Sven Barth et al 2009 Nanotechnology 20 115705 doi:10.1088/0957-4484/20/11/115705
The elastic moduli of oriented tin oxide nanowires
Sven Barth1,2,4, Catalin Harnagea1, Sanjay Mathur2,3 and Federico Rosei1,4
Show affiliationsTin oxide nanowires (NWs) exhibit interesting electronic properties, which can be harnessed for applications in nanoelectronic devices and sensors. Oriented single crystalline tin oxide NWs were grown at 45° from a titanium dioxide substrate. Their elastic properties were investigated in a two-point geometry using an atomic force microscope (AFM) coupled with a scanning electron microscope under ultrahigh vacuum conditions. Young's modulus was calculated by bending individual NWs and measuring the force exerted on the AFM tip during force–displacement measurements. For the NWs investigated, having radial dimensions below 45 nm and length up to 1.2 µm, we found an average value of 100 ± 20 GPa, which is below the theoretical predictions calculated for different SnO2 single crystal orientations, yet consistent with the indentation moduli of nanobelts. Finally, we discuss the effects of the nanowire–cantilever configuration on the measured Young's modulus.
- PACS
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62.25.-g Mechanical properties of nanoscale systems
81.40.Jj Elasticity and anelasticity, stress-strain relations
- Subjects
- Dates
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Issue 11 (18 March 2009)
Received 10 November 2008, in final form 21 December 2008
Published 25 February 2009
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The elastic moduli of oriented tin oxide nanowires
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