Abstract
Deposition of alternating layers of phosphomolybdic acid, PMo 12, and generation-4 polyamidoamine dendrimer, PAMAM, on a gold electrode is demonstrated. The gold is first coated with a self-assembled monolayer of 4-aminothiophenol. Based on the charge under cyclic voltammetric peaks, at least 12 layers of PMo 12 are deposited with an estimated quantity of 5.2×10 −11 mol cm −2 in each. The voltammetry of PMo 12 is consistent with that for solution studies, in that three two-electron processes are observed with formal potentials of 0.381, 0.238 and 0.012 V. However, the dependence of peak current on scan rate is indicative of redox surface-confined species. The PAMAM provided a spacer that led to a multilayer assembly with high conductivity and, because of its size, apparently high permeability. Regarding the latter, efficient catalysis of the reduction of nitrite and the oxidation of arsenite is achieved.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
