Member Profile
Name: Arun Narasimhan
Country: India
City: Bangalore
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Career Stage: Retired
Research and Special Interests: Bacteriorhodopsin (bR), a membrane protein, is a light driven proton pump. The ground state (B-state) of bR has a broad absorption centered around 570 nm. Upon photo-excitation of bR, a series of events take place. A proton is translocated from the cytoplasmic side of bR to the extracellular side.The most stable intermediate in this photo-cycle is the M-state (corresponding to de-protonated state of bR) with an absorption maximum around 410 nm. Tradiationally, polymers have been considered insulating. Recently, it was found out that polymers with an alternate single and double bonds have been found to be semiconducting, whose semiconducting properties can me modified by doping with ions (Nobel Prize-;Chemistry 2000). Optical excitation of these polymers is possible, since they have their band gap in the optical range. These polymers are soluble in common organic solvents, hence easy to process. My work involves the study of the synergistic processes occurring the membrane protein-conjugated polymer based structures. The optical excitation of the membrane protein changes the oxidation state of the polymer. The characterization of the interface, the study of the oxidation state of the polymer, its change due to the protein photo-cycle forms the major part of my research.
Area of Expertise: Near field microscopy, Molecular Electronics and Soft Matter
Years of Expertise: 1-5
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‎12-15-2020 04:26 AM