Paper Title:
Formation of α-Fe2O3 Nanoflakes by Heating Fe in Air
  Abstract

Flake-shaped hematite (α-Fe2O3) nanostructure has been successfully fabricated by using a hot-plate to directly heat Fe foil or Fe-coated substrates in air at 300oC. After heating, the surface of the samples was found to be populated with α-Fe2O3 nanoflakes. Such growth of α-Fe2O3 nanoflakes was very substrate-friendly. They can be formed on blank Si wafer, patterened Si, AFM tips, silica sphere, quartz, glass slide, Al foil and electrochemically etched W tip. The formation process and the final products were investigated by glancing angle x-ray diffraction (GAXRD), micro-Raman, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicate the final products are single crystalline α-Fe2O3 nanoflakes vertically standing on the Fe3O4 film that acts as the precursor for growth of α-Fe2O3. The α-Fe2O3 nanoflakes formed by this method show very sharp tip with the tip radii as small as several nanometers and large surface to volume ratio. Such nanoflakes may be potentially useful as novel candidates for future electron field emission and gas senor devices. Furthermore, it is believed that this simple and substrates-friendly method is useful in extending the applications of α-Fe2O3 nanostructures.

  Info
Periodical
Solid State Phenomena (Volumes 121-123)
Edited by
Chunli BAI, Sishen XIE, Xing ZHU
Pages
45-48
DOI
10.4028/www.scientific.net/SSP.121-123.45
Citation
T. Yu, C.H. Sow, X.J. Xu, Y.W. Zhu, C. T. Lim, J.T.L. Thong, "Formation of α-Fe2O3 Nanoflakes by Heating Fe in Air", Solid State Phenomena, Vols. 121-123, pp. 45-48, 2007
Online since
March 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Uoo Chang Chung, Won Sub Chung
Abstract:To investigate the catalytic mechanism for the growth of carbon nanotubes (CNTs), carbon materials was synthesized at 680°C with a gas...
3551
Authors: El-Sayed Ghaith, Toshihiro Kasuga, Masayuki Nogami
Abstract:Amorphous calcium silicate coating on a metallic titanium substrate for hard tissue replacement was prepared by a sol-gel method. Calcium...
235
Authors: Liu Zhi, Yan Song, Li Ping Deng, Xing Hai Liu
Abstract:α-MoO3 microspheres assembled by nanorods were synthesized in room temperature ionic liquids (bmimBF4:...
2008
Authors: Xin Yu Wang, Ying Chao Han, Shi Pu Li
Abstract:In this paper, a simple precursor thermolysis method is applied to prepare calcium phosphate crystals and macroporous ceramic. The phase...
191
Authors: Jian Sheng Xie, Ping Luan, Jin Hua Li
Chapter 9: Composite Materials II
Abstract:Using magnetron sputtering technology, the CuInSi nanocomposite thin films were prepared by multilayer synthesized method. The structure of...
2770