Au, Ge, and AuGe nanoparticles fabricated by laser ablation

作者：Musaev Omar R^*; Sutter Eli A; Wrobel Jerzy M; Kruger Michael B

来源：Journal of Nanoparticle Research, 2012, 14(2): 654.

DOI：10.1007/s11051-011-0654-y

• Laser ablation
• Nanoparticles
• AuGe alloy
• Phase explosion
• Electron microscopy

A eutectic AuGe target immersed in distilled water was ablated by pulsed ultraviolet laser light. The structure of the ablated material was investigated by high-resolution transmission electron microscopy (HRTEM). The images show formation of nanowire structures of AuGe up to 100 nm in length, with widths of 5-10 nm. These nanostructures have Ge content significantly lower than the target material. Electron diffraction demonstrates that they crystallize in the alpha-AuGe structure. For comparison, laser ablation of pure Au and pure Ge targets was also performed under the same conditions. HRTEM shows that Ge forms spherical nanoparticles with a characteristic size of similar to 30 nm. Au forms spherical nanoparticles with diameters of similar to 10 nm. Similar to AuGe, it also forms chainlike structures with substantially lower aspect ratio.

• 出版日期2012-2