Direct Imaging of Soft-Hard Interfaces Enabled by Graphene
Direct Imaging of Soft-Hard Interfaces Enabled by Graphene
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DOI：
10.1021/nl901664k
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发表时间：
2009-09-01
期刊：
影响因子：
10.8
通讯作者：
Radmilovic, Velimir
中科院分区：
文献类型：
--
作者：
Lee, Zonghoon;Jeon, Ki-Joon;Radmilovic, Velimir
利用现代显微镜技术对功能化纳米颗粒表面分子和软硬材料之间的界面进行直接成像是一个巨大的挑战。我们展示了石墨烯，sp(2)键合碳原子的单原子层，可以用作超薄支撑膜，可以在常规和原子分辨率透射电子显微镜中直接成像分子层和界面。对柠檬酸盐稳定金纳米颗粒的盖层和界面进行了原子分辨率成像研究，以证明这种新能力。我们的研究结果揭示了石墨烯作为硬、软纳米材料的原子分辨率透射电子显微镜的理想支撑膜的独特潜力。
Direct imaging of surface molecules and the interfaces between soft and hard materials on functionalized nanoparticles is a great challenge using modern microscopy techniques. We show that graphene, a single atomic layer of sp(2)-bonded carbon atoms, can be employed as an ultrathin support film that enables direct imaging of molecular layers and interfaces in both conventional and atomic-resolution transmission electron microscopy. An atomic-resolution imaging study of the capping layers and interfaces of citrate-stabilized gold nanoparticles is used to demonstrate this novel capability. Our findings reveal the unique potential of graphene as an ideal support film for atomic-resolution transmission electron microscopy of hard and soft nanomaterials.