Adsorption Geometry of Anthracene and 4-Bromobiphenyl on TiO2(110) Surfaces

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• 作者：Denis V. Potapenko ; Nicholas J. Choi ; Richard M. Osgood
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：November 18, 2010
• 年：2010
• 卷：114
• 期：45
• 页码：19419-19424
• 全文大小：373K
• 年卷期：v.114,no.45(November 18, 2010)
• ISSN：1932-7455

文摘

Adsorption of anthracene and 4-bromobiphenyl on a TiO₂ rutile(110) surface has been studied under ultrahigh vacuum conditions with scanning tunneling microscopy (STM) and thermal programmed desorption (TPD). Multilayer and single-layer desorption peaks were observed at 270 and 360 K for anthracene and at 260 and 360 K for bromobiphenyl, respectively. STM images taken at room temperature show that both molecules form periodic patterns on the TiO₂ surface with individual molecules aligned along the 5-coordinated Ti atom row of the substrate. Individual molecules of the organic adsorbates are mobile on the surface in the [001] direction parallel to the atomic rows. The observed lateral alignment of the molecules suggests attractive interactions in the case of anthracene and repulsive in the case of bromobiphenyl.