Development of Polymer Microneedle upon Exposure of Hollow Gaussian Beam on Unconstraint Depth Resin

This paper presents characterization of unconstraint depth photopolymerization yielding different forms of cured voxel under exposure of hollow Gaussian beam. The governing model consists of nonlinear Schrodinger equation along with transient diffusion phenomenon and intensity dependent refractive gradient is considered in predicting the curing behaviour. The effect of various process parameters viz; intensity of and degree of hollowness of Gaussian beam, time of exposure on the formation of cured voxel is presented in this paper. Typical of cured voxel resembles hollow microneedle under certain conditions of exposure. The study proposes potential possibility to be used as one of the methods to develop hollow microneedle being used in many biomedical applications for effective drug delivery. (paper)