Mechanical and Aerospace Engineering Colloquium

December 4, 2019
December 4, 2019
Speaker: Luis Pereira, PhD
                NOVA School of Science and Technology    
Title: Nature-based and nature-inspired functional materials for sustainable electronic devices
Location: Easton Hub Auditorium
                 Fiber Optics Building
Time: 3:30 p.m. to 4:30 p.m.

Abstract: The growing demand of new and sustainable consumer printed electronics led to the increased interest in devices integrating natural materials. Here we present the wok resulting from recent research concerning the application of cellulosic materials and suberin (a cork component) in flexible electronic devices. First topic to be addressed are printable inks based on carbon fibers and zinc oxide nanoparticles mixed with cellulose derivatives that were optimized to create printed active layers at temperatures lower than 150 °C. This allowed the development of fully screen-printed sensors and electrolyte gated transistors on paper substrates. Second topic is related to with the development of electrolytic membranes to be used as dielectric in transistors exploring the high capacitance that can be obtained by the formations of electric-double layers. The optimization of the cellulose dissolution method in alkaline hydroxides allowed for self-healable ion-conducting membranes. Addition of suberin introduce anti-microbial characteristics to these membranes. Finally, we will show how cellulose nanocrystals can self-assemble in a chiral nematic structures that mimic structures existing in nature. These can be then used as dielectric in field effect transistors making possible the detection of circular polarized light in such devices.

Bio: Prof. Luis Pereira was born in Lisbon, Portugal, in 1977. He received the Engineering degree in Materials Science in 2001 and has finished the Ph.D. in Microelectronics and Optoelectronics in 2008. His Ph.D. work was focused on polycrystalline silicon and high k dielectrics for TFT’s application. The expertise gained on oxide materials for electronics allowed focusing the pos-doc activities on the development printed inorganic nanostructured materials for chromogenic, electronic and electrochemical devices on paper and plastic substrates. He was involved in the team that demonstrated for the first-time transistors made of oxides with paper as dielectric. He has authored and co-authored 163 publications in peer-reviewed journals and proceedings of the ISI with more than 6000 citations and has a H factor of 40 (web of science). He is currently Associate Professor at NOVA School of Science and Technology and researcher at CENIMAT/I3N where coordinates and participates in R&D projects. He has been granted in 2015 with a Starting Grant of the European Research Council (ERC) on the development of cellulose nanocomposites for paper electronics (New-Fun, project 640598). His current research interests are on the design and synthesis of 1D, 2D and 3D inorganic and hybrid nanostructures, chiral cellulose nanocomposites, functional micro and nanofibers and it integration on chromogenic, electronic and electrochemical devices
For additional information, please contact Professor Aaron Mazzeo at or 848-445-0504.