Surface-enhanced Raman scattering of 4-aminobenzenethiol on silver nanoparticles substrate

• Published in: Vibrational spectroscopy Vol. 68; pp. 246 - 250
• Main Authors: Santos, Elias de Barros, Sigoli, Fernando Aparecido, Mazali, Italo Odone
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-09-2013
• Subjects: 4-ABT; Band spectra; Deposition; Glass; Nanoparticles; Raman scattering; Raman spectroscopy; SERS; Silver; Silver nanoparticles; Sol gel process; Spectra; 4-ABT; Raman spectroscopy; SERS; Silver nanoparticles
• ISSN: 0924-2031; 1873-3697
• DOI: 10.1016/j.vibspec.2013.08.003

Active surface-enhanced Raman scattering (SERS) silver nanoparticles substrate was prepared by multiple depositions of Ag nanoparticles on glass slides. The substrate is based on five depositions of Ag nanoparticles on 3-aminopropyl-trimetoxisilane (APTMS) modified glass slides, using APTMS sol–gel as linker molecules between silver layers. The SERS performance of the substrate was investigated using 4-aminobenzenethiol (4-ABT) as Raman probe molecule. The spectral analyses reveal a 4-ABT Raman signal enhancement of band intensities, which allow the detection of this compound in different solutions. The average SERS intensity decreases significantly in 4-ABT diluted solutions (from 10−4 to 10−6molL−1), but the compound may still be detected with high signal/noise ratio. The obtained results demonstrate that the Ag nanoparticles sensor has a great potential as SERS substrate.