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Highly charged ion beam-induced size modification of Au nanoparticles

Liu Li-Li Chen Liang Zhu Jian Xu Zhong-Feng Zhao Yong-Tao Wang Yu-Yu Xiao Guo-Qing

Highly charged ion beam-induced size modification of Au nanoparticles

Liu Li-Li, Chen Liang, Zhu Jian, Xu Zhong-Feng, Zhao Yong-Tao, Wang Yu-Yu, Xiao Guo-Qing
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  • Received Date:  25 October 2008
  • Accepted Date:  25 February 2009
  • Published Online:  05 March 2009

Highly charged ion beam-induced size modification of Au nanoparticles

  • 1. (1)西安交通大学应用物理系,非平衡物质结构及量子调控教育部重点实验室,西安 710049; (2)西安交通大学应用物理系,非平衡物质结构及量子调控教育部重点实验室,西安 710049;中国科学院近代物理研究所,兰州 730000; (3)中国科学院近代物理研究所,兰州 730000

Abstract: Size modification of Au nanoparticles (NPs), deposited on the Au-thick film surface, induced by highly charged ions (HCI) 40Ar12+ with fixed low dose (4.3×1011 ions/cm2) but various energyies (ranged from 146.64keV to 290.64keV) at room temperature (293.15K), was investigated by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The selected 40Ar12+ beams were provided by electron cyclotron resonance source (ECRIS) of the National Laboratory of the Heavy Ion Research Facility in Lanzhou (HIRFL). The morphological changes of NPs were interpreted by collisional mixing model, Ostwald ripening (OR) model and inverse Ostwald ripening (IOR) model of spherical NPs on a substrate. Theoretical and experimental studies both prove that there exist the critical energy E*, for low ion energy (EE*), the mean diameter R of NPs increases with the increasing energy of incident ions E, while for higher projectile energy (E>E*), it decreases with increasing energy.

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