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Tuning the Sensitivity of Electrodes Modified with an Organic‐Inorganic Hybrid by Tailoring the Structure of the Nanocomposite Material
Author(s) -
Sayen Stéphanie,
Etienne Mathieu,
Bessière Jacques,
Walcarius Alain
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200211)14:21<1521::aid-elan1521>3.0.co;2-7
Subject(s) - nanocomposite , electrode , mesoporous material , analyte , mass transfer , open circuit voltage , materials science , chemical engineering , hybrid material , chemistry , nanotechnology , catalysis , organic chemistry , chromatography , voltage , engineering , physics , quantum mechanics
Voltammetric analysis subsequent to open‐circuit accumulation was performed with carbon paste electrodes modified with polysiloxane‐immobilized mercaptopropyl groups. By using mercury(II) as a model analyte, it was found that the electrode sensitivity was greatly influenced by the structure of the modifier by means of promoted or restricted mass transfer. Synthetic routes leading to open framework structures containing a large amount of accessible binding sites (i.e., surfactant templated organic‐inorganic mesoporous materials) gave rise to the highest mass transfer kinetics. These results open the door for further development of sensitive and selective sensors.