NIMTE OpenIR  > 2018专题
New Deformation-Induced Nanostructure in Silicon
Wang, Bo; Zhang, Zhenyu; Chang, Keke; Cui, Junfeng; Rosenkranz, Andreas; Yu, Jinhong; Lin, Cheng-Te; Chen, Guoxin; Zang, Ketao; Luo, Jun; Jiang, Nan; Guo, Dongming
Source PublicationNANO LETTERS
AbstractNanostructures in silicon (Si) induced by phase transformations have been investigated during the past 50 years. Performances of nanostructures are improved compared to that of bulk counterparts. Nevertheless, the confinement and loading conditions are insufficient to machine and fabricate high-performance devices. As a consequence, nanostructures fabricated by nanoscale deformation at loading speeds of m/s have not been demonstrated yet. In this study, grinding or scratching at a speed of 40.2 m/s was performed on a custom-made setup by an especially designed diamond tip (calculated stress under the diamond tip in the order of 5.11 GPa). This leads to a novel approach for the fabrication of nanostructures by nanoscale deformation at loading speeds of m/s. A new deformation-induced nanostructure was observed by transmission electron microscopy (TEM), consisting of an amorphous phase, a new tetragonal phase, slip bands, twinning superlattices, and a single crystal. The formation mechanism of the new phase was elucidated by ab initio simulations at shear stress of about 2.16 GPa. This approach opens a new route for the fabrication of nanostructures by nanoscale deformation at speeds of m/s. Our findings provide new insights for potential applications in transistors, integrated circuits, diodes, solar cells, and energy storage systems.
KeywordPhase-transition Induced Amorphization Si Nanowires Dynamics Crystal Stress Nanoindentation Transformation Anisotropy Density
Subject AreaScience & Technology - Other Topics ; Materials Science ; Optics ; Physics
Document Type期刊论文
Recommended Citation
GB/T 7714
Wang, Bo,Zhang, Zhenyu,Chang, Keke,et al. New Deformation-Induced Nanostructure in Silicon[J]. NANO LETTERS,2018,18(7):4611-4617.
APA Wang, Bo.,Zhang, Zhenyu.,Chang, Keke.,Cui, Junfeng.,Rosenkranz, Andreas.,...&Guo, Dongming.(2018).New Deformation-Induced Nanostructure in Silicon.NANO LETTERS,18(7),4611-4617.
MLA Wang, Bo,et al."New Deformation-Induced Nanostructure in Silicon".NANO LETTERS 18.7(2018):4611-4617.
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