FINE ARRANGING THE IONS IN THE CORE-SHELL STRUCTURE. A STRATEGY OF COATING THICK SHELL BY LUTETIUM DOPING WAS ALSO DEVELOPED, PROVIDING MORE FREEDOM FOR ENGINEERING CORE-SHELL UCNPS WITH MULTIPLE LAYERS AND DESIRED THICKNESS. THESE UCN
URI: http://scholarbank.nus.edu.sg/handle/10635/122262
Appears in Collections:Ph.D Theses (Open)

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