Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
Single light emitters in electrospun polymer nanofibers: Effect of local confinement on radiative decay(full pdf)
Nikodem Tomczak, Shuying Gu, Mingyong Han, Niek F. van Hulst, G. Julius Vancso
European Polymer Journal
vol 42 p2205-2210 23 aug 2006
The fabrication of light emitting polymer nanofibers by electrospinning of polymer solutions containing either fluorescent organic dye molecules or luminescent semiconductor nanoparticles (quantum dots) is presented. The fluorescence spectra and lifetime of the embedded emitters, down to the level of single molecules were investigated. While the average fluorescence lifetime of single molecules embedded in poly(methyl methacrylate) fibers appears independent of the fiber diameter, the single molecule approach reveals a significant broadening of the fluorescence lifetime distribution for fibers with diameters below the wavelength of light. © Elsevier Ltd. All rights reserved.