A suspension of gold nanoparticles was deposited onto a Formvar (3.05 mm) carbon support TEM copper grid and allowed to settle (5 minutes). Excess nanoparticle suspension was drawn away using filter paper (Whatman, grade 1:11 µm). The particles were image using a FEI Tecnai 12 Biotwin TEM (100 kV). All measurements were conducted in triplicate.