Influence of morphology on electrical and optical properties of graphene/Al-doped ZnO-nanorod composites

Nanotechnology
Ebrahim ChalangarHåkan Pettersson

Abstract

The development of future 3D-printed electronics relies on the access to highly conductive inexpensive materials that are printable at low temperatures (<100 ◦C). The implementation of available materials for these applications are, however, still limited by issues related to cost and printing quality. Here, we report on the simple hydrothermal growth of novel nanocomposites that are well suited for conductive printing applications. The nanocomposites comprise highly Al-doped ZnO nanorods grown on graphene nanoplatelets (GNPs). The ZnO nanorods play the two major roles of (i) preventing GNPs from agglomerating and (ii) promoting electrical conduction paths between the graphene platelets. The effect of two different ZnO-nanorod morphologies with varying Al-doping concentration on the nanocomposite conductivity and the graphene dispersity are investigated. Time-dependent absorption, photoluminescence and photoconductivity measurements show that growth in high pH solutions promotes a better graphene dispersity, higher doping levels and enhanced bonding between the graphene and the ZnO nanorods. Growth in low pH solutions yields samples characterized by a higher conductivity and a reduced number of surface defects. These samples al...Continue Reading

References

Jul 26, 2008·Nature Nanotechnology·Dan LiGordon G Wallace
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Citations

Apr 20, 2021·Nanotechnology·Debadrita PariaAmbarish Ghosh
Apr 22, 2020··Leny Rahmawati NovitaAkhmad Al Ittikhad

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