Multiple proton-transfer reactions in DNA base pairs by coordination of Pt complex

Article Abstract:

The possibility of multiple proton-transfer reactions in DNA base pairs due to coordination of cisplatin is theoretically determined by density functional theory (DFT) and by quantum mechanics/molecular mechanics (QM/MM) methods with an ONIOM method. The energetics of two base pairs with the cisplatin confirm that the Pt complex is likely to bind in the order cis-(CG)-Pt-(GC), cis-(CG)-Pt-(AT), cis-(TA)-Pt-(AT), where G, C, A, and T are guanine, cytosine, adenine and thymine, respectively and the Pt atom bonds to the [N.sub.lau] site of G and A.

Quantum theory, Quantum mechanics, Molecular dynamics, Density functionals, Density functional theory, Chemical properties

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Highly density germanium nanowires assemblies: Contact challenges and electrical characterization

Article Abstract:

The conductive properties of vertically aligned germanium nanowires, with mean diameters of 50 and 100 nm, within anodized aluminum oxide (AAO) templates are characterized by conductive atomic force microscopy (C-AFM) and macrocontact measurements. C-AFM was used to determine the electrical transport properties of individual nanowires within the arrays, while macrocontacts were used to measure the mean current-voltage characteristics of groups of nanowires.

Science & research, Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Germanium, Research, Electric properties, Nanotechnology

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Spatial and mechanical properties of dilute DNA monolayers on gold imaged by AFM

Article Abstract:

Tapping-mode atomic force microscopy (AFM) is used to visualize the distribution of DNA molecules on the surface and to study the mechanical properties of individual molecules. The study aimed to create spatially distributed deoxyribonucleic acid on a gold surface using a one step preparation method. It was found that both duplex and single-stranded DNA molecules extend approximately vertically upward from the surface.

Usage, Molecules

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