“Effect of Anodization Voltage on NO2 Gas Sensing Performance of TiO2 and Ag-TiO2 Nanotube Arrays”. Experimental and Theoretical NANOTECHNOLOGY 10, no. 4 (October 15, 2026): 1991–2002. Accessed October 2, 2026. https://etnano.com/index.php/journal/article/view/331.