کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5426104 | 1395877 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Configuration of pentacene (C22H14) films on Si(1 0 0)-2 Ã 1 studied by NEXAFS Configuration of pentacene (C22H14) films on Si(1 0 0)-2 Ã 1 studied by NEXAFS](/preview/png/5426104.png)
Pentacene films on Si(1 0 0)-(2 Ã 1) surface at 300 K were investigated using near edge X-ray absorption fine structure (NEXAFS) at the carbon K-edge. NEXAFS spectra show that pentacene molecules are chemisorbed on the Si(1 0 0)-(2 Ã 1) surface for monolayer with flat-laying and predominantly physisorbed on the Si(1 0 0)-(2 Ã 1) surface for multilayer films with an upright molecular orientation. Absorption angle of pentacene molecules were measured through Ïâ transition. The angles between the double bond and the silicon surface were 35-55°, 65° and 76° at monolayer, 24 and 48 nm pentacene deposited on the Si(1 0 0) surface, respectively. We observed that the intermediate flat-laying phase is favored for monolayer coverage, while the films of molecules standing perpendicular to the Si(1 0 0) surface are favored for multilayer coverage.
Journal: Surface Science - Volume 601, Issue 6, 15 March 2007, Pages 1456-1460