IE – Page 2 – TechConnect Briefs

Optimisation of magnetoliposomes for biomedical multi-tasking; potential dual contrast agents and drug delivery vehicles

Meledandri C.J., Brougham D.F., National Institute for Cellular Biotechnology, IE

The relaxivity and particle size of both solid and aqueous-type magnetoliposomes are compared. The effect of magnetic filtration on the particle size and the size distribution is also examined. Our results suggest that magnetic filtration [...]

Denaturation of hen egg white lysozyme in electromagnetic fields: a molecular dynamics study

English N.J., Mooney D.A., University College Dublin, IE

Nonequilibrium molecular dynamics simulations of hen egg white lysozyme have been performed in the canonical ensemble at 298 K in the presence of external electromagnetic fields of varying intensity in the microwave to far-infrared frequency [...]

Fabricating Nanoscale Features Using the 2-Step NERIME TSI Nanolithography Process

Gilmartin S.F., Arshak A., Arshak K., Collins D., Korostynska O., Arshak A., Arshak K., Analog Devices, IE

The 2-step negative resist image by dry etching (2-step NERIME) focused ion beam (FIB) top surface imaging (TSI) process is a novel nanolithography technique for creating nanometer scale resist features using conventional DNQ/novolak resists. The [...]

Infinitely fast reactions in micromixers

Gleeson J.P., University College Cork, Ireland, IE

Efficient mixing to promote chemical reactions is extremely desirable in lab-on-a-chip microfluidic devices, but is difficult to achieve in the typical low Reynolds-number flows. Numerical simulation of the high Peclet-number case common in microfluidics is [...]

Lattice Constant Dependence on Particle Size for Bulk and Doped Ceria prepared from a Citrate Sol-Gel

Morris M.A., Morris V.N., Farrell R.A., Sexton A.M., Morris M.A., Morris V.N., Analog Devices, Dimensional Solids Group, UCC, IE

High surface area ceria nanoparticles have been prepared using a citrate sol-gel precipitation method. Changes to the particle size have been made by calcining the ceria powders at different temperatures, and X-ray methods used to [...]

Cell Separation and Manipulation by magnetic field in the presence of functionalised magnetic nanowires

Prina-Mello A., Diao Z., Coey J.M.D., CRANN Research Laboratory, IE

In this paper we investigate the possibility of using magnetic nanowires in cell separation and manipulation. Ni, Co/Cr and Co/Fe nanowires made by electrochemical deposition in anodic aluminum oxide (AAO) templates. The combination between nanowires [...]

Aspect Ratio Improvement using the 2-step NERIME FIB Top Surface Imaging Process for Nano-lithography Applications

Arshak A., Arshak K., Gilmartin S.F., Collins D., Korostynska O., Arshak A., Arshak K., University of Limerick and Analog Devices, IE

The 2-step NERIME FIB top surface imaging process uses Ga+ ion implantation into resist followed by O2 plasma dry development using reactive ion etching. Previous work has demonstrated this process using 1.5um thick films of [...]

Growth of Carbon Nano-Structures in Ceramic Materials

Kufazvinei C., Leahy R.W., Lipson S.M., Blau W.J., Dillon F.C., Spalding T.R., Morris M.A., Holmes J.D., Allan G., Patterson J., Trinity College Dublin, IE

The investigation aims at growing carbon nanotubes of controlled diameter from inside pores of ceramic materials. The resulting carbon nanotubes will then be used in electrons as thermally conductive substrates in die mountings.

Conductive Films of Ordered High-Density Nanowire Arrays

Kulkarni J.S., Daly B., Ziegler K.J., Crowley T., Erts D., Polyakov B., Morris M.A., Holmes J.D., University College Cork, IE

We have prepared high-density, ordered arrays of semiconductor nanowires within the pores of mesoporous thin films (MTFs) and anodized aluminum oxide (AAO) matrices using a supercritical fluid solution-phase inclusion technique. Conductive atomic force microscopy (C-AFM) [...]

Interaction of Coupled Particles Based on Lennard-Jones and Spring Forces in Brownian Ratchet Devices

Retkute R., Gleeson J.P., University College Cork, IE

Electrophoresis is a technique used to separate polyelectrolyte strands of different lengths. One of its fields of application in nanotechnology is in the separation of DNA. Chains of particles can undergo net transport on a [...]