Surface structure and interface dynamics of alkanethiol self-assembled monolayers on Au(111)

Article Abstract:

Scanning tunneling microscopy (STM) and high resolution electron energy loss spectroscopy (HREELS) were used to examine the structural transitions and interface dynamics of octanethiol (OT) self-assembled monolayers (SAMs). It was found that the structural transitions of OT SAMs were caused by both the dynamic movement of sulfur atoms on several adsorption sites of the Au(111) surface and the change of molecular orientation in the ordered layer and the annealing process did not modify either the interfacial or chemical structures of the sulfur headgroup.

Sulfur Compounds, Gold Compounds, Electric properties, Scanning tunneling microscopy, Structure, Sulphur compounds

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Calculations of magnesium-nucleic acid site binding in solution

Article Abstract:

The interaction energies of guanine and the dimethyl phosphate anion with a hexahydrated magnesium ion, which represent the main binding modes of magnesium and nucleic acids, were calculated to explore the influence of solvent on metal cations. A method to calculate the total interaction energies applicable for large systems in solution is proposed.

Biological Product (except Diagnostic) Manufacturing, Drugs, Nucleic Acids, Guanine, Magnesium Compounds, Chemical reactions

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