Optical and dielectric properties of fluorinated ethylene propylene and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) copolymer films modified by low energy N4+ and C4+ ion beams

被引：26

作者：

Siljegovic, M. ^{[1
]}

Kacarevic-Popovic, Z. M. ^{[1
]}

Bibic, N. ^{[1
]}

Jovanovic, Z. M. ^{[1
]}

Maletic, S. ^{[2
]}

Stchakovsky, M. ^{[3
]}

Krkljes, A. N. ^{[1
]}

机构：

[1] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade 11001, Serbia

[2] Univ Belgrade, Fac Phys, Belgrade 11000, Serbia

[3] Horiba Jobin Yvon SAS, ZA Vigne Loups, F-91380 Chilly Mazarin, France

来源：

RADIATION PHYSICS AND CHEMISTRY | 2011年 / 80卷 / 12期

关键词：

Ion bombardment; FEP; PFA; Ellipsometry; Optical energy gap; RADIATION-CHEMISTRY; BOMBARDMENT; POLYMERS; CR-39; ESR;

D O I：

10.1016/j.radphyschem.2011.08.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fluorinated ethylene propylene (FEP) and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) (PFA) copolymer films were irradiated in vacuum with 60 key C4+ and N4+ ions to fluences ranging from 1.0 x 10(12) to 5.0 x 10(15) cm(-2). Changes in optical and dielectric properties were analyzed by spectroscopic ellipsometry and ultraviolet-visible (UV-vis), Raman and dielectric relaxation spectroscopies. Direct and indirect energy band gap values were determined from the absorption edge in the 200-800 nm region using Tauc's relation. The values of the direct energy gap have been found to be greater than the corresponding values of the indirect energy gap. Significant changes in the index of refraction, and 13 and gamma dielectric relaxations were observed in the case of N4+ irradiated FEP and PFA samples. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1378 / 1385

页数：8

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