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. Author manuscript; available in PMC: 2012 Apr 8.
Published in final edited form as: Anal Chim Acta. 2011 Feb 16;691(1-2):6–17. doi: 10.1016/j.aca.2011.02.025

Figure 5.

Figure 5

SEM images of sensing films; (a) undoped SnO2 film, (b) 0.5 wt% CNT–SnO2 film and (c) 1 wt% CNT–SnO2 film. The yellow circles in (b) and (c) indicate CNT fragments, (d) typical cross-sectional SEM image of CNT–SnO2 film and (e) typical HRTEM image of CNT–SnO2 film [195].