In situ μ-printed optical fiber-tip CO2 sensor using a photocrosslinkable poly(ionic liquid)

•A photocrosslinkable poly(ionic liquid), i.e. poly(1-allyl-3-vinylimidazolium bromide) (PAVB), with a large number of imidazolium functional groups has been synthesized for reversible adsorption of CO2 gas.•An in situ optical μ-printing technology has been established to directly print microscale p...

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