Sensing at nanostructures for agri-food and enviromental applications

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dc.contributor.advisor O'Riordan, Alan en
dc.contributor.author Creedon, Niamh
dc.date.accessioned 2018-10-17T11:22:12Z
dc.date.available 2018-10-17T11:22:12Z
dc.date.issued 2018
dc.date.submitted 2018
dc.identifier.citation Creedon, N. 2018. Sensing at nanostructures for agri-food and enviromental applications. PhD Thesis, University College Cork. en
dc.identifier.endpage 278 en
dc.identifier.uri http://hdl.handle.net/10468/7014
dc.description.abstract With a predicted population increase of 2.3 billion people, by 2050, agricultural productivity must be vastly improved and made sustainable. Globally, agriculture must deliver a 60% increase in food production to cope with the population demand. Moreover, this needs to be achieved against a changing climate, an exploitation of natural resources, and growing water and land scarcities. New digital technologies can optimise production efficiency and ensure food security and safety while also minimising waste within the production systems and the supply chain. To this end, new sensor technologies are being developed for applications in animal health diagnostics and environmental issues related to the global population, such as food & crop protection, pathogen and toxin detection, and environmental remediation. In this thesis, two new nanosensing diagnostic devices are developed and presented; surface enhanced Raman sensing and electrochemical sensing. Surface-enhanced Raman spectroscopy (SERS) substrates were fabricated by templating a flexible thermoplastic polymer against an aluminium drinks can followed by coating with a silver film, to produce a rough nanostructured metallic surface. SERS is used for both qualitative (molecular fingerprint) and quantitative detection of dye molecules and food toxins. In addition, the SERS technique is also applied in combination with nanoelectrochemical square wave voltammetry to detect nano-concentrations of neonicotinoid pesticides. The enhanced sensitivity and minimum sample preparation requirements provide tremendous opportunities for food safety and security sectors. An impedimetric immunosensor device (with a micro SD style pin-out) was also developed for the serological diagnosis of viruses and antibodies associated with bovine respiratory disease and bovine liver fluke. The silicon chip devices consist of six on-chip nanoband electrodes which can be independently modified with a polymer layer for covalent immobilisation of capture and target biomolecules. This electrochemical biosensor technology provides label-free and cost-efficient sensing capability in a compact size, and demonstrates the potential development of immunoassay-based point-of-use devices for on-farm diagnosis or therapeutic monitoring in animal health applications. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher University College Cork en
dc.rights © 2018, Niamh Creedon. en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/ en
dc.subject Nanotechnology en
dc.subject SERS en
dc.subject Impedance en
dc.subject Neonicotinoids en
dc.subject Electrochemical sensor en
dc.subject Bovine respiratory disease en
dc.title Sensing at nanostructures for agri-food and enviromental applications en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral en
dc.type.qualificationname PhD en
dc.internal.availability Full text available en
dc.check.info Not applicable en
dc.description.version Accepted Version
dc.contributor.funder Science Foundation Ireland en
dc.description.status Not peer reviewed en
dc.internal.school Chemistry en
dc.check.type No Embargo Required
dc.check.reason Not applicable en
dc.check.opt-out Not applicable en
dc.thesis.opt-out false
dc.check.embargoformat Embargo not applicable (If you have not submitted an e-thesis or do not want to request an embargo) en
ucc.workflow.supervisor alan.oriordan@tyndall.ie
dc.internal.conferring Autumn 2018 en
dc.internal.ricu Tyndall National Institute en
dc.relation.project Science Foundation Ireland (US-Ireland Program SFI12/US/12476) en


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© 2018, Niamh Creedon. Except where otherwise noted, this item's license is described as © 2018, Niamh Creedon.
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