3D printing flexible Ga-doped ZnO films for wearable energy harvesting: thermoelectric and piezoelectric nanogenerators. - Lemine, Aicha S.; Bhadra, Jolly; Sadasivuni, Kishor Kumar; Popelka, Anton; Yempally, Swathi; Ahmad, Zubair; Al-Thani, Noora J.; Hasan, Anwarul (Journal of Materials Science: Materials in Electronics, 2024)