Modifications in structure and optical property of Cu nanoparticles in SiO2 by post heavy ion irradiation

作者：Liu Changlong^*; Wang Nana; Wang Jun; Liu Huixian; Jia Guangyi; Mu Xiaoyu

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2014, 326: 28-32.

DOI：10.1016/j.nimb.2013.10.045

• Ion beam technology
• Nanoparticles
• Distribution control
• Optical properties

The implantation-synthesized Cu nanoparticles (NPs) in silica were irradiated with 500 key Xe and Ar ions, respectively. After Xe ion irradiation at a fluence of 2 x 10(16)/cm(2), the average diameter of Cu NPs was increased from 7.3 to 8.5 nm, and especially, Cu NPs with a diameter of 11-14 nm were formed beyond the projected range of Cu ions and nearly aligned at the same depth, which presented a higher volume fraction. As a result, the Cu surface plasmon resonance (SPR) absorption peak was enhanced. However, if Xe ion fluence was less than 1 x 10(16)/cm(2), no clear variation of the Cu SPR absorption peak could be found. Further, it was also revealed that Xe ion irradiation caused the Cu SPR absorption peak to more drastically change than Ar ion irradiation at the same ion fluence. The underlying processes for the above findings were discussed and tentatively proposed.

• 出版日期2014-5-1
• 单位天津大学; 北京师范大学