کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5369954 1388465 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface enhanced Raman scattering of organic sample powders spread over vacuum-evaporated silver thin film
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Surface enhanced Raman scattering of organic sample powders spread over vacuum-evaporated silver thin film
چکیده انگلیسی

Surface enhanced Raman scattering (SERS) from samples prepared by spreading para-nitrobenzoic acid (PNBA) and adenosine powders over silver thin films was achieved. The SERS intensities of the ionized PNBA on the silver film increase with increased applied pressure through a cover-glass and reach a maximum at 0.6 MPa. In contrast, the signals caused by adenosine remain nearly unchanged under applied pressures of 0-0.6 MPa. Beyond 0.6 MPa, the signals attributable to samples decrease in intensity. Atomic force microprobe images reveal that nanometer-scale surface morphology is changed by 0.8 MPa pressure, suggesting that the decrease in SERS intensity is related to pressure-induced morphological changes. Results obtained in this study indicate that SERS spectra are obtainable easily, without solvents, under ambient conditions using dispersion of the sample powder.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 5, 30 December 2006, Pages 2713-2717
نویسندگان
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