We report that gold thermally deposited onto n-layer graphenes interacts differently with these substrates depending on the number layer, indicating the different surface properties of graphenes. This results in thickness-dependent morphologies of gold on n-layer graphenes, which can be used to identify and distinguish graphenes with high throughput and spatial resolution. This technique may play an important role in checking if n-layer graphenes are mixed with different layer numbers of graphene with a smaller size, which cannot be found by Raman spectra. The possible mechanisms for these observations are discussed.
@article{arxiv.1103.4444,
title = {Thickness-Dependent Morphologies of Gold on N-Layer Graphenes},
author = {Haiqing Zhou and Caiyu Qiu and Zheng Liu and Huaichao Yang and Lijun Hu and Ji Liu and Haifang Yang and Changzhi Gu and Lianfeng Sun},
journal= {arXiv preprint arXiv:1103.4444},
year = {2011}
}