These initial works on LIG-based sensors have focused on the use of MoS2, however, molybdenum is a critical raw material . This is not in line with the intent of using LIG as a resourceefficient sensing platform. Therefore, alternatives should be sought, one particularly attractive option is tin monoxide (SnO). SnO, like graphene and MoS2 is a 2D layered material, due to the Sn 5s lone pair distorting its crystal structure allowing for enhanced surface/volume ratios and accessible 5s orbitals . This, in addition to its p-type semiconducting nature due to Sn vacancies , and its metastability up to moderate temperatures (370 o C), make it an attractive candidate for room temperature VOC sensing . However, to date there have been limited investigations using SnO, preferring instead SnO2 due to its well-established synthesis route, despite its high-temperature preparation and calcination process steps (400-800 o C) . Further SnO presents a viable route for sensitivity enhancement via p-n junction surface depletion layers through controlled oxidation of SnO (p-type) into SnO2 (n-type).