Interfacial Chemistry of Pentacene on Clean and Chemically Modified Silicon (001) Surfaces
| Autor: | Michael P. Schwartz, Xiaoping Cao, Kevin P. Weidkamp, Christina A. Hacker, Robert J. Hamers, and Rudolf M. Tromp |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Chemistry
Photochemistry Surfaces Coatings and Films Pentacene chemistry.chemical_compound X-ray photoelectron spectroscopy Chemisorption Monolayer Materials Chemistry Surface modification Molecule Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Ultraviolet photoelectron spectroscopy |
| Zdroj: | The Journal of Physical Chemistry B. 107:11142-11148 |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/jp035385x |
| Popis: | The interactions between pentacene and the Si(001)-(2 × 1) surface have been investigated using Fourier transform infrared spectroscopy (FTIR), ultraviolet photoelectron spectroscopy (UPS), and X-ray photoelectron spectroscopy (XPS). The pentacene molecules in the first layer react with the Si surface atoms through the CC double bonds and via cleavage of C−H bonds. This chemisorption is accompanied by disruption of the conjugated π electron system. The disrupted interfacial layer is stable throughout deposition and evaporation of thicker pentacene films. Pentacene molecules in layers beyond the first layer adsorb molecularly and yield well-defined valence band features that are characteristic of a conjugated π electron system. Functionalization of the Si surface with a monolayer of cyclopentene inhibits dissociation of subsequently deposited pentacene molecules. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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