Control of the interchain [pi]-[pi] interaction and electron density distribution at the surface of conjugated poly(3-hexylthiophene) thin films
Article Abstract:
A combination of near edge X-ray absorption fine structure spectroscopy (NEXAFS), ultraviolet photoelectron spectroscopy (UPS) and penning ionization electron spectroscopy (PIES) with different surface sensitivities are used for examining the surface electronic structure of poly(3-hexylthiophene) (P3HT) thin films coated with various coating parameters. It is shown that the interchain [pi]-[pi] interaction and the distribution of the electron density contributed from the polymer backbone can be controlled in the surface region of thin films by varying the coating parameters.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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Radiation damage to alkyl chain monolayers on semiconductor substrates investigated by electron spectroscopy
Article Abstract:
An investigation on monolayers of alkyl chains, attached through direct Si-C bonds to Si(111), through phosphonates to GaAs(100) surfaces, or deposited as alkyl-silane monolayers on SiO2 is conducted by ultraviolet and inverse photoemission spectroscopy and X-ray absorption spectroscopy. Exposure to ultraviolet radiation from a He discharge lamp, or to a beam of energetic electrons, leads to significant damage, presumably associated with radiation- or electron-induced H-abstraction leading to carbon-carbon double-bond formation in the alkyl monolayer.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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