Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.3584204
Title: A new route to graphene layers by selective laser ablation
Authors: Dhar, S. 
Barman, A.R.
Ni, G.X.
Wang, X. 
Xu, X.F. 
Zheng, Y. 
Tripathy, S.
Ariando 
Rusydi, A. 
Loh, K.P. 
Rubhausen, M.
Neto, A.H.C.
Zyilmaz, B. 
Venkatesan, T. 
Issue Date: 2011
Citation: Dhar, S., Barman, A.R., Ni, G.X., Wang, X., Xu, X.F., Zheng, Y., Tripathy, S., Ariando, Rusydi, A., Loh, K.P., Rubhausen, M., Neto, A.H.C., Zyilmaz, B., Venkatesan, T. (2011). A new route to graphene layers by selective laser ablation. AIP Advances 1 (2) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3584204
Abstract: Selectively creating regions of spatially varying thickness may enable the utilization of the electronic properties of N-layer (N=1 or more) graphene and other similar layered materials (e.g., topological insulators or layered superconductors) for novel devices and functionalities on a single chip. The ablation threshold energy density increases dramatically for decreasing layer numbers of graphene originating from the dimensional crossover of the specific heat. For the 2D regime of graphite (up to N≈7) the dominant flexural mode specific heat (due to its N-1 dependence) gives rise to a strong layer number-dependence on the pulsed laser ablation threshold energy density, while for 3D regime (N>7) the ablation threshold saturates due to dominant acoustic mode specific heat. As a result, several energy density windows exist between the minimum energy densities that are required for ablating single, bi, or more layers of graphene, allowing layer number selectivity. Copyright © 2011 Author(s).
Source Title: AIP Advances
URI: http://scholarbank.nus.edu.sg/handle/10635/81893
ISSN: 21583226
DOI: 10.1063/1.3584204
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