| Yazarlar (6) |
E. Mete
Balikesir Üniversitesi, Turkey |
|
I. Demiroǧlu
Middle East Technical University (METU), Turkey |
|
Dr. Öğr. Üyesi Erol ALBAYRAK
Kırşehir Ahi Evran Üniversitesi, Türkiye |
|
G. Bracco
Università degli Studi di Genova, Italy |
|
Ş Ellialtioǧlu
Middle East Technical University (METU), Turkey |
|
M. F. Danişman
Middle East Technical University (METU), Turkey |
| Özet |
| Here we present a structural study of pentacene (Pn) thin films on vicinal Ag(111) surfaces by He atom diffraction measurements and density functional theory (DFT) calculations supplemented with van der Waals (vdW) interactions. Our He atom diffraction results suggest initial adsorption at the step edges evidenced by initial slow specular reflection intensity decay rate as a function of Pn deposition time. In parallel with the experimental findings, our DFT+vdW calculations predict the step edges as the most stable adsorption site on the surface. An isolated molecule adsorbs as tilted on the step edge with a binding energy of 1.4 eV. In addition, a complete monolayer (ML) with pentacenes flat on the terraces and tilted only at the step edges is found to be more stable than one with all lying flat or tilted molecules, which in turn influences multilayers. Hence our results suggest that step edges can trap Pn molecules and act as nucleation sites for the growth of ordered thin films with a crystal structure similar to that of bulk Pn. © 2012 American Chemical Society. |
| Anahtar Kelimeler |
| Bildiri Türü | Tebliğ/Bildiri |
| Bildiri Alt Türü | Poster Olarak Sergilenen Tebliğ (Uluslararası Kongre/Sempozyum) |
| Bildiri Niteliği | Web of Science Kapsamındaki Kongre/Sempozyum |
| Bildiri Dili | İngilizce |
| Kongre Adı | ROCAM 2012 |
| Kongre Tarihi | 08-08-2012 / |
| Basıldığı Ülke | |
| Basıldığı Şehir |
| Atıf Sayıları | |
| WoS | 11 |
| SCOPUS | 13 |
| Google Scholar | 17 |
