Please use this identifier to cite or link to this item: https://doi.org/10.1038/nmat3149
Title: Tuning upconversion through energy migration in core-shell nanoparticles
Authors: Wang, F. 
Deng, R.
Wang, J.
Wang, Q.
Han, Y.
Zhu, H.
Chen, X.
Liu, X. 
Issue Date: Dec-2011
Citation: Wang, F., Deng, R., Wang, J., Wang, Q., Han, Y., Zhu, H., Chen, X., Liu, X. (2011-12). Tuning upconversion through energy migration in core-shell nanoparticles. Nature Materials 10 (12) : 968-973. ScholarBank@NUS Repository. https://doi.org/10.1038/nmat3149
Abstract: Photon upconversion is promising for applications such as biological imaging, data storage or solar cells. Here, we have investigated upconversion processes in a broad range of gadolinium-based nanoparticles of varying composition. We show that by rational design of a core-shell structure with a set of lanthanide ions incorporated into separated layers at precisely defined concentrations, efficient upconversion emission can be realized through gadolinium sublattice-mediated energy migration for a wide range of lanthanide activators without long-lived intermediary energy states. Furthermore, the use of the core-shell structure allows the elimination of deleterious cross-relaxation. This effect enables fine-tuning of upconversion emission through trapping of the migrating energy by the activators. Indeed, the findings described here suggest a general approach to constructing a new class of luminescent materials with tunable upconversion emissions by controlled manipulation of energy transfer within a nanoscopic region. © 2011 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/77323
ISSN: 14761122
DOI: 10.1038/nmat3149
Appears in Collections:Staff Publications

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

SCOPUSTM   
Citations

890
checked on Jun 18, 2018

WEB OF SCIENCETM
Citations

855
checked on Jun 5, 2018

Page view(s)

43
checked on Jun 1, 2018

Google ScholarTM

Check

Altmetric


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