Abstract
The authors report that monolayers of pentacene grown on a functionalized polymeric substrate display high uniformity that enable observations of Raman spectra of low-lying optical vibrations. The evolution of the frequencies and widths of the modes has been studied in films reaching the single monolayer level. Raman spectra of low-lying lattice modes display major changes when the film thickness changes from 1 to 2 monolayers, revealing that a phase akin to a thin film phase of pentacene already emerges in films of only 2 monolayers.
Original language | English |
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Article number | 223310 |
Journal | Applied Physics Letters |
Volume | 94 |
Issue number | 22 |
DOIs | |
State | Published - 2009 |