MoO2 hollow fiber with rectangular cross sections

Molybdenum oxide hollow fiber with rectangular cross sections has been discovered. The fibers grow on a Mo substrate heated with an acetylene-oxygen combustion flame from the backside. The edge length of the cross-sectional rectangle ranges from similar to 0.1 to 10 mu m. The material, as determined from the X-ray photoelectron spectroscopy and X-ray diffraction, is of monoclinic MoO2.