Based on these observations, we conducted various tests to investigate the film's response to different environmental factors, initially focusing on temperature as a potential stimulus. Accordingly, we placed the film in an oven at 100 °C for 10 min and saw no change in conductivity. Additionally, placing water on the film resulted in little to no response, suggesting that the response was due to a chemical in the breath. After testing several organic compounds, we found that triethylamine (TEA) had a significant effect, presumably due to the lone pair of electrons on nitrogen, which is known to interact with graphene and PEDOT in sensing applications. As shown in Figure , when argon bubbled through TEA was blown on the film, the resistance sharply increased. However, the resistance decreased when the flow was removed. The recovery time was on the order of minutes. This was likely due to the nonporous nature of the film, as shown in the SEM image in Figure . It should be noted that other solvents were tested, and responses to compounds such as acetone, heptane, ammonium hydroxide, and pyridine were observed. However, these responses exhibited lower specificity and longer recovery times, as seen in Figure . This response to amine gas suggests the film's applicability in sensing technologies.