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(a) A low-magnification SEM image showing the representative morphology of nanowires on the substrate and the TEM image of a single nanowire inserted at the right corner. (b) An EDS spectrum of a single nanowire. The inset is elemental mapping crossing the nanowire.
XRD pattern confirming the synthesized nanowires coincident with the crystal structure of : (a) standard diffraction data of given by JCPDS file No. 28-1486 and (b) experimental XRD pattern of the synthesized nanowires.
High resolution TEM image of individual nanowire showing grain boundary and out-of-phase boundary. The corresponding diffraction pattern is inserted at the right top corner depicting the relative orientation of grains.
(a) Response and recovery characteristics of nanowires exposed to ethanol with various concentrations at 300 °C: (1) 1 ppm, (2) 10 ppm, (3) 50 ppm, (4) 100 ppm, (5) 500 ppm. (b) Diagram simply showing the sensing process of nanowires exposed to ethanol.
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