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Facile nucleation of gold nanoparticles on graphene-based thin films from Au_(144) molecular precursors

机译：Au_（144）分子前体在石墨烯基薄膜上金纳米颗粒的容易成核

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摘要

We demonstrate a facile and cost effective method to obtain gold nanoparticles on graphene by dispersing Au_(144) molecular nanoclusters by spin coating them in thin layers on graphene-based films and subsequent annealing in a controlled atmosphere. The graphene-based thin films used for these experiments are prepared by solvent-assisted exfoliation of graphite in water in the presence of ribonucleic acid as a surfactant and by subsequent vacuum filtration of the resulting graphene-containing suspensions. Not only is this method easily reproducible, but it leads to gold nanoparticles that are not dependent in size on the number of graphene layers beneath them. This is a distinct advantage over other methods. Plasmonic effects have been detected in our gold nanoparticle-decorated graphene layers, indicating that these thin films may be useful in applications such as plasmonic solar cells and optical memory devices.
机译：我们展示了一种通过在石墨烯基薄膜上以薄层旋涂Au_（144）分子纳米团簇并将其分散在石墨烯基薄膜上并随后在可控气氛中进行退火的方法，在石墨烯上获得金纳米颗粒的简便，经济高效的方法。用于这些实验的基于石墨烯的薄膜是通过在作为表面活性剂的核糖核酸的存在下，在水中通过溶剂辅助剥离石墨来制备的，然后对所得的含石墨烯的悬浮液进行真空过滤。该方法不仅易于重现，而且导致金纳米颗粒的大小不依赖于其下方石墨烯层的数量。与其他方法相比，这是一个明显的优势。在我们的纳米金修饰的石墨烯层中检测到了等离子体等离子效应，表明这些薄膜可能在等离子太阳能电池和光学存储设备等应用中有用。

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