Silicon nanotips, grown via electron cyclotron resonance plasma chemical vapour deposition, with apex diameters of ∼2nm and lengths of 1000 nm and densities of 1011/cm2 were used as a new substrate for surface enhanced Raman spectroscopy. Ion beam sputtered gold and silver self assemble on these substrates as nanoparticulates of 4-10 nm diameter and these metallic nanoparticulates assist in the surface enhancement of Raman signals of analytes. Molecules such as Rhodamine 6G and bis-Pyridyl ethylene of varied concentrations, in the range of 10-6-10-10 M, has been studied on these substrates and enhancements in the range of 10 6-108 were observed.
|Number of pages||8|
|Journal||Materials Research Society Symposium - Proceedings|
|State||Published - 2003|
|Event||Continuous Nanophase and Nanostructured Materials - Boston, MA., United States|
Duration: 1 Dec 2003 → 5 Dec 2003