Investigation of the stability of graphite particle dispersion and the hemimicelle formation process at graphite/solution interfaces using Atomic Force Microscopy

Article Abstract:

The correlation between the dispersion stability of graphite particles suspended in aqueous solutions of dodecyldimethylhydroxylammonium chloride and the structure of the adsorption layer on the graphite surface is investigated by a combination of data from Atomic Force Microscopy (AFM) images, measurements of interaction forces, an adsorption isotherm, and turbidity measurements of graphite suspensions. A model for the two-step adsorption mechanism is applied to describe the adsorption isotherm.

Methods, Adsorption, Graphite, Chemical properties

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Prostasome self-fusion studied by atomic force microscopy

Article Abstract:

Atomic force/lateral force microscopy (AFM/LFM) and the transfer of a lipophilic fluorescent dye (octadecylrhodamine G, R(sub 18)) are used to study the morphology and fusion of human prostasomes at pH values ranging between 5 and 8. The AFM/LFM characterization revealed the smoothness of the prostasome surface and showed that the larger vesicles were fused prostasomes, as also indicated by the relief of R(sub 18) self-quenching.

Fluorescent chemicals

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Characterization of individual submicron distyrylbenzene aggregates using temperature-dependent picosecond fluorescence and atomic force microscopy

Article Abstract:

The time-resolved fluorescence of individual distyrylbenzene aggregates is studied in order to determine the effects of aggregate morphology on the emission properties. All aggregates show temperature-dependent fluorescence decays and spectral shifting, most likely due to activated energy transfer to lower energy sites, which correspond to spectrally distinct species.

Fluorescence, Energy transfer

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