Au/SnO₂ Thin-film NO₂ Gas Sensors: Fabrication and Characterization - Anh Quan, Tran Nguyen; Van Toan, Nguyen; Van Duy, Nguyen; Ngoc Cong, Tran; Thi Bac, Nguyen; Duc Chien, Nguyen (VNU Journal of Science: Mathematics - Physics, 2026)