Facile in situ synthesis of hydrophilic RGO-CD-Ag supramolecular hybrid and its enhanced antibacterial properties.
Facile in situ synthesis of hydrophilic RGO-CD-Ag supramolecular hybrid and its enhanced antibacterial properties.
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DOI：
10.1016/j.msec.2014.03.027
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Tie Li;Jianfeng Shen;Na Li;M. Ye
中科院分区：
文献类型：
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作者：
Tie Li;Jianfeng Shen;Na Li;M. Ye
在本研究中，通过简便的原位合成过程成功制备了一种以超分子β-环糊精（CD）作为共轭界面的新型亲水性RGO-CD-Ag杂化物。多项表征的结果证实，原位反应提供了一种直接的方法，通过连接 CD 分子之间的头对头氢键相互作用，将 CD 包裹的银纳米颗粒沉积到 CD 化学功能化的 RGO 片上。此外，还发现CD界面的存在确实影响了RGO-CD-Ag纳米复合材料的结构和性能。静态接触角分析表明，杂化物的表面性质可以从疏水性转变为亲水性，从而大大提高了水分散性。然后，RGO-CD-Ag 的杀菌测试得到证实，并清楚地显示所有样品中对革兰氏阴性菌和革兰氏阳性菌的抗菌活性最强。简而言之，这种方法可以很容易地提供一类新的超分子材料，有望在杀菌领域之外找到应用。
In this study, a novel hydrophilic RGO–CD–Ag hybrid with the supramolecular β-cyclodextrin (CD) as a conjugation interface was fabricated successfully by a facilein situsynthesis process. The results of several characterizations confirmed that thein situreaction provided a straightforward approach to deposit the CD wrapped Ag nanoparticles onto the CD chemical functionalized RGO sheets through the head-to-head H-bond interactions between the linker CD molecules. Moreover, it was also found that the CD interface that existed indeed influences the structure and performances of RGO–CD–Ag nanocomposite. The analysis of the static contact angle revealed that the surface property of the hybrid could be transformed from hydrophobic to hydrophilic feature, which highly improved the aqueous dispersibility. And then, the bactericidal test of RGO–CD–Ag was demonstrated and clearly showed the strongest antibacterial activity against Gram-negative and Gram-positive bacteria among all samples. In short, this method may readily provide a new family of supramolecular based materials expected to find applications beyond the bactericidal field.