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Title: 3-Dimenstional microstructural fabrication of foturanTM glass with femtosecond laser irradiation
Keywords: 3D, Multi-level, Monolithic, Microstructural fabrication, Foturan, Femtosecond laser,
Issue Date: 1-Dec-2009
Citation: TEO HONG HAI (2009-12-01). 3-Dimenstional microstructural fabrication of foturanTM glass with femtosecond laser irradiation. ScholarBank@NUS Repository.
Abstract: Glass-ceramic (GC) materials have a wide spectrum of applications in numerous industrial, commercial and scientific disciplines. The ability to fabricate intricate structures in GC materials represents an important technological capability in various application areas, such as optics, photonics and biological applications. A monolithic 2-level 3-dimensional (3D) micro-mixer with internally embedded microstructural channels and reservoirs was fabricated within a commercially available photosensitive glass, FoturanTM for the investigation of its mixing capabilities. Designs of the 3D micro-mixer with multi-channel micro-reservoirs and micro-channels were conceptualized using the MasterCam software. The capillary flow of the HF etchant during etching of the final fabricated micro-mixer structure was made to optimize the fabricated designs for their potential applications. The designed microstructural patterns were transferred using direct laser writing by a femtosecond laser. Thermal treatment was used to stabilize the laser-written microstructures. Preferential isotropic HF etching selectively removed areas exposed by the laser, thereby allowing the fabrication of 3D structures in FoturanTM. The fabricated 3D internal mixer was subsequently characterized by their structural forms in their intermediate fabrication process with respect to the shape and structure conformity to the original design after the laser irradiation, thermal annealing and HF etching. Finally, the applicability and functionality of the 3D internal mixer were tested by mixing 2 hydrophilic water-based coloured dyes. The mixing capability of the micro-mixer was successful demonstrated by the mixing of the blue and yellow dyes to achieve a green coloured dye mixture as well as mixing red and yellow dyes to obtain an orange dye.
Appears in Collections:Master's Theses (Open)

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