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Cited by 720

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

(α-NaYbF4:Tm3+)/CaF2 Core/Shell Nanoparticles with Efficient Near-Infrared to Near-Infrared Upconversion for High-Contrast Deep Tissue Bioimaging

Open access
Chen, Guanying, Shen, Jie, Ohulchanskyy, Tymish Y., Patel, Nayan J., Kutikov, Artem, Li, Zhipeng, Song, Jie, Pandey, Ravindra K., Ågren, Hans, Prasad, Paras N., Han, Gang·2012·ACS Nano

Abstract

We describe the development of novel and biocompatible core/shell (α-NaYbF(4):Tm(3+))/CaF(2) nanoparticles that exhibit highly efficient NIR(in)-NIR(out) upconversion (UC) for high contrast and deep bioimaging. When excited at ~980 nm, these nanoparticles emit photoluminescence (PL) peaked at ~800 nm. The quantum yield of this UC PL under low power density excitation (~0.3 W/cm(2)) is 0.6 ± 0.1%. This high UC PL efficiency is realized by suppressing surface quenching effects via heteroepitaxial growth of a biocompatible CaF(2) shell, which results in a 35-fold increase in the intensity of UC PL from the core. Small-animal whole-body UC PL imaging with exceptional contrast (signal-to-background ratio of 310) is shown using BALB/c mice intravenously injected with aqueously dispersed nanoparticles (700 pmol/kg). High-contrast UC PL imaging of deep tissues is also demonstrated, using a nanoparticle-loaded synthetic fibrous mesh wrapped around rat femoral bone and a cuvette with nanoparticle aqueous dispersion covered with a 3.2 cm thick animal tissue (pork).

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Crossref · 10.1021/nn302972r

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Metadata

Authors
Chen, G., Shen, J., Ohulchanskyy, T. Y., Patel, N. J., Kutikov, A., Li, Z., Song, J., Pandey, R. K., Ågren, H., Prasad, P. N., & Han, G.
Venue
ACS Nano
Published
2012-09-04
Volume
6
Issue
9
Pages
8280-8287
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W1990135886
Cited by
720
References
36
FWCI
30.55
Type
journal article
Language
en
Open access
green

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