Method For Direct Formation Research Articles

Novel polyoxometalate-based composite as efficient electrocatalyst for alkaline water oxidation reaction

The development of new techniques for design and fabrication of efficient and durable electrocatalysts for water splitting into hydrogen and oxygen is a fundamental approach to one of the major challenges to meet future sustainable fuel demand. Herein, a novel polyoxometalate-based composite was formed onto rotating carbon paste electrode by two different immobilization techniques, including physical mixing method and direct formation method, and used as electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. The comparisons of the electrochemical performance of these fabrication methods exhibited a high catalytic activity and stability toward OER for both immobilization techniques and gained a current density of 10 mA cm−2 at overpotential of 380 and 440 mV for direct formation and physical mixing methods, respectively.

Simple Transfer Technology for Fabrication of TFT Backplane for Flexible Displays

A new simple transfer technology for the realization of flexible thin-film transistors (TFTs) on a plastic substrate has been developed. The basic principle of the proposed method is that, after all the fabrication processes for the TFT array on a temporary adhesive layer coated on a glass substrate have been completed, the TFT is then transferred onto a plastic film. A 5.8-in-diagonal wide-quarter quarter video graphics array (QVGA) organic TFT array and a 5-in-diagonal QVGA oxide TFT array were fabricated on the temporary adhesive layer. We confirmed that the degree of substrate deformation for the proposed technology was less than that for the conventional direct formation method. We also transferred both TFT arrays to plastic films and confirmed that no significant degradation in the electrical characteristics of the TFTs has occurred as a result of the transfer process. It is considered that this will be a key technology for the fabrication of large flexible displays with TFT backplanes.

Mössbauer study on valency state of iron ions in [formula omitted] ceramics

Pb(Fe 1 2 Nb 1 2 )O 3 (PFN) ferroelectric ceramics with pure perovskite phase were prepared by the direct formation method. Mössbauer study of iron in PFN ceramics indicated that Fe 3+ and Fe 2+ ions could coexist in undoped PFN ceramics, and only Fe 3+ ions existed in PFN ceramics doped with MnO 2. All Fe 3+ and Fe 2+ ions were in the lower spin state and in [FeO 6] coordination state.