Ferry Chrismiadi Nalle, Akhmad Sabarudin, Tyas N. Zafirah, Setyawan Purnomo Sakti
Monitoring volatile organic compounds (VOCs) ensures environmental safety and health. This study improved the detection capabilities of a QCM sensor by incorporating a PMMA-rGO nanocomposite designed to sense alcohol-series VOCs. The nanocomposite was synthesized through modified in-situ polymerization using ethanol–water as a cosolvent, with varying rGO content. Enhanced rGO integration into the PMMA matrix significantly improved sensor performance, achieving the highest response for isopropanol at 15, 30, and 45 ppm. Sensitivity increased linearly with rGO content. All sensors showed consistent repeatability across various alcohol concentrations at room temperature. These results highlight the potential of PMMA-rGO QCM sensors for environmental and industrial VOC monitoring. © 2025 Elsevier B.V.
Department of Chemistry, Brawijaya University, Malang, 65145, Indonesia; Department of Physics, Brawijaya University, Malang, 65145, Indonesia; Sensor Technology Laboratory (SenTLab), Department of Physics, Brawijaya University, Malang, 65145, Indonesia
