Regensburg 2013 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster: Nanoparticles and Composite Materials
CPP 12.4: Poster
Monday, March 11, 2013, 17:30–19:30, Poster C
Optical switchable properties of polymer-carbon-nanotubes nanocomposites based on photochromic molecules — •Viktor Schneider1, Thomas Strunskus1, Mady Elbahri2, and Franz Faupel1 — 1Technische Fakultät der Uni Kiel, Institut für Materialwissenschaft-Materialverbunde — 2Technische Fakultät der Uni Kiel, Institut für Materialwissenschaft-Nanochemistry and Nanoengineering
Photochromic molecular switches are a class of organic molecules that allow a reversible control over the molecular structure or the molecular dipole moment with light. This attributes provide the possibility of photoswitching of bulk properties of composite materials like electrical conductance or dipole moment. In this work, azobenzene based chromophores were incorporated into polymer-carbon-nanotubes nanocomposites, and the photoswitching properties were investigated in a self made electro-optical measuring station. The changes in electrical resistance by illumination with ultraviolet (360 nm) and blue light (480 nm) were measured. For the multi wall carbon nanotubes, switching amplitudes of several percent were achieved, while single wall carbon nanotubes showed even changes up to 30 percent in resistance. The switching and conductance change mechanisms will be discussed.