Gold nanoparticle modified silicon nanowires as biosensors

A biosensor based on modified silicon nanowires has been fabricated to detect glutathione in solution via the cyclic voltammetry (CV) method. Owing to the strong sorption ability and high electrical conductivity of the modified silicon nanowires, the biosensor shows a fast response with good linear concentration dependence on glutathione in the range 0.33 - 2.97 mu M. This facile modification approach could be extended to fabricate similar biosensors for the detection of other biomolecules.