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(a) Schematic of the sensing sample used in [134]. (b) Response of sensors with and without a PMMA membrane layer to target gas mixtures including CO/N2, CH4/N2, H2/N2, and (H2 + CO + CH4)/N2. Gas concentrations were 1000 ppm. Reprinted with permission from [134]. Copyright 2017 ACS Appl Mater Interfaces.
