Answers are grounded in this paper and cite their sources.
The preparation and optical properties of an hexagonal array of ultrasharp tips are demonstrated. The ensemble of nanoprobes exhibits a significant Raman enhancement factor (> 104) when the probe surface is functionalized with a monolayer. From Raman imaging measurements with benzenethiol as a reference molecule, the maximum enhancement effect is clearly localized at the apex of the sharp tips (see image).
No takes yet. Share an insight, caveat, or question.
Guieu et al. (2007) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: