CHED 1450 |
| The surface-mediated photoreduction of p-nitrobenzoic acid (PNBA) has been observed on mixed AgxAu(100-x) nanoparticle coated surfaces. The AgxAu(100-x) nanoparticles were prepared by first preparing a “seed” colloid (Au or Ag), followed by reducing the Au or Ag onto the seed particle. Mixed AgxAu(100-x) nanoparticles were then bound to glass substrates via mercaptopropyl trimethoxy silane. The photoreduction of PNBA to azodibenzoic acid on the mixed nanoparticle slides was monitored using a 633 nm He-Ne laser, which was also used to initiate the reaction. We found that the mixed Ag/Au nanoparticle does enhance the SERS signal. Furthermore, larger fractions of Ag gave better SERS enhancement. |
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Undergraduate Research Poster Session: Physical Chemistry
2:00 PM-4:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster
Division of Chemical Education |