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Browsing MSSI - Materials & Surface Science Institute by Title

Now showing items 33-52 of 70

Gold tip formation on perpendicularly aligned semiconductor nanorod assemblies

O'Sullivan, Catriona; Ahmed, Shafaat; Ryan, Kevin M. (Royal Society of Chemistry, 2008)

A facile spin cast process is used for the instantaneous asymmetric formation of gold tips on perpendicularly aligned CdS nanorod superlattices. Tip size varies as a function of precursor solution concentration and growth ...
High density germanium nanowire growth directly from copper foil by self induced solid seeding

Geaney, Hugh; Dickinson, Calum; Barrett, Christopher A.; Ryan, Kevin M. (American Chemical Society, 2011)

Herein, we describe the growth of highly dense germanium nanowire mats directly on copper foil by a self induced, solid seeded protocol. The existence of Cu3Ge tips on each of the nanowires indicates that growth proceeds ...
Hydroxyapatite-zirconia composites and strontium-hydroxyapatite for skeletal applications

Curran, Declan (University of Limerick, 2010)

Hydroxyapatite (HA) is inherently bioactive and is successfully used in non-load bearing skeletal applications. However, its use in load-bearing applications is limited due to its poor mechanical properties, particularly ...
Identification of rupture locations in patient-specific abdominal aortic aneurysms using experimental and computational techniques

Doyle, Barry J.; Cloonan, Aidan J.; Walsh, Michael T.; Vorp, David A.; McGloughlin, Timothy M. (Elsevier Science, 2010)

In the event of abdominal aortic aneurysm (AAA) rupture, the outcome is often death. This paper aims to experimentally identify the rupture locations of in vitro AAA models and validate these rupture sites using finite ...
Improved assessment and treatment of abdominal aortic aneurysms: the use of 3D reconstructions as a surgical guidance tool in endovascular repair.

Doyle, Barry J.; Grace, Pierce A.; Kavanagh, Eamon G.; Burke, Paul E.; Wallis, Fintan; Walsh, Michael T.; McGloughlin, Timothy M. (Springer, 2009)

BACKGROUND: Endovascular repair is fast becoming the treatment of choice for abdominal aortic aneurysms in anatomically suitable patients. 3D reconstructions not only aid conventional 2D measurements but also allow further ...
Investigation of the solid-state polymorphic transformations of piracetam

Maher, Anthony; Seaton, Colin C; Hudson, Sarah; Croker, Denise M; Rasmuson, Åke C; Hodnett, Benjamin K (American Chemical Society, 2012)

The solid-state polymorphic transformations of 2-oxo-1-pyrrolidine acetamide (Piracetam) were investigated using a combination of off-line and on-line techniques; Differential Scanning Calorimetry (DSC), High Temperature ...
Material characterisation and in vitro biological investigation into acrylic bone cements incorporating multi-walled carbon nanotubes (MWCNTs)

Al-Sharif, Ahmad H. (University of Limerick, 2011)

Acrylic bone cements, based on poly(methylmethacrylate) (PMMA), have been widely used in orthopaedic surgery for the fixation and force distribution of joint prostheses in cemented arthroplasties. However, PMMA continues ...
Measuring the solubility of a quickly transforming metastable polymorph of carbamazepine

O'Mahony, Marcus A; Croker, Denise M; Rasmuson, Åke; Vesler, Stéphane; Hodnett, Benjamin K (American Chemical Society, 2012)

The solubility of the stable FIII polymorph of the pharmaceutical compound carbamazepine was measured by determining its solubility gravimetrically in ethanol and methanol. Where the metastable FI polymorph was suspended ...
Mechanical and microstructural properties of a nickel-titanium alloy at elevated temperatures relevant to the dieless drawing process

Twohig, Eoghan (University of Limerick, 2012)

The traditional process of metallic wire and rod production pulls a wire/rod through a die to reduce its diameter in successive steps. The considerable die wear at the tool-die interface coupled with the additional lubrication ...
Mesoporous solids for low temperature CO2 adsorption

Reimann, Wiebke (University of Limerick, 2012)

Carbon dioxide concentrations in the atmosphere have risen since the onset of the Industrial Revolution. It is a potent green house gas contributing to climate change. One of the biggest carbon dioxide emitters are large ...
Metal surface nucleated supercritical fluid–solid–solid growth of Si and Ge/SiOx core–shell nanowires.

Barrett, Christopher A.; Gunning, Robert D.; Hantschel, Thomas; Arstila, Kai; Ryan, Kevin M. (Royal Society of Chemistry, 2010)

High yields of single-crystalline silicon nanowires and germanium/silicon oxide core-shell nanostructures were synthesized using a supercritical fluid-solid-solid growth mechanism. The formation of the one-dimensional ...
Multicomponent attachment to II-VI nanorods and their hierarchical assembly

O'Sullivan, Catriona (University of Limerick, 2010)

This thesis describes the sequential assembly of various components on to colloidal II-VI semiconductor nanorods. Semiconductor-semiconductor, semiconductor-metal and semiconductor-metal-molecule are attached to the ...
A multi-rate kinetic model for spontaneous oriented attachment of CdS nanorods

Gunning, Robert D.; O'Sullivan, Catriona; Ryan, Kevin M. (Royal Society of Chemistry, 2010)

A multi rate kinetic model to explain the spontaneous oriented attachment of CdS nanorods in the presence of an amine is presented. The model demonstrates the reasons that elongation is restricted to a maximum of quadruple ...
Nanoporous gold electrodes as matrices for enzyme immobilization for application in biosensors and biofuel cells

Salaj-Kośla, Urszula (University of Limerick, 2012)

Robust nanoporous gold electrodes were fabricated by sputtering a gold-silver alloy onto a glass support and subsequent dealloying of the silver component. Alloys were prepared with either a non-uniform or uniform ...
New approaches to abdominal aortic aneurysm rupture risk assessment - engineering insights with clinical gain

McGloughlin, Timothy M.; Doyle, Barry J. (Lippincott Williams & Wilkins, 2010)

Abdominal aortic aneurysm (AAA) rupture remains a significant cause of death in the developed world. Current treatment approaches rely heavily on the size of the aneurysm to decide on the most appropriate time for clinical ...
Particle size distribution reconstruction: the moment surface method

Hutton, Kieran W; Mitchell, Niall A; Frawley, Patrick (Elsevier, 2012)

Numerical simulation of typical chemical engineering processes, such as crystallisation, liquid-liquid extraction, milling and other multi-phase operations in which exist discrete and continuous phases are highly computationally ...
Periodic binary Si:Ti, Si:Al mixed macroporous oxides with ultra-high heteroatom loading: a facile sol-gel approach

Hant, Steven M.; Attard, George S.; Riddle, Rodney; Ryan, Kevin M. (American Chemical Society, 2005)

Highly ordered macroporous mixed metal oxides were prepared with very high mixed metal ratios using an optimized silicon alkoxide prehydrolysis process. The homogenous solutions completely filled the interstitial voids in ...
Perpendicular growth of catalyst-free germanium nanowire arrays.

Barrett, Christopher A.; Geaney, Hugh; Gunning, Robert D.; Laffir, Fathima R.; Ryan, Kevin M. (Royal Society of Chemistry, 2011)

High yields of single-crystalline Ge nanowires (NWs) were synthesized through the thermal decomposition of diphenylgermane (DPG) in the vapor phase of a high boiling point organic solvent. The NWs were single crystal and ...
Pore expansion in mesoporous silicas using supercritical carbon dioxide

Hanrahan, John P.; Copley, Mark P.; Ryan, Kevin M.; Spalding, Trevor R.; Morris, Michael A.; Holmes, Justine D. (American Chemical Society, 2004)

In this paper we report the controlled expansion of pores within mesoporous silicas using supercritical carbon dioxide (sc-CO2). Our method uses the tunable density of sc-CO2 to induce the controlled swelling of the triblock ...
Protein immobilisation on perpendicularly aligned gold tipped nanorod assemblies

O'Sullivan, Catriona; Crilly, Suzanne; Laffir, Fathima R.; Singh, Ajay; Magner, Edmond; Ryan, Kevin M. (Royal Society of Chemistry, 2011)

A multi component assembly consisting of the redox protein cytochrome c (cyt c) immobilised onto vertically aligned gold tipped semiconductor nanorods is described. Cyt c was 10 successfully immobilised using a thiol linker. ...

Now showing items 33-52 of 70

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