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. 2019 Sep 16;10:4220. doi: 10.1038/s41467-019-12223-4

Fig. 1.

Fig. 1

Images of the handheld methanol detector. a It consists of a microsensor (in Teflon housing) connected to a separation column (Tenax TA particles in Teflon tube). b Close-up of the separation column with particles inside a glass tube for better visibility. c Magnified images of a particle’s surface. d The sensor chip carrier with a mounted microsensor. e, f Top-view images of the sensing films consisting of a fine network of agglomerated and aggregated Pd-doped SnO2 nanoparticles