Interfacial colloidal assembly guided by optical tweezers and tuned via surface charge

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dc.citation.issueSeptember 2022
dc.citation.volume621
dc.contributor.authorPradhan S
dc.contributor.authorWhitby CP
dc.contributor.authorWilliams MAK
dc.contributor.authorChen JLY
dc.contributor.authorAvci E
dc.coverage.spatialUnited States
dc.date.accessioned2024-01-12T00:58:15Z
dc.date.accessioned2024-07-25T06:46:10Z
dc.date.available2022-04-12
dc.date.available2024-01-12T00:58:15Z
dc.date.available2024-07-25T06:46:10Z
dc.date.issued2022-09
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.
dc.description.confidentialfalse
dc.format.pagination101-109
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/35452924
dc.identifier.citationPradhan S, Whitby CP, Williams MAK, Chen JLY, Avci E. (2022). Interfacial colloidal assembly guided by optical tweezers and tuned via surface charge.. J Colloid Interface Sci. 621. September 2022. (pp. 101-109).
dc.identifier.doi10.1016/j.jcis.2022.04.044
dc.identifier.eissn1095-7103
dc.identifier.elements-typejournal-article
dc.identifier.issn0021-9797
dc.identifier.piiS0021-9797(22)00597-5
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/70830
dc.languageeng
dc.publisherElsevier Inc
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S0021979722005975
dc.relation.isPartOfJ Colloid Interface Sci
dc.rights( ) 2022 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectInter-facial assemblies
dc.subjectOptical tweezers
dc.subjectSurface charge
dc.subjectWettability
dc.subjectOptical Tweezers
dc.subjectPolystyrenes
dc.subjectSilicon Dioxide
dc.subjectWater
dc.subjectWettability
dc.titleInterfacial colloidal assembly guided by optical tweezers and tuned via surface charge
dc.typeJournal article
pubs.elements-id453020
pubs.organisational-groupOther
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