Saleh, Sayed M. and Mueller, Rainer and Mader, Heike S. and Duerkop, Axel and Wolfbeis, Otto S. (2010) Novel multicolor fluorescently labeled silica nanoparticles for interface fluorescence resonance energy transfer to and from labeled avidin. ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 398 (4). pp. 1615-1623. ISSN 1618-2642,
Full text not available from this repository. (Request a copy)Abstract
Fluorescent silica nanoparticles (SiNPs) were prepared by covalent attachment of fluorophores to the amino-modified surface of SiNPs with a typical diameter of 15 nm. The SiNPs are intended for use in novel kinds of fluorescence resonance energy transfer (FRET)-based affinity assays at the interface between nanoparticle and sample solution. Various labels were employed to obtain a complete set of colored SiNPs, with excitation maxima ranging from 337 to 659 nm and emission maxima ranging from 436 nm to the near infrared (710 nm). The nanoparticles were characterized in terms of size and composition using transmission electron microscopy, thermogravimetry, elemental analysis, and dynamic light scattering. The surface of the fluorescent SiNPs was biotinylated, and binding of labeled avidin to the surface was studied via FRET in two model cases. In the first, FRET occurs from the biotinylated fluorescent SiNP (the donor) to the labeled avidin (the acceptor). In the second, FRET occurs in the other direction. Aside from its use in the biotin-avidin system, such SiNPs also are believed to be generally useful fluorescent markers in various kinds of FRET assays, not the least because the fluorophore is located on the surface of the SiNPs (and thus always much closer to the second fluorophore) rather than being doped deep in its interior.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CORE-SHELL NANOPARTICLES; BIOSENSING APPLICATIONS; FUNCTIONALIZED SILICA; DRUG-DELIVERY; SURFACE; DNA; CONJUGATION; DIAGNOSTICS; PROBES; Silica nanoparticles; Surface modification; Near-infrared label; FRET; Surface affinity assay; Biotin |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Antje J. Bäumner, formerly Prof. Wolfbeis) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Jul 2020 09:31 |
| Last Modified: | 08 Jul 2020 09:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/24035 |
Actions (login required)
 |
View Item |
