Microbes and cells on surface of nanoporous metals

微生物（大肠杆菌和表皮葡萄球菌）培养的纳米多孔金制造的脱合金。为了比较，它们也在没有纳米孔结构的平坦金板上培养。两种微生物在纳米多孔金上的数量比在平板金上的减少更明显。扫描电子显微镜和扫描探针显微镜观察发现，大肠杆菌在纳米多孔Au上的中心有凹痕，表皮葡萄球菌在纳米多孔金上的细胞膜破裂。纳米多孔金的这些抗菌性能可能归因于纳米多孔金对周围有机物的异常影响。

Microbes (Escherichia coli and Staphylococcus epidermidis) were cultured on nanoporous gold fabricated by dealloying. For comparison, they were also cultured on flat gold plate with no nanoporous structure. Numbers of both microbes decreased on nanoporous gold more significantly than those on flat gold plate. Observations with scanning electron microscope and scanning probe microscope revealed that Escherichia coli on nanoporous Au had dimple on its center and that Staphylococcus epidermidis on nanoporous gold had fractured cell membrane. These antibacterial properties of nanoporous gold are presumably attributed to the abnormal effect of nanoporous gold on surrounding organic matters.