ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Flake-shaped hematite (α-Fe2O3) nanostructure has been successfully fabricated by using ahot-plate to directly heat Fe foil or Fe-coated substrates in air at 300oC. After heating, the surface ofthe samples was found to be populated with α-Fe2O3 nanoflakes. Such growth of α-Fe2O3 nanoflakeswas very substrate-friendly. They can be formed on blank Si wafer, patterened Si, AFM tips, silicasphere, quartz, glass slide, Al foil and electrochemically etched W tip. The formation process and thefinal products were investigated by glancing angle x-ray diffraction (GAXRD), micro-Raman,scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The resultsindicate the final products are single crystalline α-Fe2O3 nanoflakes vertically standing on the Fe3O4film that acts as the precursor for growth of α-Fe2O3. The α-Fe2O3 nanoflakes formed by this methodshow 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 andgas senor devices. Furthermore, it is believed that this simple and substrates-friendly method is usefulin extending the applications of α-Fe2O3 nanostructures
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.45.pdf
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