Abstract
Thiol-functionalised silica films were deposited on various electrode surfaces (gold, platinum, glassy carbon) by spin-coating sol-gel mixtures in the presence of a surfactant template. Film formation occurred by evaporation induced self-assembly (EISA) involving the hydrolysis and (co)condensation of silane and organosilane precursors on the electrode surface. The characterization of such material was performed by IR spectroscopy, thermogravimetry (TG), elemental analysis (EA), atomic force microscopy (AFM), scanning electron microscopy (SEM) and cyclic voltammetry (CV).
Highlights
Organofunctionalised mesoporous silica materials are of great interest because they combine a high surface area and a narrow pore size distribution with the advantage of owing organic ligand properties
One-pot synthesis of functionalised thin layers requires the Evaporation-Induced-Self-Assembly (EISA) process, which was reported to be suited for the preparation of nicely ordered hybrid mesoporous thin films[6], even in electrode surfaces[7], in which a large variety of organic moieties can be incorporated[8]
The surface of the electrodes modified with thiol-functionalised silica film (TFSF) was characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM) and cyclic voltammetry (CV)
Summary
Organofunctionalised mesoporous silica materials are of great interest because they combine a high surface area and a narrow pore size distribution with the advantage of owing organic ligand properties. This expands the range of potential applications in catalysis, sensors, separation and opto-electric devices[1,2,3,4,5]. The polymeric silica sols were deposited by spincoating approach on freshly polished gold, platinum and glassy carbon surfaces The characterization of such material was performed by IR spectroscopy, thermogravimetry (TG) and elemental analysis (EA) to evaluate the organofunctionalisation of the sol-gel film. The surface of the electrodes modified with thiol-functionalised silica film (TFSF) was characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM) and cyclic voltammetry (CV)
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