Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 21: Transport: Graphene and Carbon Nanotubes
TT 21.11: Vortrag
Dienstag, 26. Februar 2008, 18:30–18:45, EB 202
Optoelectronic Measurements on Hybrid Systems made out of Carbon Nanotubes (CNTs) and the Photosystem I (PS I) — •Simone Lingitz1, Markus Mangold1, Itai Carmeli2, Ludmila Frolov2, Chanoch Carmeli2, Shachal Richter2, and Alexander Holleitner1 — 1Walter Schottky Institut, TUM, Garching, Deutschland — 2Center for NanoScience, Tel Aviv University, Israel
We examine the Photosystem I (PS I) covalently bound to carbon nanotubes (CNTs) by optoelectronic transport spectroscopy [1]. The PS I is a protein complex located in the thylacoid membrane of plants, algae and cyanobacteria which mediates the light-induced electron transfer in the photosynthetic pathway. As a nano-sized, high-efficient bioenergetic unit, the photosynthetic reaction centre is a promising candidate for applications in molecular nano-optoelectronics. In order to electrically contact the photoactive proteins, a cysteine mutant is generated at one end of the PS I by genetic engineering and to this reactive group the CNTs are covalently bound via chemical self-assembly using carbodiimide chemistry. Due to this combination of an energy transformation and a transport unit, this hybrid nanosystem provides an ideal basis for optoelectronic applications. In my talk, I will present wavelength and power dependent photoresponse measurements on such a CNT-PS I heterostructure in comparison to a pure CNT device. [1] S. Lingitz, M. Mangold, et al. in preparation (2008).