scholarly journals Iron Oxide Arrays Prepared from Ferrocene- and Silsesquioxane-Containing Block Copolymers

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Raita Goseki ◽  
Tomoyasu Hirai ◽  
Masa-aki Kakimoto ◽  
Teruaki Hayakawa
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Block Copolymers ◽  
Plasma Treatment ◽  
Iron Oxides ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Living Anionic Polymerization ◽  
Molecular Weights ◽  
Transmission Electron

Arrays of iron oxides as precursors of iron clusters were prepared by oxygen plasma treatment of block copolymer microphase-separated nanostructures in thin films. Block copolymers composed of ferrocene-containing and silsesquioxane-containing polymethacrylate (PMAPOSS-b-PMAHFC) were successfully prepared, with different molecular weights and compositions and narrow molecular weight distributions, by living anionic polymerization. The formed microphase-separated nanostructures in the bulk were characterized by wide- and small-angle X-ray scattering (WAXS and SAXS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Thin films were prepared from a solution of PMAPOSS-b-PMAHFC in tetrahydrofuran by spin coating onto silicon wafers. Fingerprint-type line nanostructures were formed in the PMAPOSS-b-PMAHFCs thin films after solvent annealing with carbon disulfide. Oxygen plasma treatment provided the final line arrays of iron oxides based on the formed nanostructural patterns.

SYNTHESIS AND SURFACE PROPERTIES STUDIES ON BAMBOO CHARCOAL/ZnO NANOCOMPOSITE BY USING LOW-TEMPERATURE PLASMA

2017 ◽  
Vol 24 (03) ◽  
pp. 1750032
Author(s):  
K. VIGNESH ◽  
K. A. VIJAYALAKSHMI ◽  
N. KARTHIKEYAN
Keyword(s):  
Electron Microscopy ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Sol Gel ◽  
Oxygen Plasma Treatment ◽  
Bamboo Charcoal ◽  
X Ray Diffraction ◽  
Temperature Plasma ◽  
Transmission Electron ◽  
Surface Modified

In this work we synthesize bamboo charcoal (BC)/ZnO nanocomposite by sol–gel technique. The synthesized BC/ZnO nanocomposite is surface modified by atmospheric air and oxygen plasma to improve the surface functional properties. The structure and morphology of the resultant nanocomposite are analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDAX) and ultraviolet–visible spectroscopy (UV–vis) and its antibacterial behavior is analyzed by the disc diffusion plate technique. We obtained new bonds in FTIR results on BC/ZnO nanocomposite after oxygen plasma treatment. From SEM results we observed there was a plasma etching process that occurred on the resulting BC/ZnO nanocomposite after plasma treatment. Significantly, the antimicrobial behavior also increased after oxygen plasma treatment.

Effect of Oxygen Plasma Treatment on p-Type Electrical Properties of Amorphous La2NiO4+δ Thin Films

2015 ◽  
Vol 10 (4) ◽  
pp. 475-479 ◽  
Author(s):  
Dang-Hoang Hop ◽  
Young-Woo Heo ◽  
Jeong-Joo Kim ◽  
Soo-Young Park ◽  
Inn-Kyu Kang ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Effect Of Oxygen

Formation of tetragonal or monoclinic ZrO2coatings by oxygen plasma treatment of Zr74.7Cu19.7Nb5.6glassy thin films

2011 ◽  
Vol 29 (5) ◽  
pp. 051303 ◽  
Author(s):  
N. T. Panagiotopoulos ◽  
J. Kovač ◽  
M. Mozetič ◽  
P. Patsalas ◽  
G. A. Evangelakis
Keyword(s):  
Thin Films ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment

Effects of oxygen-plasma treatment in La0.7Ca0.3MnO3−δ thin films

2004 ◽  
Vol 39 (13) ◽  
pp. 2119-2125
Author(s):  
K.W. Joh ◽  
C.H. Lee ◽  
Cheol Eui Lee ◽  
S.J. Noh ◽  
Y.H. Jeong
Keyword(s):  
Thin Films ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment

EFFECTS OF OXYGEN CONTENT ON THE TRANSPORT PROPERTIES OF La0.7Ca0.3MnO3-δ THIN FILMS

2007 ◽  
Vol 14 (05) ◽  
pp. 899-902
Author(s):  
H. C. JIANG ◽  
W. L. ZHANG ◽  
Z. C. CHEN ◽  
W. X. ZHANG ◽  
B. PENG
Keyword(s):  
Thin Films ◽  
Plasma Treatment ◽  
Transport Properties ◽  
Oxygen Content ◽  
Oxygen Plasma ◽  
Rf Magnetron Sputtering ◽  
Oxygen Plasma Treatment ◽  
Oriented Growth ◽  
Temperature Range ◽  
Xrd Patterns

We report the effects of oxygen content on the transport properties of La 0.7 Ca 0.3 MnO 3-δ thin films grown epitaxially on LaAlO 3 (001) substrates by RF magnetron sputtering. The as-deposited thin films were annealed and treated by oxygen plasma to improve the oxygen content. We observe that the La 0.7 Ca 0.3 MnO 3-δ films annealed at 850°C is highly oriented growth on (001) LAO substrate. However, the XRD patterns of the samples annealed at lower than 850°C show no distinct diffraction peaks. This evidence indicates that the samples annealed at lower than 850°C are still amorphous or nanocrystalline. The La 0.7 Ca 0.3 MnO 3-δ films without oxygen plasma do not suffer insulator to metal transition at the temperature range from 213 to 293 K. But, at the same temperature range, for the 650°C, 750°C, and 850°C annealed samples with oxygen plasma treatment show an insulator to metal transition at 239 K, 239 K, and 257 K, respectively. Moreover, compared to without oxygen plasma treatment, the resistivity of the sample with oxygen plasma treatment is dramatically decreased. These results imply that the insulator to metal transition is strongly determined by the ratio of Mn 4+/ Mn 3+ and the oxygen content of the films. The increases of the ratio of Mn 4+/ Mn 3+ and the oxygen content lead to a higher insulator to metal transition temperature.

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