Abstract
We compared the adsorption behaviors of 1,4‐benzenedithiol (BDT), biphenyl‐4,4′‐dithiol (BPDT), and p‐terphenyl‐4,4″‐dithiol (TPDT) on gold (Au) surfaces. To check the surface orientations and possibility of multilayer formation, surface‐enhanced Raman scattering was employed for the three aromatic dithiols on gold nanoparticles (AuNPs). The Raman spectra of BDT and BPDT on AuNPs were examined, whereas those of TPDT could be obtained on an Au‐coated nanostructured silicon plate. Unlike BDT, BPDT and TPDT did not exhibit a ν(S–H) band at 2560 cm−1. Because of the additional benzene rings, multilayer formation is improbable for BPDT and TPDT under colloidal conditions.
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