Tuning the alignment of pentacene on copper substrate by annealing-assistant surface functionalization*
| Autor: | Haipeng Xie, Yongli Gao, Qun Wang, Wei-Dong Dou, Shuang Wen, Bi-Yun Shi, Cong-Rong Lu, Qiao-Jun Cao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Annealing (metallurgy) General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Pentacene Metal chemistry.chemical_compound Adsorption Molecular geometry Chemical engineering chemistry visual_art 0103 physical sciences visual_art.visual_art_medium Molecule Surface modification Thin film 010306 general physics 0210 nano-technology |
| Zdroj: | Chinese Physics B. 29:076801 |
| ISSN: | 1674-1056 |
| Popis: | Controlling the alignment and packing structure of organic molecules on solid substrate surfaces at molecule level is essential to develop high-performance organic thin film (OTF) devices. Pentacene, which is a typical p-type semiconductor material usually adopts lying-down geometry on metal substrates owning to π–d coupling between pentacene and metal substrates. However, in this study, we found that pentacene molecules can be adsorbed on an anneal-treated Cu (111) surface with their long axis perpendicular to substrate surface. Highly ordered single-layer pentacene film with stand-up molecular geometry was achieved on this substrate. It was found that the functionalization of Cu surface with C = O groups due to annealing treatment should be accounted for standing-up geometry of pentacene on Cu substrate. This observation shed light on the tuning of the alignment and packing structure of organic molecules. |
| Databáze: | OpenAIRE |
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