Ta/Organo‐In Nanomaterials for Low‐Power or Room Temperature Triethylamine Response

Abstract The development of chemical sensor technology has been significantly advanced amine‐responsive materials with the characteristics of rapid response, stability, and low‐power consumption. This study synthesize Organo‐In materials, and further explored the composite formation between tantalum (Ta) powder, and the organometallic indium (Organo‐In). The morphology and structure of the resulting material were characterized using SEM, TEM, XRD, HAADF, and XPS. Results demonstrate the Ta/Organo‐In composite's exceptional triethylamine (TEA) selectivity: Showing 92.34 response to 50 ppm TEA at 190 °C with 9s/486 s response/recovery times, outperforming aldehydes/ketones/aromatics. Notably, the Ta/Organo‐In prepared by the method in this study showed a response value of approximately 3.4 toward 50 ppm TEA at room temperature (about 25 °C), and the response values remained stable after 10 consecutive cycles, indicating the material's excellent reliability and potential for low‐power applications in real‐time TEA monitoring devices at room temperature. The selectivity and continuous gas sensing performance of Ta/Organo‐In at room temperature are both acceptable. Furthermore, within the concentration range of 1–500 ppm, the response values of the Ta/Organo‐In material to TEA followed a Logistic curve fitting with an R 2 of 0.99644. Finally, the selective response mechanism of materials to TEA was discussed.