Interfacial Colloidal Assembly Guided by Optical Tweezers and Tuned Via Surface Charge

aut.relation.endpage109
aut.relation.journalJournal of Colloid and Interface Scienceen_NZ
aut.relation.startpage101
aut.relation.volume621en_NZ
aut.researcherChen, Jack
dc.contributor.authorPradhan, Sen_NZ
dc.contributor.authorWhitby, CPen_NZ
dc.contributor.authorWilliams, MAKen_NZ
dc.contributor.authorChen, JLYen_NZ
dc.contributor.authorAvci, Een_NZ
dc.date.accessioned2022-08-16T01:40:33Z
dc.date.available2022-08-16T01:40:33Z
dc.date.copyright2022-09-01en_NZ
dc.date.issued2022-09-01en_NZ
dc.description.abstractHypothesis: The size, shape and dynamics of assemblies of colloidal particles optically-trapped at an air–water interface can be tuned by controlling the optical potential, particle concentration, surface charge density and wettability of the particles and the surface tension of the solution. Experiments: The assembly dynamics of different colloidal particle types (silica, polystyrene and carboxyl coated polystyrene particles) at an air–water interface in an optical potential were systematically explored allowing the effect of surface charge on assembly dynamics to be investigated. Additionally, the pH of the solutions were varied in order to modulate surface charge in a controllable fashion. The effect of surface tension on these assemblies was also explored by reducing the surface tension of the supporting solution by mixing ethanol with water. Findings: Silica, polystyrene and carboxyl coated polystyrene particles showed distinct assembly behaviours at the air–water interface that could be rationalised taking into account changes in surface charge (which in addition to being different between the particles could be modified systematically by changing the solution pH). Additionally, this is the first report showing that wettability of the colloidal particles and the surface tension of the solution are critical in determining the resulting assembly at the solution surface.en_NZ
dc.identifier.citationJournal of Colloid and Interface Science, Volume 621, September 2022, Pages 101-109.
dc.identifier.doi10.1016/j.jcis.2022.04.044en_NZ
dc.identifier.issn0021-9797en_NZ
dc.identifier.issn1095-7103en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/15378
dc.publisherElsevier
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0021979722005975
dc.rights© 2022 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
dc.rights.accessrightsOpenAccessen_NZ
dc.subjectOptical tweezers; Surface charge; Wettability; Inter-facial assemblies
dc.titleInterfacial Colloidal Assembly Guided by Optical Tweezers and Tuned Via Surface Chargeen_NZ
dc.typeJournal Article
pubs.elements-id453868
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Faculty of Health & Environmental Science
pubs.organisational-data/AUT/Faculty of Health & Environmental Science/School of Science
pubs.organisational-data/AUT/Faculty of Health & Environmental Science/School of Science/Chemistry Department
pubs.organisational-data/AUT/PBRF
pubs.organisational-data/AUT/PBRF/PBRF Health and Environmental Sciences
pubs.organisational-data/AUT/PBRF/PBRF Health and Environmental Sciences/HA Science 2018 PBRF
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