Functional Nanomaterials 2020: Translating Innovation into Pioneering Technologies: Translating Innovation into Pioneering Technologies IV
Sponsored by: TMS Functional Materials Division, TMS: Nanomaterials Committee
Program Organizers: Simona Hunyadi Murph, Savannah River National Laboratory; Huanyu Cheng, Pennsylvania State University; Yong Lin Kong, University of Utah; Min-Kyu Song, Washington State University; Ning Zhang, Baylor University
Tuesday 2:00 PM
February 25, 2020
Room: Point Loma
Location: Marriott Marquis Hotel
Session Chair: Nasrin Hooshmand, Georgia Tech; Yong Lin Kong, University of Utah
2:00 PM Invited
2D-Materials-based Epidermal and Implantable Bioelectronics: Hongwoo Jang1; Nanshu Lu1; 1University of Texas at Austin
2D materials are emerging materials for bioelectronics. We have invented a cost- and time-effective “cut-and-paste” process for the rapid prototyping of CVD graphene e-tattoos (GETs). Tensile fracture of PMMA-supported graphene has been experimentally investigated and different stages of fracture have been identified. GET can fully conform to the microscopic morphology of the skin surface via just van der Waals forces. As a dry electrode, GET-skin interface impedance is found to be as low as medically used Ag/AgCl gel electrodes. GET has been successfully applied to measure electrocardiogram (ECG), electromyogram (EMG), electroencephalogram (EEG), electrooculogram (EOG), skin temperature, and skin hydration. Noninvasive functionalized graphene glucose sensor can be integrated with transdermal drug-delivery microneedles. Wireless e-tattoos exploring the modular and reconfigurable design will be introduced. In addition to noninvasive e-tattoos, we have engineered human eye-inspired implantable curved image array using atomically thin MoS2-graphene heterostructure.
2:20 PM
Multiscale 3D Printing of Nanomaterials-based Biomedical and Functional Devices: Yong Lin Kong1; 1University of Utah
My research group focuses on the development of 3D printing technologies to create multifunctional structures and devices that cannot be fabricated with conventional fabrication methods. We seek to advance the scientific understanding of the assembly and processing of functional nanomaterials to functionalize a wide range of constructs. Developing the ability to 3D print various classes of materials possessing distinct properties could enable the freeform generation of active electronics in unique functional, interwoven architectures. Here we are developing a multi-scale extrusion-based 3D printing approach that enables the integration of diverse classes of materials to create a variety of 3D printed electronics and functional devices with active properties that are not easily achieved using standard microfabrication techniques. As an example, I will highlight the development of 3D printed quantum-dots light-emitting diode, which extended the reach of 3D printing and demonstrated that active electronic materials and devices can be entirely 3D printed.
2:40 PM Invited
Plasmonic Biosensors for Resource-limited Settings: Limei Tian1; 1Texas A&M University
Plasmonic biosensors are considered to be highly promising for the development of simple, portable, sensitive, on-chip biodiagnostics for resource-limited settings. While there has been a tremendous progress in the rational design of plasmonic nanotransducers with high sensitivity and the development of hand-held read-out devices, the translation of these biosensors to resource-limited settings is hindered by the poor thermal, chemical and temporal stability of biorecognition elements. Degradation of the sensitive reagents and biodiagnostic chips compromises analytical validity, preventing accurate and timely diagnosis. In this talk, I will present the design and implementation of plasmonic biosensors that rely on ultrastable biorecognition elements. This approach overcomes the poor stability of existing plasmonic biosensors and takes them closer to real-world applications in resource-limited settings.
3:00 PM Invited
Soft, Spongy, and Conductive Materials for Human Motion Monitoring: Zhengtao Zhu1; 1South Dakota School of Mines and Technology
Wearable systems consisted of conformable and lightweight biomedical/strain sensors, power sources, and wireless modules have broad application potentials in human motion monitoring, medical, human-machine interface, safety, and soft-robotics. Our research in this area focuses on combination of conductive nanofibers/polymers and soft scaffold materials (such as elastomers and hydrogels) to design multi-component and multi-functional composite materials. In this talk, I present our recent work on soft, spongy, and conductive materials prepared for wearable human motion monitoring. Three-dimensional (3D) conductive sponge is assembled by freeze-drying of shortened electrospun nanofibers of polyacrylonitrile (PAN), polyimide (PI), and carbon. Highly flexible and compressible conductive sponge is also prepared by one-step dip coating the commercial melamine sponge (MS) in an aqueous dispersion of poly(3,4-ethylenedioxy thiophene):poly(styrenesulfonate) (PEDOT:PSS). Versatile pressure sensors and prototype tactile sensory array based on these pressure sensors are demonstrated.
3:20 PM Invited
Carbon Nanotube Nanoelectronics and Macroelectronics: Chongwu Zhou1; 1University of Southern California
Carbon nanotubes hold great potential but also face significant challenges for various electronic application, such as nanoelectronics, RF electronics, macroelectronics, and printed electronics. Regarding nano- and RF electronics, obtaining high-density horizontally aligned carbon nanotubes with high semiconducting purity (>99.99%) has been an important but elusive goal, and we have developed ways for aligned nanotube synthesis, growth of predominantly semiconducting nanotubes, nanotube cloning, and more recently wafer-scale assembly of pre-separated semiconducting nanotubes, which have also been used to produce RF transistors with fT and fmax simultaneously larger than 70 GHz. In addition, we have demonstrated that carbon nanotube networks based on pre-separated semiconducting nanotubes hold great promise for thin film transistors and macroelectronics, and have been successfully used for active-matrix organic light emitting diode displays, liquid crystal displays, and also hybrid circuits. Furthermore, we will report our progress of printed nanotube electronics, including the demonstration of self-aligned printed submicron transistors.
3:40 PM Break
4:00 PM Invited
Adding a New Sensing Dimension to Soft Electronics: from the Skin to Below the Skin: Sheng Xu1; 1University of California, San Diego
Soft electronic devices that can acquire vital signs from the human body represent an important trend for healthcare. Combined strategies of materials design and advanced microfabrication allow the integration of a variety of components and devices on a stretchable platform, resulting in functional systems with minimal constraints on the human body. In this presentation, I will demonstrate a wearable multichannel patch that can sense a collection of signals from the human skin in a wireless mode. Additionally, integrating high-performance ultrasonic transducers on the stretchable platform adds a new third dimension to the detection range of conventional soft electronics. Ultrasound waves can penetrate the skin and noninvasively capture dynamic events in deep tissues, such as blood pressure and blood flow waveforms in central arteries and veins. This stretchable platform holds profound implications for a wide range of applications in consumer electronics, sports medicine, defense, and clinical practices.
4:20 PM Invited
Bioinspired Freeze-cast Nanostructured Materials Templated by Energized Fields: Steven Naleway1; Isaac Nelson1; Tony Yin1; Debora Lyn Porter1; Taylor Ogden1; Max Mroz1; Paul Wadsworth1; 1University of Utah
Freeze casting is a bioinspired technique for the fabrication of tailored, porous ceramic materials with structuring down to the nanoscale. Mimetic of the growth of mammalian bone and other biomaterials where biopolymers template the deposit of biominerals to create complex composites, freeze casting employs a template of growing ice crystals to create a complex porous microstructure in any ceramic. We propose that this bioinspired technique can be controlled through either intrinsic (those that modify from within by altering the constituents) or extrinsic (those that apply external forces or templates) means. Through these classifications, examples of extrinsic (through energized external fields) freeze cast, bioinspired structures will be discussed with a focus on providing advanced control of the final material structure and properties. Applications in energy and filtration technologies will be discussed.
4:40 PM
Mask-less Direct-write Lithography Using Functional Micro/nanofibers on Flexible Substrate: Jonghyun Kim1; Dongwoon Shin1; Jiyoung Chang1; 1University of Utah
From mask-based photolithography to mask-less lithography, a variety of techniques has been explored to meet the increasing demand for scalable, customizable, and affordable lithography. However, the currently-available, state-of-the-art methods still require access to expensive tools and facilities. Herein, we present electromagnetic wave modulating fiber-based photolithography platform that provides a direct-write reusable mask, variable features, mark-free alignment, and high-throughput, all packaged in table-top form factor and available at low-cost. The birefringence is implemented in the fiber that allows the ultraviolet that only passes through the fiber to reach the photoresist. Near-field electrospinning is used to produce precisely written micro-fibers to achieve controlled patterning of the photolithography. The suggested novel exposure system based on electromagnetic modulator will be applicable in interdisciplinary fields by leveraging its facile, versatile, scalable, low-cost, compact form factor.
5:00 PM Invited
Rubbery Electronics: Electronics Fully Made Out of Rubbery Materials: Cunjiang Yu1; 1University of Houston
Seamlessly merging electronics with human is of imminent importance in addressing grand societal challenges in health and joy of living. However, the main challenge lies in the huge mechanical mismatch between the current form of rigid electronics and the soft curvy nature of biology. Here, I will present a new form of electronics, namely “rubbery electronics and bioelectronics”, with skin-like softness and stretchability, which is constructed all based upon elastic rubbery electronic materials. These rubbery electronic materials are structured in the format of composites, which can be scalably manufactured from common and commercial available materials without dedicated and complicated synthesis. Specifically, we build nanofibril organic semiconductors percolated in the elastomeric polymer matrix in a composite format for the rubbery semiconductors. I will present fully rubber format devices, including transistors and sensors, logic gates, active matrices, elastic sensory skin systems, and biointegrated devices, etc.