Self assembled gold and silver nanoparticulates on silicon nanotips as surface enhanced Raman active substrates

S. Chattopadhyay*, H. C. Lo, K. H. Chen, C. H. Hsu, L. C. Chen

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

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.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalMaterials Research Society Symposium - Proceedings
Volume788
DOIs
StatePublished - 2003
EventContinuous Nanophase and Nanostructured Materials - Boston, MA., United States
Duration: 1 Dec 20035 Dec 2003

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