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Publikācija: A Straightforward and “Green” Solvothermal Synthesis of Al Doped Zinc Oxide Plasmonic Nanocrystals and Piezoresistive Elastomer Nanocomposite

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language A Straightforward and “Green” Solvothermal Synthesis of Al Doped Zinc Oxide Plasmonic Nanocrystals and Piezoresistive Elastomer Nanocomposite
Field of research 2. Engineering and technology
Sub-field of research 2.5 Materials engineering
Authors Andris Šutka
Martin Timusk
Nicola Dobelin
Rainer Pärna
Meeri Visnapuu
Urmas Joost
Tanel Käämbre
Vambola Kisand
Kristjan Saal
Māris Knite
Keywords Al doped ZnO, plasmonic oxides, solvothermal synthesis
Abstract Plasmonic oxide nanocrystals hold great promise in a wide range of applications, for which the availability of scalable and “green” synthesis methods is prerequisite, whereas until recently an excellent response has been demonstrated only for samples prepared through intricate synthesis paths. We report here a simple ethanol solvothermal synthesis route of Al doped ZnO plasmonic nanocrystals (Zn1xAlxO) at doping levels of x up to 0.15. The obtained Al doped ZnO samples consisted of nanoparticles and short nanorods with a diameter of around 10 nm at x ¼ 0.15 doping level while reaching aspect ratio levels of 50 for lower doping levels. Detailed structural studies using powder X-ray diffraction Rietveld refinement, X-ray absorption and photoelectron spectroscopies show that all samples maintain the structure of the phase-pure zincite with the space group P63mc. The resulting powders exhibit strong infrared absorption while remaining largely transparent for visible light, enabling the preparation of transparent colloidal dispersions. Furthermore, as a test of applicability in a practical device, the nanocrystals were used to prepare transparent piezoresistive Zn0.925Al0.075O–polydimethylsiloxane composites. The prepared sensor material exhibits excellent repeatable and reproducible piezoresistive behaviour.
DOI: 10.1039/c5ra11910c
Reference Šutka, A., Timusk, M., Dobelin, N., Pärna, R., Visnapuu, M., Joost, U., Käämbre, T., Kisand, V., Saal, K., Knite, M. A Straightforward and “Green” Solvothermal Synthesis of Al Doped Zinc Oxide Plasmonic Nanocrystals and Piezoresistive Elastomer Nanocomposite. RSC Advances, 2015, Vol.5, pp.63846-63852. e-ISSN 2046-2069. Available from: doi:10.1039/c5ra11910c
Additional information Citation count:
ID 21584