Please use this identifier to cite or link to this item: https://doi.org/10.1021/cm062447y
Title: Water-soluble NaYF4:Yb,Er(Tm)/NaYF4/polymer core/shell/shell nanoparticles with significant enhancement of upconversion fluorescence
Authors: Yi, G.-S. 
Chow, G.-M. 
Issue Date: 6-Feb-2007
Citation: Yi, G.-S., Chow, G.-M. (2007-02-06). Water-soluble NaYF4:Yb,Er(Tm)/NaYF4/polymer core/shell/shell nanoparticles with significant enhancement of upconversion fluorescence. Chemistry of Materials 19 (3) : 341-343. ScholarBank@NUS Repository. https://doi.org/10.1021/cm062447y
Abstract: Hexagonal bulk nanoparticles of NaYF4:Yb,Er(Tm) were prepared by solid-state or hydrothermal reaction. These hexagonal phase NaYF 4:Yb,Er(Tm) nanoparticles of small size and narrow size distribution were hydrophobic with lower fluorescence compared to the bulk counterparts. These hydrophobic C/S nanoparticles rendered hydrophobic by a layer of amphiphilic polymer. The polymer coated C/S nanoparticles synthesized contain an amphiphilic layer, 25% octylamine, and 40% isopropylamine modified poly(acrylic acid) (PAA). The organic surfactant with high vibrational energy on the nanoparticle surface quench fluorescence. The transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) images of NaYF4:Yb,Er(Tm) confirm single crystallinity. The results show major upconversion fluorescence enhancements of 7.4 times from NaYF4:Yb, Er C/S and 29.6 times from NaYF4:Yb, Tm C/S.
Source Title: Chemistry of Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/86843
ISSN: 08974756
DOI: 10.1021/cm062447y
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

561
checked on Dec 10, 2018

WEB OF SCIENCETM
Citations

521
checked on Dec 10, 2018

Page view(s)

90
checked on Nov 23, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.