Recently, blue laser diode (oscillation wavelength : 405 nm) was developed. It has the shortest wavelength in useful semiconductor laser and is expected to be used or already used in applications for direct platemaking system called computer to plate (CTP), next generation disc, and so on. That is the reason materials sensitizing at 405 nm are needed. In this study, p-terphenyl derivatives and benzophenone derivatives were synthesized and the samples of photopolymer were prepared by using synthesized dyes, and the sensitivity for blue lader diode was investigated from the sensitivity spectra of these samples. p-Terphenyl derivatives showed no absorption at 400 nm and have little sensitivities at this wavelength. All benzophenone derivatives showed absorption at the range of 260-440 nm and have sensitivities at this wavelength. Benzophenone derivatives having dimethylamino group or oxyester group showed excellent sensitivities and the excellent sensitizing dyes for blue laser diode were demonstrated.
Plant cell walls with a diameter of 20-50 micro meters are called “cellulose fibers”. The micro-sized cellulose fibers have been used in daily life, such as in paper and clothes. We cannot see through ordinary paper because it’s constituent micrometer sized cellulose fibers and large cavities scatter light, which makes paper opaque. Now, we have developed transparent paper. Using cellulose—as in normal paper—and downsizing the fibers using a simple processing technique, they produced ‘transparent paper’ which, unlike many transparent plastics, does not expand significantly on heating. The transparent nanofiber paper could be a perfect match as substrates for continuous roll-to-roll processing in the future production of electronic devices such as flexible displays, solar cells, e-papers and a myriad of new flexible circuit technologies, and could replace the costly conventional batch processes based on glass substrates currently used. We project that it will also replace conventional paper as an advanced information medium that can still be produced using traditional paper-making equipment that is used in production today.
Monodispersed particles are defined as particle system with uniformity in size, shape, structure and composition. In this article, we are focused our attention on metal oxide nanoparticles with monodispersity, and their application to industrial use. The Gel-Sol method for the production of monodispersed particles with large quantities is introduced so that the fundamental knowledge on monodispersed nanoparticles can be understood. In addition, we will describe the synthesis method of functional nanoparticles of anatase TiO2 for photocatalyst and ITO for transparent conductive thin film.