Hayden Taylor's Biography

Hayden Taylor, Assistant Professor, Mechanical Engineering, University of California-Berkeley

Hayden Taylor is an Assistant Professor of Mechanical Engineering at the University of California, Berkeley. He holds B.A. and M.Eng. degrees in Electrical and Electronic Engineering from Cambridge University and a Ph.D. in Electrical Engineering and Computer Science from MIT. His research spans the invention, modeling and simulation of manufacturing processes. His group is particularly focused on processes that can be used to fabricate extremely rich and complex, multi-scale geometries, such as are found in semiconductor integrated circuits and biological tissues. Past work has addressed plasma etch, polymer bonding, chemical mechanical polishing, and mechanical exfoliation of van der Waals-bonded solids. He has particular expertise in mechanical lithography processes including micro-embossing and nanoimprint lithography. Current research activities have the following themes: (A) contact mechanics in materials processing, (B) surface engineering for heat and mass transfer, and (C) multi-scale additive manufacturing, including computed axial lithography.

Computed Axial Lithography For Volumetric Printing of Soft Structures

Tuesday, 15 October 2019 at 09:00

Add to Calendar ▼2019-10-15 09:00:002019-10-15 10:00:00Europe/LondonComputed Axial Lithography For Volumetric Printing of Soft Structures3D-Printing in the Life Sciences in Coronado Island, CaliforniaCoronado Island, CaliforniaSELECTBIOenquiries@selectbiosciences.com

Volumetric additive manufacturing is defined as producing the entire volume of a component or structure simultaneously — rather than by layering — and has been envisioned as a possible way to increase the speed of additive manufacturing. Until recently, however, no practicable technique existed for creating arbitrary 3D geometries volumetrically. Recently, we have demonstrated Computed Axial Lithography (CAL) to meet this need. CAL essentially reverses the principles of computed tomography (widely used in imaging, but not previously in fabrication) to synthesize a three-dimensionally controlled illumination dose within a volume of photocurable resin. The photosensitive volume rotates steadily while a video projector illuminates the material from a direction perpendicular to the axis of rotation. The illumination pattern typically changes >1000 times per revolution, so that light from many different projection angles contributes to the cumulative dose. Where the dose exceeds a threshold, the resin solidifies and the part is formed. In this talk I will discuss the CAL process in the context of its possible bioprinting applications. The CAL printing technique has several potential advantages. Because there is no relative motion between the component being printed and the resin during printing, the printing speed is not limited by resin flow effects, as it can be in layer-by-layer photopolymerization-based printing. The absence of relative motion also allows highly viscous resins or soft, highly compliant materials such as hydrogels to be printed. Because layers are not used in CAL, the surfaces of printed components are very smooth (c. 1–4 µm roughness in preliminary experiments), which may open up new applications. Additionally, it is possible to print objects around pre-existing solid objects that could have been made using a different material or process. This ‘overprinting’ capability suggests applications in mass-customization for end users and also potentially in fabricating biological structures with highly heterogeneous mechanical properties.

Add to Calendar ▼2019-10-14 00:00:002019-10-15 00:00:00Europe/London3D-Printing in the Life Sciences3D-Printing in the Life Sciences in Coronado Island, CaliforniaCoronado Island, CaliforniaSELECTBIOenquiries@selectbiosciences.com

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