Electroreflectance spectroscopy of gold single crystals: Influence of the solvent
Review articleOpen access
Abstract:

AbstractElectroreflectance spectra of (100), (111) and (110) planes of gold at normal incidence in propylene carbonate solution are strongly influenced by the atomic arrangement of the electrodes, contrary to the interfacial capacity behaviour. In comparison with the aqueous medium, the optical features are noticeably attenuated but remain pronounced. The charge dependence of the transition energy can be attributed to the Stark effect of surface states but with a slight shift towards higher values. The influence of the presence of propylene carbonate is different for the three planes and the strength of the interaction between the gold atoms and solvent molecules can be classified in the order (100) ⪢ (111) ⪢ (110). The ER spectra of single crystals of gold in propylene carbonate medium can be interpreted in terms of optical transitions involving surface states, taking into account the metal—solvent interaction.

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