Mussel-inspired functionalization of graphene for synthesizing Ag-polydopamine-graphene nanosheets as antibacterial materials
Mussel-inspired functionalization of graphene for synthesizing Ag-polydopamine-graphene nanosheets as antibacterial materials
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DOI：
10.1039/c2nr32092d
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发表时间：
2013-01-01
期刊：
影响因子：
6.7
通讯作者：
Tang, Jilin
中科院分区：
文献类型：
--
作者：
Zhang, Zhe;Zhang, Jing;Tang, Jilin
贻贝已被证明能通过其黏附蛋白附着在几乎所有类型的无机和有机表面上。贻贝分泌的黏附蛋白含有高浓度的儿茶酚和胺官能团，这些官能团与聚多巴胺（PDA）具有相似的官能团。受贻贝的启发，一种温和且环保的方法被用于在功能化的聚多巴胺 - 石墨烯纳米片（PDA - GNS）上合成均匀且高度分散的银纳米粒子（Ag NPs）。首先，通过在室温下聚合多巴胺（DA），在氧化石墨烯（GO）上涂覆一层均匀的PDA。在此过程中，DA将GO还原。石墨烯纳米片（GNS）表面的PDA层可作为纳米级导向，在PDA - GNS表面形成均匀的Ag NPs。通过原子力显微镜、透射电子显微镜、紫外 - 可见光谱、拉曼光谱、X射线光电子能谱、X射线衍射和热重分析对所获得的Ag - PDA - GNS杂化材料进行了表征。由于石墨烯纳米片（GNS）和银纳米粒子（Ag NPs）的协同作用，所得的Ag - PDA - GNS杂化材料对革兰氏阴性菌和革兰氏阳性菌均表现出较强的抗菌性能。
Mussels have been shown to attach to virtually all types of inorganic and organic surfaces via their adhesive proteins. The adhesive proteins secreted by mussels contain high concentrations of catechol and amine functional groups, which have similar functional groups with polydopamine (PDA). Inspired by mussels, a mild and environmentally friendly method was used to synthesize Ag nanoparticles (Ag NPs) on functionalized PDA-graphene nanosheets (PDA-GNS) with uniform and high dispersion. First, a uniform layer of PDA was coated on graphene oxide (GO) by polymerizing dopamine (DA) at room temperature. During the process GO was reduced by the DA. The PDA layer on the surface of GNS can be used as a nanoscale guide to form uniform Ag NPs on the surface of PDA-GNS. The obtained Ag-PDA-GNS hybrid materials are characterized by atomic force microscopy, transmission electron microscopy, UV-vis spectroscopy, Raman spectroscopy, X-ray photo-electron spectroscopy, X-ray diffraction, and thermal gravimetric analysis. The resultant Ag-PDA-GNS hybrid materials exhibited strong antibacterial properties to both Gram-negative and Gram-positive bacteria due to the synergistic effect of GNS and Ag NPs.