Dopant-controlled synthesis of water-soluble hexagonal NaYF^sub 4^ nanorods with efficient upconversion fluorescence for multicolor bioimaging

A novel strategy is proposed to directly synthesize water-soluble hexagonal NaYF^sub 4^ nanorods by doping rare-earth ions with large ionic radius (such as La^sup 3+^, Ce^sup 3+^, Pr^sup 3+^, Nd^sup 3+^, Sm^sup 3+^, Eu^sup 3+^, and Gd^sup 3+^), and the dopantcontrolled growth mechanism is studied. B...

Full description

Saved in:
Bibliographic Details
Published in:Nano research 2010-01, Vol.3 (1), p.51
Main Authors: Yu, Xuefeng, Li, Min, Xie, Mengyin, Chen, Liangdong, Li, Yan, Wang, Ququan
Format: Article
Language:English
Subjects:
Electron microscopes
Fluorescence
Fluorides
Fourier transforms
Intermetallic compounds
Nanocrystals
Optical properties
Optics
Phase transitions
Surfactants
Transmission electron microscopy
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel strategy is proposed to directly synthesize water-soluble hexagonal NaYF^sub 4^ nanorods by doping rare-earth ions with large ionic radius (such as La^sup 3+^, Ce^sup 3+^, Pr^sup 3+^, Nd^sup 3+^, Sm^sup 3+^, Eu^sup 3+^, and Gd^sup 3+^), and the dopantcontrolled growth mechanism is studied. Based on the doping effect, we fabricated water-soluble hexagonal NaYF^sub 4^:(Yb,Er)/La and NaYF^sub 4^:(Yb,Er)/Ce nanorods, which exhibited much brighter upconversion fluorescence than the corresponding cubic forms. The sizes of the nanorods can be adjusted over a broad range by changing the dopant concentration and reaction time. Furthermore, we successfully demonstrated a novel depth-sensitive multicolor bioimaging for in vivo use by employing the as-synthesized NaYF^sub 4^:(Yb,Er)/La nanorods as probes. [PUBLICATION ABSTRACT]
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-010-1008-2