Meeting ID: 935 0150 9391
Abstract: There is currently an increasing interest to pattern 2D/3D solution-based materials (i.e. inks) using additive manufacturing. Resulting printed multifunctional structures can be utilized in numerous applications, from energy to sensing and soft robotics. Therein, we focus on direct ink writing (DIW) fabrication which is capable of extruding inks at room temperature using external pressure. Inks of disparate phases and a wide range of viscosities can be patterned, on digitally pre-defined substrate locations, with µm resolution through a robotically-controlled nozzle. Although the DIW process is conceptually straightforward, there are still a few important challenges that need to be tackled before wider adoption. These challenges are interrelated spanning ink synthesis and formulation, equipment development, quantification of printability, post-processing, and resulting printed parts properties. During this talk we will discuss some of our groups’ latest projects related to DIW of multifunctional materials. More specifically, DIW of emulsions for fabricating 3D hierarchical foam photocatalytic structures will be presented along with the development of directly written graphene gas sensors. Additionally, I will be presenting our unconventional approach to pattern and texture thin films using surface-force driven direct writing of low viscosity inks. Through these examples I will illustrate the versatility and future potential of this method.
Bio: Kostas Sierros is currently an Associate Professor with the Mechanical and Aerospace Engineering Department at West Virginia University (WVU). Kostas holds a BS in Mechanical Engineering from the University of Newcastle Upon Tyne (UK), an MS in Polymer Engineering and Science, and a PhD in Materials Science both from the University of Birmingham (UK). Kostas founded and leads the Flexible Electronics and Sustainable Technologies (FEST) lab at WVU. The mission of FEST is to create new knowledge about the additive manufacturing of novel multifunctional materials and devices for energy, sensors, and soft robotics. Kostas has more than 100 technical publications, including 4 patents. His current research is supported by the US Department of Energy, National Science Foundation, National Aeronautics and Space Administration, and industry.