UV/Vis Spectroelectrochemical Evidence of Rectification of Quantized Charging in Monolayer‐Protected Gold Cluster Films

Quantized optical changes accompanying discrete core charging of hexanethiolate-protected Au-cluster films was evidenced by UV/Vis absorption spectroelectrochemistry. The film absorbance is found to respond proportionally and reversibly to the nanoparticle core charge in aqueous solutions (see Figure), where ion-induced rectification of the quantized charging is also observed. These results represent a step forward in the development of sensory and electro-optic nanodevices based on the singular performance of these films.