Chin. Phys. Lett.  2008, Vol. 25 Issue (4): 1403-1406    DOI:
Original Articles |
Effect of (2×1) Surface Reconstruction on Elasticity of a Silicon Nano-Plate
WANG Jing;HUANG Qing-An;YU Hong
Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096
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WANG Jing, HUANG Qing-An, YU Hong 2008 Chin. Phys. Lett. 25 1403-1406
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Abstract A semi-continuum approach is developed to describe the effect of (2×1) surface reconstruction on the elastic modulus of the silicon nano-plate. Young's moduli of a (001) silicon nano-plate along the high-symmetry [100] direction are obtained with and without considering (2×1) surface
reconstruction. The approach predicts that the nano-plate with unreconstructed (001) surface is elastically softer than the bulk while it exhibits the opposite behaviour with (2×1) reconstructed surface. On the (001) surface, the (2×1) reconstructed surface dominates the plate as the thickness of the plate scaling decreases to several tens of nanometre. Whether the nano-plate is softer or stiffer depends on bond loss, bond saturation and direction of bond alignment, which have major impacts on the
mechanics of the nano-plate.
Keywords: 71.55.Cn      61.46.-w      62.20.Dc     
Received: 31 August 2007      Published: 31 March 2008
PACS:  71.55.Cn (Elemental semiconductors)  
  61.46.-w (Structure of nanoscale materials)  
  62.20.Dc  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2008/V25/I4/01403
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WANG Jing
HUANG Qing-An
YU Hong
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