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Issue 5, 2015
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Submicron polyacrolein particles in situ embedded with upconversion nanoparticles for bioassay

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Abstract

We report a new surface modification approach of upconversion nanoparticles (UCNPs) structured as inorganic hosts NaYF4 codoped with Yb3+ and Er3+ based on their encapsulation in a two-stage process of precipitation polymerization of acrolein under alkaline conditions in the presence of UCNPs. The use of tetramethylammonium hydroxide both as an initiator of acrolein polymerization and as an agent for UCNP hydrophilization made it possible to increase the polyacrolein yield up to 90%. This approach enabled the facile, lossless embedment of UCNPs into the polymer particles suitable for bioassay. These particles are readily dispersible in aqueous and physiological buffers, exhibiting excellent photoluminescence properties, chemical stability, and also allow the control of particle diameters. The feasibility of the as-produced photoluminescent polymer particles mean-sized 260 nm for in vivo optical whole-animal imaging was also demonstrated using a home-built epi-luminescence imaging system.

Graphical abstract: Submicron polyacrolein particles in situ embedded with upconversion nanoparticles for bioassay

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Supplementary files

Article information


Submitted
08 Oct 2014
Accepted
01 Dec 2014
First published
03 Dec 2014

Nanoscale, 2015,7, 1709-1717
Article type
Paper
Author version available

Submicron polyacrolein particles in situ embedded with upconversion nanoparticles for bioassay

A. N. Generalova, I. K. Kochneva, E. V. Khaydukov, V. A. Semchishen, A. E. Guller, A. V. Nechaev, A. B. Shekhter, V. P. Zubov, A. V. Zvyagin and S. M. Deyev, Nanoscale, 2015, 7, 1709
DOI: 10.1039/C4NR05908E

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