Abstract
We report a technique for preparing metal particles of prolate spheres for surface enhanced Raman scattering (SERS) measurements. The technique is a variation of one described by Liao in which prolate silver particles were formed on a regular array of SiO2 posts made be reactive-ion etching a thermally grown SiO2 layer on silicon. In the present study we have used transparent fused quartz as substrates to permit optical absorption measurements. Large patterned areas (6 cm2) with a high density of posts (60/μm2) have been obtained by using silver islands as etch masks. Good SERS spectra have been obtained for benzoic acid on gold and silver microstructures in the 100 nm range produced by this method with helium-neon laser excitation as low as 0.7 mW.
| Original language | English |
|---|---|
| Pages (from-to) | 225-232 |
| Number of pages | 8 |
| Journal | Chemical Physics |
| Volume | 106 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jul 15 1986 |
Funding
* Research sponsored by the Department of the Army under Interagency Agreement Nos. DOE 40-1294-82 and ARMY 3311-1450 and the Office of Health and Environmental Research, U.S. Department of Energy under contract DE-AC05-840R21400 with Martin Marietta Energy Systems, Inc. ’ Present address: Laboratoire de Photo&ctricite, Faculte des Sciences, Universite de Dijon, 21004 Dijon, France. ’ Present address: Physics Department, Osaka Kyoiku Univer-sity, Tennoji, Osaka, Japan.