Charles Sorrell

Charles Sorrell
UNSW Sydney | UNSW · School of Materials Science and Engineering

Ph.D. (Ceramic Eng., UNSW, 1987)

About

480
Publications
92,125
Reads
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12,799
Citations
Citations since 2017
114 Research Items
6449 Citations
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201720182019202020212022202302004006008001,0001,200
201720182019202020212022202302004006008001,0001,200
201720182019202020212022202302004006008001,0001,200
Introduction
Specialist in ceramic processing. Active in almost all areas of ceramics except fracture mechanics.
Additional affiliations
January 1987 - March 2020
UNSW Sydney
Position
  • Professor
Description
  • Teacher and researcher
Education
August 1981 - May 1987
University of New South Wales
Field of study
  • Ceramic Engineering
September 1980 - December 1980
University of Missouri-Rolla
Field of study
  • Chemistry
September 1978 - September 1980
Pennsylvania State University
Field of study
  • Ceramic Science

Publications

Publications (480)
Article
Full-text available
The grain size of 3Y-TZP is critical because it must remain below a certain size in order to remain tetragonal during aging in the oral cavity. However, fabrication protocols regularly do not accommodate this critical size factor. Nevertheless, grain size measurements generally are not considered or undertaken. Further, when they are, they are ther...
Article
The time interval between the diagnosis of tumor in a patient and the initiation of treatment plays a key role in determining the survival rates. Consequently, theranostics, which is a combination of diagnosis and treatment, can be expected to improve survival rates. Early detection and immediate treatment initiation are particularly important in t...
Preprint
Full-text available
Producing green hydrogen in a cost-competitive manner via water electrolysis will make the long-held dream of meeting energy needs with hydrogen instead of fossil fuel a reality. Although platinum-based catalysts show good performance towards hydrogen evolution reaction (HER), the high cost and scarce abundance challenge their economic viability fo...
Article
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Hydrogen is a promising fossil-fuel alternative fuel 7 owing to its environmentally neutral emissions and high energy 8 density. However, the need for purified water and external power are 9 critical hindrances to the implementation of hydrogen production. 10 The present work demonstrates the potential to overcome these 11 shortcomings through piez...
Article
Materials derived from metal-organic frameworks (MOFs) have demonstrated exceptional structural variety and complexity and can be synthesized using low-cost scalable methods. Although the inherent instability and low electrical conductivity of MOFs are largely responsible for their low uptake for catalysis and energy storage, a superior alternative...
Article
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Non-union in spinal fusion surgeries (SF) is a key cause of failure. Demineralized bone matrix is used in SFs to facilitate bone growth throughout the segment, and polyglycolic acid (PGA) meshes are used for their containment. A discontinuous calcium mineral coating could transform the function of PGA meshes from passive to active, where dissolved...
Article
Inorganic nanoparticles for drug delivery in cancer treatment offer many potential advantages because they can maximize therapeutic effect through targeting ligands while minimizing off-target side-effects through drug adsorption and infiltration. Although inorganic nanoparticles were introduced as drug carriers, they have emerged as having the cap...
Article
All living organisms utilise reactive oxygen species (ROS) for essential cellular functions, the majority of which involve signal transduction pathways, such as enzyme regulation, cell growth and differentiation signalling, and inflammation mediation. Increased ROS in cancer cells can be caused by abnormalities in the tumor environment. However, us...
Preprint
Hydrogen is a promising fossil-fuel alternative fuel owing to its environmentally neutral emissions and high energy density. However, the need for purified water and external power are critical hindrances to implementation of hydrogen production. The present work reveals the potential to overcome these shortcomings through piezo-photocatalysis of s...
Article
Cerium-based nanoparticles (CeNPs), particularly cerium oxide (CeO2), have been studied extensively for their antioxidant and prooxidant properties. However, their complete redox and enzyme-mimetic mechanisms of therapeutic action at the molecular level remain elusive, constraining their potential for clinical translation. Although the therapeutic...
Article
Eutectic alloys have long been investigated for their unique properties such as single point melting temperature, homogenous structures, and uniform distribution of phases. In this work, we synthesized and characterized two low melting temperature liquid metal alloys. Eutectic alloys of indium-tin-bismuth (Field's metal) and Field's metal-like allo...
Article
The present work delivers an in-depth analysis on contamination and active site blockage of anatase thin films deposited on three types of SiO2-based glass substrates using high-resolution XPS and ICP-MS. Further, the photocatalytic performance of the thin films before and after purification were analysed by UV–Vis spectrophotometry. The results re...
Article
Synthesis methods for different nanoparticulate morphologies are of increasing importance since the morphological features determine the redox performance in many applications. However, the effects of synthesis variables on the formation of these morphologies are not well understood and previous work has been limited to relatively low [Ce] and [NaO...
Article
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Abstract A contiguous carbonate‐rich hydroxyapatite microcoating in a microfluidic device represents a substrate that has chemical and structural similarity to bone mineral. The present work describes a low‐temperature method to deposit a carbonate‐rich hydroxyapatite microcoating on a glass slide and its incorporation within the microchannels of a...
Article
The present work reports a detailed interpretation of the role of Ga and Mn dopants, solid solubility mechanisms, charge compensation mechanisms, intervalence charge transfer, antibacterial performance, and cell attachment and proliferation. Sol‐gel undoped and doped (1, 5, 9 mol%) CeO2 films were spin coated on 3D printed Ti6Al4V biomedical alloy...
Preprint
Full-text available
Ce/Cr codoped TiO2 nanoparticles were synthesized using sol gel and Pechini methods with heat treatment at 400 C for 4 h. A conventional sol gel process produced well-crystallized anatase, while Pechini synthesis yielded less ordered mixed-phase anatase and rutile; this suggests that the latter method enhances Ce solubility and increases chemical h...
Article
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The materials used in the construction industry have a fundamental role in the development and achievement of low-carbon structures. This research aims to develop and characterize innovative and affordable renewable materials that can meet these low carbon requirements for building envelopes and internal element applications. These materials are ge...
Article
Welding of aluminium alloys to steels has been always challengeable. There are a certain number of methods to join these dissimilar metals all have their advantages and disadvantages. Advancement of any aluminium to steel welding strategies is an approach to control the size and nature of the intermetallic compound layer. A new method of electro sp...
Article
Glasses with the general compositions xNd 2O3.20Al2O3.(80–x)SiO2 and 15Nd2O3.yAl2O3.(85–y)SiO2 (x = 10, 15, 20, and y = 20, 25, 30) were prepared by melting at 1550°C. The glasses also contained varying amounts of TiO2 as nucleating agent. The microstructural evolution of the undoped and TiO2-containing glass-ceramics was then studied. Crystallizat...
Article
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Metal oxide pseudocapacitors are limited by low electrical and ionic conductivities. The present work integrates defect engineering and architectural design to exhibit, for the first time, intercalation pseudocapacitance in CeO2-x. An engineered chronoamperometric electrochemical deposition is used to synthesize 2D CeO2-x nanoflakes as thin as ∼12...
Article
CeO2 films doped with 0–9 mol% Ga/Mn were fabricated by spin coating on 3D-printed Ti6Al4V, calcined at 650 °C for 2 h, and characterised by TEM, FESEM, 3D laser scanning confocal microscopy, GAXRD, and XPS. The results depend on the roles of several factors: (1) Sol-gel precursor viscosity affected pore filling and surface coverage. (2) Lattice co...
Article
Full-text available
Nanomaterials with cancer‐imaging and therapeutic properties have emerged as the principal focus of nanotheranostics. The past decade has experienced a significant increase in research in the design, formulation, and preclinical and clinical trials of theranostic nanosystems. However, current theranostic nanoformulations have yet to be approved by...
Article
Although the intrinsic properties of biocatalytic nanomaterials have led to their increasing importance for biomedical applications, their applicability has been hindered by the disadvantages of (1) environmentally deleterious synthesis procedures, (2) non-biocompatibility of conventional surface functionalising agents, (3) lack of stealth properti...
Article
Bismuth-based metal oxide compounds are promising candidates as novel photocatalysts for environmental remediation. However, their low quantum efficiencies and rapid electron-hole recombination times have hindered their uptake for photocatalytic applications. The present work reports an investigation of the effects of variable Bi/Ti ratio during hy...
Article
Oxide perovskites have emerged as an important class of materials with important applications in many technological areas, particularly thermocatalysis, electrocatalysis, photocatalysis, and energy storage. However, their implementation faces numerous challenges that are familiar to the chemist and materials scientist. The present work surveys the...
Article
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Critical catalysis studies often lack elucidation of the mechanistic role of defect equilibria in solid solubility and charge compensation. This approach is applied to interpret the physicochemical properties and catalytic performance of a free-standing 2D–3D CeO2−x scaffold, which is comprised of holey 2D nanosheets, and its heterojunctions with M...
Article
Full-text available
Orthopaedic Implant Coatings In article number 2100333, Florence H.Y. Lui, Charles C. Sorrell, and co-workers describe a dynamic mineralization method to encapsulate polyether-ether-ketone with carbonate-apatite for osseointegration. The nature-inspired process is simultaneously low-temperature, rapid, and multidirectional, indicating suitability w...
Article
Hypothesis The air-solution interface of supersaturated calcium hydrogen carbonate (Ca(HCO3)2) represents the highest saturation state due to evaporation/CO2-degassing, where calcite crystals are expected to nucleate and grow along the interface. Hence, it should be possible to form a free-standing mineral-only calcium carbonate (CaCO3) microfilm a...
Article
Polyether-ether-ketone (PEEK) is one of the key materials used to fabricate intervertebral spacers due to its mechanical similarity to bone and non-interference with imaging. However, its surface chemistry limits osseointegration, while its chemical unreactivity and low glass transition/melting temperature poses technical challenges to the applicat...
Article
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 prim...
Article
The lead-free piezoelectric material sodium bismuth titanate (NBT, Na0.5Bi0.5TiO3) has attracted considerable attention owing to its promising dielectric, piezoelectric, and electrical properties. However, the literature on the binary subsystems is contradictory and there are only limited data for the ternary system. The present work surveys all of...
Preprint
There is considerable interest in the pH-dependent, switchable, biocatalytic properties of cerium oxide (CeO2) nanoparticles (CeNPs) in biomedicine, where these materials exhibit beneficial antioxidant activity against reactive oxygen species (ROS) at basic physiological pH but cytotoxic prooxidant activity in acidic cancer cell pH microenvironment...
Preprint
There is considerable interest in the pH-dependent switchable biocatalytic properties of cerium oxide nanoparticles (CeNPs) in biomedicine, where these materials exhibit beneficial antioxidant activity against reactive oxygen species at neutral and basic physiological pH but cytotoxic prooxidant activity at acidic pathological pH. Oxygen vacancies...
Article
The architectural design of nanocatalysts plays a critical role in the achievement of high densities of active sites but current technologies are hindered by process complexity and limited scaleability. The present work introduces a rapid, flexible, and template-free method to synthesize three-dimensional (3D), mesoporous, CeO2-x nanostructures com...
Article
The mechanistic effects of long-term γ irradiation on the mineralogical, microstructural, structural, physical, and chemical properties of 40 wt% blast furnace slag + 60 wt% fly ash geopolymer pastes have been examined. Ambient curing for 28 days during normal equilibration was followed by exposure to ⁶⁰Co irradiation (1574, 4822, 10,214 kGy). The...
Article
Full-text available
Of the utmost importance of chirality in organic compounds and drugs, the present work reports structure-chirality relationship of three steroidal quinoxalines, which were synthesised by condensing diaminobenzenes with cholestenone. All the compounds were purified and characterised by varying analytical tools prior to their chiroptical analysis by...
Article
Uniformly codoped anatase TiO2 thin films of varying (equal) Mo and Cr concentrations (≤1.00 mol% for each dopant) were fabricated using sol-gel spin coating and deposited on fused silica substrates. All films were annealed at 450 °C for 2 h to recrystallise anatase. Undoped anatase films have been subjected to dual ion implantation for the first t...
Article
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The major downsides of cement manufacturing are the high CO2 emissions and high energy usage. Geopolymers, which are fabricated by activation of blends of fly ash (FA) and ground granulated blast furnace slag (GGBFS) using an alkaline activator, offer a promising solution to this issue. However, to enhance the replacement of cement in construction...
Article
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Fly ash is an aluminosilicate and the major by-product from coal combustion in power stations; its increasing volumes are major economic and environmental concerns, particularly since it is one of the largest mineral resources based on current estimates. Mullite (3Al2O3·2SiO2) is the only stable phase in the Al2O3-SiO2 system and is used in numerou...
Article
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The present work analyses the effects of curing temperature (25°, 40°, 60 °C for 24 h), silicate modulus Ms value (1.5, 1.7, 2.0), and slag content (10, 20, 30, 40 wt%) on the compressive strength development (1, 7, 14, 28 days) of low-alkali geopolymer mortars with matrices from fly ash and blast furnace slag. These data were used to generate pred...
Article
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Removal of rare earth elements (REEs) from industrial wastewater is a continual challenge. To date, several approaches to the synthesis of nanoadsorbants for this application have been reported, although these are characterized by insufficient adsorption capacity and limitations in cycling stability. The present work reports the fabrication and per...
Preprint
It has been demonstrated in previous experimental and computational work that doping CeO2 with transition metals is an effective way of tuning its properties. However, each previous study on CeO2 doping has been limited to a single or a few dopants. In this paper, we systematically study the formation energies, structural stability and electronic p...
Article
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The present work applies a focal point of materials-related issues to review the major case studies of electron transport layers (ETLs) of metal halide perovskite solar cells (PSCs) that contain graphene-based materials (GBMs), including graphene (GR), graphene oxide (GO), reduced graphene oxide (RGO), and graphene quantum dots (GQDs). The coverage...
Article
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...
Article
Full-text available
The effects of curing temperature, blast furnace slag content, and Ms on the initial and final setting times, and compressive strengths of geopolymer paste and mortars are examined. The present work demonstrates that ambient-cured geopolymer pastes and mortars can be fabricated without requiring high alkalinity activators or thermal curing, provide...
Article
The application of nanoparticulate therapies for cancer depends largely on the uptake and redox activity of the particles. The present work reports the fabrication of different morphologies of nanoceria (CeO2−x) as nanooctahedra (NO), nanorods (NR), and nanocubes (NC) by hydrothermal synthesis at different temperatures (100 °C, 180 °C) of solutions...
Article
The morphologies of ceria nanocrystals play an essential role in determining their redox and catalytic performances in many applications, yet the effects of synthesis variables on the formation of ceria nanoparticles of different morphologies and their related growth mechanisms have not been systematised. The design of these morphologies is underpi...
Article
V-doped, Mo-doped, and codoped anatase powders have been fabricated by hydrothermal synthesis at 150 ◦C for 20 h, followed by calcining at 500 ◦C for 4 h in air. The raw materials were titanium tetraisopropoxide, VCl3, and MoCl5 and the doping levels were in the relatively low range of 0.02–0.08 mol% (metal basis). The samples were characterized by...
Article
TiO2 coatings were fabricated by anodization of Ti6Al4V in 1 M H3PO4 or H2SO4, at room temperature at 120 V for 10 min, and followed by annealing at 300° or 500 °C for 8 h. Analyses include mineralogy (GAXRD, Raman), chemistry (XPS), morphology and microstructure (FESEM, FIB, 3D confocal microscopy), thermodynamic, optical (UV–Vis), and photocataly...
Article
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Increasing demands in minimization of fire risks and meeting fire safety requirements by polymers require advances in knowledge of flame-retardant materials suitable for use in fire-retardancy applications. The present work represents the seminal review of alginate/polymer-based materials as flame retardants. Alginates are suitable for this applica...
Article
Thin films of anatase codoped with 0.01 mol% Co and 0.01 mol% Mo up to 5.00 mol% Co and 5.00 mol% Mo were fabricated by spin coating on soda-lime-silica glass substrates. The films subsequently were calcined in air at 450 °C for 2 h. The mineralogical, chemical, morphological, topographical, optical, and photocatalytic properties of the films were...
Article
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Anatase thin films spin coated on soda–lime–silica (SLS) glass and unpolished (001) rutile were annealed at 200–550 °C for 8 h, followed by GAXRD, Raman, XPS, SIMS, AFM, TEM, UV–Vis, ellipsometry, and MB dye degradation. Films on SLS substrates annealed at 200–350 °C were amorphous but those annealed at 450°–550 °C consisted of anatase; the rutile...
Article
TiO2 coatings were fabricated by anodizing unpolished and polished Ti6Al4V substrates in 1–3 M H2SO4 for 10 and 20 min at 120 V. Anatase was the principal polymorph and oxygen dissolution in the Ti6Al4V substrates caused αTi lattice contraction. Dielectric breakdown and associated heating of the insulating TiO2 promoted trace rutile formation. The...
Article
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Precise control over the morphology of nanomaterials is critical yet challenging. Here, we report an efficient approach to tailor the architecture of nanostructures. The process involves rapid disassembly/reassembly of an unstable metal-based coordination polymer (MCP) by controlling the kinetics of the reassembly process. The synthesis procedure d...
Article
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The present work reports data for TiO2 thin films on borosilicate glass and (001) single-crystal TiO2, annealed at 200–550 °C for 8 h. Characterization included GAXRD, laser Raman microspectroscopy, AFM, UV–Vis, XPS, SIMS, TEM, ellipsometry, and methylene blue (MB) dye degradation. The substrate determined the TiO2 polymorph that formed, while the...
Article
Photocatalytic materials are pivotal for the implementation of disruptive clean energy applications such as conversion of H2O and CO2 into fuels and chemicals driven by solar energy. However, efficient and cost-effective materials able to catalyze the chemical reactions of interest when exposed to visible light are scarce due to the stringent elect...
Article
Electrocatalytic activities of electrodes for water splitting generally are assessed in terms of current density normalisation on the basis of geometric area. However, this approach does not involve the effects of surface microstructure which often is rough. The present work examines this disagreement through the electrochemical characterisation of...
Article
The present work reports a detailed mechanistic interpretation of the role of the solubility of dopants and resultant midgap defect energies in band gap engineering. While there is a general...
Article
Facet engineering is a new method of materials design with considerable potential for many technological applications. The present work uses DFT calculations to understand how this strategy can be used to accelerate the silanization of tetraethyl orthosilicate (TEOS) on the surface of ceria (CeO2), which is a key technology in biomedical and other...
Article
Full-text available
Holey 2D metal oxides have shown great promise as functional materials for energy storage and catalysts. Despite impressive performance, their processing is challenged by the requirement of templates plus capping agents or high temperatures; these materials also exhibit excessive thicknesses and low yields. The present work reports a metal‐based co...
Article
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In article number 1905288, Sajjad S. Mofarah, Esmaeil Adabifiroozjaei, Pramod Koshy, and co‐workers present a versatile metal‐based coordination strategy to fabricate stratified structures. These structures are readily exfoliated into ultrathin holey nanosheets of metal oxides. The holey architecture of the nanosheets minimizes the diffusion distan...
Article
CeO2, TiO2, and CeO2–TiO2 layered thin films of different compositions were deposited on polished fused silica glass substrates using spin coating and then annealed at 550 °C for 1 h. Poorly crystalline fluorite-type CeO2 and anatase-type TiO2 were the only phases detected. The valence effects for Ce are attributed to intervalence charge transfer (...