کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9595107 | 1507966 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ion desorption of surface-oriented methyl-ester compounds using a self-assembled monolayer by core-electron excitations: Polarization-dependence measurements
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کلمات کلیدی
Ion emission - انتشار یونSelf-assembled monolayer - تک لایه ی خودمختارDesorption induced by electronic transition (DIET) - جذب ناشی از انتقال الکترونیکی (رژیم غذایی)Surface photochemistry - فتوشیمی سطحیPhoton stimulated desorption (PSD) - فوتون تحریک جذب (PSD)Near edge X-ray absorption fine structure (NEXAFS) - نزدیکی لبه اشعه ایکس جذب ساختار خوب (NEXAFS)
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ion desorption of surface-oriented methyl-ester compounds using a self-assembled monolayer by core-electron excitations: Polarization-dependence measurements Ion desorption of surface-oriented methyl-ester compounds using a self-assembled monolayer by core-electron excitations: Polarization-dependence measurements](/preview/png/9595107.png)
چکیده انگلیسی
Polarization dependence of photodesorbing ions by carbon and oxygen core-electron excitations of methyl-ester terminated self-assembled monolayers have been investigated using existing time-of-flight mass spectrometer combined with additional correction electrodes at both sides of the sample holder, which apply an appropriate potential gradient for desorbing ions. Ions which desorb site selectively indicate significant polarization dependence. On the other hand, non-selective ions rarely show the dependence. These findings indicate that site-selective ion desorption takes place only within the functional group where core electron is excited and the initial memory of the core excitation is effectively conserved during desorption. Trends of the polarization dependence differ in desorbing ions as well as resonant excitations. Variation of the dependence can be understood by the different superiority of dissociation/desorption mechanisms: direct dissociation induced by core excitation and indirect dissociation caused by rapid energy relaxation and X-ray-induced electron stimulated desorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 593, Issues 1â3, 20 November 2005, Pages 283-290
Journal: Surface Science - Volume 593, Issues 1â3, 20 November 2005, Pages 283-290
نویسندگان
Shin-ichi Wada, Ryohei Sumii, Hiroyuki Kizaki, Yoichi Iizuka, Yoshihiro Matsumoto, Tetsuji Sekitani, Kenichiro Tanaka,