Micropatterning MXene/TiO₂ Nanocomposite Ink for Gas Sensing

This work describes the preparation, characterization, and micropatterning of MXene(Ti 3 C 2 )/TiO 2 nanocomposite inks. MXene nanopowder was oxidized to form MXene/TiO 2 nanocomposite powder using an air-aging method. The MXene/TiO 2 inks were prepared using deionized water (H 2 O) as the solvent/dispersant and polyvinylpyrrolidone (PVP) as the surfactant. Various techniques were utilized to characterize the MXene/TiO 2 nanocomposite material, and the BET results showed the preferential adsorption of butane of the MXene/TiO 2 coating. Utilizing an ultrasonic dispersion printer in conjunction with a stencil mask, the MXene/TiO 2 nanocomposite ink was successfully printed onto a 10mm*10mm gold-plated silicon substrate. This process achieved millimeter-level precision control, enabling the printing of fine lines with a width of 1μm and a spacing of 0.05mm. Furthermore, this technique demonstrated the ability to render various complex patterns, thus exemplifying the potential of MXene/TiO 2 nanocomposite ink in the field of micro- and nano-manufacturing.