Surface-enhanced Raman spectra using silver-coated paper substrates

✍ Scribed by Arthur S. L. Lee; Ying-Sing Li

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 483 KB
• Volume: 25
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/jrs.1250250304

✦ Synopsis

Abstract

Because of the importance of developing an active substrate for surface‐enhanced Raman (SER) spectroscopic applications, a silver‐coated filter‐paper substrate was prepared for surface‐enhanced Raman scattering (SRS) by using a chemical reduction method at room temperature. Optimization of the silver deposition time was achieved by using p‐nitrophenol (PNP) as an analyte. Its performance as an SERS‐active substrate was tested using PNP, p‐chlorobenzoic acid, m‐chlorobenzoic acid and o‐chlorobenzoic acid. To overcome the problem of low enhancement when a dipping method was adopted for sample applications, a silver‐coated alumina‐based substrate was prepared. The new substrate was found to exhibit strong SERS with both the solution and the dipping methods for sample applications of PNP. Using the new substrate, the limit of detection for methyl red was estimated to be 3 ng ml^−1^.