Abstract
A new class of sol–gel-derived electrochemical biosensors is introducted and demonstrated for glucose sensing. The electrode material comprises an interconnected dispersion of gold nanocrystals imbedded in a porous methyl silicate matrix. The gold nanoparticles provide electrocatalysis and electric conductivity; the methyl groups endow hydrophobicity and limit the active area of the exposed gold, thus decreasing the background current; the silicate provides a transparent and porous backbone; and the encapsulated glucose oxidase provides biocatalysis.
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