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Gold nanoparticles (AuNp) formed using alkoxysilane precursors are utilized
in the development of thin organically modified silicates (ormosil) films.
The resulting films are optically transparent thereby retaining the optical
properties of AuNp. Surface morphology shows that the in
situ generated AuNp retained their nanogeometry in the ormosil
films. An application of the AuNp encapsulated ormosils is shown in
electrocatalytic determination of hydrogen peroxide. For this purpose,
potassium ferricyanide is chosen as electron transfer mediator and is
encapsulated in the films. Results show that the presence of AuNp in the
ormosil matrix dramatically improves the electrochemical behavior of
potassium ferricyanide. The ormosil films are utilized for electrocatalytic
determination of hydrogen peroxide. In order to investigate the
biocompatibility of the ormosil film, horseradish peroxidase (HRP) is
incorporated resulting in improvement in oxidation and reduction of
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