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Mechanism for etching of exfoliated graphene on substrates by low-energy electron irradiation from helium plasma electron sources

Description: Article investigating the mechanism for etching of exfoliated graphene multilayers on SiO₂ by low-energy (50 eV) electron irradiation using He plasma systems for electron sources.
Date: February 26, 2019
Creator: Femi-Oyetoro, John D.; Yao, Kevin; Tang, Runtian; Ecton, Philip A.; Roccapriore, Kevin M.; Mhlanga, Ashley et al.
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Partner: University of North Texas
open access

Longitudinal Monostatic Acoustic Effective Bulk Modulus and Effective Density Evaluation of Underground Soil Quality: A Numerical Approach

Description: This article introduces a novel method using longitudinal sound to detect underground soil voids to inspect underwater bed property in terms of effective bulk modulus and effective density of the material properties.
Date: December 25, 2020
Creator: Jin, Yuqi; Choi, Tae-Youl & Neogi, Arup
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Partner: University of North Texas
open access

Energy Conversion During Expansion of a Solid-Particle-Entrained Gas

Description: This article describes pneumatic energy being converted into solid particle kinetic energy as a solid-particle-entrained gas that flows downward through a vertical nozzle. For the conditions studied, the solid particles serve as a heat exchange medium to enable a gas expansion that is nearly isothermal. Also, the kinetic energy associated with the two-phase fluid is predominantly that associated with subsonic solid-particle motion. The kinetic energy of the solid particles is converted into oth… more
Date: January 10, 2013
Creator: Ordonez, Carlos A.; Weathers, Duncan L. & Traum, Matthew J.
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Partner: University of North Texas
open access

Thermally Tunable Dynamic and Static Elastic Properties of Hydrogel Due to Volumetric Phase Transition

Description: Article studying the temperature dependence of the mechanical properties of polyvinyl alcohol-based poly n-isopropyl acrylamide (PVA-PNIPAm) hydrogel from the static and dynamic bulk modulus of the material.
Date: June 30, 2020
Creator: Jin, Yuqi; Yang, Teng; Ju, Shuai; Zhang, Haifeng; Choi, Tae-Youl & Neogi, Arup
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Partner: University of North Texas
open access

Novel 2D Dynamic Elasticity Maps for Inspection of Anisotropic Properties in Fused Deposition Modeling Objects

Description: Article introducing a novel ultrasonic non-destructive and non-invasive elastography method demonstrated to evaluate the mechanical properties of fused deposition modeling 3D printed objects using two-dimensional dynamical elasticity mapping. Based on the recently investigated dynamic bulk modulus and effective density imaging technique, an angle-dependent dynamic shear modulus measurement was performed to extract the dynamic Young’s modulus distribution of the FDM structures. The elastographic… more
Date: August 30, 2020
Creator: Jin, Yuqi; Yang, Teng; Heo, Hyeonu; Krokhin, Arkadii A.; Shi, Sheldon; Dahotre, Narendra B. et al.
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Partner: University of North Texas
open access

Single-Step Photochemical Formation of Near-Infrared-Absorbing Gold Nanomosaic within PNIPAm Microgels: Candidates for Photothermal Drug Delivery

Description: Article demonstrating the dynamic potential for tailoring the surface plasmon resonance (SPR), size, and shapes of gold nanoparticles (AuNPs) starting from an Au(I) precursor, chloro(dimethyl sulfide)gold (I) (Au(Me2S)Cl), in lieu of the conventional Au(III) precursor hydrogen tetrachloroaurate (III) hydrate (HAuCl4). This approach presents a one-step method that permits regulation of an Au(I) precursor to form either visible-absorbing gold nanospheres or near-infrared-window (NIRW)-absorbing a… more
Date: June 28, 2020
Creator: Marpu, Sreekar; Kamras, Brian; Nasiri, Nooshin Mirza; Elbjeirami, Oussama; Simmons, Denise Perry; Hu, Zhibing et al.
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Partner: University of North Texas
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