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Leanne Britcher
University of South Australia
AdsorptionOrganic chemistryInorganic chemistryChemistryPolymer
30Publications
12H-index
1,141Citations
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Publications 29
Newest
#1Leanne BritcherH-Index: 12
#2David C. KehoeH-Index: 5
Last. Janis G. MatisonsH-Index: 22
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Source
#1Kim Shyong Siow (UniSA: University of South Australia)H-Index: 13
#2Leanne Britcher (UniSA: University of South Australia)H-Index: 12
Last. Hans J. Griesser (UniSA: University of South Australia)H-Index: 37
view all 4 authors...
Abstract As some proteins are known to interact with sulfated and phosphated biomolecules such as specific glycosaminoglycans, this study derives from the hypothesis that sulfonate and phosphonate groups on solid polymer surfaces might cause specific interfacial interactions. Such surfaces were prepared by plasma polymerization of heptylamine (HA) and subsequent grafting of sulfonate or phosphonate groups via Michael-type addition of vinylic compounds. Adsorption of the proteins fibrinogen, albu...
4 CitationsSource
#1S Siow KimH-Index: 1
#2Leanne Britcher (UniSA: University of South Australia)H-Index: 12
Last. Hans J. Griesser (UniSA: University of South Australia)H-Index: 37
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In this report, we demonstrate that continuous improvement in XPS instruments and the calibration standards as well as analysis with standard component-fitting procedures can be used to determine the binding energies of compounds containing phosphorus and sulfur of different oxidation states with higher confidence. Based on such improved XPS analyses, the binding energies (BEs) of S2p signals for sulfur of increasing oxidation state are determined to be 166-167.5 eV for S=O in dimethyl sulfoxide...
3 CitationsSource
#1Kim Shyong SiowH-Index: 13
#2Leanne BritcherH-Index: 12
Last. Hans J. GriesserH-Index: 37
view all 4 authors...
2 CitationsSource
#1M. Foundas (UniSA: University of South Australia)H-Index: 1
#2Leanne Britcher (UniSA: University of South Australia)H-Index: 12
Last. Gayle E. Morris (Flinders University)H-Index: 16
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Abstract Two novel methacrylate–phosphonate copolymers were successfully synthesised with varying proportions of methacrylate and phosphonate groups. The dispersant ability of the copolymers was investigated using boehmite colloidal suspensions as a function of pH and polymer concentration. The adsorption and electrochemical behaviour of these methacrylate–phosphonate copolymers onto the boehmite surface was studied as a function of polymer concentration at pH values below and above the IEP of b...
8 CitationsSource
#1Kim Shyong Siow (UniSA: University of South Australia)H-Index: 13
#2Leanne Britcher (UniSA: University of South Australia)H-Index: 12
Last. Hans J. Griesser (UniSA: University of South Australia)H-Index: 37
view all 4 authors...
Phosphate groups are part of biological molecules involved in bio-interfacial phenomena but monomers containing these groups are not volatile enough to be plasma polymerized (pp). Hence monomers with lower oxidation states of P are needed which then does not enable prediction of the oxidation state(s) of P in the pps, nor of possible aging effects. XPS and FTIR analyses of pps from triisopropyl phosphite (TIP) and diethyl phosphite (DEP) reveal the presence of phosphate and polyphosphate groups,...
18 CitationsSource
#1Kristen E. Bremmell (UniSA: University of South Australia)H-Index: 12
#2Leanne Britcher (UniSA: University of South Australia)H-Index: 12
Last. Hans J. Griesser (UniSA: University of South Australia)H-Index: 37
view all 3 authors...
Abstract Addition of ionized terminal groups to PEG graft layers may cause additional interfacial forces to modulate the net interfacial interactions between PEG graft layers and proteins. In this study we investigated the effect of terminal sulfonate groups, characterizing PEG-aldehyde (PEG-CHO) and sulfonated PEG (PEG-SO 3 ) graft layers by XPS and colloid probe AFM interaction force measurements as a function of ionic strength, in order to determine surface forces relevant to protein resistan...
4 CitationsSource
#1Saeed Farrokhpay (UniSA: University of South Australia)H-Index: 16
#2Gayle E. Morris (UniSA: University of South Australia)H-Index: 16
Last. Leanne Britcher (UniSA: University of South Australia)H-Index: 12
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Abstract Polyphosphates are commonly used industrially to provide electrostatic stabilisation to mineral and material suspensions. Polyphosphate solutions however have shown instability under processing conditions such as high temperature and acidic pH which may lead to a reduction in dispersion properties when added to mineral or material suspensions. In this study the influence of pH, temperature and divalent cation concentration pre-treatment on polyphosphate dispersion properties is reported...
6 CitationsSource
#1Kim Shyong Siow (UniSA: University of South Australia)H-Index: 13
#2Leanne Britcher (UniSA: University of South Australia)H-Index: 12
Last. Hans J. Griesser (UniSA: University of South Australia)H-Index: 37
view all 4 authors...
The preparation of thin film coatings with sulfonate and sulfate groups by plasma techniques is not straightforward due to limited volatility of suitable process vapours. We report a combination of plasma polymerisation and plasma treatment, treating heptylamine (HA-SO 2 ) and 1,7-octadiene (OD-SO 2 ) plasma polymers with sulfur dioxide plasma. HA-SO 2 and OD-SO 2 plasma polymer surfaces exhibited different compositions with the latter showing almost twice the amount of sulfur, as well as polysu...
32 CitationsSource
#1Hans J. GriesserH-Index: 37
#2Hardi YsH-Index: 2
Last. Susan J. SempleH-Index: 20
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Researchers at the University of South Australia describe a number of approaches to the fabrication of thin coatings that confer resistance to colonisation by bacteria. These coatings are intended for application onto biomedical devices to prevent device-related infections caused by bacterial biofilms.
2 Citations
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