P1.9 Sensitivity of layer-by-layer deposited GO/PDAC to volatile organic compounds
- 20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019
2019-06-25 - 2019-06-26
- P1: Sensoren
- A. Al-Hamry, T. Zubkova, R. Baumann, O. Kanoun - Technische Universität Chemnitz (Deutschland), L. Paterno - Universidade de Brasilia (Brasilien), A. Errachid - Université de Lyon (Frankreich)
- 584 - 587
Films prepared by layer-by-layer deposition of graphene oxide/Poly(diallyldimethylammonium chloride) (GO/PDAC) have been investigated for detection of volatile organic components (VOC), such as acetone, ethanol, isopropanol and methanol. The films were deposited on top of silver interdigitated electrodes fabricated by inkjet-printing on a polyethylene naphthalate (PEN) substrate. The sensitive films were prepared with different bi-layers of GO/PDAC having different conductivities after thermal annealing converting GO to reduced GO. All fabricated sensor elements show a high selectivity towards Methanol compared to other detected VOCs. The resistance changes measured in existence of 2000 ppm concentration of VOCs relative to the resistance measured in ambient air at room conditions is 50% for methanol, 10% for acetone, 9% for ethanol, and 1% for isopropanol. This confirms the sensitivity of GO/PDAC to VOCs, which enables it to be considered as sensitive material to methanol. By further functionalization, the sensitivity to different VOCs can be adjusted, so that selective multi-sensor systems can be realized.