Dr Michael Stevens

Associate of the Faculty, School of Chemistry and Forensic Science
MSc (Syd), PhD (Syd)
 

Conference Papers

Nissen, K.E., Baker, A.T., Stevens, M.G. & Stuart, B.H. 2001, 'Long chained multifunctional amines: analysis of binding to PET', 24th Australian Polymer Symposium, Beechworth, February 2001 in 24th Australian Polymer Symposium.

Journal Articles

Stevens, M.G., Lord, B., Proctor, M., Nagy, S.A. & O'riordan, E. 2010, 'Research With Vulnerable Families Caring For Children With Life-Limiting Conditions', Qualitative Health Research, vol. 20, no. 4, pp. 496-505.
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Methodological challenges associated with sensitive research, such as research with vulnerable families, have been well described, but there are few examples of how such challenges have been addressed in specific projects. To help address this gap, we de
Nissen, K.E., Stuart, B.H., Stevens, M.G. & Baker, A.T. 2008, 'The tensile and tear properties of a biodegradable polyester film', International Journal Of Polymer Analysis And Characterization, vol. 13, no. 3, pp. 190-199.
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The tensile and tear properties of a biodegradable polymer, Biomax (R), have been studied in order to assess this material in film applications. While the tensile strength of Biomax (R) was comparable to that of low-density polyethylene, the tear strengt
Nissen, K.E., Stuart, B.H., Stevens, M.G. & Baker, A.T. 2008, 'Characterisation of aminated poly(ethylene terephthalate) surfaces for biomedical applications', Journal of Applied Polymer Science, vol. 107, no. 4, pp. 2394-2403.
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Aminated poly(ethylene terephthalate) (PET) surfaces were charcterised for their use as substrates for the attachment of biologically active molecules. Amines of different chain lengths, tetraethylenementamine, triehtylenetetra-amine (TTETA) and diethylenetriamine (DETA), were investogated. X-ray photoelectron spectroscopy was used to show that each amine introduced a comparable amoun tof nitrogen (5 atoms %) to the PET surface.
Heness, G.L., Stevens, M.G. & Dossett, B. 2007, 'The Effect Of Surface Treatment On Delamination For A Nylon Interleaving Material', Materials forum, vol. 31, pp. 90-95.
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One method of controlling delamination and increasing the inter-lamina toughness in composite laminates is the use of thermoplastic interleaving films, primarily to absorb energy. In this study the effect of controlling the surface energy of a nylon interleaving film on the interlaminar fracture toughness was investigated. It was found that as the surface energy of the nylon increased so did the Mode I delamination resistance. Surface energy was measured via dynamic contact angle measurements and delamination resistance via double cantilever beam specimens. It was concluded that control of the surface energy of the interleaving material is paramount in controlling delamination.
Xu, X., Cortie, M.B. & Stevens, M.G. 2005, 'Effect of glass pre-treatment on the nucleation of semi-transparent gold coatings', Materials Chemistry And Physics, vol. 94, no. 38778, pp. 266-274.
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Coatings of gold nanoparticles with a uniform film texture and a neutral blue hue may be applied to glass by an aqueous process and such coatings have recently been proposed for architectural applications. Here, we show that the optical transmission spec
Xu, X., Stevens, M.G. & Cortie, M.B. 2004, 'In situ precipitation of gold nanoparticles onto glass for potential architectural applications', Chemistry of Materials, vol. 16, no. 1, pp. 2259-2266.
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The optical properties of in situ depositied gold nanoparticle coatings are investigated for potential application in architectural glass. It is found that the optical properties of the coating canbe controlled by the pH of the deposition solution. At a pH of 5.1, the color of the coatings develops from pink, through violet, to blue in transmission. This is due to a plasmon resonance peak at 520 nm from isolated particles, and one at about 700nm due to near-field dipole interactions, with an intermediate zone of the coexistence of the two, which produces the violet color. HOwever, the two peaks do not coexist in the spectra of coatings produced at pH 8.0 or 10.0, with the peak due to the 520nm resonance being swamped by the development of the resonance due to particle-particle interactions. In all cases the 700 nm peak could be broadened and red-shifted by increasing the deposition time. The reasons for these differences are explored and are shown to be attributable to the smalle, more aggregated morphology of nanoparticles precipitated at the higher pHs. The wavelength of maximum plasmon resonance is examined as a function of the volume fraction of nanoparticles. Significant deviations from the wellpknown Genzel-Martin analytical model are observed. The reasons for deviation of themodel are discussed. FInally, it is shown how coatings that are blue or blue-gray in transmission canve obtained by exploiting this deviation. Such coatings may be more suitable for architectural application than the conventional pink-hued coatings obtained with aolloidal gold nanoparticles.
Chong, E.K., Stevens, M.G. & Nissen, K.E. 2003, 'Effect of surface roughness on the adhesion of electrolessly plated platinum to poly(ethylene terephthalate) films', Journal Of Adhesion, vol. 79, no. 7, pp. 667-681.
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Nissen, K.E., Stevens, M.G., Stuart, B.H. & Baker, A.T. 2001, 'Characterisation of PET Films Modified by Tetraethylenepentamine (TTEPA)', Journal of Polymer Science Part B: Poyme Physics, vol. 39, pp. 623-633.
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