Inkjet printed 2D SnS2 nanosheets for ammonia gas sensor

Through ultrasonic exfoliation of bulk single crystal counterpart, 2D SnS2 nanoshees were prepared and dispersed in ethanol without the aid of any additives as a printable ink. Arbitrary patterns were able to be generated on paper and plastic substrates simply using a commercial inkjet printer. The printed line arrays of SnS2 nanosheets on polyimide film, as an example for applications, were further integrated with microelectrodes to function as a sensitive ammonia sensor, with the detection limit down to 5 ppm and fast response of less than 1 min. Our fabrication approach demonstrates great potential for low-cost, rapid and scalable production of 2D nanomaterials-based functional devices.