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Adhesion of Bacteria to a Graphene Oxide Film
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2020-01-07 , DOI: 10.1021/acsabm.9b01028 Jiang Ming 1 , Duo Sun 1 , Jingping Wei 1 , Xiaolan Chen 1 , Nanfeng Zheng 1
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2020-01-07 , DOI: 10.1021/acsabm.9b01028 Jiang Ming 1 , Duo Sun 1 , Jingping Wei 1 , Xiaolan Chen 1 , Nanfeng Zheng 1
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Graphene oxide (GO)-based materials have recently received increasing attention in antibacterial fields due to their unique two-dimensional structure, high specific surface area, water solubility, easy functionality, low cost, etc. In this work, we investigated the interaction of GO films with several bacteria, including Escherichia coli, Staphylococcus aureus, Bacillus, and Shewanella-MR 1. Surprisingly, it was found that GO films had no influence on the growth of bacteria; bacteria could selectively attach on the GO films, and the adhesion efficiency was dependent on the genus of bacteria and the quality of GO films, as confirmed by quartz crystal microbalance (QCM) measurement. X-ray photoelectron spectroscopy, Ramam spectra analyses, and current–voltage curves further indicated that the bacteria could reduce GO to reductive GO (rGO) or graphite. Through constant current measurements, a possible mechanism that involved electron transfer from bacteria to the GO film was proposed for the adherence of bacteria to GO films and reduction of GO films by bacteria. The study suggested that GO films could act as biocompatible sites for adhesion of bacteria on their surfaces, providing a paradigm for exploring the interaction of GO-related materials with bacteria.
中文翻译：
细菌对氧化石墨烯薄膜的粘附
氧化石墨烯 (GO) 基材料由于其独特的二维结构、高比表面积、水溶性、易功能性、低成本等，近年来在抗菌领域受到越来越多的关注。在这项工作中，我们研究了与含有多种细菌的 GO 薄膜，包括大肠杆菌、金黄色葡萄球菌、芽孢杆菌和Shewanella-MR 1。令人惊讶的是，发现 GO 薄膜对细菌的生长没有影响；通过石英晶体微天平（QCM）测量证实，细菌可以选择性地附着在 GO 薄膜上，粘附效率取决于细菌的种类和 GO 薄膜的质量。X 射线光电子能谱、拉曼光谱分析和电流-电压曲线进一步表明，细菌可以将 GO 还原为还原性 GO (rGO) 或石墨。通过恒定电流测量，提出了一种可能的机制，涉及从细菌到 GO 薄膜的电子转移，以实现细菌对 GO 薄膜的粘附和细菌对 GO 薄膜的还原。该研究表明，GO薄膜可以作为细菌在其表面粘附的生物相容性位点，
更新日期：2020-01-07
中文翻译：
细菌对氧化石墨烯薄膜的粘附
氧化石墨烯 (GO) 基材料由于其独特的二维结构、高比表面积、水溶性、易功能性、低成本等，近年来在抗菌领域受到越来越多的关注。在这项工作中，我们研究了与含有多种细菌的 GO 薄膜，包括大肠杆菌、金黄色葡萄球菌、芽孢杆菌和Shewanella-MR 1。令人惊讶的是，发现 GO 薄膜对细菌的生长没有影响；通过石英晶体微天平（QCM）测量证实，细菌可以选择性地附着在 GO 薄膜上，粘附效率取决于细菌的种类和 GO 薄膜的质量。X 射线光电子能谱、拉曼光谱分析和电流-电压曲线进一步表明，细菌可以将 GO 还原为还原性 GO (rGO) 或石墨。通过恒定电流测量，提出了一种可能的机制，涉及从细菌到 GO 薄膜的电子转移，以实现细菌对 GO 薄膜的粘附和细菌对 GO 薄膜的还原。该研究表明，GO薄膜可以作为细菌在其表面粘附的生物相容性位点，
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