By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Science and Technology have been published. According to news reporting from Raleigh, North Carolina, by VerticalNews journalists, research stated, "We report on the synthesis of tuned energy band gap Mg(x)Zn(1-x)O nanofibers (NFs) with different Mg(2+) content via the sol-gel electrospinning (ES) technique wherein the addition of the doping material affects not only the morphologies of as-spun ZnAc/PVA and MgAc/ZnAc/PVA nanofibers but also the crystal microstructure and optical properties of calcined ZnO and Mg(x)Zn(1-x)O nanofibers. Following an appropriate aqueous solution preparation of magnesium acetate (MgAc) and zinc acetate (ZnAc) with poly(vinyl alcohol) (PVA), electrospinning is performed and then as-spun nanofibers are calcined in an air atmosphere at 600 °C for 3 h."
The news correspondents obtained a quote from the research from North Carolina State University, "As-spun and calcined nanofiber diameters and morphologies are evaluated with scanning (SEM) and transmission (TEM) electron microscopies, whereas crystalline microstructural interpretations of ZnO and Mg(x)Zn(1-x)O are conducted with wide-angle X-ray diffraction spectra (XRD). Surface chemical composition and elemental evaluation of calcined nanofibers are examined with X-ray photoelectron spectroscopy (XPS), and optical properties and crystal defect analyses of the calcined nanofibers are conducted with photoluminescence spectra (PL). We observe a sharp reduction in fiber diameter upon calcination as a result of the removal of organic species from the fibers and conversion of ceramic precursors into ceramic nanofibers, and the appearance of a range of fiber morphologies from 'bead in a string' to 'sesame seed' coverage depending on fiber composition. Because Zn(2+) and Mg(2+) have similar ionicity and atomic radii, some Zn(2+) atoms are replaced by Mg(2+) atoms in the crystals, leading to a change in the properties of crystal lattices."
According to the news reporters, the research concluded: "The band gap energy of the calcined fibers increases significantly with addition of Mg(2+) along with an increase in the ultraviolet (UV) photoluminescence emission of the fibers."
For more information on this research see: Synthesis of mixed ceramic Mg(x)Zn(1-x)O nanofibers via Mg2+ doping using sol-gel electrospinning. Langmuir, 2013;29(12):4159-66. (American Chemical Society - www.acs.org; Langmuir - www.pubs.acs.org/journal/langd5)
Our news journalists report that additional information may be obtained by contacting Y. Aykut, Dept. of Textile Engineering, Chemistry and Science, North Carolina State University, Raleigh, North Carolina 27695-8301, United States. Additional authors for this research include G.N. Parsons, B. Pourdeyhimi and S.A Khan.
Keywords for this news article include: Raleigh, United States, North Carolina, Science and Technology, North and Central America.
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC