Frontiers of Materials Award Symposium: 2021 Functional Nanomaterials: Translating Innovation into Pioneering Technologies: Session III
Program Organizers: Huanyu Cheng, Pennsylvania State University
Tuesday 8:30 AM
March 16, 2021
Room: RM 16
Location: TMS2021 Virtual
8:30 AM Invited
Programmable Gold Nanowire Electronic Skins and Tattoos: Wenlong Cheng1; 1Monash University
Sensitive, specific yet multifunctional tattoo-like electronics are ideal wearable systems for health monitoring anytime anywhere because they are virtually becoming parts of Human skins offering burdenless “unfeelable” wearing experience. Here, I will present the skin-like, multifunctional electronic skins and tattoos using standing enokitake mushroom-like vertically aligned nanowire. Among various materials of choices, gold has advantages of biocompatibity, chemical inertness, facile synthesis/Surface functionalisation and band-gap-matching with a lot of semiconductors materials. In this talk, I will discuss our newly developed standing gold nanowire-based soft biosensing platform in the forms of patches, fibers and tattoos. Combining it with local cracking technology, we can arbitrarily fine-tune desired sensitivity and stretchability of a gold nanowire electronic tattoos by programming localized crack size, shape and orientations. Furthermore, we demonstrate in-plane integration of strain/pressure sensor, anisotropic orientation-specific sensors, strain-insensitive stretchable interconnects, temperature sensors, glucose sensors, and lactate sensors without the need of soldering or gluing.
9:10 AM Keynote
Wearable Gas Sensors with Wireless Communication and RF Energy Harvesting Capabilities: Huanyu Cheng1; 1Pennsylvania State University
Small-footprint deformable gas sensors that can be deployed on the skin surface to detect and distinguish multiple compounds in real-time are integral to accurate monitoring of health conditions. Low-dimensional nanomaterials or mixed metal oxides are state-of-the-art gas sensing materials that change their resistance upon binding of various target gases. However, it is challenging to integrate within a microscale footprint the numerous nanomaterials required to deconvolute signals from complex gaseous mixtures. The core innovation will be our ability to use laser writing to synthesize and pattern numerous nanomaterials on laser-induced graphene gas sensing platform in order to facilitate the deconvolution of complex gas responses in mixtures. When combined with the stretchable antennas for wireless communication and rectennas for ambient RF energy harvesting, wearable gas sensors for health monitoring or toxic gas detection open new opportunities in epidermal electronic devices to enhance the operator and mitigate exposure.
9:50 AM Invited
Engineering Self-folding and Shape Morphing in Patterned Materials: David Gracias1; 1Johns Hopkins University
Heterogeneous materials that fold or change shape either spontaneously or in response to environmental stimuli are intellectually intriguing as they are widely observed in nature and living systems. The development of strategies to design, fabricate and engineer such materials is also technologically relevant as it can lead to 3D, smart, adaptive, and autonomous structures and devices. In this talk, I will highlight our efforts to utilize state-of-the-art micro and nanopatterning of materials ranging from atomistic films to hydrogels combined with thin film strain mismatch, capillary forces and differential swelling to create structures that fold and change shape either spontaneously or in response to stimuli including temperature and biochemicals. I will also discuss how these methods and material processing and patterning techniques can enable new technological advances, including 3D atomistic and shell sensors, shape-shifting DNA hydrogel robots, and autonomous untethered surgical tools.
10:30 AM Invited
Flexible Printable Bioelectronics Devices: Wearable Biosensors and Bioenergy Harvesters: Joseph Wang1; 1University California, San Diego
Printed flexible electrochemical devices have received a considerable recent attention in the fields of wearable devices and mobile health. This presentation will describe stretchable and self-healed printable electrochemical devices, based on novel ink materials, that endure extreme deformations commonly experienced by the human skin. These advances have thus led to the development of printable bioelectronic devices that can fold, bend, stretch, and repair, while maintaining remarkable analytical and energy-harvesting performance. Technical challenges and opportunities for fabricating such reliable stretchable textile-based and skin-worn electrochemical sensors and biofuel cells will be discussed, along with several demonstrations of several wearable platforms and prospects for future healthcare applications.