Enhancement of surface enhanced Raman scattering activity of Au nanoparticles through the mesostructured metallic nanoparticle arrays

Surface-plasmon-induced azo coupling reaction between nitro compounds on dendritic silver monitored by surface-enhanced Raman spectroscopy

“…The SERS spectrum of 4-NTP is characterized by major, prominent bands at 1078, 1333, and 1571 cm À1 , which respectively correspond to C-S, N-O, and C-C stretching vibrations. 19,27,28 The SERS results here indicate that when Ag-Ds are densely packed on a GCE, they exhibit a prominent SERS effect. The higher SERS activity of dendritic silver nanostructures was probably caused by their unique morphology and electromagnetic enhancement at sharp edges or/and tips.…”

Adsorption of p-nitrothiophenol on mesostructured polyoxometalate–silicate–surfactant composites containing Au nanoparticles: study of surface-enhanced Raman scattering activity

“…A previous report indicated that the anion in the complex charge-dipole shells of the micelles could be replaced by the AuCl 4 À anion via anion exchange. 17,24 Reduction of the AuCl 4 À anion might result in a reduced charge repulsion of the surfactant head group; this may allow free space to accommodate the Au NPs in the channels. Enhanced GISAXS peak intensities at the same facet (Fig.…”

“…The SERS spectra were obtained using a home-built micro-Raman system. 17 The samples were irradiated with a He-Ne laser system (25 LHR/P 928, CVI Melles Griot) at 632.8 nm with output power up to 35 mW, focusing on samples of diameter 1 mm using a 40Â/0.65 N.A. objective lens (Plan N, Olympus).…”

“…In our previous study, we fabricated thin-lm shape-ordered mesostructured polyoxometalate-silica composites containing Au nanoparticles at the air-liquid interface. 16,17 Using the anion exchange process, AuCl 4…”

“…The composition was used to form free-oating lms of a thermodynamically favored silicatropic phase of two-dimensional (2D) hexagonal packing, as detailed in our previous reports. 16,17,20…”