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dc.contributor.authorGutierrez, Leonardo
dc.contributor.authorAubry, Cyril
dc.contributor.authorDramas, Laure
dc.contributor.authorAimar, Pierre
dc.contributor.authorCroue, Jean-Philippe
dc.date.accessioned2016-06-27T10:21:11Z
dc.date.available2016-06-27T10:21:11Z
dc.date.issued2016-06-24
dc.identifier.citationCharacterization of Skeletonema costatum Intracellular Organic Matter and Study of Nanomechanical Properties under Different Solution Conditions 2016 Colloids and Surfaces A: Physicochemical and Engineering Aspects
dc.identifier.issn09277757
dc.identifier.doi10.1016/j.colsurfa.2016.06.025
dc.identifier.urihttp://hdl.handle.net/10754/614815
dc.description.abstractIn the current investigation, a rigorous characterization of the high molecular weight (HMW) compounds of Skeletonema costatum (SKC) intracellular organic matter (IOM), including nanomechanical properties, was conducted. HMW SKC-IOM was characterized as a mixture of polysaccharides, proteins, and lipids. Atomic force microscopy (AFM) provided crucial information of this isolate at a nanoscale resolution. HMW SKC-IOM showed highly responsive to solution chemistry: fully extended chains at low ionic strength, and compressing structures with increasing electrolyte concentration in solution. Interestingly, two regions of different nanomechanical properties were observed: (a) Region #1: located farther from the substrate and showing extended polymeric chains, and (b) Region #2: located <10 nm above the substrate and presenting compressed structures. The polymer length, polymer grafting density, and compressibility of these two regions were highly influenced by solution conditions. Results suggest that steric interactions originating from HMW SKC-IOM polymeric structure would be a dominant interacting mechanism with surfaces. The current investigation has successfully applied models of polymer physics to describe the complex HMW SKC-IOM structural conformation at different solution conditions. The detailed methodology presented provides a tool to characterize and understand biopolymers interactions with surfaces, including filtration membranes, and can be extended to other environmentally relevant organic compounds.
dc.description.sponsorshipThe authors are grateful to the funding from King Abdullah University of Science and Technology (KAUST).
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0927775716304678
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Colloids and Surfaces A: Physicochemical and Engineering Aspects. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Colloids and Surfaces A: Physicochemical and Engineering Aspects, 17 June 2016. DOI: 10.1016/j.colsurfa.2016.06.025
dc.subjectAtomic force microscopy
dc.subjectOrganic matter
dc.subjectnanomechanical properties
dc.subjectSkeletonema Costatum
dc.subjectInterfacial interactions
dc.titleCharacterization of Skeletonema costatum Intracellular Organic Matter and Study of Nanomechanical Properties under Different Solution Conditions
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.eprint.versionPost-print
dc.contributor.institutionCurtin Water Quality Research Centre, Department of Chemistry, Curtin University, Australia
dc.contributor.institutionFacultad del Mar y Medio Ambiente, Universidad del Pacifico, Guayaquil, Ecuador
dc.contributor.institutionMasdar Institute of Science and Technology, Abu Dhabi, United Arab Emirates
dc.contributor.institutionUniversity of Toulouse, Toulouse, France
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personDramas, Laure
kaust.personCroue, Jean-Philippe
dc.date.published-online2016-06-24
dc.date.published-print2016-10


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