Sulphur functionalizion of graphene oxide by radiofrequency plasma,Plasma Processes and Polymers

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Sulphur functionalizion of graphene oxide by radiofrequency plasma
Plasma Processes and Polymers ( IF 2.9 ) Pub Date : 2020-04-29 , DOI: 10.1002/ppap.202000039
Patrizia Di Pietro ₁ , Giuseppe Forte ₂ , Rony Snyders _{3,

4} , Cristina Satriano ₁ , Carla Bittencourt ₃ , Damien Thiry ₃

Affiliation

Tailoring the surface properties of graphene oxide by the grafting of heteroatom‐based functionalities is mandatory for the applicative purpose. In this context, here, we investigate the grafting of sulphur functionalized graphene oxide surface (GO–XSH) via a plasma‐based method. The impact of the treatment on the chemical composition and the morphology of GO–XSH was evaluated combining microscopic (atomic force microscopy) and spectroscopic techniques (X‐ray photoelectron spectroscopy and Fourier transform infrared spectroscopy). Optimized experimental conditions have been identified, considering Ar/H₂S gas mixture, for an efficient grafting of –SH groups on the GO surface. This is explained by the creation of defects by bombarding ions during the treatment, followed by subsequent chemisorption of sulphur‐based radicals produced in the plasma. The whole set of our results demonstrates the attractiveness of our strategy for tuning the surface properties of GO of interest for biological applications.

中文翻译：

射频等离子体对氧化石墨烯的硫功能化

通过应用基于杂原子的官能团来定制氧化石墨烯的表面性质是强制性的。在此背景下，我们通过基于等离子体的方法研究了硫官能化氧化石墨烯表面（GO-XSH）的接枝。结合显微镜（原子力显微镜）和光谱技术（X射线光电子能谱和傅里叶变换红外光谱）评估了处理对GO–XSH的化学成分和形态的影响。考虑到Ar / H ₂，已经确定了最佳实验条件S气体混合物，用于在GO表面上有效接枝–SH基团。可以通过在处理过程中轰击离子，然后化学吸附血浆中产生的基于硫的自由基来造成缺陷，从而解释这种现象。整套结果证明了我们针对生物学应用调节感兴趣的GO的表面特性的策略的吸引力。

更新日期：2020-04-29

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