Abstracts

Chemicals, plastics and rubber industries

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Self-diffusion of supercooler o-terphenyl near the glass transition temperature

Article Abstract:

Self-diffusion coefficients for the low molecular weight glass former o-terphenyl are investigated near T(sub g) by isothermally desorbing thin film bilayers of deuterio and protio o-terphenyl in a vacuum chamber. Translational diffusion that is about 100 times faster at T(sub g) + 3 k than the Stokes-Einstein prediction are observed.

Analysis, Deuterons

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Ionization energy and electronic structure of polycytidine

Article Abstract:

Ribonucleic acid (RNA) polycytidine (poly rC) homopolymer thin film was prepared on highly ordered pyrolytic graphite (HOPG) with electrospray (ES) deposition in a vacuum. The larger ionization energy of poly rC results in a larger hole injection barrier and a smaller electron injection barrier relative to the HOPG Fermi level.

Science & research, Research, RNA, Structure

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Dielectric signature of a dead layer in ultrathin films of a nonpolar polymer

Article Abstract:

Extremely thin films of poly(styrene) which exhibit the phenomenon of continuous increase of the capacitance with temperature and a gradual defreezing of the interfacial zone between the dead layer and the bulk is demonstrated.

Unsupported plastics film & sheet, Polystyrene Film, Unsupported Plastics Film and Sheet (except Packaging) Manufacturing, Measurement, Thermal properties, Capacitance

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