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Purpose. The sensitivity of two techniques in tracking changes in the surface energetics was investigated for a crystalline excipient sample, D-mannitol. Methods. Surface energy distribution was measured by inverse gas chromatography (IGC) using a combination of alkanes and ethanol at finite concentrations. Facet specific surface energy was measured by(More)
ToF-SIMS has been used in the analysis of latent fingerprints (dactyloscopy) with a view to use in forensic and biomedical applications. Szynkowska et al have demonstrated that SIMS can be employed to produce images of whole fingerprints on inorganic surfaces such as steel, brass and glass (1). We demonstrate the detection of a range of exogenous materials(More)
This study focuses on the fabrication of poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) thin films by ink jet printing and investigates the developed surface morphology and electrical conductivity of the printed films as a function of the concentration of dimethyl sulfoxide (DMSO), added as conduction enhancing co-solvent, and Surfynol,(More)
This paper investigates electrochemical double layer capacitors (EDLCs) including two alternative types of carbon-based fibrous electrodes, a carbon fibre woven fabric (CWF) and a multiwall carbon nanotube (CNT) electrode, as well as hybrid CWF-CNT electrodes. Two types of separator membranes were also considered. An organic gel electrolyte PEO-LiCIO(More)
A complex poly(vinylidene difluoride) (PVdF)/poly(methyl methacrylate) (PMMA) based coil coating formulation has been investigated using time-of-flight SIMS (ToF-SIMS). Employing a Bi 3 + analysis source and a Buckminsterfullerene (C 60) sputter source, depth profiles were obtained through the polymeric materials in the outer few nanometres of the PVdF(More)
High quality single crystal silicon-germanium-on-insulator has the potential to facilitate the next generation of photonic and electronic devices. Using a rapid melt growth technique we engineer tailored single crystal silicon-germanium-on-insulator structures with near constant composition over large areas. The proposed structures avoid the problem of(More)
The ultra-low-angle microtomy (ULAM) technique has been developed to impart a cross-sectional, ultra-low-angle taper through polymeric materials such as coatings and paints. ULAM employs a conventional rotary microtome in combination with high-precision, angled sectioning blocks to fabricate the ultra-low-angle tapers. Subsequent investigation of the tapers(More)
Model samples of the interface of an adhesive joint containing small levels of aminopropyl triethoxysilane (APS) have been prepared in order to examine the interface formed with an aluminium substrate. X-ray photoelectron (XPS) and time of flight secondary ion mass spectrometry (ToF-SIMS) has been used to analyse and image the interface region in between(More)
The interfacial region of a model, multilayer coating system on an aluminium substrate has been investigated by high resolution time-of-flight secondary ion mass spectrometry (ToF-SIMS). Employing ultra-low-angle microtomy (ULAM), the interface between a poly(vinylidene difluoride) (PVdF) based topcoat and a poly(urethane) (PU) based primer 'buried' over(More)
The effects of flame treatment on the surface characteristics of four injection moulded, automotive grade, polypropylene samples, pigmented with carbon black, have been studied. The changes in wettability have been monitored by water contact angle and Dyne inks, whilst XPS has been used to establish the changes in oxygen surface concentration as a function(More)