Measurement of electrostatic potentials above oriented single photosynthetic reaction centers

Article Abstract:

It has been possible to make direct measurements of photovoltages produced by a single photosystem I (PS I). This research used the technique of Kelvin force probe microscopy in the heterostructure made up of PS I, 2-mercaptoethanol and atomically flat gold.

Analysis, Photosynthesis research, Electrostatics

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Molecular photovoltaics and surface potentials at the air-water interface

Article Abstract:

The quantitative light-induced electrostatic measurements of photosystem I (PSI) reaction centers using atomic force microscope (AFM) and the scanning surface-potential microscope (SSPM) is reported. The results indicate that the surface dipole forces and orientation of water molecules causes a net interfacial orientation of PSI molecules and light-induced surface potential that is related to the PSI concentration and photoactivity.

Usage, Photosynthesis

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Imaging nanometer metallocatalysts formed by photosynthetic deposition of water-soluble transition-metal compounds

Article Abstract:

A method of imaging nanometer metallocatalysts formed by photosynthetic precipitation of the water-soluble transition-metal compounds [PtCl(sub 6)](super 2-) and [RuCl(sub 6)](super 2-) is reported. The use of this method can potentially create nanometer-sized Pt and/or bimetallic catalysts on biomembranes and molecules at pH 7 and room temperature with preservation of the biological function of the molecules.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Platinum, Ruthenium, Electric properties, Spectra

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