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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 31: Organic semiconductors II
CPP 31.6: Vortrag
Donnerstag, 29. März 2012, 11:00–11:15, C 130
Tailoring the electronic properties of polypyrrole thin films for acid detection — •Céline Vervacke1, Carlos César Bof Bufon1, Pablo Roberto Fernández Siles1,2, and Oliver G. Schmidt1,2 — 1Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany — 2Material Systems for Nanoelectronics, TU Chemnitz, Reichenhainerstrasse 70, 09107 Chemnitz, Germany
Water acidification is one of the most important environmental issues affecting all ecosystems [1]. In this work we demonstrate the fabrication and characterisation of HCl, H2SO4 and H3PO4 detectors based on chemically grown polypyrrole (PPy) thin films with thickness below 100 nm [2, 3]. In addition, the organic layers are incorporated into self-wounded microtubes with diameter of about 15-20 µm for lab-on-a-chip integration. In order to allow the acid detection, PPy was successfully discharged in water, minimizing in this way the polymer degradation which is often observed when performed by other means (e.g. chemical and electrochemical reduction) [4]. The investigation of the structural modifications and the electrical properties were conducted by means of transport measurements, infrared spectroscopy, cyclic voltammetry and current sensing AFM methods.
1. C.D. Evans et al., Environ. Sci. Technol. 45, 1887 (2011)
2. C.C. Bof Bufon and T. Heinzel, Appl. Phys. Lett. 89, 012104 (2006)
3. C.C. Bof Bufon and T. Heinzel, Phys. Rev. B 76, 245206 (2007)
4. C.C. Bof Bufon et al., J. Phys. Chem. B 114, 714 (2010)