Topic: colloidal gold

Colloidal gold is a certain-size gold particle synthesized by gold ion reduction and polymerization of chloroauric acid (HAuCl4) under the action of reducing agents such as white phosphorus, ascorbic acid, sodium citrate, tannic acid, and so on. Due to electrostatic action, gold particles repel each other and suspend into a stable colloidal state, forming a negatively charged hydrophobic colloid solution, so it is called colloidal gold. Colloidal gold has high electron density and can conjugated...