High-quality ZnO nanorod based flexible devices for electronic and biological applications

摘要: Vertically aligned zinc oxide nanorods (ZnO NRs) were synthesized on kapton flexible sheets using a simple and cost-effective three-step process (electrochemical seeding, annealing under ambient conditions, chemical solution growth). Scanning electron microscopy studies reveal that ZnO NRs grown seed-layers, developed by electrochemical deposition at negative potential of 1.5 V over duration 2.5 min annealed 200 °C for 2 h, consist uniform morphology good stoichiometry. Transmission analyses show the as-grown have single crystalline hexagonal structure with preferential growth direction 〈001〉. Highly p–n junction diodes fabricated p-type conductive polymer exhibited excellent diode characteristics even fold state.