Fluorophores as Optical Sensors for Local Forces (pages 2041–2048)
Stefan Marawske, Denis Dörr, Daniel Schmitz, Axel Koslowski, You Lu, Helmut Ritter, Walter Thiel, Claus A. M. Seidel and Ralf Kühnemuth
Article first published online: 26 MAY 2009 | DOI: 10.1002/cphc.200900240
Optical force sensor: To explore the use of fluorophores as optical sensors for local mechanical forces, a custom-tailored chromophore is synthesized and aligned in a flexible polyvinyl chloride matrix by stretching (see picture). Applying tensile stress causes a decrease in the fluorescence lifetime by 2.5 % and a blue-shift of the fluorescence spectrum of 1.2 nm, consistent with the predictions from semiempirical calculations.