Electrostatic patterning of a silica surface: A new model for change build-up on a dielectric solid

Article Abstract:

Reproducible electrostatic patterns are obtained on the surface of silica-on-wafer thin films and their formation/relaxation behavior is interpreted using well-known surface electrochemistry phenomena. This shows that the current challenge of reproducing and understanding electrostatic behavior of insulators may be overcome by considering the participation of chemisorption of atmospheric substances in electrostatic charging.

Electric properties, Electrostatics

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Molecular orientation study of methylene blue at an air/fused-silica interface using evanescent-wave cavity ring-down spectroscopy

Article Abstract:

Evanescent-wave cavity ring-down spectroscopy (EW-CRDS) was used to monitor the change in the absorbance of a thin film of methylene blue (MB) at an air/fused silica interface. It was found that at low surface concentrations, the MB molecules lie almost flat on the surface whereas at higher surface concentrations the molecules become vertically oriented.

Methylene blue

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