Chemical modifications of ion irradiated polystyrene probed by optical absorption measurements

	Chemical modifications of ion irradiated polystyrene probed by optical absorption measurements
	Zhu, ZY; Jin, YF; Liu, CL; Sun, YM; Li, CL; Hou, MD; Wang, ZG; Zhang, CH; Chen, XX; Liu, J
	2000-05
关键词	ion irradiation polystyrene chemical modification optical absorption
卷号	166
页码	621-626
英文摘要	Polystyrene (PS) films are irradiated at room temperature with 3 MeV silicon ions and 1.4 GeV argon ions to fluences ranging from 1 x 10(10) to 3 x 10(14) cm(-2). Fourier transform infrared (FTIR) specula reflection spectra and ultraviolet/ visible (UV/Vis) transmission spectra are measured to investigate the radiation-induced chemical modifications. It is found that the intrinsic absorption bands show reduction in intensity with increasing fluence and electronic energy loss, indicating the degradation of the polymeric structure. For Si ion implanted specimens, significant chemical modifications occur above about 3 x 10(13) cm(-2), corresponding to an average energy deposition of about 45 MGy. For Ar ion irradiated specimens, the critical electronic energy loss is around 0.77 keV/nm at the fluence of 5.5 x 10(12) cm(-2), corresponding to an energy deposition of about 6.4 MGy. The increase in absorbance in the UV/Vis range and a shift of the absorption edge toward the visible is attributed to carbonization of the material. The results are discussed on the basis of ion fluence and energy loss. (C) 2000 Elsevier Science B.V. All rights reserved.
会议录	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
会议录出版者	ELSEVIER SCIENCE BV
会议录出版地	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
语种	英语
WOS研究方向	Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
WOS记录号	WOS:000087422200109
内容类型	会议论文
源URL	[http://119.78.100.186/handle/113462/58171]
专题	中国科学院近代物理研究所
通讯作者	Zhu, ZY
作者单位	Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhu, ZY,Jin, YF,Liu, CL,et al. Chemical modifications of ion irradiated polystyrene probed by optical absorption measurements[C]. 见:.