Strain-driven synthesis of 〈112〉 direction InAs nanowires in V-grooved trenches on Si using InP/GaAs buffer layers

Highlights

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We reported the 〈112〉 direction growth of InAs nanowires on patterned Si (001).

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We proposed mechanism of 〈112〉 directions InAs nanowires and demonstrated.

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We reported stacking-faults-free ZB InAs nanowires on Si (001).

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InAs nanowires crystal quality was measured by TEM.

Abstract

The catalyst-free metal organic vapor phase epitaxial growth of InAs nanowires on silicon (001) substrates is investigated by using selectively grown InP/GaAs buffer layers in V-grooved trenches. A strain-driven mechanism of self-aligned 〈112〉 direction InAs nanowires growing is proposed and demonstrated by the transmission electron microscopy measurement. The morphology of InAs nanowires is tapered in diameter and exhibits a hexagonal cross-section. The defect-free InAs nanowire shows a pure zinc blende crystal structure and an epitaxial relationship with InP buffer layer.

Keywords

• A1 Growth models; 
• A3 Metal-organic chemical vapor deposition; 
• B1 Nanomaterials; 
• B1 Semiconducting III–V materials
• • • SOURCE:Sciencedirector
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