Anisotropic deformation of polystyrene particles by MeV Au ion irradiation

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:266

Article

Liu, Yingmin¹  Zhao, Ziqiang¹  Chen, Yan¹  Lan, Ding²  Wang, Yuren² 

[1] Peking Univ, Inst Heavy Ion Phys, Key Lab Heavy Ion Phys, Minist Educ, Beijing 100871, Peoples R China

[2] Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China

关键词: anisotropic deformation;    ion irradiation;    polystyrene;   

DOI  :  10.1016/j.nimb.2008.02.022

来源: Elsevier

【 摘 要 】

MeV An irradiation leads to a shape change of polystyrene (PS) and SiO2 particles from spherical to ellipsoidal, with an aspect ratio that can be precisely controlled by the ion fluence. Sub-micrometer PS and SiO2 particles were deposited on copper substrates and irradiated with Au ions at 230 K, using an ion energy and fluence ranging from 2 to 10 MeV and 1 x 10(14) ions/cm(2) to 1 x 10(15) ions/cm(2). The mechanisms of anisotropic deformation of PS and SiO2 particles are different because of their distinct physical and chemical properties. At the start of irradiation, the volume of PS particles decrease, then the aspect ratio increases with fluence, whereas for SiO2 particles the volume remains constant. (C) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

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