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dc.contributor.authorAgambayev, Agamyrat
dc.contributor.authorRajab, Karam Hani
dc.contributor.authorHassan, Ali H.
dc.contributor.authorFarhat, Mohamed
dc.contributor.authorBagci, Hakan
dc.contributor.authorSalama, Khaled N.
dc.date.accessioned2018-01-28T07:01:38Z
dc.date.available2018-01-28T07:01:38Z
dc.date.issued2018-01-22
dc.identifier.citationAgambayev A, Rajab KH, Hassan AH, Farhat M, Bagci H, et al. (2018) Towards fractional-order capacitors with broad tunable constant phase angles: multi-walled carbon nanotube-polymer composite as a case study. Journal of Physics D: Applied Physics 51: 065602. Available: http://dx.doi.org/10.1088/1361-6463/aaa4de.
dc.identifier.issn0022-3727
dc.identifier.issn1361-6463
dc.identifier.doi10.1088/1361-6463/aaa4de
dc.identifier.urihttp://hdl.handle.net/10754/626887
dc.description.abstractIn this study, multi-walled carbon nanotube (MWCNT) filled Polyevinelidenefluoride-trifluoroethylene-chlorofluoroethylene (PVDF-TrFE-CFE) composites are used to realize fractional-order capacitors (FOCs). A solution-mixing and drop-casting approach is used to fabricate the composite. Due to the high aspect ratio of MWCNTs, percolation regime starts at a small weight percentage (wt%), 1.00 % .The distributed MWCNTs inside the polymer act as an electrical network of micro-capacitors and micro-resistors, which, in effect, behaves like a FOC. The resulting FOCs' constant phase angle (CPA) can be tuned from to by changing the wt% of the MWCNTs. This is the largest dynamic range reported so far at the frequency range from 150 kHz to 2 MHz for an FOC. Furthermore, the CPA and pseudo-capacitance are shown to be practically stable (with less than 1% variation) when the applied voltage is, changed between 500 µV and 5V. For a fixed value of CPA, the pseudo-capacitance can be tuned by changing the thickness of the composite, which can be done in a straightforward manner via the solution-mixing and drop-casting fabrication approach. Finally, it is shown that the frequency of a Hartley oscillator built using an FOC is almost 15 times higher than that of a Hartley oscillator built using a conventional capacitor.
dc.description.sponsorshipThe authors would like to thank the King Abdullah University of Science and Technology (KAUST) and Saudi Basic Industries Corporation (SABIC) for funding this work under Grant No. RGC/3/2385-01.
dc.publisherIOP Publishing
dc.relation.urlhttp://iopscience.iop.org/article/10.1088/1361-6463/aaa4de
dc.rightsThis is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Physics D: Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://doi.org/10.1088/1361-6463/aaa4de
dc.titleTowards fractional-order capacitors with broad tunable constant phase angles: Multi-walled carbon nanotube-polymer composite as a case study
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentSABIC - Corporate Research and Innovation Center (CRI) at KAUST
dc.identifier.journalJournal of Physics D: Applied Physics
dc.eprint.versionPost-print
kaust.personAgambayev, Agamyrat
kaust.personRajab, Karam Hani
kaust.personHassan, Ali H.
kaust.personFarhat, Mohamed
kaust.personBagci, Hakan
kaust.personSalama, Khaled N.
kaust.grant.numberRGC/3/2385-01
refterms.dateFOA2019-01-03T00:00:00Z
dc.date.published-online2018-01-22
dc.date.published-print2018-02-14


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