Atomistic investigation of ablation of amorphous polystyrene under femtosecond laser pulse
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- 作者：YanHua Huang (1)
ChengWei Song (1)
JunJie Zhang (2)
Tao Sun (2)
1. Research Center of Laser Fusion ; China Academy of Engineering Physics ; Mianyang ; 621900 ; China
2. Center for Precision Engineering ; Harbin Institute of Technology ; Harbin ; 150001 ; China - 关键词：polystyrene ; femtosecond laser ablation ; molecular dynamics ; laser intensity ; molecular architecture ; 鑱氳嫰涔欑儻 ; 椋炵婵€鍏夌儳铓€ ; 鍒嗗瓙鍔ㄥ姏瀛?/li> 婵€鍏夊己搴?/li> 鍒嗗瓙缁撴瀯 ; 037002
- 刊名：SCIENCE CHINA Physics, Mechanics & Astronomy
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：58
- 期：3
- 页码：1-7
- 全文大小：1,889 KB
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- 刊物主题：Physics
Chinese Library of Science
Mechanics, Fluids and Thermodynamics
Physics - 出版者：Science China Press, co-published with Springer
- ISSN：1869-1927
文摘
In the present work we elucidate the thermodynamic mechanisms of femtosecond (fs) laser ablation of amorphous polystyrene by means of molecular dynamics (MD) simulations. The effects of extrinsic parameter of laser pulse intensity and intrinsic parameter of molecular architecture on the laser ablation are further studied. Simulation results show that the laser ablation-induced polymeric material removal is achieved by evaporation from the surface and expansion within the bulk. Furthermore, inter-chain sliding and intra-chain change also play important roles in the microscopic deformation of the material. It is found that both the laser pulse intensity and the arrangement of phenyl groups have significant influence on the fs laser ablation of polystyrene.