Many volatile organic compounds (VOCs) are released during industrial processes ranging from pharmaceutical manufacturing to automotive applications, as well as in domestic settings. They can originate as by-products of combustion, fuel storage, cooking, or through outgassing from household furnishings . VOCs can also build up in enclosed spaces or areas with poor air exchange, resulting in increased local concentration and associated cumulative exposure risk . Often, these VOCs pose a significant health risk at concentrations below human perception, e.g., methanol 8-hour worker safety threshold (200 ppm) vs. human odor detection (>10,000 ppm) . Thus, reliable VOC sensors are necessary for worker and domestic safety through integration with the Internet of Things, either as worker wearables or as part of sensor networks within a workplace or domestic setting.