Modification of Gold surface with gold nanoparticles and cyclohexyl dithiocarbamate as a selective sensor for cysteine

The self-assembly of cyclohexylamine dithiocarbamate (c6dtc) on gold (au) and gold nanoparticles (aunps) was studied electrochemically using cyclic voltammetry (cv). cyclic voltammetry was used to study the system fe (cn) 63-/fe(cn)64- at the electrode surface of (c6dtc/au) and (c6dtc/aunps). the application of the resulting chemically modified surface as a selective sensor for cysteine,among other amino acids,was investigated. linear oxidative desorption technique was used to characterize the modified electrode that consists of the self-assembled monolayer of cyclohexylamine dithiocarbamate on gold nanoparticles deposited on au electrode (c6dtc/aunps/au). the results showed an enhancement in the oxidation peak of cysteine on the modified electrode and hence a greater sensitivity. © 2013 ehab alshamaileh et al.