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dc.contributor.authorLeo Tsui, H. C.
dc.contributor.authorAlsalman, Osamah
dc.contributor.authorMao, Boyang
dc.contributor.authorAlodhayb, Abdullah
dc.contributor.authorAlbrithen, Hamad
dc.contributor.authorKnights, Andrew P.
dc.contributor.authorHalsall, Matthew P.
dc.contributor.authorCrowe, Iain F.; email: iain.crowe@manchester.ac.uk
dc.date.accessioned2021-06-12T15:29:40Z
dc.date.available2021-06-12T15:29:40Z
dc.date.issued2020-06-12
dc.date.submitted2020-01-07
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/624923/41598_2020_Article_66389_nlm.xml?sequence=2
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/624923/41598_2020_Article_66389.pdf?sequence=3
dc.identifier.citationScientific Reports, volume 10, issue 1, page 9592
dc.identifier.urihttp://hdl.handle.net/10034/624923
dc.descriptionFrom Springer Nature via Jisc Publications Router
dc.descriptionHistory: received 2020-01-07, accepted 2020-05-17, registration 2020-05-20, pub-electronic 2020-06-12, online 2020-06-12, collection 2020-12
dc.descriptionPublication status: Published
dc.description.abstractAbstract: The optical response of a graphene oxide integrated silicon micro-ring resonator (GOMRR) to a range of vapour phase Volatile Organic Compounds (VOCs) is reported. The response of the GOMRR to all but one (hexane) of the VOCs tested is significantly higher than that of the uncoated (control) silicon MRR, for the same vapour flow rate. An iterative Finite Difference Eigenmode (FDE) simulation reveals that the sensitivity of the GO integrated device (in terms of RIU/nm) is enhanced by a factor of ~2, which is coupled with a lower limit of detection. Critically, the simulations reveal that the strength of the optical response is determined by molecular specific changes in the local refractive index probed by the evanescent field of the guided optical mode in the device. Analytical modelling of the experimental data, based on Hill-Langmuir adsorption characteristics, suggests that these changes in the local refractive index are determined by the degree of molecular cooperativity, which is enhanced for molecules with a polarity that is high, relative to their kinetic diameter. We believe this reflects a molecular dependent capillary condensation within the graphene oxide interlayers, which, when combined with highly sensitive optical detection, provides a potential route for discriminating between different vapour phase VOCs.
dc.languageen
dc.publisherNature Publishing Group UK
dc.rightsLicence for this article: http://creativecommons.org/licenses/by/4.0/
dc.sourceeissn: 2045-2322
dc.subjectArticle
dc.subject/639/624/1107/510
dc.subject/639/624/1107/527
dc.subjectarticle
dc.titleGraphene oxide integrated silicon photonics for detection of vapour phase volatile organic compounds
dc.typearticle
dc.date.updated2021-06-12T15:29:39Z
dc.date.accepted2020-05-17


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