In the current study, we report new flexible, free standing and high performance electrodes for electrochemical supercapacitors developed througha scalable but simple and efficient approach. Highly porous structures based on carbon fiber and poly (vinyl alcohol) (PVA) were used as a pattern. The electrochemical performances of Carbon fiber/GO-MnO2/CNT supercapacitors were characteriz...

Microbial manganese oxidation was demonstrated at high Mn concentrations (5 g/liter) in bacterial cultures in the presence of a microalga. The structure of the oxide produced varied depending on the bacterial strain and mode of culture. A nonaxenic, acid-tolerant microalga, a Chlamydomonas sp., was found to mediate formation of manganite (gamma-MnOOH). Bacteria isolated from associations with c...

Direct experimental estimations of the low-energy (1.5∼10 meV) complex dielectric constants spectrum and its temperature variation have been investigated for La 0.7 Ca 0.3 MnO 3 thin films using terahertz time-domain spec-troscopy. At low temperatures, a clear Drude-term emerges. With increasing temperature, the scattering rate increases, while the plasma frequency decreases, derived both from ...

We report on Ferromagnetic-Resonance experiments in a single crystal of La 0.8 Sr 0.2 MnO 3 in the temperature range from 4 to 300 K. The observed anisotropy of the resonance line changes on crossing the transition from the orthorhombic O-phase to the rhombohedral R-phase at T ≈ 100 K and indicates a reorientation of the spins at about 130 K.

Manganese oxides (MnO 2 ) with nanowire morphology materials are a promising candidate for improving oxygen evolution and reduction reaction (OER/ORR) performance. In this work, we developed transition metal cation doping strategy into the ?-MnO tunnel structure to tune Mn oxidation states control uniform morphology, crystalline in order investigate effect of over bifunctional activity. The sin...

The design and exploration of heterogeneous materials for energy storage system are investigated here. The charge transport property of the electrode materials is tuned through different architectures and chemical compositions. This dissertation describes the motivation, design, and fabrication of heterogeneous materials grown on cellulose fibers or as free standing ordered nanoarrays with AAO ...

Tetrazolium-dye-linked alcohol dehydrogenase (TD-ADH) of Amycolatopsis methanolica could be resolved into three protein components, which have been purified. Each of the components has the ability to reconstitute TD-ADH activity when combined with the other two. Component 1 is identical to the previously characterized methanol:N,N'-dimethyl-4-nitrosoaniline oxidoreductase (MNO), a decameric pro...

La(0.7)Sr(0.3)MnO(3)-SrRuO(3) superlattices with and without nanometrically thin SrTiO(3), BaTiO(3) and Ba(0.7)Sr(0.3)TiO(3) interlayers were grown by pulsed laser deposition. Transmission electron microscopy studies showed coherent growth of La(0.7)Sr(0.3)MnO(3), SrRuO(3) and SrTiO(3) layers with atomically sharp interfaces, even if individual layers were as thin as one or two unit cells. In c...

The preparation of organic/inorganic layered hybrids has relied on multistep processing. Thus, shortening the synthetic procedure is important for possible future applications, but only a few studies report one-pot syntheses. In this work, we established a simple one-pot solution process to synthesize layered alkyl ammonium/MnO(2) hybrids, by stirring MnCl(2) and alkyl amine/H(2)O(2) aqueous so...