Electrochemical behavior of gold colloidal alkyl modified silicon surfaces.
Herein, we report on the production of nanoelectrode arrays by attaching colloidal gold on silicon-bound mixed self-assembled monolayers of TFA-protected alkenylthiol (C(11)-S-TFA) and undecylenic acid (acid). Effective modification of the surface, tethering of the nanoparticles, and the direct influence of the deprotected alkenylthiol (C(11)-SH) /acid ratio on the number of adherent particles were demonstrated using X-ray photoelectron spectroscopy, electrochemistry, and atomic force microscopy. Cyclic voltammetry showed that the enhancement of electron transfer to the silicon surface by the presence of nanoparticles is influenced by the number of tethered nanoparticles.
Le Saux
Guillaume
G
School of Chemistry and Centre for Vascular Research, The University of New South Wales, Sydney, New South Wales 2052, Australia.
Ciampi
Simone
S
Gaus
Katharina
K
Gooding
J Justin
JJ
D003102:Colloids; D017097:Electric Impedance; D055664:Electrochemical Techniques; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D053758:Nanoparticles / Q000648:ultrastructure; D056951:Photoelectron Spectroscopy; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties; D014269:Trifluoroacetic Acid / Q000737:chemistry*
D003102:Colloids; D006046:Gold; D014269:Trifluoroacetic Acid; D012825:Silicon