H2O/D2O contrast variation for ultra-small-angle neutron scattering to minimize multiple scattering effects of colloidal particle suspensions

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dc.contributor.authorOtsuki, Aen_AU
dc.contributor.authorde Campo, Len_AU
dc.contributor.authorGarvey, CJen_AU
dc.contributor.authorRehm, Cen_AU
dc.date.accessioned2021-06-10T05:34:29Zen_AU
dc.date.available2021-06-10T05:34:29Zen_AU
dc.date.issued2018-09-07en_AU
dc.date.statistics2021-05-26en_AU
dc.description.abstractThis study investigated the use of solvent contrast (H2O/D2O ratio) as a means to optimize the ultra-small-angle neutron scattering (USANS) signal. By optimizing the signal, it was possible to reduce the undesirable effects of coherent multiple scattering while still maintaining a measurable scattered intensity. This result will further enable the use of USANS as a probe of the interactions between colloidal particles and their structures within concentrated suspensions as well as particle dispersion/aggregation. As a model system, we prepared silica colloidal particle suspensions at different solid concentrations. USANS curves were measured using the classical Bonse–Hart double crystal diffractometer while varying the scattering length density of the aqueous phase, thus varying the contrast to the silica particles. As a means of assessing the impact of multiple scattering effects on different q-values, we analyzed the scattered intensity at different contrasts at three different q values. The data were then used to determine the match point of the silica particle suspensions from the expected square root dependence of the scattered intensity with solvent composition, to analyze any differences associated with the solid concentration change, and to determine the optimum H2O/D2O ratio in terms of high transmission (TSAS > 80%) and high enough scattering intensity associated with the contrast of the system. Through this investigation series, we confirmed that adjusting the contrast of the solvent (H2O/D2O) is a good methodology to reduce multiple scattering while maintaining a strong enough scattering signal from a concentrated suspension of silica particles for both USANS and rheometric USANS (rheo-USANS) experiments.© The Authors - This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly citeden_AU
dc.identifier.citationOtsuki, A., De Campo, L., Garvey, C. J., & Rehm, C. (2018). H2O/D2O contrast variation for ultra-small-angle neutron scattering to minimize multiple scattering effects of colloidal particle suspensions. Colloid and Interfaces, 2(3), 37. doi:10.3390/colloids2030037en_AU
dc.identifier.issn2504-5377en_AU
dc.identifier.issue3en_AU
dc.identifier.journaltitleColloid and Interfacesen_AU
dc.identifier.pagination37en_AU
dc.identifier.urihttps://doi.org/10.3390/colloids2030037en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10855en_AU
dc.identifier.volume2en_AU
dc.language.isoenen_AU
dc.publisherMDPIen_AU
dc.subjectSolventsen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectScatteringen_AU
dc.subjectProbesen_AU
dc.subjectColloidsen_AU
dc.subjectParticlesen_AU
dc.subjectSilicaen_AU
dc.subjectTransmissionen_AU
dc.titleH2O/D2O contrast variation for ultra-small-angle neutron scattering to minimize multiple scattering effects of colloidal particle suspensionsen_AU
dc.typeJournal Articleen_AU
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