Nanotechnology for Energy, Environment, Electronics, Healthcare and Industry: Session I
Sponsored by: ACerS Electronics Division, TMS: Mechanical Behavior of Materials Committee
Program Organizers: Gary Pickrell, Virginia Tech; Navin Manjooran, Solve
Monday 10:00 AM
October 18, 2021
Room: B242/243
Location: Greater Columbus Convention Center
Session Chair: Agnieszka Wusatowska-Sarnek, Commonwealth Fusion Systems; Navin Manjooran, Solve
10:00 AM
Fabrication and Characterization of Tungsten Nanopowder for Hard Alloy Manufacturing: Amir Abidov1; Ahror Fattahov1; Ulugbek Ruziev1; Ilhom Asadov1; Abdullo Khursanov1; Bum Sung Kim1; Fayzullo Norkhodjaev1; 1"Almalyk MMC" JSC
Tungsten nanopowder was synthesized using carbothermal reduction route from WO3 powder. It was investigated the effect of addition of prepared nanopowder to hard alloys. Field emission electron microscope was used for morphology investigation. X-ray diffractometry was used to analyze crystalline structure. It was found that addition of nanopowder increased bending strength by 15% compared to regular hard alloy. Effect of contamination of carbon in prepared nanopowder to mechanical properties of hard alloy was discussed
10:20 AM
Viral Inactivation Using Localized UV Emission and Application in Self-cleaning PPE: Udit Kumar1; Craig Neal1; Candace Fox1; Elayaraja Kolanthai1; Griffith Parks1; Sudipta Seal1; 1University of Central Florida
COVID-19 has shaped up to be one of the defining challenges of our lives. It has proven to be such a challenge due to its ability to spread quickly. One of the primary modes of spread is surface to surface contamination. To combat it, we propose a novel antiviral conformal nano-coating on PPE surfaces. UV radiation has traditionally been used as a disinfecting agent. Here we report a Yttrium Orthosilicate-based up-conversion (visible to UV) nanomaterials. Cationic and anionic polymers are used to form the layer by layer (LBL) coating on surfaces sandwiching the active materials. Another method of inactivation of virus involving oligosaccharide species was also grafted to the polymer layer. Y2SiO5(Pr, Gd) has reduced active viral load from 4*104 to 9.28 (more than 99% decrease in active viral load), and Y2SiO5 (Pr, Gd, Li) has reduced viral load from 4*104 to 0 (100%) in an hour.
10:40 AM
First-principles Study of Substituent Effects on Squaraine Dyes: German Barcenas1; Austin Biaggne1; Bernard Yurke1; William Knowlton1; Lan Li1; 1Boise State University
Dye molecules are critical components for light sensitive applications and can be scaffolded in DNA nanotechnology. Squaraine (SQ) dyes possess favorable properties for light absorbing applications and customization via substitution, making these dyes excellent candidates for excitonic device applications. However, substitutions meant to maximize excitonic energy interactions in SQ aggregates when embedded in DNA scaffolds are not well understood. We performed density functional theory-based methods to reveal substituent effects on SQ dye properties. We found that substituents with larger Hammett constants, quantifying the electron withdrawing and donating strengths of the substituents, have larger transition dipoles and difference static dipoles. We also applied Boltzmann distribution method to determine the population of the substituted dyes in solvent. Our results can guide the synthesis of SQ dyes for excitonic applications. This research was fully supported by the U.S. Department of Energy Established Program to Stimulate Competitive Research Award DE-SC0020089.
11:00 AM
Ceramic Pigments of the Garnet Type Synthesized by Utilization of Rice Husk Ash: Irena Markovska1; Tsvetan Dimitrov2; Fila Yovkova1; 1University "Prof. Dr. Asen Zlatarov ”-Burgas; 2Ruse University Angel Kanchev, Razgrad Branch
The main task of the present work was to synthesize ceramic pigments of the garnet type by utilizing a widespread bio-waste - rice husk. The synthesis of pigments was carried out by a solid state reaction using the following initial materials: CaO, Cr2O3, Fe2O3. White ash from oxidized at 650°C rice husk was used as a source of SiO2. Compositions with pure SiO2 obtained from SiO2.nH2O were also synthesized for comparison. Ceramic pigments were synthesized at 1000 °C and 1100 °C. The properties of the garnet pigments were characterized mainly by X-ray diffraction, hot stage microscopy, FT-IR Spectroscopy, DTA, SEM. The color of the pigments is determined by using the Lovibond Tintometer RT 100 Color - CIELab color measurement. The optimal synthesis parameters were determined. It was established that the pigments synthesized could successfully be used in glazes for wall tiles.