Nucleation of Solid-State Phase Transformations: Poster Session
Sponsored by: TMS Phase Transformations Committee
Program Organizers: Eric Lass, University of Tennessee-Knoxville; Sophie Primig, University of New South Wales; Keith Knipling, Naval Research Laboratory
Tuesday 11:00 AM
October 19, 2021
Room: Exhibit Hall B
Location: Greater Columbus Convention Center
P1-28: Structure Influenced Rapid Hydrogenation Using Metal-acid Contacts on Crystallographically Oriented VO2 Thin Films: Komal Mulchandani1; Ankit Soni2; Krushna Mavani3; 1Indian Institute of Technology Indore, Rajeev Gandhi Govt. P. G. College, Mandsaur (M.P.); 2Indian Institute of Technology Delhi; 3Indian Institute of Technology Indore
We report on the structure influenced hydrogenation via metal-acid contact method using novel detachable electrode-like design of metal on the edges of VO2 thin films. As temperature increases, VO2 shows the insulator to metal transition accompanied by a structural phase transition from monoclinic to rutile phase. The said method for hydrogenation is tested at different temperatures. A rapid diffusion rate of hydrogen is indicated by a drastically reduced room temperature resistance of the films hydrogenated at elevated temperatures. Moreover, when cooled down to room temperature, these films incline to partially retain a stable rutile phase. The process of hydrogenation becomes much faster and more effective when VO2 acquires the rutile phase i.e. at elevated temperature.