Abstract
The biocompatibility improvement of graphene oxide is crucial for biomedical applications. Herein, we propose to prepare carboxylated graphene oxide (GeneO–COOH) with glutamic acid (Glu) at different pH values. The complexes (GemeO–COOH/Glu) are characterized by FT-IR, XRD, TG, and Zeta potential. The results show that the complexes have close relation with pH value due to the acid-responsive Glu. It is demonstrated that GeneO–COOH complexes with Glu via amidation reaction in the basic domain. The blood compatibility of GeneO–COOH/Glu complexes is evaluated by hemolysis and recalcification test. The results show that the plasma recalcification time is prolonged greatly in the whole blood, and the hemolysis rates are less than 5 %. In a word, GeneO–COOH/Glu complexes are blood compatible at low concentration, which is potential for producing blood-contacting materials.
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Acknowledgements
This work was supported by the ninth batch of “six talents of high level talents peak” Funding Scheme (2012-NY-031), the National Natural Science Foundation of China (21274063), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Base of production, education & research of prospective joint research project of Jiangsu Province (BY2011109), and Natural Science Foundation of the Jiangsu Higher Education Institutions of China (11KJD430003).
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Zhou, NL., Gu, H., Tang, FF. et al. Biocompatibility of novel carboxylated graphene oxide–glutamic acid complexes. J Mater Sci 48, 7097–7103 (2013). https://doi.org/10.1007/s10853-013-7523-2
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DOI: https://doi.org/10.1007/s10853-013-7523-2