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Highly-luminescent Eu,Sm,Mn-doped CaS Up/Down conversion Nano-particles: Application to Ultra-Sensitive Latent Fingerprint Detection and in vivo Bioimaging

Abstract

Due to their unique properties rare earth doped upconversion luminescence (UCL) nanomaterials are of considerable scientific interest. While alkaline-earth sulfide materials based completely different Electron Trapping (ET) mechanism demonstrate extremely high UCL efficiencies, which are several dozens of times more than conventional fluoride UCL nanomaterials. But large particle size, easy hydrolysis, and difficulty in achieving uniform dispersion have precluded bioassay applications. Herein, we have synthesized super-bright Eu,Sm,Mn-doped CaS nanoparticles of ~30 nm average particle size using a reverse microemulsion technique. The UCL quantum yield was up to nearly 60%. Modification of the nanoparticles with an organic layer allows their stable dispersion through out aqueous solutions without significant loss of fluorescence intensity. We demonstrate application of the novel UCL materials to latent fingerprint detection, deep tissue imaging, and in vivo bioimaging.

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Publication details

The article was received on 10 Oct 2017, accepted on 01 Dec 2017 and first published on 05 Dec 2017


Article type: Communication
DOI: 10.1039/C7CC07790D
Citation: Chem. Commun., 2017, Accepted Manuscript
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    Highly-luminescent Eu,Sm,Mn-doped CaS Up/Down conversion Nano-particles: Application to Ultra-Sensitive Latent Fingerprint Detection and in vivo Bioimaging

    J. Wang, N. He, Y. Zhu, Z. An, P. Chen, Z. Nie, C. Grimes and Q. Cai, Chem. Commun., 2017, Accepted Manuscript , DOI: 10.1039/C7CC07790D

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