title: Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal.
abstract: Well-aligned ZnO nanostructures have been intensively studied over the last decade for remarkable physical properties and enormous applications. Here, we describe a one-step fabrication technique to synthesis freestanding ZnO nanorod/graphene/ZnO nanorod double heterostructure. The preparation of the double heterostructure is performed by using thermal chemical vapor deposition (CVD) and preheating hydrothermal technique. In addition, the morphological properties were characterized by using the scanning electron microscopy (SEM). The utility of freestanding double heterostructure is demonstrated by fabricating the piezoelectric nanogenerator. The electrical output is improved up to 200% compared to that of a single heterostructure owing to the coupling effect of the piezoelectricity between the arrays of ZnO nanorods on the top and bottom of graphene. This unique double heterostructure have a tremendous potential for applications of electrical and optoelectrical devices where the high number density and specific surface area of nanorod are needed, such as pressure sensor, immuno-biosensor and dye-sensitized solar cells.
authors: Department of Nanoenergy Engineering, BK21 Plus Nanoconvergence Technology Division, Pusan National University (PNU), Miryang.
authors: Dong-Myeong
authors: DM
authors: Shin
authors: Department of Cogno-Mechatronics Engineering, Pusan National University (PNU), Busan.
authors: Seok Hee
authors: SH
authors: Kang
authors: SKKU Advanced Institute of Nanotechnology (SAINT), Center for Human Interface Nanotechnology (HINT), SKKU-Samsung Graphene Center, Sungkyunkwan University (SKKU).
authors: Seongsu
authors: S
authors: Kim
authors: SKKU Advanced Institute of Nanotechnology (SAINT), Center for Human Interface Nanotechnology (HINT), SKKU-Samsung Graphene Center, Sungkyunkwan University (SKKU).
authors: Wanchul
authors: W
authors: Seung
authors: Department of Nanoenergy Engineering, BK21 Plus Nanoconvergence Technology Division, Pusan National University (PNU), Miryang.
authors: Ermias Libnedengel
authors: EL
authors: Tsege
authors: SKKU Advanced Institute of Nanotechnology (SAINT), Center for Human Interface Nanotechnology (HINT), SKKU-Samsung Graphene Center, Sungkyunkwan University (SKKU).
authors: Sang-Woo
authors: SW
authors: Kim
authors: Department of Nanoenergy Engineering, BK21 Plus Nanoconvergence Technology Division, Pusan National University (PNU), Miryang.
authors: Hyung Kook
authors: HK
authors: Kim
authors: Department of Cogno-Mechatronics Engineering, Pusan National University (PNU), Busan; swhong@pusan.ac.kr.
authors: Suck Won
authors: SW
authors: Hong
authors: Department of Nanoenergy Engineering, BK21 Plus Nanoconvergence Technology Division, Pusan National University (PNU), Miryang; yhwang@pusan.ac.kr.
authors: Yoon-Hwae
authors: YH
authors: Hwang
mesh_terms: D004560:Electricity; D006108:Graphite / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D006108:Graphite; D015034:Zinc Oxide