Silicate Modified Electrodes for Chemical Sensing
Polish Academy of Sciences, Institute of Physical Chemistry, Kasprzaka 44/52, Warszawa 01-224, Poland
Although silica sol-gel derived glass is an insulator and does not participate in redox rections, it can be used for modification of the electrode surface  or can be applied as a inert support for bulk modified electrode, most frequently carbon ceramic composite electrode (CCE) . The use of silicate matrix opens numerous possibilities for electrode modification. This is because of relatively simple chemistry of silicates and availability of organically modified precursors of sol-gel process. One can tune the electrode properties as hydrophobicity/hydrophilicity or incorporate redox activity by modification of silicate matrix pore walls by functional groups Also the porosity of this material can be adjusted by selection of the sol-gel process conditions. Finally, the native enzymes or tissue cells can be easily incorporated into silicate matrix without loosing their activity, opening the many possibilities of amperometric biosensor preparation .
Presentation: Tutorial lecture at SMCBS 2003 Workshop, by Marcin Opallo
See On-line Journal of SMCBS 2003 Workshop
Submitted: 2003-09-08 14:59 Revised: 2009-06-08 12:55