Copper(II) and Aluminium(III) Ion Sensors Based on Gold Nanoparticles Modified Screen-Printed Carbon Electrodes.

Disposal Copper (II) and aluminium (III) sensors based on gold nanoparticles-modified screen-printed carbon electrode were fabricated. The copper ion sensor was fabricated by attaching gold nanoparticles onto the surface of screen-printed carbon electrode through seed mediated growth method followed by assembly of L-cysteine. The aluminium ion sensor was fabricated by attaching gold nanoparticles onto the surface of screen-printed electrode through drop-coating method followed by self-assembly of mercaptosuccinic acid. As demonstrated by differential pulse voltammeter, both sensors exhibited high sensitivity towards copper (II) or aluminium (III) ions down to ppb (parts per billion) levels. Electrochemical behavior of gold nanoparticles attached onto the surface of screen-printed carbon was investigated in details in order to obtain optimum performance for both sensors. [ABSTRACT FROM AUTHOR]