Synthesis of Iron Oxide Nanostructures by Annealing Electrodeposited Fe-Based Films

Baoyu Zong,*† Yihong Wu,‡ Guchang Han,† Bingjun Yang,† Ping Luo,† Li Wang,† Jinjun Qiu,† and Kebin Li†
Data Storage Institute, DSI Building, 5 Engineering Drive 1, Singapore 117608, Republic of Singapore, and Department of Electrical and Computer Engineering, National University of Singapore, Singapore 119260, Republic of Singapore
Chem. Mater., 2005, 17 (6), pp 1515–1520
DOI: 10.1021/cm0484697
Publication Date (Web): February 18, 2005
Copyright © 2005 American Chemical Society
*

 Corresponding author. Tel.:  65-6874 8411. Fax:  65-6777 1349. E-mail:  zong_baoyu@dsi.a-star.edu.sg.

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†

 Data Storage Institute.

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‡

 National University of Singapore.

Abstract

Abstract Image

We report the self-assembly of microsized nanowalls and nano-/micropatterns of magnetic iron oxides upon the oxidation of electrodeposited Fe-based films when annealed in air at temperatures ranging from 300 to 450 °C. Scanning electron microscope studies indicate that these nanowalls have the thinnest wall of down to 8 nm with a length up to 2 μm and a height reaching 6 μm; the square patterns have an area of 0.06−1.0 μm2. The generated nanowalls can be used to detect O2 or H2 at high temperatures via their resistance change. The simple spontaneous synthesizing procedure reported here can be applied as well to other electro-/electroless-deposited metal films to form zero-, one-, and two-dimensional metal-based nanostructures.

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History

  • Published In Issue March 22, 2005
  • Received September 7, 2004
    Revised Manuscript Received December 30, 2004

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