Femtosecond microfabrication techniques, such as multi-photon polymerization, enable the production of precise micro-optics and microneedles. Micro-optics can be directly printed on functional devices, offering possibilities for miniaturized sensing technologies. Microneedles produced through MPP can be used for drug delivery or diagnostics and their shapes can be customized for specific applications. Direct laser writing enables the combination of additive and subtractive technologies to create integrated systems, such as the incorporation of silica and polymer structures for passive chemical sensing applications. Glass microstructures created by selective laser etching can be combined with polymeric structures to study the mechanical properties of polymeric structures.
One of the best ways to produce them is the multi-photon polymerization technique which enables the production of precise and firm microneedles. Even more complex shapes of polymeric needles can be obtained by maintaining the high sharpness of the needle tips.
By selective laser etching (SLE), glass microstructures can be made and polymeric structures can be integrated into the glass microstructures using multiphoton polymerization (MPP).
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Microfabrication by multi-photon polymerization is a direct laser-write technique which allows 3D structuring of photopolymers at the micro- and nano-scale.
Multiphoton-polymerization (MPP) is a technology that enables the production of arbitrary shape polymeric structures within submicrometric resolution. First, a photoresist sample is prepared by drop-casting polymer material mixed with a photoinitiator on the glass slide and then pre-baking.
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A feasibility study is composed of several steps, including researching methods for fabricating micro-structures, fabricating a micro-structure prototype, measuring and aligning the prototype with technical requirements, and finally preparing a study report.