Self assembled gold and silver nanoparticulates on silicon nanotips as surface enhanced Raman active substrates
Journal
Materials Research Society Symposium - Proceedings
Journal Volume
788
Pages
81-88
Date Issued
2003
Author(s)
Abstract
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.
Other Subjects
Chemical vapor deposition;Cyclotron resonance;Ethylene;Gold;Raman scattering;Raman spectroscopy;Self assembly;Silicon;Silver;Substrates;Nanoparticulates;Nanotips;Surface enhanced Raman active substrates;Nanostructured materials
Type
conference paper