However, conventional VOC sensors typically use costly semiconductor-manufactured interdigitated metallic electrode platforms, requiring critical raw materials and increasing their environmental footprint . Further, the sensitizing material typically requires high-temperature processing steps to produce the correct phase of the metal oxide (MOX) materials and/or to calcinate previously synthesized MOX nanoparticles . Beyond that, they also often require elevated operating temperatures (>300 o C), which pose significant challenges for low-power, wearable sensors. Therefore, there are three routes to reduce the lifetime energy cost of chemiresistive sensors: 1) the elimination of semiconductor fabricated electrodes, 2) lower energy preparation routes for sensitizing materials, and 3) room temperature operation.