Title :
Local field effect on Nd3+-doped α-NaYF4 nanocrystals in liquids
Author :
Xiaojie Xue ; Suzuki, Takumi ; Ohishi, Yasutake
Author_Institution :
Res. Center for Adv. Photonic Technol., Toyota Tech. Inst., Nagoya, Japan
Abstract :
The oleate-capped α-NaYF4:Nd3+ nanocrystals (NCs) were synthesized via solvothermal method. By a ligand exchange method, the oleate-capped NCs could be changed to citrate-capped samples which can be dispersed in polar solvents. By the relation between the measured emission lifetime and effective refractive indices of the composites containing NCs, the local field effect was investigated. It was found that the preferable model would change from the real cavity model to virtual cavity model when the particle size reduced to 6 nm in nonpolar solvent system, but the preferable model kept being real cavity model in polar solvent system.
Keywords :
liquids; nanocomposites; nanofabrication; nanoparticles; neodymium; optical materials; particle size; refractive index; sodium compounds; solvent effects; yttrium compounds; NaYF4:Nd; citrate-capped samples; composites; effective refractive index; emission lifetime; ligand exchange method; liquids; local field effect; oleate-capped nanocrystals; particle size; polar solvents; real cavity model; size 6 nm; solvothermal method; virtual cavity model; Cavity resonators; Liquids; Media; Nanocrystals; Optical refraction; Optical variables control; Solvents;
Conference_Titel :
Optical MEMS and Nanophotonics (OMN), 2013 International Conference on
Conference_Location :
Kanazawa
Print_ISBN :
978-1-4799-1512-5
DOI :
10.1109/OMN.2013.6659104
