Surface Modification and Damage of MeV-Energy Heavy Ion Irradiation on Gold Nanowires

Nanomaterials

Dan Mo¹  Pengfei Zhai¹  Jie Liu¹  Yonghui Chen¹  Shuangbao Lyu¹  Lijun Xu¹  Jinglai Duan¹  Youmei Sun¹  Yaxiong Cheng¹  Khan Maaz¹  Huijun Yao¹ 

[1] Institute of Modern Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, China;

关键词: gold nanowires;    ion irradiation;    surface modification;    stacking fault tetrahedrons;   

DOI  :  10.3390/nano7050108

来源: DOAJ

【 摘 要 】

Gold nanowires with diameters ranging from 20 to 90 nm were fabricated by the electrochemical deposition technique in etched ion track polycarbonate templates and were then irradiated by Xe and Kr ions with the energy in MeV range. The surface modification of nanowires was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations. Different craters with and without protrusion on the gold nanowires were analyzed, and the two corresponding formation mechanisms, i.e., plastic flow and micro-explosion, were investigated. In addition, the sputtered gold nanoparticles caused by ion irradiation were studied and it was confirmed that the surface damage produced in gold nanowires was increased as the diameter of the nanowires decreased. It was also found that heavy ion irradiation can also create stacking fault tetrahedrons (SFTs) in gold nanowires and three different SFTs were confirmed in irradiated nanowires. A statistical analysis of the size distribution of SFTs in gold nanowires proved that the average size distribution of SFT was positively related to the nuclear stopping power of incident ions, i.e., the higher nuclear stopping power of incident ions could generate SFT with a larger average size in gold nanowires.

【 授权许可】

Unknown