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. 2012 Dec 12;12(12):17023–17045. doi: 10.3390/s121217023

Figure 4.

Figure 4.

SEM images of the WO3 layer prepared by the thermal evaporation method developed at sensor lab, (a) and (b). TEM bright field image of the structure of WO3 agglomerate (c) (reprinted from [18] with permission of Elsevier, copyright 2005).