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Article: Freestanding ZnO nanorod/graphene/ZnO nanorod epitaxial double heterostructure for improved piezoelectric nanogenerators

TitleFreestanding ZnO nanorod/graphene/ZnO nanorod epitaxial double heterostructure for improved piezoelectric nanogenerators
Authors
KeywordsZnO nanorods
Preheating hydrothermal
Nanogenerator
Graphene
Double-sided heterostructures
Issue Date2015
Citation
Nano Energy, 2015, v. 12, p. 268-277 How to Cite?
Abstract© 2015 Elsevier Ltd. It has been intensively studied that vertically aligned ZnO nanorods over the last decade due to their remarkable piezoelectric properties and a potential for various applications. Here, we present a simple strategy for fabricating the freestanding ZnO nanorods/graphene/ZnO nanorods double sided heterostructures. The characterization of the double sided heterostructures by using SEM, and Raman scattering spectroscopy reveals the key process and working mechanism of a formation of the heterostructure. The mechanism is discussed in detail in term of the decomposed seed layer and the vacancy defect of graphene. The approach consists of a facile one-step fabrication process and could achieve ZnO coverage with a higher number density than that of the epitaxial single heterostructure. The resulting improvement in the number density of nanorods has a direct beneficial effect on the double side heterostructured nanogenerator performance. The total output voltage and current density are improved up to~2 times compared to those of a single heterostructure due to the coupling of the piezoelectric effects from both upward and downward grown nanorods. The facile one-step fabrication process suggests that double sided heterostructures would improve the performance of electrical and optoelectrical device, such as touch pad, pressure sensor, biosensor and dye-sensitized solar cells.
Persistent Identifierhttp://hdl.handle.net/10722/273709
ISSN
2023 Impact Factor: 16.8
2023 SCImago Journal Rankings: 4.685
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorShin, Dong Myeong-
dc.contributor.authorTsege, Ermias Libnedengel-
dc.contributor.authorKang, Seok Hee-
dc.contributor.authorSeung, Wanchul-
dc.contributor.authorKim, Sang Woo-
dc.contributor.authorKim, Hyung Kook-
dc.contributor.authorHong, Suck Won-
dc.contributor.authorHwang, Yoon Hwae-
dc.date.accessioned2019-08-12T09:56:26Z-
dc.date.available2019-08-12T09:56:26Z-
dc.date.issued2015-
dc.identifier.citationNano Energy, 2015, v. 12, p. 268-277-
dc.identifier.issn2211-2855-
dc.identifier.urihttp://hdl.handle.net/10722/273709-
dc.description.abstract© 2015 Elsevier Ltd. It has been intensively studied that vertically aligned ZnO nanorods over the last decade due to their remarkable piezoelectric properties and a potential for various applications. Here, we present a simple strategy for fabricating the freestanding ZnO nanorods/graphene/ZnO nanorods double sided heterostructures. The characterization of the double sided heterostructures by using SEM, and Raman scattering spectroscopy reveals the key process and working mechanism of a formation of the heterostructure. The mechanism is discussed in detail in term of the decomposed seed layer and the vacancy defect of graphene. The approach consists of a facile one-step fabrication process and could achieve ZnO coverage with a higher number density than that of the epitaxial single heterostructure. The resulting improvement in the number density of nanorods has a direct beneficial effect on the double side heterostructured nanogenerator performance. The total output voltage and current density are improved up to~2 times compared to those of a single heterostructure due to the coupling of the piezoelectric effects from both upward and downward grown nanorods. The facile one-step fabrication process suggests that double sided heterostructures would improve the performance of electrical and optoelectrical device, such as touch pad, pressure sensor, biosensor and dye-sensitized solar cells.-
dc.languageeng-
dc.relation.ispartofNano Energy-
dc.subjectZnO nanorods-
dc.subjectPreheating hydrothermal-
dc.subjectNanogenerator-
dc.subjectGraphene-
dc.subjectDouble-sided heterostructures-
dc.titleFreestanding ZnO nanorod/graphene/ZnO nanorod epitaxial double heterostructure for improved piezoelectric nanogenerators-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.nanoen.2014.12.040-
dc.identifier.scopuseid_2-s2.0-84921421197-
dc.identifier.volume12-
dc.identifier.spage268-
dc.identifier.epage277-
dc.identifier.isiWOS:000354767500031-
dc.identifier.issnl2211-2855-

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