Platinum nanospheres

Platinum nanospheres, citrate functionalized, 5 nm diameter, 0.05 mg/mL (2 mM aqueous sodium citrate buffer)

Platinum nanospheres, citrate functionalized, 50 nm diameter, 0.05 mg/mL in 2 mM aqueous sodium citrate buffer

Platinum nanospheres, citrate functionalized, 30 nm diameter, 0.05 mg/mL (2 mM aqueous sodium citrate buffer)