Sedlmeier, Andreas and Hlavaecek, Antonin and Birner, Lucia and Mickert, Matthias J. and Muhr, Verena and Hirsch, Thomas and Corstjens, Paul L. A. M. and Tanke, Hans J. and Soukka, Tero and Gorris, Hans H. (2016) Highly Sensitive Laser Scanning of Photon-Upconverting Nanoparticles on a Macroscopic Scale. ANALYTICAL CHEMISTRY, 88 (3). pp. 1835-1841. ISSN 0003-2700, 1520-6882
Full text not available from this repository. (Request a copy)Abstract
An upconversion laser scanner has been optimized to exploit the advantages of photon-upconverting nanoparticles (UCNPs) for background-free imaging on a macroscopic scale. A collimated 980 nm laser beam afforded high local excitation densities to account for the nonlinear luminescence response of UCNPs. As few as 2000 nano particles were detectable, and the linear dynamic range covered more than 5 orders of magnitude, which is essentially impossible by using conventional fluorescent dyes. UCNPs covered by a dye-doped silica shell were separated by agarose gel electrophoresis and scanned by a conventional fluorescence scanner as well as the upconversion scanner. Both optical labels could be detected independently. Finally, upconversion images of lateral flow test strips were recorded to facilitate the sensitive and quantitative detection of disease markers. A marker for the parasitic worm Schistosoma was used in this study.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CONVERTING PHOSPHOR REPORTERS; LANTHANIDE-DOPED NANOCRYSTALS; UP-CONVERSION NANOPARTICLES; CIRCULATING ANODIC ANTIGEN; LATERAL FLOW ASSAY; IMAGING IN-VIVO; FLUORESCENT; CELLS; NANOPHOSPHORS; LUMINESCENCE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 12 Mar 2019 12:22 |
| Last Modified: | 12 Mar 2019 12:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2417 |
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