Bactericidal activity of black silicon.
Bactericidal activity of black silicon.
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DOI：
10.1038/ncomms3838
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发表时间：
2013
影响因子：
16.6
通讯作者：
Crawford, Russell J.
中科院分区：
文献类型：
--
作者：
Ivanova, Elena P.;Hasan, Jafar;Webb, Hayden K.;Gervinskas, Gediminas;Juodkazis, Saulius;Vi Khanh Truong;Wu, Alex H. F.;Lamb, Robert N.;Baulin, Vladimir A.;Watson, Gregory S.;Watson, Jolanta A.;Mainwaring, David E.;Crawford, Russell J.
黑硅是一种合成纳米材料，其表面含有高纵横比的纳米突起，通过简单的反应离子蚀刻技术生产，用于光伏应用。具有高纵横比纳米特征的表面在自然界中也很常见，例如，双点双板甲的翅膀。在这里，我们表明，黑硅和D。双点翼通过形成相邻纳米突起的簇而形成分级结构。这些结构产生机械杀菌作用，与化学成分无关。这两种表面对所有测试的革兰氏阴性和革兰氏阳性细菌以及内生孢子都具有高度杀菌性，估计平均杀灭率高达约450，000个细胞min−1 cm−2。这代表了首次报道的黑硅或任何亲水表面的物理杀菌活性。这种仿生类似物代表了开发新一代机械响应性抗菌纳米材料的良好前景。 昆虫翅膀的形貌特征导致了一些有趣的表面性质，包括疏水性和抗菌活性。在这里，作者将黑硅的表面识别为仿鸟翼，并表明它也具有抗菌活性。
Black silicon is a synthetic nanomaterial that contains high aspect ratio nanoprotrusions on its surface, produced through a simple reactive-ion etching technique for use in photovoltaic applications. Surfaces with high aspect-ratio nanofeatures are also common in the natural world, for example, the wings of the dragonfly Diplacodes bipunctata. Here we show that the nanoprotrusions on the surfaces of both black silicon and D. bipunctata wings form hierarchical structures through the formation of clusters of adjacent nanoprotrusions. These structures generate a mechanical bactericidal effect, independent of chemical composition. Both surfaces are highly bactericidal against all tested Gram-negative and Gram-positive bacteria, and endospores, and exhibit estimated average killing rates of up to ~450,000 cells min−1 cm−2. This represents the first reported physical bactericidal activity of black silicon or indeed for any hydrophilic surface. This biomimetic analogue represents an excellent prospect for the development of a new generation of mechano-responsive, antibacterial nanomaterials. The topographical features of insect wings result in some interesting surface properties, including hydrophobicity and antibacterial activity. Here the authors identify the surface of black silicon as a mimic of dragonfly wings and show that it too possesses antibacterial activity.
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影响因子：
5
作者：
Hasan, Jafar;Webb, Hayden K.;Ivanova, Elena P.
通讯作者：
Ivanova, Elena P.
影响因子：
5.8
作者：
Nguyen, Song Ha T.;Webb, Hayden K.;Ivanova, Elena P.
通讯作者：
Ivanova, Elena P.
DOI：
10.1007/s00339-005-3337-7
发表时间：
2005-12-01
影响因子：
2.7
作者：
Kondo, T;Juodkazis, S;Misawa, H
通讯作者：
Misawa, H
影响因子：
38.3
作者：
Oh, Jihun;Yuan, Hao-Chih;Branz, Howard M.
通讯作者：
Branz, Howard M.
影响因子：
3.4
作者：
Pogodin, Sergey;Hasan, Jafar;Ivanova, Elena P.
通讯作者：
Ivanova, Elena P.