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Effect of subphase pH on Langmuir-Blodgett deposition of graphene oxide monolayers on Si and SiO 2 /Si substrates AIP Conf. Proc. 1512, 708 (2013); 10.1063/1.4791234 Reduced graphene oxide produced by rapid-heating reduction and its use in carbon-based field-effect transistors J. Appl. Phys. 112, 033701 (2012); 10.1063/1.4739486 High-yield dielectrophoretic assembly of two-dimensional graphene nanostructures Appl. Phys. Lett. 94, 053110 (2009);

The optical properties and the theoretical prediction of color optical shutter with dye-doped polymer network liquid crystal (PNLC) were investigated. The view-angle dependence of reflectance according to the bias conditions showed distinctive characteristics, which could be explained from the effects of dye absorption and path length. It was also shown that the thickness dependence of reflectance was strongly influenced by the light-scattering coefficient. Our experimental results matched up well with the theoretical prediction based on the light scattering of liquid crystals in polymer network and the absorption of dichroic dye. This work indicates potential to improve the optical device using dye-doped liquid crystal-polymer composite.

Recently, we have developed 15.0 inch XGA organic TFT array and its LCD module, which might be world-largest array size and highest resolution in organic based device. This achievement is to be combined with several technical breakthroughs include new organic gate dielectric material, novel ohmic contact technique, and well-optimized process-architectures. Base on the newly developed organic gate dielectric with pentacene, we have obtained world-record field effect TFT mobilities in excess of 7cm 2 /Vsec and excellent on/off ratios as ~ 10 6 . For jumping up the OTFT research activities from laboratory scale to real production line, we have developed two key technologies. One is the new ohmic contact process with very common materials in the current LCD manufacturing such as ITO; the bottom contact structured OTFT with ITO source-drain electrode shows much the same performances as that with gold source-drain electrode. The other key technology to realize the large size organic device is that of optimizing the array structure to minimize the OTFT performance degradations. By combining these novel technologies, a 15.0" XGA prototype LCD panel is fabricated and shows good display performance.

New type of nonvolatile memories like FRAM, PRAM, MRAM which are capable of fast and unlimited write can ideally perform next generation high level mobile functions and are being focused as candidates for next generation mobile memory. Among new memory candidates, MRAM has the fastest speed, FRAM has the lowest power consumption and PRAM has excellent cell scalability. Such unique feature of each new memory candidate will be effectively utilized in next generation mobile electronics where memory function will be very diversified and specified as well as unified. In this paper, new memory technologies will be viewed in respect of current technology status, technical challenges encountered, and the solution for technology barriers.