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The improved piezoelectric properties of ZnO nanorods with oxygen plasma treatment on the single layer graphene coated polymer substrate (Phys. Status Solidi A 2∕2014)
Author(s) -
Hussain Mushtaque,
Abbasi Mazhar Ali,
Ibupoto Zafar Hussain,
Nur Omer,
Willander Magnus
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201470210
Subject(s) - nanorod , graphene , materials science , piezoelectricity , substrate (aquarium) , nanotechnology , polymer substrate , oxygen , optoelectronics , plasma , layer (electronics) , oxide , composite material , chemistry , metallurgy , organic chemistry , geology , oceanography , physics , quantum mechanics
Since the introduction of graphene, scientists and researchers are trying hard to fabricate devices by exploiting the unique properties of graphene. Therefore in the study by Hussain et al. (pp. 455–459 ) the hybrid of single‐layer graphene on PET substrate and zinc oxide (ZnO) nanorods (NRs) has been utilized for developing efficient piezoelectric nanogenerators with improved performance. The improvement was observed after post‐growth oxygen plasma treatment that might reduce the oxygen vacancies. This in turn will lead to improve the crystalline quality of the ZnO NRs and reduce point defects in the NRs as well. The improvement of the piezoelectric effect was about 57% compared to as‐grown ZnO NRs. This improvement has also been observed when comparing cathodoluminescence (CL) spectra of the different NRs: the CL spectra of both cases indicate that the UV emission of the postgrowth oxygen plasma treated NRs has increased compared to the as‐grown NRs, and the defect‐assisted CL emission was decreased. This together with the improvement of the piezoelectric output of the post‐growth oxygen plasma treated NRs indicate the filling of the oxygen vacancies. These findings imply that oxygen plasma treatment might be used as a scenario to improve the performance of ZnO NRs based piezoelectric nanogenerators.