Vat photopolymerization relies on the light-induced polymerization of liquid photopolymer to produce targeted structure. Among all polymers prepared by vat photopolymerization, due their numerous properties polyurethanes have recently gained great attention in industrial and academic fields. In this review article, recent progress printing techniques, resin compositions, applications related 3D...

A novel process based on the principle of layered photolithography has been proposed and tested for making three-dimensional micro-structures. An experimental setup was designed and built for doing experiments on this micro-fabrication process. An ultraviolet (UV) excimer laser at the wavelength of 248 nm was used as the light source and a single piece of photo-mask carrying a series of two dim...

Liquid crystal displays (LCDs) are widely used as spatial light modulators (SLMs) in many applications (optical signal processing, holographic data storage, diffractive optics...). In particular, as an alternative microoptics recording scheme we have explored the possibility to use a LCD to display the diffractive optical element (DOE) to be recorded onto a photosensitive phase material, so as ...

Dark polymerization of active radicals at post-exposure is investigated in SiO2 nanoparticles and phenathrenequinone dispersed poly(methyl methacrylate) photopolymer experimentally and theoretically. In experiments, the grating formation and improvement of photosensitivity due to SiO2 nanoparticles at short exposure and post-exposure are presented. For analyzing the contribution of dark reactio...

Failures of vascular grafts are normally caused by the lack of a durable and adherent endothelium covering the graft which leads to thrombus and neointima formation. A promising approach to overcome these issues is to create a functional, quiescent monolayer of endothelial cells on the surface of implants. The present study reports for the first time on the use of photoembossing as a technique ...