Yudyanto, Y., Masruroh, M., Santjojo, D. J. ., Sakti, S. P. . and Wardoyo, A. Y. P. (2025) “Investigation of Acoustic Impedance and Morphology of Vacuum-Thermally Evaporated Polypyrrole Layer and Its Potential for Quartz Crystal Microbalance Sensor ”, Trends in Sciences. Nakhon Si Thammarat, Thailand, 22(3), p. 9264. doi: 10.48048/tis.2025.9264.