کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
26723 | 43973 | 2011 | 6 صفحه PDF | دانلود رایگان |
It is normally difficult to use surface enhanced Raman scattering (SERS) to study molecular adsorbates at well-defined planar metal surfaces or at Pt-group catalytic metal surfaces. In this paper, highly localized gap-mode plasmons are excited on atomically smooth metal surfaces by using a sphere-plane type plasmonic cavity. This method enables us to observe Raman scattering signals from molecular adsorbates on various single crystalline metal surfaces including non-SERS-active Pt and Pd. SERS spectra of self-assembled isocyanide monolayers on several metal substrates with (1 1 1) or (1 0 0) orientation reveal a significant orientation dependence of preferential adsorption sites, which information is hardly obtainable from conventional SERS spectra.
► A sphere-plane plasmonic cavity is applied for SERS observation.
► This method enables us to observe SERS even at a highly damping Pt or Pd surface.
► This method provides us crystal orientation dependent SERS information.
► The advanced SERS technique is useful for studying metal–molecular interactions.
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 221, Issues 2–3, 25 June 2011, Pages 175–180