Open AccessOptical Properties of Afterglow Nanoparticles : , Capped with Polyethylene Glycol
Author(s) -
Fumitaka Yoshimura,
Mika Ishizaki,
Fumihiro Wakai,
Masahiko Hara,
Osamu Odawara,
Hiroyuki Wada
Publication year - 2011
Publication title -
advances in optical technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.124
H-Index - 25
eISSN - 1687-6407
pISSN - 1687-6393
DOI - 10.1155/2012/814745
Subject(s) - afterglow , polyethylene glycol , nanoparticle , materials science , peg ratio , quantum yield , colloid , chemical engineering , fluorescence , analytical chemistry (journal) , nanotechnology , photochemistry , optics , chemistry , chromatography , physics , gamma ray burst , finance , astronomy , engineering , economics
The optical properties of afterglow nanoparticles were successfully improved by the addition of polyethylene glycol (PEG) to an afterglow colloidal solution. Afterglow nanoparticles—Sr2MgSi2O7: Eu2+, Dy3+—were prepared by laser ablation in liquid. The quantum yields and the decay curves were measured by a fluorescence spectrophotometer. An increase in the amount of PEG added to the solution increased the quantum yield of the nanoparticles and improved the afterglow property in the initial portion of the decay curve. However, the afterglow property did not change after a substantial amount of time had passed. The afterglow nanoparticles were capped with PEG molecules, and surface defects of the nanoparticles were passivated, which decreased the optical properties
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom