500keV质子辐照对氧化石墨烯薄膜材料的影响研究

The 500 keV Proton Irradiation Effect on Graphene Oxide Film Materials

新兴的二维石墨烯材料因其优异的导电、导热性、力学性能等,是目前各领域研究的热点。本工作利用地面模拟设备研究了PET基底上氧化石墨烯薄膜材料的质子辐射效应。分别对500 keV质子辐照前后的氧化石墨烯薄膜材料进行了XPS、Raman以及XRD分析,得到了质子辐照对材料表面化学组成、结构以及辐射缺陷的影响。结果表明,在质子辐照注量达到2×10^15/cm 2时,材料表面发生了明显变化,薄膜颜色由棕黄色变为了黑色,主要是因为材料在质子辐照作用下发生了脱氧行为,使得材料中的含氧基团减少。XPS测试结果表明,随着辐照注量的增加,材料中的碳氧原子比不断增大。Raman测试结果表明,辐照后不仅使得材料中的缺陷增多,而且材料结构也发生了严重的无序化转变。

The extraordinary physical and mechanical properties have raised concern about two dimensional graphene materials which exhibit outstanding characteristics in the aspect of electricity and thermal conductivity,good mechanical strength.This emerging nano carbon material has brought about extensive attention in space engineering.Graphene oxide film(GOF)on the PET substrate was irradiated with 500 keV proton for different total fluence in a ground-based irradiation simulator.The change of chemical composition,structural defects of GOF before and after irradiation with 2×10^15/cm^ 2 was measured using XPS,Raman spectroscopy and XRD,respectively.The results showed that the color of film wax changed from black to brown,which was caused by the decrease of oxygen functional group.The results indicated the more number of defect and the seriously disorder structure were attributed to the displacement of carbon atom under the impact of inject proton.