Generation of Porous Alumina Layers in a Polydimethylsiloxane/Hydrogen Peroxide Medium on Aluminum Substrate in Corona Discharges

The porous alumina (Al2O3) layer obtained at the interface between polydimethylsiloxane/hydrogen peroxide medium and aluminum substrate under charged and neutral species injection produced in negative corona discharges in air at atmospheric pressure is analyzed by different methods in this paper. The scanning electron microscopy investigations showed the uniform distribution of the pores formed in the alumina layer and their columnar structures. Both energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) measurements indicate that during the anodization process of the aluminum in the polydimethylsiloxane/hydrogen peroxide medium in corona discharge the incorporation of silicon in the structure of the alumina layer is possible

Infrared spectral investigation of the linseed oil polymerization in a corona discharge in air at atmospheric pressure

In this paper we have demonstrated that the negative and positive corona discharge in air at atmospheric pressure is a convenient physical method for the initiation of the high-reaction-rate polymerization process of the linseed oil. The different stages of the polymerization process were investigated by infrared (IR) spectroscopy and the formation of the linseed oil polymer was evaluated by the presence of the \chem{C}-\chem{O}-\chem{C} bands

Potentiometric characterisation of a dual-stream electrochemical microfluidic device

A microfluidic device is presented with offchipelectrodes residing in a reservoir and connected viamicro-capillaries to the Y-shaped microfluidic channel.The device is tested by potentiometric measurementsinvolving dual-stream laminar flow of two aqueoussolutions carrying different electrolytes at various concentrations.Open circuit potentials are measured for aseries of solutions of alkali metal chlorides and tetraalkylammoniumchlorides as well as for dilute hydrochloricacid. The open circuit potential for the microfluidic chipwas calculated by taking into account the diffusionpotential at finite ionic strength as well as the potentialdifference introduced by the reference electrode system.The liquid junction potential developed at the boundary ofthe co-flowing aqueous solutions may be manipulated tohave greater or lesser relative contributions to the measuredopen circuit potential based on use of electrolyte saltshaving cation and anion pairs of similar or dissimilarmobilities in solution. A reasonable agreement betweentheoretical and experimental values of the open circuitpotential is observed for these situations. The results showthat simple microfluidic structures possess a rich environmentfor exploration and application of the solutionchemistry of ions