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NanoMat 2018
Nano Research & Applications
ISSN: 2471-9838
Page 53
April 26-27, 2018
Rome, Italy
17
th
Edition of International Conference on
Emerging Trends in
Materials Science and
Nanotechnology
E
fficient electronic junctions were fabricated by covalent
binding of photosynthetic reaction center proteins to metals,
semiconductors
polymer
poly(3,4-ethylenedioxythiophene)
polystyrene sulfonate (PEDOT:PSS) and solid semiconductor ITO.
The primary stages of photosynthesis take place in nanometric-
size protein-chlorophyll complexes photosystem I (PSI). PSI
generates a photo voltage of 1 V with an absorbed light-energy
conversion efficiency of 47% (~23% solar energy) and a quantum
efficiency of ~100%. The robust cyanobacterial PSI was used
in the fabrication of optoelectronic devices by forming oriented
multilayersfromgeneticallyengineeredcysteinemutants.Oriented
multilayers were fabricated by covalent binding of successive
layers of PSI using cross-linking molecules. Photosystem I layers
were bound to metal and transparent conducting semiconductor
electrodes under dry environment. The devices generated
sizable photocurrent and photo voltage. The rate of photocurrent
indicated the formation of a good electronic coupling between
PSI and the electrodes. These devices can serve in the fabrication
of hybrid bio-solid-state optoelectronic devices.
Recent Publications
1. X-M Gong,Y Hochman, T Lev, G Bunker and C Carmeli
(2009) The structure of genetically modied iron–sulfu
rcluster Fx in photosystem I as Determined by X-ray
absorption spectroscopy. Biochimica et Biophysica
Acta 1787:97–104.
2. L Sepunaru, I Tsimberov, L Forolov, C Carmeli, I Carmeli
and Y Rosenwaks (2009) Picosecond electron transfer
from photosysnthetic reaction center protein to GaAs.
Nano Letters 9(7):2751-2755.
3. H Toporik, I Carmeli, I Volotsenko, M Molotskii, Y
Rosenwaks, C Carmeli and N Nelson (2012) Large
photo voltages generated by plant photosystem I
crystals. Advanced Materials 24:2988–2991.
4. Carmeli, I, Kumar, KS, Heifler, O, Carmeli, C and
Naaman R (2014) Spin selectivity in electron transfer
in photosystem I. Angewandte Chemie International
Edition 53:(34) 8953-8958.
Biography
Chanoch Carmeli is a Prof. Emeritus at Tel Aviv University, Israel. He has
served as Chair & Head at the Department of Structural Biology. His re-
search interests include nano-technology of biological molecules, photo-
synthetic reaction center, structural biology (EXAFS) of biological metal can-
ters and proton turbine ATP synthase. He was a Visiting Professor at UCLA,
London University, UCSB, Curie Institute, Roche Institute, Cornell University
and University of California, Berkeley. He has 106 scientific publication and
six patents.
ccarmeli@post.tau.ac.ilFabrication of electronically active hybrid photosynthetic
reaction center proteins and metals
Chanoch Carmeli
1
, Hani Barhum
1
and
Itai Carmeli
2
1
Tel Aviv University, Israel
2
Bar-Ilan University, Israel
Chanoch Carmeli et al., Nano Res Appl, Volume:4
DOI: 10.21767/2471-9838-C1-008