Regensburg 2007 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 30: Hybrid systems
HL 30.2: Talk
Wednesday, March 28, 2007, 14:30–14:45, H17
Hybrid Systems made out of Carbon Nanotubes and the Photosynthetic Reaction Center I (PS I) — Itai Carmeli2, Markus Mangold1, Bernd Zebli1, Klaus-Dieter Hof1, Ludmila Frolov2, Chanoch Carmeli2, Shacher Richter2, and •Alexander Holleitner1 — 1Center of NanoScience (CeNS) and Department für Physik, LMU München, Germany — 2Center for NanoScience, Tel Aviv University, Israel
We study the nanoelectronic properties of hybrid systems made out of carbon nanotubes (CNTs) and the photosynthetic reaction center (PS I). Generally, the utilized PS I can be found in the thylakoid membranes of cyanobacteria and it mediates light-induced electron transfer in the photosynthesis [1]. The nano-sized dimension, the generation of 1V photovoltage, the energy yield of approximately 58%, and a quantum efficiency of almost 100% makes the PS I reaction center a promising unit for applications in molecular nano-optoelectronics. Utilizing a unique Cys mutation at the end of PS I by genetic engineering, we demonstrate that the reaction center can be coupled to carbon nanotubes (CNTs) via chemical self-assembly using carbodiimide chemistry [2]. The method allows studying hybrid nanosystems for the construction of optoelectronic devices based on PSI-CNTs heterostructures. Three different architectures of PSI-CNTs hybrid structures are presented which allow exploiting the potential of PS I as an integrated part of CNT devices for optoelectronic applications. [1] K. Brettel, Biochimica et Biophysica Acta 1318 , 322 (1997); [2] I. Carmeli, B. Zebli, L. Frolov, C. Carmeli, S. Richter, and A.W. Holleitner (2007).