Prof. Carmeli Chanoch

  
Affiliation:Department Of Biochemistry, The George S.Wise faculty of life sciences
Tel:  (972)-3-6409826
(972)-3-6415053
 
Fax: (972)-3-6406834
 
Email: ccarmeli@tau.ac.il
 
Personal Website:

 
Postal Address:Department of Biochemistry
The George S.Wise faculty of life sciences

Tel Aviv University
Tel Aviv 69978

Research Interest

Application of The Photosynthetic Reaction Center Proteins, PS I in the Fabrication of a Novel Nano-Bio-Photovoltaic Devices.

Photovolteic devices are fabricated by assembling the highly efficient photosynthetic reaction center protein in solid state scaffolds. The assembly of the soft protein-made photosystem I (PS I) into a solid state scaffold without damaging the activity is very challenging therefore the robust chlorophyll-protein PS I reaction centerfrom cyanobacteria was selected. Induction of cysteine mutants in the outer loops of this membrane protein enabled fabrication of oriented self assembled monolayer by formation of sulfide bonds to metal electrodes as determined by AFM. In the biological membranes the efficient PS I generates light-induced vectorial charge transfer across nano size protein creating a potential of 1 V in 200 ns at quantum efficiency of 1 and energy conversion efficiency of 58%. It was found that the self assembled dry PS I retained its activity as it generated a reversible photovoltage of 1 V as measured by KPFM1,2. A photocurrent of 0.35A/cm2 was measured when the oriented self assembled monolayer of PS I on metal electrode was capsulated in a nitride micro cell and toped with the transparent indium tin oxide electrode. These photovoltaic devices are being used for development of cost effective solar cells. It can be applied in the development of bio-nano-photo-sensors, in artificial vision and as photo-switches in molecular electronics.

 

Light induced charge separation in protein-chlorophyll reaction center-PS I drives current in a solid state scaffold. The nano-particles are attached to bottom metal electrode inside a nano-cavity drilled in a Si3N4 layer. A conductive and transparent protective InSnO2 is sputtered on top.

Selected Publications


  • Frolov, L.; Rosenwaks, Y.; Carmeli, C.; Carmeli, I. Fabrication of Photo-Electronic Device by Direct Chemical Binding of the Photosynthetic Reaction Center Protein to Metal Surfaces. Adv. Mater. 2005, 17, 2434-2437.
  • Pending # 60/654,502, (2005) Fabrication of nano-photoelectrical device from photosystem I.