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ACS Appl Mater Interfaces. 2017 May 3;9(17):15031-15037. doi: 10.1021/acsami.7b01330. Epub 2017 Apr 24.

Dimensional-Hybrid Structures of 2D Materials with ZnO Nanostructures via pH-Mediated Hydrothermal Growth for Flexible UV Photodetectors.

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Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.


Complementary combination of heterostructures is a crucial factor for the development of 2D materials-based optoelectronic devices. Herein, an appropriate solution for fabricating complementary dimensional-hybrid nanostructures comprising structurally tailored ZnO nanostructures and 2D materials such as graphene and MoS2 is suggested. Structural features of ZnO nanostructures hydrothermally grown on graphene and MoS2 are deliberately manipulated by adjusting the pH value of the growing solution, which will result in the formation of ZnO nanowires, nanostars, and nanoflowers. The detailed growth mechanism is further explored for the structurally tailored ZnO nanostructures on the 2D materials. Furthermore, a UV photodetector based on the dimensional-hybrid nanostructures is fabricated, which demonstrates their excellent photocurrent and mechanical durability. This can be understood by the existence of oxygen vacancies and oxygen-vacancies-induced band narrowing in the ZnO nanostructures, which is a decisive factor for determining their photoelectrical properties in the hybrid system.


MoS2; ZnO nanostructure; dimensional hybrid; flexible photodetector; graphene; hydrothermal growth


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