Formation of Freestanding Two-Dimensional Carbon Nanosheets from Poly(Phenylcarbyne) Through Pulsed Laser Ablation
Freestanding, two-dimensional (2D), amorphous carbon nanosheets (CNSs) were formed from a preceramic polymer, poly(phenylcarbyne), through laser ablation using a pulsed Nd:YAG laser. CNSs of several nanometers in thickness and micrometers in size were obtained. The polymer-to-carbon transition was investigated at different laser fluences and target-to-substrate distances. Three different phases, amorphous carbon, ultrathin amorphous CNSs, and thick carbon films, were obtained as the laser fluence increased. The pulsed-laser-induced formation of the 2D CNSs includes three steps: ablation, carbonization, and landing. This study reveals an existing route of forming freestanding 2D CNSs through pulsed laser ablation.
M. Qian et al., "Formation of Freestanding Two-Dimensional Carbon Nanosheets from Poly(Phenylcarbyne) Through Pulsed Laser Ablation," Carbon, Elsevier, Jan 2011.
The definitive version is available at http://dx.doi.org/10.1016/j.carbon.2011.06.096
Mechanical and Aerospace Engineering
Article - Journal
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