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dc.contributor.authorBorovský, Ján
dc.date.accessioned2018-12-10T13:10:06Z
dc.date.available2018-12-10T13:10:06Z
dc.date.issued2018
dc.identifier.isbn978-951-39-7635-4fi
dc.identifier.isbn978-951-39-7635-4
dc.identifier.otheroai:jykdok.linneanet.fi:1912121
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/60541
dc.description.abstractSorting of carbon nanotubes by their chirality is the current bottleneck in the way to their broad employment based on their exceptional electronic and optical properties. Despite the extensive effort, there is no known method, which would result in really pure chirality ensembles. Previously reported sorting protocols result in enrichment rather than in sorting, alter electronic structure, and suffer from low yield. This is mostly due to the statistical approach, where the nanotubes with mixed chiralities are treated as a set. In this thesis, we propose a new sorting technique based on nanotube-by-nanotube compartmelization, characterization, and sorting in a continuously running droplet-based microfluidic device. A new microfluidic platform for droplet-based experiments in femtoliter scale has been fully developed in this work. We report manufacture of full-glass spectroscopy-friendly microfluidic chips with the characteristic length of channels below 3 μm. A novel procedure for immersed planar metallic electrodes suitable for the harsh glass processing is introduced. Selective treatment of the channels with a hydrophobic self-assembled monolayer is implemented for stable water-in-oil droplet microfluidics. Several unique properties of the system: the size, the unorthodox capacity of low droplet formation frequency, effective trap system, and tailored fluorescence detection system, were developed with the aim of lowering the detection limit down to single nanotube level. The automated processing of fluorescence spectra triggers the dielectrophoretic sorting valve deflecting the nanotube carrying droplets to either the reservoir or to the waste. Besides the primary goal, this microfluidic platform represents a powerful experimental tool to be employed in various fields of research. A method of individualization of carbon nanotubes in an aqueous dispersion based on sonication and centrifugation is systematically addressed in this thesis. The purity, level of individualization, quality of individualized nanotubes, and long-term stability are found to be critically dependent on the sonication parameters, mainly the sonication power. For the purpose of water-in-oil droplet microfluidics, a unique protocol for depletion of the surfactant at unaltered level of individualization is reported. The development described in this thesis brought the project to the very doorstep of automated carbon nanotubes sorting, one nanotube at the time. We believe that successful realization of the sorting would allow a major breakthrough in small-scale applications of single nanotube devices with precise chirality requirements for achieving the desired behavior.fi
dc.format.extent1 verkkoaineisto (199 sivua, 19 sivua useina numerointijaksoina) : kuvitettu
dc.language.isoeng
dc.publisherUniversity of Jyväskylä
dc.relation.ispartofseriesResearch report / Department of Physics, University of Jyväskylä
dc.relation.isversionofJulkaistu myös painettuna.
dc.subject.othercarbon nanotubes
dc.subject.othersorting
dc.subject.otherindividualization
dc.subject.otherdispersion
dc.subject.otherSDBS
dc.subject.othersonication
dc.subject.othercentrifugation
dc.subject.otherlong-term stability
dc.subject.othernear-infrared fluorescence
dc.subject.othermicrofluidics
dc.subject.otherglass microfabrication
dc.subject.otherwet etching
dc.subject.othermetallic electrodes
dc.subject.otherTADB
dc.subject.othersilinization
dc.subject.otherdroplet-based
dc.subject.otherwater-in-oil
dc.subject.otherdecane
dc.subject.otherSpan 80
dc.subject.otherlow droplet formation frequency
dc.subject.otherpassive trapping
dc.subject.otherdielectrophoresis
dc.subject.otherdroplet stability
dc.subject.othersurface tension
dc.subject.otherinterfacial tension
dc.titleDevelopment of microfluidics for sorting of carbon nanotubes
dc.identifier.urnURN:ISBN:978-951-39-7635-4
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineFysiikkafi
dc.relation.issn0075-465X
dc.relation.numberinseries2018, 11
dc.rights.accesslevelopenAccessfi
dc.subject.ysonanoputket
dc.subject.ysolajittelu
dc.subject.ysodispersiot
dc.subject.ysoerotusmenetelmät
dc.subject.ysoultraääni
dc.subject.ysolinkoaminen
dc.subject.ysofluoresenssi
dc.subject.ysospektroskopia
dc.subject.ysomikrotekniikka
dc.subject.ysomikropiirit
dc.subject.ysonestefysiikka
dc.subject.ysopisarat
dc.subject.ysorajapintailmiöt


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