The spin-label method has been used to study the structure and molecular motion of polystyrene chains adsorbed on porous silica. Spin-labelled polystyrene (PS) with a narrow molecular weight distribution, having 5 Mw (weight average molecular weight) = 1.9 x 10 was adsorbed on the surface of porous
Angular motion of molecular adsorbates influenced by surface coverage
✍ Scribed by P. Parneix; M. Büchner; G. Raşeev; N. Halberstadt
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 494 KB
- Volume
- 233
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Using classical dynamics, we show that the angular motion of an adsorbate is strongly modified by the surface coverage. Increasing this coverage from submonolayer to monolayer changes the mean angles and rigidifies the structures about the azimuthal angle. Consequently, lateral interaction, including an angular term, should be taken into account in dynamical studies of adsorbates. These conclusions were reached in the particular case of CO/Ar( 100) but we believe that they are valid for other systems.
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