Vertical graphene nanoflake integrated films having a high density of edge planes have been used as an electrochemical platform to systematically investigate the immobilization, electrochemical oxidation kinetics and direct quantitative determination of natural DNA. Consistently, both transmission electron microscopy and atomic force microscopy observations demonstrate the presence of a self-as...

An anti-fouling ability of diamond-like carbon (DLC) electrodes to biological macromolecules has been investigated from a decrease in the electrochemical redox current of Fe(CN)(6)(4-/3-), used as a redox marker. A DLC electrode and a glassy carbon (GC) electrode were immersed in a solution containing bovine serum albumin (BSA) or DNA. The GCs treated with biological macromolecules gave rise to...

A versatile strategy for electrochemical determination of glycoalkaloids (GAs) was developed by using a carbon nanotubes-phenylboronic acid (CNTs-PBA) modified glassy carbon electrode. PBA reacts with α-solanine and α-chaconine to form a cyclic ester, which could be utilized to detect GAs. This method allowed GA detection from 1 μM to 28 μM and the detection limit was 0.3 μM. Affinity interacti...

A sensitive electroanalytical method for quantification of pheniramine in pharmaceutical formulation has been investigated on the basis of the enhanced electrochemical response at glassy carbon electrode modified with multi-walled carbon nanotubes in the presence of sodium lauryl sulfate. The experimental results suggest that the pheniramine in anionic surfactant solution exhibits electrocataly...

Electrochemical reduction of complexes of monochlorosilanes with redox-active ligands such as 2,2'-bipy occurs in one-electron fashion at moderately negative potentials, E @ -1 V vs SCE (in CH3CN/0.1 M Bu4NBF4), leading to silyl radicals. These radicals, trapped with a-phenyl-N-tbutyl-nitrone and characterized as spin-adducts by ESR spectroscopy, add to carbon interfaces (glassy carbon, graphit...

Photostructural change of glassy As2Se3 was simulated on an experimentally credible model with excited electronic dynamics within first-principles molecular dynamics. Bond breaking and bond switching reactions account for local changes around defect sites at the short time phase of illumination. For long-time relaxation, defect pairs associated with band tail states become involved in a rearran...