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dc.contributor.authorHibberd, Amber M
dc.contributor.authorBergman, Susanna L
dc.contributor.authorZhong, Yu Lin
dc.contributor.authorBernasek, Steven L
dc.date.accessioned2018-07-26T03:45:48Z
dc.date.available2018-07-26T03:45:48Z
dc.date.issued2012
dc.identifier.issn0021-9606
dc.identifier.doi10.1063/1.4761934
dc.identifier.urihttp://hdl.handle.net/10072/173791
dc.description.abstractThe siloxane film derived from the 30-carbon chain triacontyltrichlorosilane (TCTS) is studied as an anti-relaxation coating for atomic vapor cells. The longitudinal spin relaxation lifetime of optically pumped potassium atoms in the presence of TCTS is measured and the average number of non-relaxing atom-wall collisions, or bounces, enabled by the coated surface is determined. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) of TCTS were performed to investigate changes in chemical states and surface morphology of TCTS arising from K atom deposition on the film surface. TCTS was found to give approximately 530 bounces. Following lifetime measurements, K2p signals were clearly observed in XPS spectra. AFM images display non-preferential K deposition on the TCTS surface, however additional AFM studies with a TCTS surface exposed to Rb atoms show deposition occurs along surface defects. In agreement, Rb is found to preferentially deposit along the step edges of an 18-carbon chain monolayer film derived from 1-Octadecene. Finally, AFM indicates a much smoother surface for a tetracontane coating relative to TCTS. The importance of siloxane surface morphology versus film thickness with respect to coating performance is discussed.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Institute of Physics
dc.relation.ispartofpagefrom174703-1
dc.relation.ispartofpageto174703-8
dc.relation.ispartofissue17
dc.relation.ispartofjournalJournal of Chemical Physics
dc.relation.ispartofvolume137
dc.subject.fieldofresearchFunctional Materials
dc.subject.fieldofresearchPhysical Sciences
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode091205
dc.subject.fieldofresearchcode02
dc.subject.fieldofresearchcode03
dc.subject.fieldofresearchcode09
dc.titlePotassium spin polarization lifetime for a 30-carbon chain siloxane film
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorZhong, Yulin


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