The procedure used for modification of the CNTs was adapted from reports previously published [34]. 0.05g of multiwalled carbon nanotubes (Nanolab, Newton) were first purified by refluxing (as received) in a 3M solution of 1:1 (HNO3:H2SO4) at 80◦C for 5h and washed thoroughly with pure water. The purified CNTs were then activated in a solution of 1% SDS (surfactant) at 1mgmL−1 concentration and sonicated for 30 min. Gold nanoparticles were then deposited onto the activated CNTsbymixingthesolutionwith500Lof1%HAuCl4•H2Ofollowed by 500L of 0.75% NaBH4 drop wise whilst stirring. The CNTs before modification