Effect of molarity of TiO2 seeded-template to the growth of ZnO nanostructures

ZnO nanostructures were deposited by solution-immersion method on TiO2 layers by sol-gel spin-coating technique. Seven layers of TiO2 were coated on glass substrates at different molarities, followed by annealing treatment and solution-immersion process in aqueous solution containing 1:1 ratio of 0....

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2015-01, Vol.83 (1)
Main Authors: Asib, N A M, Afaah, A N, Aadila, A, Mahmud, M R, Lim, Y C, Alrokayan, Salman A H, Khan, Haseeb A, Rusop, M, Khusaimi, Z
Format: Article
Language:English
Subjects:
Aqueous solutions
Concentration (composition)
Emission spectroscopy
Glass substrates
Hexamethylenetetramine
Materials science
Nanostructure
Photoluminescence
Sol-gel processes
Spin coating
Submerging
Thin films
Titanium dioxide
Ultraviolet radiation
Zinc
Zinc oxide
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Summary:ZnO nanostructures were deposited by solution-immersion method on TiO2 layers by sol-gel spin-coating technique. Seven layers of TiO2 were coated on glass substrates at different molarities, followed by annealing treatment and solution-immersion process in aqueous solution containing 1:1 ratio of 0.05 M of zinc nitrate hexahydrate (Zn(NO3)2.6H2O) and hexamethylenetetramine (HMTA) (C6H12N4). FESEM images confirmed that ZnO nanostructures grown on TiO2 seeded-template are in needle-like shape with smaller tip can be observed. Photoluminescence (PL) spectroscopy showed that as the molarity of TiO2 seeded- template increase, the intensity of PL emission at UV region decrease. UV emission peak for 0.10 M and 0.25 M are higher compared to UV emission peak film of 0.50 M and 1.00 M, which are too low. Meanwhile, the UV absorption properties of the nanostructured thin film for 0.25 M of TiO2 seeded-template was higher compared to other thin films.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/83/1/012006