Laser Surface Engineering for Improved Biocompatibility of Orthopedic Biomaterials

Laser Surface Engineering for Improved Biocompatibility of Orthopedic Biomaterials

Date: April 19, 2012
Creator: Dahotre, Sanket; Paital, Sameer & Banerjee, Rajarshi
Description: This poster discusses research on laser surface engineering for improved biocompatibility of orthopedic biomaterials. The current research holds a tremendous promise for production of improved hard tissue implants at affordable cost to a large base patients around the globe in industrialized and under developed countries.
Contributing Partner: UNT Honors College
Templated Growth of Hexagonal Nickel Carbide Nanocrystals on Vertically Aligned Carbon Nanotubes

Templated Growth of Hexagonal Nickel Carbide Nanocrystals on Vertically Aligned Carbon Nanotubes

Date: May 18, 2010
Creator: Hwang, Jun Y.; Singh, Antariksh; Chaudhari, Mrunalkumar; Tiley, Jaimie S.; Zhu, Y. T. (Yuntian T.), 1963-; Du, Jincheng et al.
Description: Article discussing the templated growth of hexagonal nickel carbon nanocrystals on vertically aligned carbon nanotubes.
Contributing Partner: UNT College of Arts and Sciences
Nanoparticle-assisted microwave absorption by single-wall carbon nanotubes

Nanoparticle-assisted microwave absorption by single-wall carbon nanotubes

Date: September 29, 2003
Creator: Wadhawan, Atul; Garrett, David & Pérez, José M.
Description: This article discusses nanoparticle-assisted microwave absorption by single-wall carbon nanotubes.
Contributing Partner: UNT College of Arts and Sciences
Band Structure and Quantum Conductance of Nanostructures from Maximally Localized Wannier Functions: The Case of Functionalized Carbon Nanotubes

Band Structure and Quantum Conductance of Nanostructures from Maximally Localized Wannier Functions: The Case of Functionalized Carbon Nanotubes

Date: August 12, 2005
Creator: Lee, Young-Su; Buongiorno Nardelli, Marco & Marzari, Nicola
Description: Article on band structure and quantum conductance of nanostructures from maximally localized Wannier functions.
Contributing Partner: UNT College of Arts and Sciences
Fullerene Coalescence in Nanopeapods: A Path to Novel Tubular Carbon

Fullerene Coalescence in Nanopeapods: A Path to Novel Tubular Carbon

Date: July 1, 2003
Creator: Hernández, E.; Meunier, Vincent; Smith, B. W.; Rurali, R.; Terrones, Humberto; Buongiorno Nardelli, Marco et al.
Description: Article on fullerene coalescence in nanopeapods, which is responsible for forming stable zeppelinlike carbon molecules.
Contributing Partner: UNT College of Arts and Sciences
UNT Research, Volume 19, 2010

UNT Research, Volume 19, 2010

Date: 2010
Creator: University of North Texas
Description: UNT Research magazine includes articles and notes about research at University of North Texas in various academic fields.
Contributing Partner: University Relations, Communications & Marketing department for UNT
Activation of water on the TiO2 (110) surface: The case of Ti adatoms

Activation of water on the TiO2 (110) surface: The case of Ti adatoms

Date: February 8, 2012
Creator: Miao, Meng; Liu, Yingchun; Wang, Qi; Wu, Tao; Huang, Liping; Gubbins, Keith E. et al.
Description: Article on the activation of water on the TiO2 (110) surface.
Contributing Partner: UNT College of Arts and Sciences
Tribological Improvements of Carbon-Carbon Composites by Infiltration of Atomic Layer Deposited Lubricious Nanostructured Ceramic Oxides

Tribological Improvements of Carbon-Carbon Composites by Infiltration of Atomic Layer Deposited Lubricious Nanostructured Ceramic Oxides

Date: August 2011
Creator: Mohseni, Hamidreza
Description: A number of investigators have reported enhancement in oxidation and wear resistant of carbon-carbon composites (CCC) in the presence of protective coating layers. However, application of a surface and subsurface coating system that can preserve its oxidation and wear resistance along with maintaining lubricity at high temperature remains unsolved. To this end, thermodynamically stable protective oxides (ZnO/Al2O3/ZrO2) have been deposited by atomic layer deposition (ALD) to infiltrate porous CCC and graphite foams in order to improve the thermal stability and wear resistance in low and high speed sliding contacts. Characterization of microstructural evolution was achieved by using energy dispersive x-ray spectroscopy (EDS) mapping in scanning electron microscope (SEM) coupled with focused ion beam (FIB), x-ray tomography, high resolution transmission electron microscopy (HRTEM), scanning transmission electron microscopy (STEM) and X-ray diffraction (XRD). Evaluation of the tribological properties of CCC coated with abovementioned ALD thin films were performed by employing low speed pure sliding tribometer and a high speed/frequency reciprocating rig to simulate the fretting wear behavior at ambient temperature and elevated temperatures of 400°C.It was determined with x-ray tomography imaging and EDS mapping that ALD ZnO/Al2O3/ZrO2 nanolaminates and baseline ZrO2 coatings exhibited excellent conformality and pore-filling capabilities down to ~100 μm ...
Contributing Partner: UNT Libraries
A Wet Etch Release Method for Silicon Microelectromechanical Systems (MEMS) Using Polystyrene Microspheres for Improved Yield

A Wet Etch Release Method for Silicon Microelectromechanical Systems (MEMS) Using Polystyrene Microspheres for Improved Yield

Access: Use of this item is restricted to the UNT Community.
Date: May 2004
Creator: Mantiziba, Fadziso
Description: One of the final steps in fabricating microelectromechanical devices often involves a liquid etch release process. Capillary forces during the liquid evaporation stage after the wet etch process can pull two surfaces together resulting in adhesion of suspended microstructures to the supporting substrate. This release related adhesion can greatly reduce yields. In this report, a wet etch release method that uses polystyrene microspheres in the final rinse liquid is investigated. The polystyrene microspheres act as physical barriers between the substrate and suspended microstructures during the final liquid evaporation phase. A plasma ashing process is utilized to completely remove the polystyrene microspheres from the microstructure surfaces. Using this process, release yields > 90% were achieved. It is found that the surface roughness of gold surfaces increases while that of the silicon is reduced due to a thin oxide that grows on the silicon surface during the plasma process.
Contributing Partner: UNT Libraries
UNT Research, Volume 20, 2011

UNT Research, Volume 20, 2011

Date: 2011
Creator: University of North Texas
Description: UNT Research magazine includes articles and notes about research at University of North Texas in various academic fields.
Contributing Partner: University Relations, Communications & Marketing department for UNT
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