Tuning Single-Molecule Dynamics in Functionalized Mesoporous Silica (pages 1661–1672)
Timo Lebold, Lea A. Mühlstein, Julia Blechinger, Melanie Riederer, Heinz Amenitsch, Ralf Köhn, Kalina Peneva, Klaus Müllen, Jens Michaelis, Christoph Bräuchle and Thomas Bein
Version of Record online: 2 JAN 2009 | DOI: 10.1002/chem.200801380
Diffusion of single molecules of a substituted terrylene diimide dye in functionalized mesoporous silica films was monitored by single-molecule fluorescence microscopy. By varying the chemical nature and density of the functional groups, the diffusion dynamics of the dye molecules can be controlled precisely. The picture shows a sketch of a dye molecule in a pore, diffusion data for different phenyl functionalization densities, and the trajectory of one molecule in a cyanopropyl-functionalized film.