Papers by Charles Sorrell
arXiv (Cornell University), Apr 22, 2021
Rare Metal Materials and Engineering, Sep 1, 2015
Journal of Materials Chemistry B
Degradation behavior of dental composites in oral environments simulating gastroesophageal reflux... more Degradation behavior of dental composites in oral environments simulating gastroesophageal reflux was analysed. Further, thermodynamic and quantitative analyses of the composites uncovered their aqueous stabilities and degradation mechanisms.
CRC Press eBooks, Nov 4, 2022
In cuprate superconductors the presence and concentration of the high oxidation state, Cu3+ or (C... more In cuprate superconductors the presence and concentration of the high oxidation state, Cu3+ or (Cu-O)+, are crucial to and correlate with the superconducting properties, such as transition temperature and critical current density. Likewise the stability of the materials in corrosive environments depends on the oxidation state.
Materials Science and Engineering: C, 2021
Since the permeation of the inflammatory cytokines into hydrogel scaffolds has been shown to caus... more Since the permeation of the inflammatory cytokines into hydrogel scaffolds has been shown to cause dysfunction of encapsulated cells, appropriate design strategies to circumvent this are essential. In the present work, it was hypothesized that highly crosslinked PVA-fucoidan and PVA-carrageenan hydrogels can control permeation of the trefoil-shaped inflammatory cytokine IL-1β while allowing the permeation of the globular protein albumin. PVA, fucoidan, and carrageenans were functionalized with methacrylate groups and the functionalized polymers were co-crosslinked by UV photopolymerization. The resultant hydrogels were characterized physicochemically and the release of fucoidan and carrageenans was quantified by developing a colorimetric assay, which was validated by XPS analysis. The permeability characteristics of the hydrogels were evaluated using bovine serum albumin (BSA), IgG, and IL-1β. The results demonstrated an increase in hydrogel swelling through the incorporation of the polysaccharides with minimal overall mass loss. The release studies showed hydrogel stability, where the formulations exhibited ~43% retention of fucoidan and ~60-80% retention of carrageenans consistently up to 7 days. The permeation data revealed very low permeation of IgG and IL-1β through the hydrogels, with <1% permeation after 24 h, while allowing >6% permeation of BSA. These data indicate that such hydrogels can be used as the basis for cytokine-protective implantable devices for clinical applications.
Materials Chemistry and Physics, 2021
Abstract Glass-ceramics (GCs) based on titanate pyrochlores have attracted recent attention as ca... more Abstract Glass-ceramics (GCs) based on titanate pyrochlores have attracted recent attention as candidate waste forms for actinide immobilization. As zirconate pyrochlore has a superior radiation resistance, it is anticipated that Zr substitution of Ti in titanate pyrochlore GCs would increase their potential for waste form applications. The concept was primarily addressed via the preparation of Gd2Ti2-xZrxO7 (x = 0.1–0.3) GCs to determine the effects of sintering temperature, Zr substitution, and pyrochlore content (50–70 wt%) on the properties of the resultant GCs. XRD and SEM analyses were used to reveal the phase assemblages and microstructures while TEM and Raman spectroscopy were used to analyze the local structures. XRD results confirmed the formation of the targeted pyrochlore as the major phase, with Gd9.33(SiO4)6O2 oxyapatite present as a minor phase. SEM analyses revealed that up to 0.2 formula units of Ti could be substituted by Zr under the processing conditions. The pyrochlore crystallite sizes were largely controlled by the sintering temperature and cooling rate and showed little sensitivity to the glass contents. This work has demonstrated successful substitutions of Ti with Zr in Gd2Ti2O7 GCs as potential waste forms for actinide wastes owing to their superior radiation resistance.
Nano-Structures & Nano-Objects, 2020
Mining, Metallurgy & Exploration, 2003
Inorganic Chemistry, 2019
Carbohydrate Polymers, 2019
ACS Sustainable Chemistry & Engineering, 2019
Materials Chemistry and Physics, 2016
Key Engineering Materials, 1991
Materials Science Forum, 1991
Journal of Superconductivity, 1994
High-quality single crystals are well suited to the investigation of some intrinsic material prop... more High-quality single crystals are well suited to the investigation of some intrinsic material properties. A modified Bridgman method using a sharp temperature gradient (approximately 300 C cm) was used to grow Bi[sub 2]Sr[sub 2]Ca[sub 1]Cu[sub 2]O[sub 8+x] single crystals. Although the samples was contained in alumina ampoules, no aluminium contamination of the samples was detected. Blade-shaped crystals up to [approximately]
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Papers by Charles Sorrell