Laser photolysis of silver colloid prepared by citric acid reduction method

Article Abstract:

A colloid consisting of small spherical silver nanoparticles with d(sub p)=8 nanometer (nm) is prepared by irradiating a silver colloid, prepared through the citric reduction methods using the second harmonic of a Nd:YAG laser, lambda = 532nm, with the laser fluence more than about 0.2 joules/cm(super 2). The process of particle formation could be divided into three steps, first, large particles that existed in the initial colloid evaporate fully producing a large amount of silver atom, primary particles with d(sub p)=2-4 nm are formed in mini plumes and these primary particles grow up to 8nm as silver atoms diffuse them through water.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Citric Acid, Optical properties, Silver compounds, Chemical properties, Photolysis

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Mechanisms of electron transfer in two decaheme cytochromes from a metal-reducing bacterium

Article Abstract:

The study explains the electron transfer mechanisms in two decaheme c-type cytochromes obtained from a metal-reducing bacterium. The two cytochromes are shown to exhibit different physiological and tunneling behaviors.

Science & research, Research, Spectra, Electron transport, Cytochromes, Tunneling spectroscopy, Voltage, Electric potential, Structure

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