Frontiers of Materials Award Symposium: Nanocarbon-based Flexible Devices: Emerging Materials and Processes: Session I: Future of Nanoelectronics
Program Organizers: Mostafa Bedewy, University of Pittsburgh
Monday 8:30 AM
February 28, 2022
Room: 260A
Location: Anaheim Convention Center
8:30 AM Introductory Comments
8:35 AM Keynote
NOW ON-DEMAND ONLY - Nanoelectronics Grafted onto and within Colloids to Enable Colloidal Robotics: Michael Strano1; 1Massachusetts Institute of Technology
An unexplored property of 2D electronic materials is their ability to graft complete electronic circuits, transistors, memory and sensors onto and within colloidal micro- or even nano-particles. Such particles can then access fluid flow to impart mobility and enter spaces inaccessible to conventional electronic systems. We fabricate colloidal state machines as SU-8 particles powered and operation using various nanoelectronic circuit elements within the particle. We also developed an “autoperforation” technique for 2D materials that provides a means of spontaneous assembly for surfaces comprised of 2D molecular scaffolds. We demonstrate a variety of computational tasks performed using colloidal electronic particles, such as aerosolization and chemical sensing, logic and memory. This presentation will frame these advances in the context of accomplishing this larger vision of colloidal state machines.
9:15 AM Keynote
Design and Applications of Printable and Flexible Nanoelectronic Material Inks: Mark Hersam1; 1Northwestern University
Nanoelectronic materials based on carbon nanotubes, graphene, and related two-dimensional materials have emerged as promising candidates for next-generation computing and quantum technologies. While device prototypes have been demonstrated on idealized research-scale samples, scalable manufacturing remains a challenge for nanoelectronic materials. In parallel, the field of printed and flexible electronics has made significant progress towards roll-to-roll additive manufacturing based on organic and nanoparticle inks. This talk will explore recent work aimed at uniting these efforts by demonstrating inks that combine the superlative properties of nanoelectronic materials with the scalable manufacturing of printed electronics. To achieve this objective, multiple design goals have been concurrently optimized including ink formulation, printed structure morphology, and control of interfacial properties. By achieving high levels of nanoelectronic material ink homogeneity and printing fidelity, a variety of high-performance applications will be presented including neuromorphic devices, photodetectors, optical emitters, supercapacitors, batteries, and sensors.
9:55 AM Break
10:10 AM Keynote
Going where Silicon Cannot Reach: Print-in-place and Recyclable Electronics from Nanomaterials: Aaron Franklin1; 1Duke University
In this talk, recent progress towards print-in-place electronics will be discussed; print-in-place involves loading a substrate into a printer, printing all needed layers, then removing the substrate with electronic devices immediately ready to test. Inks from various nanomaterials enable this progress, including: 2D graphene and hexagonal boron nitride, 1D carbon nanotubes, and quasi-1D silver nanowires. Using an aerosol jet printer, functional 1D-2D thin-film transistors (TFTs) are printed without ever removing the substrate from the printer and using a maximum process temperature of 80 ºC with most processing at room temperature. To achieve this, significant advancements were made to minimize the intermixing of printed layers, drive down sintering temperature, and achieve sufficient thin-film electrical properties. Devices are demonstrated on various substrates, including paper. What’s more, recent progress towards a completely recyclable printed transistor will be discussed, fabricated entirely using nanoscale carbon-based inks.
10:50 AM Keynote
Direct-write of Laser Induced Graphene with Spatially Varying Properties on Polymers: Mostafa Bedewy1; 1University of Pittsburgh
High surface area nanocarbon electrodes for batteries, supercapacitors, and biosensors have consistently been shown to have superior performance when compared to metal electrodes. Nevertheless, major challenges hinder our ability to scalably produce nanocarbon-based electrodes with tailored morphology and surface chemistry, especially on flexible substrates. This talk focuses on a unique bottom-up approach for directly growing different types of nanocarbons on polymer films by laser irradiation. First, the talk will cover how this direct-write process, often referred to as laser-induced graphene (LIG), can be controlled to produces spatially-varying morphologies and chemical compositions, by leveraging gradients of laser fluence. Secondly, a method will be introduced to control the heteroatom doping of LIG electrodes based on controlling the atomic structure of the polymer being lased. Finally, a demonstration of these functional LIG electrodes as electrochemical biosensors will be presented for the detection of the neurotransmitter dopamine with nanomolar sensitivity.