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arXiv 1503.08113cond-mat.mes-hall
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纳米颗粒诱导石墨烯表面褶皱形成的原子力显微镜研究

Formation of wrinkles on graphene induced by nanoparticles: atomic force microscopy study

Barbara Pacakova, Jana Vejpravova, Anton Repko, Alice Mantlikova, Martin Kalbac

摘要:

单层石墨烯(GN)中的褶皱影响GN的电子和输运性质。通过将GN放置在用纳米颗粒(NP)装饰的基底上,可以达到限定的皱纹网络。为了解释GN电子结构的拓扑学诱导的变化背后的机制,并将其与扭曲相关联,GN形态的正确描述是非常重要的。我们在这里演示了如何确定从原子力显微镜(AFM)图像是否GN是在与基板接触或它是分层的,如何是连接与纳米粒子的密度的层的褶皱,如果有优先取向的皱纹。还讨论了隐藏在GN层下面的NP的检测的相关性。该研究是在Si-SiO2基底顶部的GN的九个样品上进行的,所述GN用标称直径为6和10 nm的金属氧化物NP装饰。NP密度在20至470个NP/um 2的范围内变化。皱纹的投影面积随着NP密度的增加而线性增加,与NP尺寸无关。

英文摘要:

Wrinkles in monolayer graphene (GN) affect the GN electronic and transport properties. Defined network of wrinkles can be reached by placing the GN on the substrate decorated with the nanoparticles (NPs). In order to explain mechanism behind the topographically induced changes of the GN electronic structure and to correlate it with the wrinkling, correct description of the GN morphology is of high demand. We demonstrate here how to determine from the atomic force microscopy (AFM) images whether the GN is in the contact with the substrate or it is delaminated, how is the wrinkling of the layer connected with the density of the NPs and if there is the preferential orientation of wrinkles. Also the relevance of detection of the NPs hidden beneath the GN layer is discussed. The study was done on nine samples of the GN on the top of Si-SiO2 substrate, decorated with the metal-oxide NPs of nominal diameter 6 and 10 nm. NP density varied in a range of 20 up to 470 NPs per um2. The projected area of wrinkles was increasing linearly with the increasing NP density, independently on the NP size.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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