70nm Carboxyl (carboxyl-PEG5000-SH) Gold Nanoparticles Water Soluble Iron Oxide Nanoparticles Surface functionality: Maleimide (~1 Maleimide

Surface functionality: Maleimide (~1 Maleimide group/nm2) (10kDa PEG-spacer between gold surface and Maleimide-group)

18E-12 * All concentrations as indicated at an optical density of 0

(M-1cm-1) Size Dispersity (+/-nm) Particle Volume (nm3) Surface Area (nm2) Surface/Volume Ratio Particle Mass (g) Molar Mass (g/mol) Molar Concentration* 60 585 1

100nm NHS-Activated Gold NanoUrchins (lyophilized) - 1 vial

10nm Maleimide-Activated Gold Nanoparticles (lyophilized) - 10 vials

70nm Carboxyl (carboxyl-PEG5000-SH) Gold Nanoparticles Water Soluble Iron Oxide Nanoparticles Surface functionality: Maleimide (~1 MaleimideComposition: Carboxyl gold nanoparticles Core Size: 70nm Absorption max: 548nm Optical Density (OD): 50 Particles per ml: 6. 00E+11 Carboxyl Surface Density: ~1 nm2 Formulation: Supplied in USP grade purified water Properties Cytodiagnostics PEGylated Gold Nanoparticles with carboxyl functional groups are made using a unique proprietary protocol resulting in particles with superior size distribution and shape compared to the leading competitor and are