Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
Nano Lett. 2010 Mar 10;10(3):777-81. doi: 10.1021/nl9026605.
We observe that gold atoms deposited by physical vapor deposition onto few-layer graphenes condense upon annealing to form nanoparticles with an average diameter that is determined by the graphene film thickness. The data are well described by a theoretical model in which the electrostatic interactions arising from charge transfer between the graphene and the gold particle limit the size of the growing nanoparticles. The model predicts a nanoparticle size distribution characterized by a mean diameter D that follows a D proportional, variant m(1/3) scaling law where m is the number of carbon layers in the few-layer graphene film.
我们观察到，通过物理气相沉积沉积在少层石墨烯上的金原子在退火时凝结形成纳米粒子，其平均直径由石墨烯膜的厚度决定。这些数据很好地符合一个理论模型，该模型中石墨烯和金颗粒之间的电荷转移引起的静电相互作用限制了生长的纳米颗粒的尺寸。该模型预测纳米颗粒的尺寸分布的特征在于平均直径 D 遵循 D 与 m(1/3)的比例变化的标度律，其中 m 是少层石墨烯膜中的碳原子层数。
