Towards pure near-infrared to near-infrared upconversion of multifunctional GdF3: Yb3+,Tm3+ nanoparticles

Hon Tung Wong, Helen Lai Wa Chan, Jianhua Hao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

105 Citations (Scopus)

Abstract

Nearly pure near-infrared to near-infrared (NIR-to-NIR) upconversion in GdF3 host with 23% Yb3+ and 1% Tm3+ under 980 nm excitation is firstly reported. The ratio of the intensity of the emission at 807 nm to that at 478 nm can reach to 105, and the intensity of the emission at 807 nm is preserved. Moreover, the excitation and the emission at 980 and 807 nm are away from the visible region. These are beneficial to deeper tissue penetration and reduced autofluorescence. Raman spectroscopy measurements suggest the high probability of NIR emission in GdF3 host. Our results indicate that the reported multifunctional nanoparticles are promising in bio-imaging and bio-separation.
Original languageEnglish
Pages (from-to)6123-6130
Number of pages8
JournalOptics Express
Volume18
Issue number6
DOIs
Publication statusPublished - 15 Mar 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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