Illumination-induced charge transfer in polypyrrole–diamond nanosystem |
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Authors: | J. Čermák A. Kromka M. Ledinský B. Rezek |
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Affiliation: | Institute of Physics, ASCR, v.v.i., Cukrovarnická 10, 16200 Prague, Czech Republic |
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Abstract: | Charge transfer in polypyrrole–diamond system is studied by conductivity measurements of a channel made of H-terminated diamond in the dark and under illumination. Micrometer-sized channels of conductive hydrogen-terminated diamond are lithographically fabricated on the surface of monocrystalline intrinsic diamond crystal by selective oxygen plasma treatment. The channels are interrupted by electrochemically synthesized micrometer-sized polypyrrole clusters. Similar characterizations are performed on channels interrupted by surface oxidation. Based on the increase and spectral response of the photo-current in the system, doping of diamond by charge carriers from polypyrrole is deduced. |
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