Controllable organization of a carboxylic acid type gemini surfactant at different pH values by adding copper(II) ions

Article Abstract:

The synthesis of the gemini surfactant sodium 4,8-dioctyl-3,9-dioxo-6-hydroxy-4,8-diaza-1,11-undecanedicarboxylate (SDUC) to characterize its surface activity and aggregation properties at different pH values is described. Remarkable transformations were observed within the SDUC aggregate structures when a small amount of [Cu.sup.2+] ion was added at pH 12.0 and 7.0.

Science & research, Research, Carboxylic acids, Hydrogen-ion concentration, Copper ions, Structure, pH

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Fabrication of highly antireflective silicon surfaces with superhydrophobicity

Article Abstract:

Chemical etching and fluoroalkysilane self-assembly are used as the means to fabricate highly antireflective porous silicon surfaces with superhydrophobicity. The morphology had enabled the porous silicon surface to own a very low reflectance value that is averaged to be about 3% over the whole experimental photon wavelength spanning 300-800 nm.

Analysis, Porous materials, Hydrophobic effect

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The influence of defects on the morphology of Si(111) etched in NH(sub 4)F

Article Abstract:

The effects of wafer miscut and water defects on the morphologies of Si (111) surface etched in NH(sub 4)F are studied by implementing a kinetic Monte Carlo (KMC) simulation. The defects result in persistent pit initiation, which leads to the formation of multilevel stacked pits.

Fluorides, Simulated annealing (Mathematics), Ammonium compounds, Ammonium chloride, Ammonium paratungstate, Ammonium salts

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