2020 Technical Division Student Poster Contest: FMD 2020 Technical Division Undergraduate Student Poster Contest
Sponsored by: TMS Extraction and Processing Division, TMS Functional Materials Division, TMS Light Metals Division, TMS Materials Processing and Manufacturing Division, TMS Structural Materials Division
Program Organizers: TMS Administration
Monday 5:30 PM
February 24, 2020
Room: Sails Pavilion
Location: San Diego Convention Ctr
SPU-1: Development of an All Solid- state Printed Carbon Electrode Utilizing Nickel Oxide/oxyhydroxide for Phosphate Detection: Sotoudeh Sedaghat1; Sookyoung Jeong1; Armin Zareei1; Samuel Peana1; Nicholas Glassmaker1; Rahim Rahimi1; 1Purdue University
Phosphate is known to play many key roles in human metabolism and plant growth. Although, its uncontrolled level may cause severe environmental and health issues. In order to avoid the problems associated with phosphate, its determination has got attention. Various approaches were developed for phosphate determination, among which electrochemical methods have shown to provide fast, simple and in-field measurement. Over the years, cobalt-based solid-state phosphate sensing electrodes were developed as potentiometric sensors. Many efforts have been made to replace cobalt with other materials to overcome its disadvantages such as high cost, low-selectivity and toxicity. Here we introduce a nickel-based solid-state electrode prepared by anodic electrodeposition of nickel oxide on printed carbon (Ni-PrC). The electrode characterized by FE-SEM, EDS and tested for potentiometric phosphate detection yielding a fast and linear response of -78.48 mV/decade within a concentration range of 10-6-10-1 M with high stability, reusability and phosphate selectivity.
SPU-2: Electrochromic Phase Transition in Sn-based Mixed Halide Perovskite: Ryan Hawks1; Zhizhong Chen1; Jian Shi1; 1Rensselaer Polytechnic Institute
Smart photovoltaic windows are a green technology that allows for adjustable transparency and functionality as a solar cell. Cesium tin iodide/ bromide serves as a non-toxic potential candidate for its absorbing component as the intrinsic materials may have an electrochromic phase transition under applied voltage. In this work, both the thermochromic and electrochromic phenomenon in cesium tin iodide/ bromide thin films are being explored. Thin films are synthesized from solution using a doctor blade method onto an ITO/glass slide and are capped with polydimethylsiloxane to prevent oxidation. Thermochromic behavior is verified by directly heating the film and observing a visible color change, denoting a phase transformation. The electrochromic phenomenon caused by joule heating is studied as a function of applied bias and current density, with devices developed to measure performance and stability. Our work suggests a possible solution for future smart windows
SPU-4: Facile Route to Fabricate Binder Free Ni(OH)2/RGO Core-shell Structure for Supercapacitors: Yusuf Khan1; Palash Chandra Maity1; Akansha R. Urade1; Spandan Choudhary1; Indranil Lahiri1; 1Indian Institute of Technology Roorkee
In the present work, we creatively synthesized a three-dimensional reduced graphene-oxide based Ni(OH)2/RGO core-shell structure using a very simple and low-cost process, followed by its dip coating on the Ni foam. The core-shell nanostructure was composed of Ni(OH)2 nanosphere at the core and RGO layers as shells. Synthesized Ni(OH)2 nanospheres were characterized by x-ray diffraction for crystal structure analysis. Core-shell morphology of Ni(OH)2/RGO hybrid was confirmed by transmission electron microscope. Presence of RGO in Ni(OH)2/RGO hybrid was confirmed by x-ray photon spectroscopy. The as-prepared Ni(OH)2/RGO hybrid was used as supercapacitor electrode for electrochemical measurements. Effect of annealing temperature on electrochemical properties of prepared electrode was also studied. Results of present study indicate that the Ni(OH)2/RGO core-shell hybrid can be a potential electrode material for supercapacitors.
SPU-6: Surface, Interface, and Temperature Effects on the Phase Separation and Nanoparticle Self Assembly of Bi-Metallic Ni0.5Ag0.5: A Molecular Dynamics Study: Reece Emery1; Philip Rack1; Ryan Allaire2; Abhijeet Dhakane3; P Ganesh3; Lou Kondic2; Linda Cummings2; Miguel Fuentes-Cabrera3; 1University of Tennessee, Knoxville; 2New Jersey Institute of Technology; 3Oak Ridge National Laboratory
Surface, interface, and temperature effects on phase separation and nanoparticle assembly of a 0.5Ni-0.5Ag bimetallic alloy were examined using classical Molecular Dynamics (MD). Bulk samples, droplets, and droplets deposited on a graphene substrate were investigated over a temperature range of 3000 K to 800 K, covering regions on the phase diagram of interest including the miscible liquid, immiscible liquid, liquid-crystal, and crystal-crystal regions. Phase separation temperature was found in agreement with the phase diagram by cooling the bulk sample over the given temperature range. With the introduction of free surfaces, phase separation was denoted by the formation of a core-shell nanostructure with surface effects driving Ag to form an outer-shell and Ni to the core. When deposited on a graphene substrate, phase separation was seen in conjunction with Ni layering on the substrate interface, and Ag driving to the free surface.