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Enhancement of interaction of L-929 cells with functionalized graphene via COOH+ ion implantation vs. chemical method

机译:通过COOH +离子注入与化学方法增强L-929细胞与功能化石墨烯的相互作用

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摘要

Low hydrophilicity of graphene is one of the major obstacles for biomaterials application. To create some hydrophilic groups on graphene is addressed this issue. Herein, COOH+ ion implantation modified graphene (COOH+/graphene) and COOH functionalized graphene were designed by physical ion implantation and chemical methods, respectively. The structure and surface properties of COOH+/graphene and COOH functionalized graphene were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and contact angle measurement. Compared with graphene, COOH+/graphene and COOH functionalized graphene revealed improvement of cytocompatibility, including in vitro cell viability and morphology. More importantly, COOH+/graphene exhibited better improvement effects than functionalized graphene. For instance, COOH+/graphene with 1 × 1018 ions/cm2 showed the best cell-viability, proliferation and stretching. This study demonstrated that ion implantation can better improve the cytocompatibility of the graphene.
机译:石墨烯的低亲水性是生物材料应用的主要障碍之一。解决在石墨烯上产生一些亲水基团的问题。在此,分别通过物理离子注入和化学方法设计了COOH + 离子注入改性石墨烯(COOH + /石墨烯)和COOH官能化的石墨烯。通过扫描电子显微镜(SEM),透射电子显微镜(TEM),傅里叶变换红外光谱(FTIR),拉曼光谱,X表征了COOH + /石墨烯和COOH功能化石墨烯的结构和表面性质。射线光电子能谱(XPS)和接触角测量。与石墨烯相比,COOH + /石墨烯和COOH功能化的石墨烯具有改善的细胞相容性,包括体外细胞活力和形态。更重要的是,COOH + /石墨烯表现出比官能化石墨烯更好的改善效果。例如,具有1×up10 18 ions / cm 2 的COOH + /石墨烯显示出最佳的细胞活力,增殖和拉伸。这项研究表明,离子注入可以更好地改善石墨烯的细胞相容性。

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