Patent ID: 7527875
Filing Date: 2009-05-05
Classification: B22F,B82Y,G11B,H01F,Y10T

Abstract:
1. A group of metal based nanoparticles, said metal based nanoparticle comprising: a core including a noble metal cluster having a diameter of 3 nm or less; and a metal shell including a metal component, the metal shell being formed to surround said core, and having noble metal atoms randomly distributed therein; wherein said metal shell has a noble metal atom content that ranges from about 4.5 at. % to about 15 at. %, wherein said noble metal is selected from the group consisting of Pt, Rh, Au, Pd, Ru, Ag, Ir, Os, and combinations thereof, and wherein said metal component is selected from the group consisting Fe, Co, and Ni, combinations thereof, a binary alloy thereof, and a ternary alloy thereof.