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Vertically Aligned Mn-doped Fe3O4 Nanowire Arrays: Magnetic Properties and Gas Sensing at Room Temperature

Published online by Cambridge University Press:  26 February 2011

Seon Oh Hwang ,
Chang Hyun Kim ,
Yoon Myung ,
Seong-Hun Park ,
Jeunghee Park ,
Chang Soo Hahn  and
Jae-Young Kim
Seon Oh Hwang
Affiliation:
nanolab@empas.com, Korea University, Department of Materials Chemistry, Jochiwon, 339-700, Korea, Republic of
Chang Hyun Kim
Affiliation:
nanolab@empas.com, Korea University, Department of Materials Chemistry, Jochiwon, 339-700, Korea, Republic of
Yoon Myung
Affiliation:
qoouni@korea.ac.kr, Korea University, Department of Materials Chemistry, Jochiwon, 339-700, Korea, Republic of
Seong-Hun Park
Affiliation:
nanolab@empas.com, Korea University, Department of Materials Chemistry, Jochiwon, 339-700, Korea, Republic of
Jeunghee Park
Affiliation:
parkjh@korea.ac.kr, Korea University, Department of Materials Chemistry, Jochiwon, 339-700, Korea, Republic of
Chang Soo Hahn
Affiliation:
nanolab@empas.com, Korea Institute of Machinery and Materials, Nano-Mechanical Systems Research Center, Daejeon, 305-343, Korea, Republic of
Jae-Young Kim
Affiliation:
nanolab@empas.com, POSTECH, Pohang Accelerator Laboratory, Pohang, 790 - 784, Korea, Republic of
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Abstract

Vertically-aligned Mn (10%)-doped Fe3O4 (Fe2.7Mn0.3O4) nanowire arrays were produced by the reduction/substitution of pre-grown Fe2O3 nanowires. These nanowires were ferromagnetic with a Verwey temperature of 129 K. X-ray magnetic circular dichroism measurements revealed that the Mn2+ ions preferentially occupy the tetrahedral sites, substituting for the Fe3+ ions. We observed that the Mn substitution decreases the magnetization, but increases the electrical conductivity. We developed highly sensitive gas sensors using these nanowire arrays, operating at room temperature, whose sensitivity showed a correlation with their bond strength of diatomic/triatomic molecules. Based on the fact that the sensitivity was highest toward water vapor, an excellent-performance humidity sensor was fabricated.

Keywords

nanostructuresensormagnetic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1032: Symposium I – Nanoscale Magnetic Materials and Applications , 2007 , 1032-I14-40
Copyright
Copyright © Materials Research Society 2008

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References

1. Hu, J., Odom, T. W., Lieber, C. M., Acc. Chem. Res. 1999, 32, 435. (b) M. S. Gudiksen, L. J. Lauhon, J. Wang, D. C. Smith, C. M. Lieber, Nature (London) 2002, 415, 617. (c) X. Duan, Y. Huang, R. Agarwal, C. M. Lieber, Nature (London) 2003, 421, 241.10.1021/ar9700365Google Scholar
2. Wolf, S. A., Awschalom, D. D., Buhrman, R. A., Daughton, J. M., Molnár, S. von, Roukes, M. L., Chtchelkanova, A. Y., Treger, D. M., Science 2001, 294, 1488.Google Scholar
3. Ishikawa, M., Tanaka, H., Kawai, T., Appl. Phys. Lett. 2006, 86, 222504.10.1063/1.1942640Google Scholar
4.a) Tripathy, D., Adeyeye, A. O., Boothroyd, C. B., Piramanayagam, S. N., J. Appl. Phys. 2007, 101, 013904. b) M. -S. Lee, T. –Y. Kim, C. -S. Lee, J. –C. Park, Y. I. Kim, D. Kim, J. Magn. Magn. Mater. 2004, 268, 62.10.1063/1.2404469Google Scholar
5. Kim, C. H., Chun, H. J., Kim, D. S., Kim, S. Y., Park, J., Moon, J. Y., Lee, G., Yoon, J., Jo, Y., –H. Jung, M., Jung, S. I., Lee, C. J., Appl. Phys. Lett. 2006, 89, 223103.10.1063/1.2393165Google Scholar
6.a) Verwey, E. J. W., Heilmann, E. L., J. Chem. Phys. 1947, 15, 174. b) J. M. Hastings, L. M. Corliss, Phys. Rev. 1956, 104, 328. c) S. Suga, S. Imada, J. Electron Spectrosc. Relat. Phemon. 1998, 92, 1. d) V. N. Antonov, B. N. Harmon, A. N. Yaresko, Phys. Rev. B 2003, 67, 024417. e) E. Kravtsov, D. Haskel, A. Cady, A. Yang, C. Vittoria, X. Zuo, V. G. Harris, Phys. Rev. B 2006,74, 104114. f) Z. Szotek, W. M. Temmerman, D. Ködderitzsch, A. Svane, L. Petit, H. Winter, Phys. Rev. B 2006, 74, 174431. g) C. I. Pearce, C. M. B. Henderson, R. A. D. Pattrick, G. van der Laan, D. J. Vaughan, Am. Miner. 2006, 91, 880.10.1063/1.1746464Google Scholar
7. Ishikawa, M., Tanaka, H., Kawai, T., Appl. Phys. Lett. 2006, 86, 222504.10.1063/1.1942640Google Scholar
8. Štichauer, L., Mirone, A., Turchini, S., Prosperi, T., Zennaro, S., Zema, N., Lama, F., Pontin, R., Šimša, Z., Tailhades, Ph., Bonningue, C., J. Appl. Phys. 2001, 90, 2511.10.1063/1.1389519Google Scholar