Photocontrolled Reversible Dimensional Changes of Microstructured Photochromic Polymers

Fragouli, Despina; Cingolani, R.; Athanassiou, Athanassia

doi:10.5772/25033

Advances in Unconventional Lithography 2011

DOI: 10.5772/25033

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Photocontrolled Reversible Dimensional Changes of Microstructured Photochromic Polymers

Despina Fragouli¹,

R. Cingolani²,

Athanassia Athanassiou³

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2023

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“…1b). SP is a typical photochromic molecule, and its photoisomerization behaviour has been well demonstrated [23][24][25][26][27][35][36][37] . Upon UV irradiation, it can isomerize to merocyanine (MC), leading to distinct changes in structure and reactivity 12,23 attack (Fig.…”

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Switchable biomimetic nanochannels for on-demand SO2 detection by light-controlled photochromism

et al. 2023

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In contrast to the conventional passive reaction to analytes, here, we create a proof-of-concept nanochannel system capable of on-demand recognition of the target to achieve an unbiased response. Inspired by light-activatable biological channelrhodopsin-2, photochromic spiropyran/anodic aluminium oxide nanochannel sensors are constructed to realize a light-controlled inert/active-switchable response to SO2 by ionic transport behaviour. We find that light can finely regulate the reactivity of the nanochannels for the on-demand detection of SO2. Pristine spiropyran/anodic aluminium oxide nanochannels are not reactive to SO2. After ultraviolet irradiation of the nanochannels, spiropyran isomerizes to merocyanine with a carbon‒carbon double bond nucleophilic site, which can react with SO2 to generate a new hydrophilic adduct. Benefiting from increasing asymmetric wettability, the proposed device exhibits a robust photoactivated detection performance in SO2 detection in the range from 10 nM to 1 mM achieved by monitoring the rectified current.

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Switchable biomimetic nanochannels for on-demand SO2 detection by light-controlled photochromism

et al. 2023

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Photocontrolled Reversible Dimensional Changes of Microstructured Photochromic Polymers

Cited by 1 publication

References 24 publications

Switchable biomimetic nanochannels for on-demand SO2 detection by light-controlled photochromism

Switchable biomimetic nanochannels for on-demand SO2 detection by light-controlled photochromism

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