کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9582168 | 1505183 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Raman studies of rhodamine 6G and crystal violet sub-monolayers on electrochemically roughened silver substrates: Do dye molecules adsorb preferentially on highly SERS-active sites?
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The enhancement factors in surface-enhanced Raman scattering (SERS) are significantly different for molecules adsorbed on different sites. We show that on electrochemically roughened silver substrates dye molecules preferentially adsorb at highly SERS-active sites (probably slits between metal nanoparticles). Our results suggest that even such large molecules as rhodamine 6G and crystal violet can locate themselves into highly SERS-active sites not only during rearrangement of the metal nanoparticles (this mechanism is likely for metallic sols) but can also diffuse into already existing highly SERS-active sites. The number of such sites is small, however, they provide very high surface enhancement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics Letters - Volume 414, Issues 4â6, 14 October 2005, Pages 271-275
Journal: Chemical Physics Letters - Volume 414, Issues 4â6, 14 October 2005, Pages 271-275
نویسندگان
Andrzej Kudelski,