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Development of 3-dimensional nanostructured unimodal and bimodal polystyrene templates

Gorey, Brian and Newman, Aaron and White, Blánaid and Morrin, Aoife and Smyth, Malcolm R. (2011) Development of 3-dimensional nanostructured unimodal and bimodal polystyrene templates. In: Eirelec 2011, Electrochemistry: The Future?, 16-18 May 2011, Limerick, Ireland.

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Abstract

The aim of this project is to construct a reproducible nanostructured polystyrene (PS) sphere colloid. The polystyrene colloidal crystal must incorporate both macro-sized (μm) and nano-sized (nm) spheres to further advance the potential applications of such templates. However the preparation of bimodal structures with a repeatable macropore-mesopore structure is not a straight forward process. Multiple methods were explored in the construction of unimodal and bimodal colloid crystal templates. Areas of interested such as variation in sphere size, up to two orders of magnitude between macro and nano-sized were investigated, along with determination of the rate at which each PS sphere size packed by capillary forces. Two methods have been singled out sequential deposition and co-deposition. Sequential deposition utilised two separate solutions one containing nano-sized PS spheres, the second macro-sized. During packing the glass chip is transferred between the macro and nano solutions before predetermined times. It was found that while packing sequentially formation of a nano-sized unimodal colloid was preferable. This was due to a faster rate of capillary force packing for the nano-sized PS spheres when compared to the macro-sized. The second method utilised was co-deposition. In this method a solution of both macro and nano-sized PS spheres was homogenised and packed for a period of twelve hours. To date co-deposition has shown the most promise as a reliable method to produce bimodal colloidal crystals

Item Type:Conference or Workshop Item (Poster)
Event Type:Seminar
Refereed:No
Subjects:Physical Sciences > Chemistry
Biological Sciences > Biosensors
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:19856
Deposited On:05 Mar 2014 14:12 by Aoife Morrin. Last Modified 22 Mar 2017 11:59

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