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dc.contributor.authorNishida, Roberten
dc.contributor.authorBoies, Adamen
dc.contributor.authorHochgreb, Simoneen
dc.date.accessioned2018-03-20T15:20:26Z
dc.date.available2018-03-20T15:20:26Z
dc.date.issued2018-05-04en
dc.identifier.issn0278-6826
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/274132
dc.description.abstractDirect ultraviolet (UV) photoionization enables electrical charging of aerosol nanoparticles with- out relying on the collision of particles and ions. In this work, a low-strength electric field is applied during particle photoionization to capture charge as it is photoemitted from the par- ticles in continuous flow, yielding a novel electrical current measurement. As in conventional photocharging-based measurement devices, a distinct electrical current from the remaining pho- tocharged particles is also measured downstream. The two distinct measured currents are proportional to the total photoelectrically active area of the particles. A three dimensional numerical model for particle and ion (dis)charging and transport is evaluated by comparing simulations of integrated electric currents with those from charged soot particles and ions in an experimental photoionization chamber. The model and experiment show good quantitative agreement for a single empirical constant, KcI, over a range of particle sizes and concentrations providing confidence in the theoretical equations and numerical method used.
dc.publisherTaylor & Francis
dc.titleMeasuring ultrafine aerosols by direct photoionization and charge capture in continuous flowen
dc.typeArticle
prism.endingPage556
prism.issueIdentifier5en
prism.publicationDate2018en
prism.publicationNameAerosol Science and Technologyen
prism.startingPage546
prism.volume52en
dc.identifier.doi10.17863/CAM.21215
dcterms.dateAccepted2018-01-18en
rioxxterms.versionofrecord10.1080/02786826.2018.1430350en
rioxxterms.versionAM*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-05-04en
dc.contributor.orcidNishida, Robert [0000-0002-9820-1569]
dc.contributor.orcidBoies, Adam [0000-0003-2915-3273]
dc.contributor.orcidHochgreb, Simone [0000-0001-7192-4786]
dc.identifier.eissn1521-7388
rioxxterms.typeJournal Article/Reviewen
rioxxterms.freetoread.startdate2019-02-02


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