Papers by Keyword: Photosensitive Material

Abstract: Nowadays, 3D printing technology is the national theme in Vietnam. Most countries have national strategies in research and development and widely apply 3D design and printing to all industries, organizations and people. 3D printing technology has been applied in many industries such as automotive, aviation, health, construction, electronics ... Almost all Digital Light Processing (DLP) 3D printing machine on ​​domestic market are imported from Chinese, Korean manufacturers ... with medium quality but high cost. The paper presents a study of application of selected design methods and tools of engineering design process to design DLP 3D printer driver with lower cost but equivalent quality with the other machine in series on the market that are imported from China.

Abstract: TiO₂, as photosensitive materials, has attracted much attention owing to its potential application in the solution of environmental pollution during the past decades. Four doped TiO₂ systems were constructed and studied by using the first principle based Density Functional Theory .The results indicate that P-doped and N-doped TiO₂ all have better light absorption in the visible light area than pristine TiO₂ although the band gap of N-doped system reduced less. However, the band gap of F-doped and Cl-doped TiO₂ increase a little, which causing the absorption to decrease. We suggest from the results that the P atom and N atom are valuable in the modification of TiO₂.