In this work, we performed an experimental analysis using a two-dimensional semiconducting transition metal dichalcogenide (TMD), specifically tungsten diselenide (WSe2), for gas sensor applications. Our method entailed building a chemically liquid exfoliated WSe2 gas sensing device with gold (Au) electrodes to measure its reaction and sensitivity to environmental gasses such as CO2 and N2. The 2D thin film was created through a solution processing method and electrically coupled in a two-terminal configuration; photonic curing system along with the hot plate annealing process was used on the thin film for rapid annealing, enhancing particle connectivity, stable crystal structure, and increasing overall electrical conductivity. The inkjet printing technology is used to explore the potential of the 2D thin film fabrication process that defines a well-controlled and scalable additive manufacturing process at the nano level that makes it possible to develop next-generation flexible devices. The additive nano-manufacturing process allowed us to establish the film's structure and chemical properties before measuring the electrical characteristics of the films when exposed to CO2 and N2 gases at room temperature. To explore and validate the sensitivity to human interaction with the gas-sensing device, we carried out further experiments with direct exposure to human breath in an open environmental space which shows a promising landmark for developing a next-generation flexible breath-sensing device.
| Identifer | oai:union.ndltd.org:unt.edu/info:ark/67531/metadc2332655 |
| Date | 05 1900 |
| Creators | Zaman, Ashique |
| Contributors | Kaul, Anupama, Mukherjee, Sundeep, Meckes, Brian |
| Publisher | University of North Texas |
| Source Sets | University of North Texas |
| Language | English |
| Detected Language | English |
| Type | Thesis or Dissertation |
| Format | Text |
| Rights | Public, Zaman, Ashique, Copyright, Copyright is held by the author, unless otherwise noted. All rights Reserved. |
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