Evolutive dissipative structures in photopolymerized polyacrylate films

Article Abstract:

The evolutive dissipative structures in the surface of acrylate films were studied during ultraviolet radiation-induced photopolymerization. Self-organization of the structures led to the formation of hexagonal or square cells, waves, stars and spots. These different situations were observed on the same polymer mixture. Findings indicate that the thickness of the sample is an important parameter with regard to the evaluation of the surface deformation properties. The speed at which the sample moves governs the surface viscosity because it modifies the photochemical reaction.

Coatings, Acrylates, Photopolymers

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Differentiating between H and F or H and CN on C(111) or Si(111) surfaces

Article Abstract:

B3LYP analysis of the C(111) and Si(111) surfaces with covalent bonding and measurements of molecule-surface interaction energies indicate differences for H and F or H and CN probes. Differences include the use of an Sc-tipped probe, surface interaction energies, level of interaction with surface atoms and lattice constance size. The H/CN system displayed the best possible results as a data storage system.

Molecular association, Information storage and retrieval systems

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Study of water droplets and films on graphite by noncontact scanning force microscopy

Article Abstract:

It is possible to use an intermittent 'noncontact' mode to image liquid structures adsorbed on solid surfaces under ambient conditions. The key aspect is the development of a dissipative interaction at very short distances.

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