Building 3D Layer-by-Layer Graphene鈥揋old Nanoparticle Hybrid Architecture with Tunable Interlayer Distance

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• 作者：Chenming Xue ; Min Gao ; Yuhua Xue ; Lin Zhu ; Liming Dai ; Augustine Urbas ; Quan Li
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：July 17, 2014
• 年：2014
• 卷：118
• 期：28
• 页码：15332-15338
• 全文大小：457K
• ISSN：1932-7455

文摘

The ability to construct self-assembled three-dimensional (3D) superstructures with desired functionality is not only of scientific curiosity but also crucial in the bottom-up nanofabrication of smart materials and devices. Here a facile solution-processable strategy for creating 3D layer-by-layer graphene鈥揼old nanoparticle architectures was developed in which cysteine molecules with amino groups were chemically grafted onto the surface of graphene oxide and then the cysteine thiol groups were attached to the surface of gold nanorods (GNRs) through strong covalent Au鈥揝 linkages. In this self-assembled structure, as revealed by transmission electron microscopy (TEM) and scanning electron microscope (SEM), it was confirmed that the graphene layers aligned in parallel fashion rather than randomly to each other by the lying down patterns of the GNRs, which also formed layers in parallel. Furthermore, spherical gold nanoparticles with different sizes were used to control the interlayer distance of the 3D hybrid structure.