title: Multilayer hexagonal silicon forming in slit nanopore.
abstract: The solidification of two-dimensional liquid silicon confined to a slit nanopore has been studied using molecular dynamics simulations. The results clearly show that the system undergoes an obvious transition from liquid to multilayer hexagonal film with the decrease of temperature, accompanied by dramatic change in potential energy, atomic volume, coordination number and lateral radial distribution function. During the cooling process, some hexagonal islands randomly appear in the liquid first, then grow up to grain nuclei, and finally connect together to form a complete polycrystalline film. Moreover, it is found that the quenching rate and slit size are of vital importance to the freezing structure of silicon film. The results also indicate that the slit nanopore induces the layering of liquid silicon, which further induces the slit size dependent solidification behavior of silicon film with different electrical properties.
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, People's Republic of China.|Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, People's Republic of China.
authors.forename: Yezeng
authors.initials: Y
authors.lastname: He
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, People's Republic of China.
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Sui
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, People's Republic of China.
authors.forename: Jiqiu
authors.initials: J
authors.lastname: Qi
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, People's Republic of China.
authors.forename: Yanqing
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, People's Republic of China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Chen
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, People's Republic of China.
authors.forename: Jichen
authors.initials: J
authors.lastname: Dong
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, People's Republic of China.
authors.forename: Xiongying
authors.initials: X
authors.lastname: Li