Fig. 6From: Nanosensors based on polymer vesicles and planar membranes: a short reviewa Colour change of the Cu4I4–MOF-based MMM exposed to gaseous HCl with different concentrations (< 1 min). b SEM image of the surface of MMM at different magnitudes after exposure to gaseous HCl and the EDS mapping spectra of the area as labelled [35]Back to article page