Wang et al. Nanoscale Research Letters 2012, 7:246 http://www.nanoscalereslett.com/content/7/1/246 Page 5 of 7 Figure 4 The TEM and HRTEM images of ZnO nanorod. (a) The TEM image of ZnO nanorod; (b) The HRTEM image of ZnO nanorod, and the inset image of Figure 4b is the diffraction pattern of ZnO nanorod. Figure 5 Schematics of the apparatus used and the I-V characteristics of the ZnO nanorod arrays. (a) The schematics of the apparatus used in our experiment; (b) I-V characteristics of the ZnO nanorod arrays measured in dark and under UV illumination; and (c) Fitted lnI versus V curve in dark and under UV illumination conditions.