Title

Regularity: Lattice-Valued Cauchy Spaces

Keywords

Energy transfer effects; Imaging; Nano particles; Up conversion

Abstract

The effects of Yb 3+ doping on up conversion in Yb 3+Er 3+ co-doped cerium oxide nanocrystals are reported. Green emission around 545 and 560 nm attributed to the 2H 11/2, 4S 3/2→ 4I 15/2 transitions and red emission around 660 and 680 nm due to 4F 9/2→ 4I 15/2 transitions under 975 nm excitation were studied at room temperature. Both green and red emission intensities increase as the Yb 3+ concentration increases from 0%. Emission strength starts to decrease after the Yb 3+ concentration exceeds a critical amount. The green emission strength peaks around 1% Yb 3+ concentration while the red emission strength peaks around 4%. An explanation of competition between different decay mechanisms is presented to account for the luminescence dependence on Yb 3+ concentration. Also, the application of up converting nanoparticles in biomedical imaging is demonstrated. © 2011 Elsevier B.V. All rights reserved.

Publication Date

3-1-2012

Publication Title

Fuzzy Sets and Systems

Volume

190

Issue

3

Number of Pages

94-104

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.fss.2011.08.006

Socpus ID

84855331378 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84855331378

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