Functional Nanomaterials 2020: Translating Innovation into Pioneering Technologies: Translating Innovation into Pioneering Technologies III
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 8:30 AM
February 25, 2020
Room: Point Loma
Location: Marriott Marquis Hotel
Session Chair: Nasrin Hooshmand, Georgia Tech; Jaeyun Moon, University of Nevada - Las Vegas
8:30 AM Invited
Multifunctional Flexible Optoelectronic Systems for Bio-interfacing: Luyao Lu1; 1George Washington University
Recent advances in new materials, electronics, and assembly techniques have allowed optoelectronic systems to interface with biology and contribute significantly to the progress in basic neuroscience and cardiovascular research as well as clinical medicine. In this talk, I will introduce a novel class of flexible, multifunctional optoelectronic systems that combines high-performance nanoscale electrodes with microscale optical components for simultaneous electrophysiological recording under optogenetic modulation. We envision this unique technology will open up new windows to understanding the brain and heart by enabling mapping the dynamics of perturbed cell populations and correlating cellular responses to behavior.
8:50 AM
On the Design of Novel 2D Particulates from MAB Phases: Surojit Gupta1; 1University of North Dakota
Recently, MAB Phases have attracted lot of attention due to their unique nanolaminated structure. Several researchers have synthesized MoAlB, Mn2AlB2, and Fe2AlB2 in single phase dense form. Like MAX Phases which are used as template for manufacturing MXenes, it is expected that novel 2D phases can be synthesized by using MAB Phases as precursors. In this presentation, I will review and present novel manufacturing techniques by which MoAlB, Fe2AlB2, and Mn2AlB2 can be used as template for designing 2D Phases. The microstructure and physical properties of nanomaterials designed from MAB phases will be presented. It is expected these materials can be used in different multifunctional applications.
9:10 AM Invited
Study on Photocatalytic Performance of Bi2MoO6/Ag3PO4 z-scheme Composites: Jaeyun Moon1; Kaleab Ayalew1; 1University of Nevada Las Vegas
Photocatalytic functional materials have been considered a potentially effective way to address environmental and energy problems since they can directly convert abundant solar energy into usable energy resources, and produce hydroxyl group radicals capable of destroying pollutants and certain microbes in a given medium. Recently, Bi2MoO6/Ag3PO4 z-scheme is of particular interest because of its exceptional photocatalytic performance. In this study, we demonstrated that this material system satisfies the most requirements for efficient photocatalysts, such as high redox ability, narrow bandgap energy, and efficient charge-separation. It was also verified that light absorption and charge separation of the z-scheme photocatalysts were significantly affected by nanomaterials’ morphology, interface, and chemical composition. Bi2MoO6/Ag3PO4 composites with different morphologies have been synthesized and characterized in terms of physical, chemical and optical properties as well as photocatalytic performance under different light sources.
9:30 AM Keynote
Tailored Nanomaterials for Advanced Environmental Processes: Sherine Obare1; 1UNC Greensboro
In spite of recent discoveries and technological progress in science, there remains a need for advances in the detection and remediation of toxic environmental pollutants. Nanoscale materials are of great interest due to their tunable properties that allow their development to address modern-day environmental challenges. We have developed synthetic procedures that produce gram-scale, well-defined and monodisperse nanoparticles with controlled size and shape. The results are paramount toward understanding and developing advanced materials for catalysis for the degradation of toxic environmental pollutants. The advantage of the designed catalysts is their ability to minimize the formation of side products. Furthermore, nanoparticles functionalized with biologically and environmentally relevant molecules have been developed to detect toxic organophosphorus pesticides and distinguish between them, allowing significant tools for the environmental and agricultural industries. The presentation will focus on the development of the nanoscale catalysts and their critical assessment for environmental processes.
10:10 AM Break
10:30 AM Invited
Biomimetic Composites with Self-organized Aramid Nanofibers: Lizhi Xu1; 1The University of Hong Kong
Natural load-bearing soft tissues exhibit amazing properties that are difficult to replicate with synthetic materials. Their unique combination of high water content, stiffness, strength, toughness and deformability is possible due to sophisticated and reconfigurable networks of stiff collagen nanofibers and soft biomacromolecules. Here we present water-rich biomimetic composites that emulate the collagen-proteoglycan network in soft tissues at multiscale levels. The hydrogen bonding between stiff aramid nanofibers and soft poly(vinyl alcohol) afford synergistic stiffening and toughening, allowing the nanofiber network to self-organizes under stress for effective load bearing and energy dissipation. They exhibit mechanical properties parallel or superior to those of load-bearing soft tissues, e.g., articular cartilage, forming the foundation for development of a new class of load-bearing biomaterials.
10:50 AM Invited
Biogenic Nanoparticles on Exoelectrogens: Seokheun Choi1; 1State University of New York at Binghamton
Electromicrobiology is an emerging field of study that investigates microbial electron exchange with external electrodes and microbial electrochemical functionalities. Significant advances in electromicrobiology have occurred, led by impressive discoveries of “Exoelectrogens,” which are microorganisms capable of direct electron transfer to electrodes. By incorporating exoelectrogens into a bioelectrochemical cell, the combined biotic-abiotic system offers a solution for environmental sustainability by generating renewable bioelectricity with organic waste while producing value-added chemicals/biofuels. Despite its vast potential, however, the technology’s promise has not yet been translated as application (or market demand) because of its low power generation. Bacterial metallic nanoparticles synthesized from bacterial metabolism are garnering considerable attention because of their high potential for facilitating microbial extracellular electron transfer. In this study, exoelectrogens will be demonstrated to be capable of synthesizing conductive nanoparticles which improve the electron transfer efficiency and thus significantly increase the power performance in the bioelectrochemical cell.
11:10 AM Invited
Carrier Lifetime Dependence on Annealing Conditions in CuxOy Thin Films: A Transient Absorption Study: Susanne Ullrich1; Learnmore Tanaka Shenje1; 1University of Georgia
Ultrafast transient absorption spectroscopy has been used to study charge carrier dynamics in Copper(I) and Copper(II) oxide thin films, produced under various annealing conditions, as a function of Cu2O/CuO composition. Following across bandgap excitations, deactivation proceeds via free and trapped excitonic states in pure Cu2O, whereas CuO shows free carrier relaxation via shallow and deep (midgap) trap states. These observations serve as a reference in the characterization of a series of mixed phase (Cu2O/CuO) samples with increasing amounts of CuO. Generally, across bandgap excitation of the CuO phase results in deactivation within the same phase and the same is true for Cu2O excitation in some of the samples. Most interesting, however, is the observation of charge transfer dynamics from the Cu2O phase to CuO for samples prepared under certain annealing conditions. These processes are measured to occur on time scales of a few picoseconds.
11:30 AM Invited
Self-healable, Fully Recyclable and Malleable Electronic Skin based on Dynamic Covalent Thermoset Nanocomposite: Jianliang Xiao1; 1University of Colorado Boulder
Electronic skin (e-skin) mimicking functionalities and mechanical properties of natural skin can find broad applications. We here demonstrate a robust yet rehealable, fully recyclable and malleable e-skin based on dynamic covalent thermoset doped with conductive silver nanoparticles. Tactile, temperature, flow and humidity sensing capabilities are realized. The e-skin can be rehealed when it’s damaged, and can be fully recycled at room temperature. After rehealing or recycling, the e-skin regains mechanical and electrical properties comparable to the original e-skin. In addition, malleability enables the e-skin to permanently conform to complex, curved surfaces without introducing excessive interfacial stresses. These properties of the e-skin yield an economical and eco-friendly technology that can find broad applications in robotics, prosthetics, healthcare and human-computer interface.