Adsorption of phenylacetylene on gold nanoparticle surfaces investigated by surface‐enhanced Raman scattering

Abstract

The adsorption of phenylacetylene (PA) on gold nanoparticle surfaces was investigated by means of surface-enhanced Raman scattering (SERS). The aggregation behaviors were examined by UV-visible absorption spectroscopy and transmission electron microscopy. The phenyl ring of PA appeared to assume a perpendicular orientation with respect to the gold surface from the presence of the n(CH) band at ∼3060 cm −1 . Neither a substantial red shift nor a significant band broadening of the ring breathing modes implied that a direct ring p-orbital interaction from the phenyl ring with gold substrates should be low. The SERS spectrum of PA on Au surfaces was analyzed by determining the relative enhancement factor of each vibrational band. The multiple peaks in the n(C C) stretching region were found to vary in the presence of other ionic species.

TeTe cleavage of aromatic ditellurides on silver and gold surfaces

“…19 Only for the ordinary Raman (OR) spectrum of DNDT, near-infrared irradiation at 1064 nm from a Bruker RFS 100/S FT-Raman spectrometer was used to avoid strong fluorescence. All the SERS spectra in this work were taken in static conditions.…”

In situ Raman monitoring triazole formation from self-assembled monolayers of 1,4-diethynylbenzene on Ag and Au surfaces via “click” cyclization

“…3c. The Raman signal intensity of the ν(C≡C) free band unbound to the surface appeared to be larger on colloidal nanoparticle surfaces than on roughened surfaces [29]. It would presumably result from different adsorption behaviors of 1,4-DEB, ascribed to different crystal structure and surface morphology between nanoparticles and roughened plates.…”

“…The concentration of the 1,4-DEB at ∼10 −3 M should be much higher than that required for its monolayer coverage [22]. Consulting the earlier vibrational assignments [29,30], the Raman spectrum was analyzed. The in-plane benzene ring modes appeared at ca.…”

Adsorbed states of substituted α‐aminophosphinic acids on a silver electrode surface: comparison with a colloidal silver substrate

“…Wavenumbers and proposed band assignments for SERS spectra of the investigated di-α-amino (L 1 -L 3 ) and α-amino-α-hydroxyphosphinic (L 4 -L 6 ) acids immobilized onto the electrochemically roughened silver electrode surface ν, stretching; δ, deformation; ρ b , bending; ρ w , wagging; ρ t , twisting; s, symmetric; as, antisymmetric; ip, in-plane; and oop, out-of-plane vibrations; sh, shoulder; X, the C, N, or O atom. a Assignment made on the basis of Refs [15][16][17][18][24][25][26][27][28][29][30][31][32][33][34][35][36].…”