Size modification of Au nanoparticles induced by slow highly charged ions Ar-40(q ) irradiation

作者：Xu Zhongfeng^*; Liu Lili; Zhao Yongtao; Chen Liang; Zhu Jian; Wang Yuyu; Mao Guoqing

来源：Journal of Non-Crystalline Solids, 2009, 355(28-30): 1439-1443.

DOI：10.1016/j.jnoncrysol.2009.05.044

• Nanoparticles
• Radiation

Size modification of Au nanoparticles (NPs), deposited on the Au-thick film surface and irradiated by slow highly charged ions (SHCI) Ar-40(q ) (3 <= q <= 12) with fixed low dose of 4.3 x 10(11) ions/cm(2) and various energy ranging from 74.64 to 290.64 keV at room temperature (293.15 K), was investigated by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The effect of projectile kinetic energy on the modified size of NPs was explored by an appropriate choice of the fixed process parameters such as ion flux, irradiation temperature, incident angle, irradiation time, etc. The morphological changes of NPs were interpreted by models involving collisional mixing, Ostwald ripening (OR) and inverse Ostwald ripening (IOR) of spherical NPs on a substrate. A critical kinetic energy as well as a critical potential energy of the projectile in the Au NPs size modification process were observed.

• 出版日期2009-8-15
• 单位中国科学院近代物理研究所; 西安交通大学