Advances and Discoveries in Non-equilibrium Driven Nanomaterials and Thin Films: Poster Session
Sponsored by: TMS Functional Materials Division, TMS: Energy Conversion and Storage Committee
Program Organizers: Ritesh Sachan, Oklahoma State University; Srinivasa Rao Singamaneni, University of Texas at El Paso; Amit Pandey, Lockheed Martin Space; Nuggehalli Ravindra, New Jersey Institute of Technology
Tuesday 5:30 PM
February 25, 2020
Room: Sails Pavilion
Location: San Diego Convention Ctr
Session Chair: Ritesh Sachan, Oklahoma State University
N-1: In-situ Analysis of IR Laser Radiation Damage on Nano-structured MoS2: Kory Burns1; 1University of Florida
Two-dimensional materials (2DMs) have shown great potential as nanomaterials that could thrive in extreme environments. This contribution examines the response MoS2 to radiation at multiple length scales, with particular attention to local heating effects and deformation mechanisms. This contribution also seeks to understand the defect formation mechanisms in MoS2, while unveiling new ways to engineer twin boundaries, nanoparticles, quantum dots, and thin materials down to the monolayer from the bulk. All of these responses will be discerned in-situ using high resolution transmission electron microscopy (HR-TEM).
N-2: Scalable Synthesis of Graphene Quantum Dots and Its Application in Bioimaging: Vijayesh Kumar1; Abhay Sachdev1; 1CSIO-CSIR Chandigarh India
Scalable and economical synthesis of fluorescent graphene quantum dots using graphene oxide as precursor material is presented in this report. Graphene oxide was coated in bottom of double-necked round bottom quartz flask. One neck connected to a controlled hot air blower and other was connected to condenser which was connected to vacuum pump. The flask was heated at high temperature, hot air was passed in and vacuum pump was switch on. Graphene quantum dots were deposited on the walls of condenser which was dissolved out through acetone. Size and morphology were observed using transmission electron microscope and scanning electron microscope. Fourier transformation infrared spectroscopy indicated presence of oxygen containing groups which were responsible for fluorescence. Fluorescence of as synthesized materials was also recorded, presence of strong luminescence peaks at 375 nm, 391 nm and 516 nm. Fluorescence behavior of GQDs was applied for bioimaging of A-549 cancer cell-lines.
N-3: Synthesis of Mesoporous Metal-Silicates via Silicate-Exfoliation on Metal Hydroxides: Hong-Ping Lin1; Hsien-Ming Hsiao1; Yun-Chung Shen1; 1Department of Chemistry, National Cheng Kung University
Here, we provided a new non-templating method to prepare the metal/silica mesostructural platelets of high surface area, large pore size and pore volume by hydrothermally treating the metal hydroxides precipitate in an alkaline silicate aqueous solution. According to our results, a transformation model of “silicate-exfoliation asymmetric metal-silicate bilayer bilayer curving” should open a new synthetic strategy to prepare different mesoporous metal-silicates in nanotubule, nanofoam or cured nanoplatelet morphology on an industrial scale. For application, the copper-silicate with large surface area ( 250–350 m2g-1), high accessibility to the environment, and well dispersed CuO active sites would exhibit high efficiency in toxic-gas absorption. The resulted copper-silicate exhibits a high absorption affinity to the toxic phosphine (PH3) gas releasing from integrate circular industry even at [PH3] 500 ppb. The MnO-silicate demonstrates a high catalytic activity toward ozone decomposition. The nickel-silicate can be used as high-performance catalyst for NH3 oxidation.