Metal Oxide Nanostructures as Gas Sensing Devices

61Nanostructured MetalOxides andGas-Sensing Devices

500 nm

(a)

(b)

[111]

–

[111]

20 nm

(c)

2.52 Å

2.32 Å

FIGURE 7.13

(a) SEM and (b) TEM images of CuO nanowires synthesized by heating copper wire, of 0.1 mm

diameter, in air to a temperature of 500°C for 4 h. Each CuO nanowire was a bicrystal as shown

by its electron diffraction pattern and HRTEM characterization. (c) HRTEM image showing

the twin boundary of a nanowire. (From Xia, Y., Yang, P., Sun, Y., Wu, Y., Mayers, B., Gates, B.,

Yin, Y., Kim, F., and Yan, H.: One-dimensional nanostructures: Synthesis, characterization, and

applications. Adv. Mater. 2003. 15. 353–389. Copyright Wiley-VCH Verlag GmbH ...