One-Step Deposition of Nano-Sized Gold onto the Carbon Surface of Encapsulated Silver Nanoparticles

In the present work, we demonstrate the modification of silver nanoparticles encapsulated in the shells of amorphous carbon by nanoparticles of noble metals using galvanic replacement reactions. We show that the treatment of these types of carbon encapsulated silver nanoparticles with HAuCl4 solution is accompanied by the deposition of the gold nanoparticles on the outer surface of the carbon capsules. This process opens extremely broad possibilities for the design and direct preparation of composite carbon-based nanomaterials of different compositions for a wide variety of practical applications.