Two-Dimensional Solution-Processed Tungsten Diselenide’s Response to Nitrogen Gas Flow

Currently, there are limited reports on the use of two-dimensional WSe2WSe2 in gas sensors. In this work, we fabricated a chemically exfoliated WSe2WSe2 device, contacted with gold (Au) electrodes where a response to incoming gas flow, specifically NitrogenNitrogen (N2) is evident. The films were formed using solution processing and electrically contacted in a two-terminal configuration. The structural properties of the films were examined using various microscopy and spectroscopy tools such as Raman spectroscopyRaman spectroscopy and optical microscopy. This allowed us to validate the morphology and chemical fingerprints of the films and correlate this to our electronic transport data with N2 as the incoming gas. This work is a stepping-stone towards further analysis of WSe2WSe2 as a gas sensingGas sensing media for low-power and miniaturized sensors using additive manufacturingAdditive manufacturing (AM) approaches.