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Merck
  • Enhanced antibacterial activity through the controlled alignment of graphene oxide nanosheets.

Enhanced antibacterial activity through the controlled alignment of graphene oxide nanosheets.

Proceedings of the National Academy of Sciences of the United States of America (2017-10-29)
Xinglin Lu, Xunda Feng, Jay R Werber, Chiheng Chu, Ines Zucker, Jae-Hong Kim, Chinedum O Osuji, Menachem Elimelech
摘要

The cytotoxicity of 2D graphene-based nanomaterials (GBNs) is highly important for engineered applications and environmental health. However, the isotropic orientation of GBNs, most notably graphene oxide (GO), in previous experimental studies obscured the interpretation of cytotoxic contributions of nanosheet edges. Here, we investigate the orientation-dependent interaction of GBNs with bacteria using GO composite films. To produce the films, GO nanosheets are aligned in a magnetic field, immobilized by cross-linking of the surrounding matrix, and exposed on the surface through oxidative etching. Characterization by small-angle X-ray scattering and atomic force microscopy confirms that GO nanosheets align progressively well with increasing magnetic field strength and that the alignment is effectively preserved by cross-linking. When contacted with the model bacterium

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乙二醇二甲基丙烯酸酯, 98%, contains 90-110 ppm monomethyl ether hydroquinone as inhibitor