GC/OligoThiophene/Ag(NP) hybrid interfaces are synthesized and characterized: GC is the glassy carbon surface; OligoThiophene stands for both an ultrathin bithiophene grafted film and a 4-Br-Bithiophene grafted polymer; Ag(NP) stands for silver nanoparticles. The hybrid interface preparation involves different steps: first, the electrode surface is functionalized through a combination of electrochemically assisted grafting (under reduction regime) and polymerization (under oxidation regime); then, silver nanoparticles are chemisorbed by dipping. In particular, an ultrathin film of grafted bithiophene can be obtained by applying one cyclic voltammetry reduction cycle (GC/BT surface), while subsequent cyclic voltammetry cycling under oxidation regime yields an immobilized 4Br-Bithiophene polymer (GC/4BrBT surface). AFM and TEM images were recorded to investigate the morphology and chemical composition of the Ag(NP). FeII/ FeIII cyclic voltammetry, Zn underpotential deposition (UPD), XPS, LA-ICP-MS, and Raman techniques were exploited to characterize both the GC/OligoThiophene and GC/OligoThiophene/Ag(NP) interfaces. Theoretical calculation, at the B3LYP/ 6-311G** level of the theory, enabled rationalization of the electroreduction mechanism and the Raman results.

On the Hybrid Glassy Carbon Electrode/OligoThiophene/Ag(NP) Interface / Francesco Tassinari; Erik Tancini; Massimo Innocenti; Luisa Schenetti; Claudio Fontanesi.. - In: LANGMUIR. - ISSN 0743-7463. - STAMPA. - 28:(2012), pp. 15505-15512. [10.1021/la3025777]

On the Hybrid Glassy Carbon Electrode/OligoThiophene/Ag(NP) Interface.

INNOCENTI, MASSIMO;
2012

Abstract

GC/OligoThiophene/Ag(NP) hybrid interfaces are synthesized and characterized: GC is the glassy carbon surface; OligoThiophene stands for both an ultrathin bithiophene grafted film and a 4-Br-Bithiophene grafted polymer; Ag(NP) stands for silver nanoparticles. The hybrid interface preparation involves different steps: first, the electrode surface is functionalized through a combination of electrochemically assisted grafting (under reduction regime) and polymerization (under oxidation regime); then, silver nanoparticles are chemisorbed by dipping. In particular, an ultrathin film of grafted bithiophene can be obtained by applying one cyclic voltammetry reduction cycle (GC/BT surface), while subsequent cyclic voltammetry cycling under oxidation regime yields an immobilized 4Br-Bithiophene polymer (GC/4BrBT surface). AFM and TEM images were recorded to investigate the morphology and chemical composition of the Ag(NP). FeII/ FeIII cyclic voltammetry, Zn underpotential deposition (UPD), XPS, LA-ICP-MS, and Raman techniques were exploited to characterize both the GC/OligoThiophene and GC/OligoThiophene/Ag(NP) interfaces. Theoretical calculation, at the B3LYP/ 6-311G** level of the theory, enabled rationalization of the electroreduction mechanism and the Raman results.
2012
28
15505
15512
Francesco Tassinari; Erik Tancini; Massimo Innocenti; Luisa Schenetti; Claudio Fontanesi.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/776590
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