Jump to main content
Jump to site search

Issue 16, 2012
Previous Article Next Article

Plasmon enhanced upconversion luminescence of NaYF4:Yb,Er@SiO2@Ag core–shell nanocomposites for cell imaging

Author affiliations

Abstract

NaYF4:Yb,Er@SiO2@Ag core–shell nanocomposites were prepared to investigate metal-enhanced upconversion luminescence. Two sizes (15 and 30 nm) of Ag nanoparticles were used. The emission intensity of the upconversion nanocrystals was found to be strongly modulated by the presence of Ag nanoparticles (NPs) on the outer shell layer of the nanocomposites. The extent of modulation depended on the separation distance between Ag NPs and upconversion nanocrystals. The optimum upconversion luminescence enhancement was observed at a separation distance of 10 nm for Ag NPs with two different sizes (15 and 30 nm). A maximum upconversion luminescence enhancement of 14.4-fold was observed when 15 nm Ag nanoparticles were used and 10.8-fold was observed when 30 nm Ag NPs were used. The separation distance dependent emission intensity is ascribed to the competition between energy transfer and enhanced radiative decay rates. The biocompatibility of the nanocomposites was significantly improved by surface modification with DNA. The biological imaging capabilities of these nanocomposites were demonstrated using B16F0 cells.

Graphical abstract: Plasmon enhanced upconversion luminescence of NaYF4:Yb,Er@SiO2@Ag core–shell nanocomposites for cell imaging

Back to tab navigation

Supplementary files

Article information


Submitted
21 May 2012
Accepted
21 Jun 2012
First published
25 Jun 2012

Nanoscale, 2012,4, 5132-5137
Article type
Paper

Plasmon enhanced upconversion luminescence of NaYF4:Yb,Er@SiO2@Ag core–shell nanocomposites for cell imaging

P. Yuan, Y. H. Lee, M. K. Gnanasammandhan, Z. Guan, Y. Zhang and Q. Xu, Nanoscale, 2012, 4, 5132 DOI: 10.1039/C2NR31241G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements