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https://hdl.handle.net/10119/10736
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| Title: | Synthesis of delafossite CuAlO_2 p-type semiconductor with a nanoparticle-based Cu(I) acetate-loaded boehmite precursor |
| Authors: | Thu, Tran V.
Thanh, Pham D.
Suekuni, Koichiro
Hai, Nguyen H.
Mott, Derrick
Koyano, Mikio
Maenosono, Shinya |
| Keywords: | electronic materials
oxides
chemical synthesis
X-ray diffraction
crystal structure |
| Issue Date: | 2011-08-05 |
| Publisher: | Elsevier |
| Magazine name: | Materials Research Bulletin |
| Volume: | 46 |
| Number: | 11 |
| Start page: | 1819 |
| End page: | 1827 |
| DOI: | 10.1016/j.materresbull.2011.07.047 |
| Abstract: | Delafossite CuAlO_2 p-type nanostructured semiconductor was synthesized using boehmite (γ-AlOOH) nanorods loaded with copper(I) acetate [Cu(OAc)] as a precursor (nanoprecursor). Because Cu(OAc)-loaded γ-AlOOH nanorods are highly anisotropic, they tend to form inherent bunches consisting of several nanorods during the course of drying the nanoprecursor dispersion droplet on a solid substrate. By annealing the nanoprecursor at 1150 °C in air, a delafossite CuAlO_2 polycrystal was successfully obtained as the dominant phase. The CuAlO_2 polycrystal is found to exhibit the (110) crystal orientation. The crystalline anisotropy of CuAlO_2, which is not usually attainable using conventional molecular precursors, is presumably originated in the anisotropic morphology of the nanoprecursor. The Seebeck coefficient, resistivity and thermal conductivity of the CuAlO_2 polycrystal at 300 K were found to be +560 μV K^<−1>, 1.3 Ω m and 19.4 W K^<−1> m^<−1>, respectively, confirming the p-type nature of the CuAlO_2 polycrystal. |
| Rights: | NOTICE: This is the author's version of a work accepted for publication by Elsevier. Tran V. Thu, Pham D. Thanh, Koichiro Suekuni, Nguyen H. Hai, Derrick Mott, Mikio Koyano, Shinya Maenosono, Materials Research Bulletin, 46(11), 2011, 1819-1827, http://dx.doi.org/10.1016/j.materresbull.2011.07.047 |
| URI: | https://hdl.handle.net/10119/10736 |
| Material Type: | author |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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