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HL: Fachverband Halbleiterphysik

HL 46: Hybrid systems

HL 46.1: Vortrag

Donnerstag, 26. März 2009, 12:30–12:45, POT 151

Optoelectronic Properties of Hybrids made of the Photosynthetic Reaction Center (PS I) and Carbon Nanotubes — •Matthias Brandstetter¹, Simone Kaniber¹, Alexander Holleitner¹, and Itai Carmeli² — ¹Walter Schottky Institut, Technical University Munich, Am Coulombwall 3, 85748 Garching, Germany — ²Department of Chemistry and Biochemistry, Tel-Aviv University, Tel-Aviv 69978 (Israel)

The photosystem I (PS I) reaction center is a chlorophyll protein complex located in thylakoid membranes of chloroplasts and cyanobacteria. The PS I mediates a light-induced electron transfer through a serial of redox reactions [1]. The nanoscale dimension and the generation of 1 V photovoltage make the PS I reaction center a promising unit for applications in molecular optoelectronics. Utilizing a unique cysteine mutation at the end of the PS I, we demonstrate a four-step chemical procedure based on carbodiimide chemistry for covalent binding of the PS I to carbon nanotubes. The method allows studying nanosystems for the construction of optoelectronic devices based on PS I - carbon nanotube hybrids [2]. In addition, we present optoelectronic data of such hybrids consisting of carbon nanotubes and the PS I. We demonstrate that the integrated proteins are optoelectronically active [3].

[1] L. Frolov et al., Adv. Mater. 17, 2434 (2005). [2] I. Carmeli, M. Mangold, L. Frolov, B. Zebli, I. Carmeli, C. Carmeli, S. Richter and A.W. Holleitner, Adv. Materials 19, 3901 (2007). [3] S. Kaniber et al., (2009).