Stuart Thickett

Stuart Thickett
University of Tasmania · School of Chemistry

BSc, PhD, GCULT

About

76
Publications
13,483
Reads
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2,344
Citations
Citations since 2017
39 Research Items
1602 Citations
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
Additional affiliations
January 2017 - present
University of Tasmania
Position
  • Professor (Associate)
February 2015 - December 2016
University of Tasmania
Position
  • Lecturer
February 2012 - February 2015
UNSW Sydney
Position
  • Vice-Chancellor's Post-Doctoral Research Fellow

Publications

Publications (76)
Article
Polymer monoliths are an alternative to traditional particle-packed supports used in solid-phase extraction because of their ease of preparation, high porosity, and pH stability. They often required the attachment of monoliths to a support, such as the internal walls of a column to enable their use for sample preparation. Applications of free-stand...
Article
A new 3D printable resin formulation is developed and optimized from commercially available thiol (pentaerythritol tetrakis(3‐mercaptopropionate); PETMP) and alkyne (3‐butyn‐1‐ol; BA) monomers. Printed objects are characterized by Fourier‐transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA). The extraction efficiency of the p...
Article
Stable organic radicals have an open shell structure that makes them suitable for use in a diverse set of applications. Specifically, it is the reversible one-electron redox behaviour that makes these species suitable for energy storage and in molecular electronics. Maintaining chemical stability, low redox potential and charge transfer capabilitie...
Article
Graphene features an array of extraordinary mechanical, physical and electrical properties, and it is of great interest to impart such properties to polymeric materials by use of graphene and its derivatives as filler materials. The focus of this comprehensive review is on the preparation of graphene-based polymeric nanocomposite materials by use o...
Article
Full-text available
Investigation of highly oxidized graphene oxide (GO) by solid-state nuclear magnetic resonance (NMR) spectroscopy has revealed an exceptional level of hitherto undiscovered structural complexity. A number of chemical moieties were observed for the first time, such as terminal esters, furanic carbons, phenolic carbons, and three distinct aromatic an...
Article
Full-text available
Deep eutectic solvents (DESs) represent an emergent class of green designer solvents that find numerous applications in different aspects of chemical synthesis. A particularly appealing aspect of DES systems is their simplicity of preparation, combined with inexpensive, readily available starting materials to yield solvents with appealing propertie...
Article
We report the preparation of thermoresponsive poly(N-isopropylacrylamide) (polyNIPAM) hydrogels via the free radical polymerization of deep eutectic monomer solvents (DEMs) for the first time, where NIPAM serves as a polymerizable hydrogen bond donor. DEMs were prepared by a simple heating and stirring protocol using NIPAM and either choline chlori...
Article
Full-text available
A dual wavelength photopolymerisation process is presented allowing for the volumetric fabrication of complex geometries using a multistep process. The methacrylate-based resin contained 0.1 wt% Camphorquinone /0.1 wt% Ethyl 4-(dimethylamino) benzoate and 0.2 wt% bis[2-(ochlorophenyl)-4,5-diphenylimidazole] as photoinitiators (473 nm) and photoinhi...
Article
Emulsions are mixtures of two immiscible liquids in which droplets of one are dispersed in a continuous phase of the other. The most common emulsions are oil-water systems, which have found widespread use across a number of industries, for example in the cosmetic and food industries, and are also of advanced scientific interest. In addition, the pa...
Article
Full-text available
Poly(d,l–lactide–co–glycolide) (PLGA) has been extensively explored for bone regeneration applications; however, its clinical use is limited by low osteointegration. Therefore, approaches that incorporate osteoconductive molecules are of great interest. Graphene oxide (GO) is gaining popularity for biomedical applications due to its ability to bind...
Article
Nanoparticles (NPs) undergo a number of changes in environmental systems which are often influenced by their interaction with Natural Organic Matter (NOM). However, despite their importance and prevalence, these interactions are still not fully understood. To better understand the interaction between NOM and NPs, an Affinity Capillary Electrophores...
Article
The occurrence of covalent grafting of polymer chains onto graphene oxide (GO) sheets during aqueous miniemulsion radical polymerizations of common vinyl monomers has been investigated. Styrene, benzyl methacrylate and t-butyl methacrylate were polymerized via miniemulsion polymerization using GO as sole surfactant, and the characterization of GO i...
Article
The design and synthesis of composite nanoparticles consisting of a polymeric phase and an inorganic/organic phase has enjoyed a period of extensive development in recent times due to numerous advances in heterogeneous polymerization. In this review, we look at several key advances that have shaped this field in the past deacde. Specifically, advan...
Article
Full-text available
We have developed a facile and industrially scalable method to synthesize colloidally stable polymer nanoparticles decorated with graphene oxide (GO) sheets via miniemulsion polymerization, which in turn enables the preparation...
Article
The use of amphiphilic triblock copolymers bearing a reactive alkoxysilane middle block as polymeric stabilizers is reported in this work. A series of poly(ethylene glycol) methyl ether methacrylate‐b‐(3‐trimethoxysilyl)propyl methacrylate‐b‐benzyl methacrylate (PEGMA‐b‐MPS‐b‐BzMA) triblock copolymers were prepared by RAFT solution polymerization a...
Article
Polystyrene/graphene oxide (PSt/GO) nanocomposite latexes have been prepared by Pickering miniemulsion polymerization in the presence of the conventional surfactant sodium dodecyl sulfate (SDS) in order to investigate its influence on the polymerization mechanism. Miniemulsion polymerization of styrene can be conducted successfully using GO as sole...
Article
Copolymer/water interfacial tensions of statistical copolymers of styrene / n-butyl acrylate were estimated by pendant drop tensiometry using an “inverse” configuration according to which a drop of water was formed in toluene/copolymer solutions. The study first involved the precise measurement of copolymer solutions density using pycnometry. Subse...
Article
In chemistry curricula, both the role of the laboratory program and the method of assessment used are subject to scrutiny and debate. The ability to identify clearly defined competencies for the chemistry laboratory program is crucial, given the numerous other disciplines that rely on foundation-level chemistry knowledge and practical skills. In th...
Article
Full-text available
Polymerized High Internal Phase Emulsions (PolyHIPEs) were prepared using emulsion-templating, stabilized by an amphiphilic diblock copolymer prepared by reversible addition fragmentation chain transfer (RAFT) polymerization. The diblock copolymer consisted of a hydrophilic poly(ethylene glycol) methyl ether acrylate (PEO MA, average Mn 480) segmen...
Article
A series of polymerized high internal phase emulsion (polyHIPE) materials have been prepared by using a water in oil emulsion stabilized by a macro-RAFT agent acting as a polymeric surfactant, 2-(butylthiocarbonothioylthio)-2-poly(styrene)-b-poly(acrylic acid). The pore structure of formed polyHIPEs were closed. By removing the RAFT-end group of th...
Article
Polymerization-induced self-assembly (PISA) has become the preferred method of preparing self-assembled nano-objects based on amphiphilic block copolymers. The PISA methodology has also been extended to the realization of colloidal nanocomposites, such as polymer–silica hybrid particles. In this work, we compare two methods to prepare nanoparticles...
Article
An approach for the fabrication of functional polymer surface coatings is introduced, where micro-scale structure and surface functionality are obtained by means of self-assembly mechanisms. We illustrate two main applications of micro-patterned polymer surfaces obtained through dewetting of bilayers of thin polymer films. By tuning the physical an...
Article
The synthesis of composite latex particles possessing core-shell and gradient morphologies, respectively, using seeded starve-fed semibatch emulsion polymerization of styrene (St) and methyl methacrylate (MMA) is presented. The focus is on the effect of the monomer feed order on the particle morphology development. The particle morphology is assess...
Article
A convenient and industrially scalable method for synthesis of homogeneous nanocomposite films comprising poly(styrene-stat-butyl acrylate) and nanodimensional graphene oxide (GO) or reduced GO (rGO) is presented. Importantly, the nanocomposite latex undergoes film formation at ambient temperature, thus alleviating any need for high temperature or...
Article
The field of polymer chemistry is currently experiencing major research efforts into development of novel techniques for synthesis of polymers with well-controlled microstructure. Recently, a new method has been reported [McHale et al., Nat. Chem. 2012, 4, 491–497] whereby high molecular weight and low dispersity polymer can be obtained by a radica...
Article
Incorporation of both metal nanoparticles and a polymer layer is proposed to benefit charge transport in a semiconductor in the absence of electron and hole scavengers. Therefore in this work, zinc oxide is deposited with platinum metal and a layer of polymeric species via a photocatalytic route: platinum cation photoreduction and phenol photooxida...
Article
The preparation of polymer-silica hybrid nanoparticles of various morphologies is reported. As a first step, polymer nanoparticles were synthesized using an alkoxysilane-functional methacrylic macroRAFT agent. Two different alkoxysilane-containing monomers, 3-(trimethoxysilyl)propyl methacrylate and 3-(triisopropoxysilyl)propyl methacrylate, were u...
Article
Polymeric nanoparticles containing reduced graphene oxide (rGO) nanosheets have been prepared by aqueous miniemulsion radical polymerization of methyl methacrylate (MMA) utilizing poly(ionic liquid) (PIL) as stabilizer to effectively disperse the rGO nanosheets in the monomer phase. The PIL that gave the best results in terms of rGO dispersibility...
Article
The preparation of polymer nanoparticles containing reduced graphene oxide nanosheets (rGO) within their interior has been conducted by radical polymerization in aqueous miniemulsion employing the nonionic surfactant Tween 80. Polymerizations were conducted using the ionic liquid monomer 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)amide...
Article
Oil-in-water (‘inverse’) High Internal Phase Emulsions (HIPEs) have been prepared using an amphiphilic macro-RAFT agent with toluene as the internal dispersed phase (~80 vol%) and an aqueous monomer solution as the continuous phase. The water phase consisted of the monomers acrylamide (AM) and N,N'-methylenebisacrylamide (MBAM), an initiator as wel...
Article
The preparation of polymer thin films or surface coatings that display a static water contact angle >95° often requires hierarchical roughness features or surface functionalization steps. In addition, inherently hydrophobic polymers such as fluoropolymers often possess low glass transition temperatures, reducing their application where thermal stab...
Article
In this communication, we report the successful synthesis of gradient morphology nanoparticles composed of poly(styrene-co-methyl methacrylate) and their characterisation using X-Ray Photoelectron Spectroscopy (XPS). Gradient morphology latexes are of particular interest in the coatings industry as they are formulated with reduced volatile organic...
Article
The functionalisation of nanodiamond is a key step in furthering its application in areas such as surface coatings, drug delivery, bio imaging and other biomedical avenues. Accordingly, analytical methods for the detailed characterisation of functionalised nano-material are of great importance. This work presents an alternative approach for the ele...
Article
Inspired by an example found in nature, the design of patterned surfaces with chemical and topographical contrast for the collection of water from the atmosphere has been of intense interest in recent years. Herein we report the synthesis of such materials via a combination of macromolecular design and polymer thin film dewetting to yield surfaces...
Article
An update to the comprehensive review on controlled/living radical polymerization (CLRP) is discussed. The two most well-known CLRP systems that operate based on the persistent radical effect (PRE) are NMP and ATRP, and both have been studied extensively with regard to compartmentalization. xanthates are suitable as RAFT agents for implementation o...
Article
The ability to control protein and cell positioning on a microscopic scale is crucial in many biomedical applications, such as single cell studies. We have developed and investigated the grafting of poly(ethylene glycol) (PEG) brushes onto poly(D,L-lactide-co-glycolide) (PLGA) thin films, which can be micro-patterned by exploiting their spontaneous...
Article
Miniemulsion polymerization of styrene using AIBN as initiator at 70 degrees C has been performed with nano-dimensional graphene oxide (GO) sheets as surfactant (no conventional surfactants employed) with a view to exploring the effects of pH and ionic strength (NaCl concentration). The pH value of the emulsion exerted a relatively minor influence...
Article
The preparation of hybrid hollow capsules consisting of a cross-linked polymer shell and a coating of graphene oxide (GO) is demonstrated. The capsules are prepared by Pickering miniemulsion polymerization, exploiting the surface activity of GO for its use as a colloidal surfactant. This approach represents a simple and convenient route towards hol...
Article
Based on a recent report [J. Polym. Sci. Part A. Polym. Chem. 2013, 51, 47–58] whereby we demonstrated the synthesis of polystyrene nanoparticles by miniemulsion polymerization stabilized by graphene oxide (GO) nanosheets as sole surfactant, we hereby report the synthesis of hybrid polymer nanoparticles of several members of the (meth)acrylate fami...
Article
Dispersion polymerization of styrene has been performed in CO2-expanded ethanol at ≤9 MPa and 70 °C using PVP as stabilizer. The polymerizations proceeded with good colloidal stability, resulting in spherical particles of diameters of ∼2 μm. Pressurization with CO2 leads to an increase in particle size (∼1 μm in the corresponding CO2-free system),...
Article
In this letter, we report a simple and unexpected method of producing polymer–graphene oxide (GO) composite materials via ab initio emulsion polymerization in water. On the basis of the recent reports concerning the surfactant-like behavior of GO for stabilizing oil-in-water emulsions, we prepared exfoliated GO sheets with lateral dimension approxi...
Article
Graphene oxide (GO) has been long-considered the most convenient route towards the large scale production of graphene. Additionally, the functional groups present within GO permit both covalent and non-covalent chemical functionalization, in particular with polymeric materials. The functionalization of GO therefore enables the development of graphe...
Article
Polystyrene particles “armoured” with nanosized graphene oxide (GO) sheets have been prepared by aqueous miniemulsion polymerization of styrene, exploiting the amphiphilic properties of GO in the absence of conventional surfactants. The nanoscale GO sheets were prepared from graphite nanofibers of diameter approximately 100 nm based on a novel proc...
Article
The ability to control protein and cell positioning on a microscopic scale is crucial in many biomedical applications, such as tissue engineering and the development of biosensors. We demonstrate here that the assembly of collagen on patterned surfaces produced by the dewetting of metastable poly(N-vinylpyrrolidone) (PNVP) films on top of polystyre...
Article
We investigated the early and intermediate stages of the guided dewetting of polystyrene (PS) thin films on chemically patterned silicon, achieved by micro-contact printing of non-wettable self-assembling monolayers of an alkylsilane. Two different types of ordered patterns could be achieved depending on the annealing temperature and time. Study of...
Article
We investigated the dewetting of metastable poly(N-vinylpyrrolidone) (PNVP) thin films (45 nm) on top of polystyrene (PS) thin films (58 nm) as a function of annealing temperature and molecular weight of PS (96 and 6850 kg/mol). We focused on the competition between dewetting, occurring as a result of unfavorable intermolecular interactions at the...
Article
The synthesis of biomimetic, micro-patterned surface coatings with topographical and chemical features to capture water from a humid atmosphere is demonstrated. The coatings are prepared by dewetting thin polymer films to create materials consisting of raised hydrophilic bumps on a hydrophobic background. An enhanced rate of water condensation is m...
Article
Lanthanide-encoded polystyrene particles synthesized by dispersion polymerization are excellent candidates for mass cytometry based immunoassays, however they have previously lacked the ability to conjugate biomolecules to the particle surface. We present here three approaches to post-functionalize these particles, enabling the covalent attachment...
Article
We investigated the morphology and dynamics of the dewetting of metastable poly(4-vinylpyridine) (P4VP) thin films situated on top of polystyrene (PS) thin films as a function of the molecular weight and thickness of both films. We focused on the competition between the dewetting process, occurring as a result of unfavorable intermolecular interact...
Article
Full-text available
We examine the suitability of metal-containing polystyrene beads for the calibration of a mass cytometer instrument, a single particle analyser based on an inductively coupled plasma ion source and a time of flight mass spectrometer. These metal-containing beads are also verified for their use as internal standards for this instrument. These beads...
Article
Full-text available
We present the synthesis and characterization of monodisperse, sub-micron poly(styrene) (PS) particles loaded with up to and including 10(7) lanthanide (Ln) ions per particle. These particles have been synthesized by seeded emulsion polymerization with a mixture of monomer and a pre-formed Ln complex, and analyzed on a particle-by-particle basis by...
Article
We describe the synthesis and characterization of metal-encoded polystyrene microspheres by multiple-stage dispersion polymerization with diameters on the order of 2 mum and a very narrow size distribution. Different lanthanides were loaded into these microspheres through the addition of a mixture of lanthanide salts (LnCl(3)) and excess acrylic ac...
Article
The study was conducted to examine a mechanism of chain transfer to monomer in styrene free-radicals. It was suggested that chain transfer take place through hydrogen-atom abstraction form the Diels-Alder (DA) dimer of styrene, which possesses a labile hydrogen atom. The radical formed through this reaction was highly stabilized. The DA mechanism f...
Article
It has been found [Thickett, S. C.; Gaborieau, M.; Gilbert, R. G. Macromolecules 2007, 40, 4710-4720] that rate and characterization data on the seeded growth of latex particles electrosterically stabilized by a "hairy layer" of anchored poly(acrylic acid) (pAA) can be qualitatively and quantitatively explained by mechanistic events involving mid-c...
Article
Full-text available
Over decades of carefully designed kinetic experiments and the development of complementary theory, a more or less complete picture of the mechanisms that govern emulsion polymerization systems has been established. This required means of determining the rate coefficients for the individual processes as functions of controllable variables such as i...
Article
Polymeric (steric and electrosteric) stabilizers, based on water-soluble polymers such as poly(acrylic acid) and poly(ethylene oxide), are widely used to make surface coatings by emulsion polymerization and form a “hairy layer” which provides colloidal stability to the latex particles. It is shown by a combination of NMR and rate studies that the g...
Article
The kinetics and mechanism for the process of radicals entering latex particles from the aqueous phase ("radical entry") in electrosterically stabilized emulsion polymerization particles were studied. Polystyrene particles stabilized with differing lengths of poly(acrylic acid) chains bound to the surface were synthesized using RAFT-controlled radi...
Article
The mechanism controlling radical loss by exit (desorption) in electrosterically stabilized emulsion polymerization particles was obtained from kinetic studies. Using RAFT-controlled radical polymerization techniques, polystyrene particles stabilized with differing lengths of poly(acrylic acid) chains bound to the surface were synthesized, with the...
Article
The long chain branching (LCB) in poly(butyl acrylic) (polyBA) systems in the presence of styrene monomer was investigated. Styrene was chose because it does not branch and its emulsion polymerization kinetics are well understood. The radical entry efficiency values were calculated using rate coefficients p and k. The transfer to polyBA was found t...
Article
The free-radical polymerization propagation rate coefficient (k(p)) of acrylic acid (AA) was calculated using transition state theory and ab initio quantum chemistry in order to shed light on the very strong solvent effects observed experimentally. Calculations were performed using a gas-phase reaction simulation, and the contribution of solvent th...

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Projects (5)
Project
Prepare graphene-based nanocomposites using in situ waterborne polymerization technology. Achieve high end composite materials showing electrical and thermal conductivity with high mechanical strength.