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Tunable negative permittivity behavior and conductor-insulator transition in dual composites prepared by selective reduction reaction

Journal Article


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Abstract


  • We use a selective reduction reaction to fabricate a new kind of dual composite, which has a "composite-within-a-composite" structure. Based on the different reduction behavior of Fe2O3, an Fe-rich structure (Fe-Fe3O4-Al2O3) is formed in an Al-rich structure (FeAl2O4-Al2O3). The Fe-rich structure can bring down the concentration of free electrons to reduce the energy loss, without losing its metallic behaviour at the same time. Near the percolation threshold, a conductor-insulator transition appears and the dual composites show totally different electromagnetic responses, which can be well explained by effective medium theory. By controlling the parameters of the selective reduction process, we can get a tunable negative permittivity, which implies the ability to continuously change their electromagnetic properties.

UOW Authors


  •   Zhang, Zi-Dong (external author)
  •   Fan, Run-Hua (external author)
  •   Shi, Zhi-Cheng (external author)
  •   Pan, Shi-Bing (external author)
  •   Yan, Ke-Lan (external author)
  •   Sun, Kang (external author)
  •   Zhang, Jing (external author)
  •   Liu, Xiang-Fa (external author)
  •   Wang, Xiaolin
  •   Dou, Shi

Publication Date


  • 2013

Citation


  • Zhang, Z., Fan, R., Shi, Z., Pan, S., Yan, K., Sun, K., Zhang, J., Liu, X., Wang, X. & Dou, S. Xue. (2013). Tunable negative permittivity behavior and conductor-insulator transition in dual composites prepared by selective reduction reaction. Journal of Materials Chemistry C, 1 (1), 79-85.

Scopus Eid


  • 2-s2.0-84879929429

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1593&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/593

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 79

End Page


  • 85

Volume


  • 1

Issue


  • 1

Place Of Publication


  • United Kingdom

Abstract


  • We use a selective reduction reaction to fabricate a new kind of dual composite, which has a "composite-within-a-composite" structure. Based on the different reduction behavior of Fe2O3, an Fe-rich structure (Fe-Fe3O4-Al2O3) is formed in an Al-rich structure (FeAl2O4-Al2O3). The Fe-rich structure can bring down the concentration of free electrons to reduce the energy loss, without losing its metallic behaviour at the same time. Near the percolation threshold, a conductor-insulator transition appears and the dual composites show totally different electromagnetic responses, which can be well explained by effective medium theory. By controlling the parameters of the selective reduction process, we can get a tunable negative permittivity, which implies the ability to continuously change their electromagnetic properties.

UOW Authors


  •   Zhang, Zi-Dong (external author)
  •   Fan, Run-Hua (external author)
  •   Shi, Zhi-Cheng (external author)
  •   Pan, Shi-Bing (external author)
  •   Yan, Ke-Lan (external author)
  •   Sun, Kang (external author)
  •   Zhang, Jing (external author)
  •   Liu, Xiang-Fa (external author)
  •   Wang, Xiaolin
  •   Dou, Shi

Publication Date


  • 2013

Citation


  • Zhang, Z., Fan, R., Shi, Z., Pan, S., Yan, K., Sun, K., Zhang, J., Liu, X., Wang, X. & Dou, S. Xue. (2013). Tunable negative permittivity behavior and conductor-insulator transition in dual composites prepared by selective reduction reaction. Journal of Materials Chemistry C, 1 (1), 79-85.

Scopus Eid


  • 2-s2.0-84879929429

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1593&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/593

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 79

End Page


  • 85

Volume


  • 1

Issue


  • 1

Place Of Publication


  • United Kingdom