کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9595581 | 1507979 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ex-situ prepared films of 4-aminothiophenol on Au(1Â 1Â 1): photoemission, NEXAFS and STM measurements
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ex-situ prepared films of 4-aminothiophenol on Au(1Â 1Â 1): photoemission, NEXAFS and STM measurements Ex-situ prepared films of 4-aminothiophenol on Au(1Â 1Â 1): photoemission, NEXAFS and STM measurements](/preview/png/9595581.png)
چکیده انگلیسی
Ex-situ prepared films of 4-aminothiophenol (4-ATP) on Au(1Â 1Â 1) have been studied by core-level photoemission using synchrotron radiation, ultra-high-vacuum scanning tunneling microscopy and spectroscopy (UHV-STM, STS), and X-ray absorption (NEXAFS). Photoemission measurements suggest that the film contains a relatively low percentage of 4-ATP bonded to the Au surface, with the presence of free 4-ATP, with oxidised and possibly dimerised molecules also present. We find a lower oxide content than has previously been observed, with well-resolved STM images. These images show a disruption of the long range order of the Au(1Â 1Â 1)-(22Â ÃÂ â3) reconstruction, with local nucleation of the reconstruction apparently induced by the 4-ATP, and bias-dependent contrast images. This latter effect, together with the asymmetry observed in STS, is ascribed to the presence of oriented molecular dipole layers between the metal and the organic material. NEXAFS data suggest a broadly upright geometry, with, however, considerable uncertainties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 580, Issues 1â3, 10 April 2005, Pages 63-70
Journal: Surface Science - Volume 580, Issues 1â3, 10 April 2005, Pages 63-70
نویسندگان
V. Arima, F. Matino, J. Thompson, R. Cingolani, R. Rinaldi, R.I.R. Blyth,