Fig. 3: Light-controlled inert/active state-switchable sensor for SO2 and the photochromic properties of the SP/AAO nanochannels.
From: Switchable biomimetic nanochannels for on-demand SO2 detection by light-controlled photochromism
a Schematic diagram of the light-controlled SP/AAO nanochannel sensor for SO2. The red dashed box is the C = C response site in MC form. b Change in optical colour and confocal fluorescence and (c) CA measurements of SP/AAO nanochannels during the light-controlled detection of SO2. d I–V curves of SP/AAO nanochannels treated with SO2 (left panel) before and (middle panel) after UV radiation, as well as (right panel) the rectification ratio changes of SP/AAO nanochannels. Error bars in d denote the standard deviation from three different samples. SP spiropyran, MC merocyanine, MC–SO3H merocyanine and SO2 adducts, UV ultraviolet, Vis visible, CA contact angle.
