We thank R. Sperling and W. J. Parak for supplying us with quantum dots, T. Schubert for tracking software, and J. O. Rädler, N. A. Langrana, R. A. Neher, and M. Rief for helpful discussions. This work was funded by the IDK-NBT, the DFG (Emmy Noether Grant to FCS and Nanosystems Initiative Munich), and the Bavarian StMWFK (Neue Werkstoffe).
Controlled Trapping and Release of Quantum Dots in a DNA-Switchable Hydrogel†
Article first published online: 4 SEP 2007
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 3, Issue 10, pages 1688–1693, October 1, 2007
How to Cite
Liedl, T., Dietz, H., Yurke, B. and Simmel, F. (2007), Controlled Trapping and Release of Quantum Dots in a DNA-Switchable Hydrogel. Small, 3: 1688–1693. doi: 10.1002/smll.200700366
- Issue published online: 24 SEP 2007
- Article first published online: 4 SEP 2007
- Manuscript Received: 25 MAY 2007
- DNA structures;
- sol–gel processes
Entrapment: Trapping and releasing (see figure) nanoparticles has never before been as easily controlled as with these novel DNA-crosslinked hydrogels. The diffusion properties of fluorescent semiconductor nanoparticles in these DNA-switchable hydrogels is studied using single-quantum-dot tracking and fluorescence correlation spectroscopy. The diameter of the trapped nanoparticles can be much smaller than the mean pore size and therefore these switchable materials open new avenues for the controlled release of nanoscale agents.