Charge Transfer and Molecular Orientation of Tetrafluoro-tetracyanoquinodimethane on a Hydrogen-Terminated Si(111) Surface Prepared by a Wet Chemical Method
Citations Over TimeTop 13% of 2010 papers
Abstract
We investigated the chemical state and molecular orientation of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) adsorbed on a hydrogen-terminated Si(111) (1 × 1) surface using transmission infrared (IR) spectroscopy. We deposited F4-TCNQ molecules on H−Si(111) by a wet chemical method. Similar to evaporated F4-TCNQ molecules on various substrates in vacuum, we observed anionized F4-TCNQ on the H−Si(111) substrate. The incident angle dependence of the IR spectra reveals that this F4-TCNQ anion lies flatly on the surface. On the other hand, minority neutral F4-TCNQ species assume random orientation, judging from the comparison between s- and p-polarized IR spectra. We conclude that the first layer on the H−Si surface is a flat-lying anion species and the upper layers consist of randomly oriented neutral molecules.
Related Papers
- → Characterization of Z-DNA by Infrared Spectroscopy(2023)4 cited
- → The study of some normal and abnormal montmorillonites by thermal analysis and infrared spectroscopy(1987)8 cited
- → Chapter 3 Theory of infrared spectroscopy(2001)4 cited
- → The infrared spectrum of gaseous Sb4O6(1993)9 cited
- → Molecular Orientation Analysis in Organic Thin Films by Infrared Spectroscopy(2007)2 cited