By a News Reporter-Staff News Editor at Journal of Technology -- A new study on Thin Solid Films is now available. According to news originating from Kagawa, Japan, by VerticalNews correspondents, research stated, "Zinc oxide (ZnO) nanorods (NRs) were synthesized on glass substrates and Au seed layers by chemical bath deposition from the aqueous solution of ZnCl2 and the mixed aqueous solution of zinc acetate dihydrate (ZnAc) and hexamethylenetetramine (HMT) at a low temperature of similar to 90 degrees C. Vertically aligned NRs were successfully grown on the Au seed layers. For the NRs synthesized from the ZnCl2 solution of 0.17 M, when the growth time increased from 15 to 180 min, the average diameter and length increase from similar to 350 to similar to 1020 nm and from similar to 1000 to similar to 5600 nm, respectively."
Our news journalists obtained a quote from the research from National College, "The increase in average diameter with the concentration of solution was observed on the NRs synthesized from the mixed solution of ZnAc and HMT. The influence of additional HMT was found on the shapes and density of the NRs. Photoluminescence (PL) spectra of the NRs synthesized from the solutions of ZnCl2 exhibited a dominant orange band (OB) emission at similar to 640 nm associated with the excess-oxygen atoms. On the other hand, the NRs synthesized from the mixed solution of ZnAc and HMT exhibited a strong near-band-edge (NBE) emission at similar to 380 nm, suggesting their high crystalline quality. For the NRs synthesized from the mixed solution of ZnAc and HMT, the OB emission is effectively excited at the photon energy corresponding to the A free exciton emission. For the NRs synthesized from the solution of ZnCl2, however, the secondary phase Zn(OH)(2) formed at the surface regions of the NRs contributes to the excitation process for the OB emission."
According to the news editors, the research concluded: "Photoacoustic (PA) measurements revealed that the intra-band-gap absorption band extending from 400 to 660 nm responsible for nonradiative transitions were suppressed in the NRs synthesized from the mixed solutions of ZnAc and HMT in comparison with those from the ZnCl2 solutions."
For more information on this research see: Shape controllability and photoluminescence properties of ZnO nanorods grown by chemical bath deposition. Thin Solid Films, 2013;549():292-298. Thin Solid Films can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland. (Elsevier - www.elsevier.com; Thin Solid Films - www.elsevier.com/wps/product/cws_home/504106)
The news correspondents report that additional information may be obtained from T. Terasako, Kagawa Natl Coll Technol, Mitoya, Kagawa 7691192, Japan. Additional authors for this research include T. Murakami, M. Yagi and S. Shirakata.
Keywords for this news article include: Asia, Japan, Kagawa, Thin Solid Films
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