title: Resonantly Enhanced Nonlinear Optical Probes of Oxidized Multiwalled Carbon Nanotubes at Supported Lipid Bilayers.
abstract: With production of carbon nanotubes surpassing billions of tons per annum, concern about their potential interactions with biological systems is growing. Herein, we utilize second harmonic generation spectroscopy, sum frequency generation spectroscopy, and quartz crystal microbalance with dissipation monitoring to probe the interactions between oxidized multiwalled carbon nanotubes (O-MWCNTs) and supported lipid bilayers composed of phospholipids with phosphatidylcholine head groups as the dominant component. We quantify O-MWCNT attachment to supported lipid bilayers under biogeochemically relevant conditions and discern that the interactions occur without disrupting the structural integrity of the lipid bilayers for the systems probed. The extent of O-MWCNT sorption was far below a monolayer even at 100 mM NaCl and was independent of the chemical composition of the supported lipid bilayer.
authors.affiliation: Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Alicia C
authors.initials: AC
authors.lastname: McGeachy
authors.affiliation: Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Laura L
authors.initials: LL
authors.lastname: Olenick
authors.affiliation: Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Julianne M
authors.initials: JM
authors.lastname: Troiano
authors.affiliation: Department of Chemistry, Johns Hopkins University , Baltimore, Maryland 21218, United States.
authors.forename: Ronald S
authors.initials: RS
authors.lastname: Lankone
authors.affiliation: Environmental Chemistry and Technology Program, University of Wisconsin , Madison, Wisconsin 53706, United States.
authors.forename: Eric S
authors.initials: ES
authors.lastname: Melby
authors.affiliation: Environmental Chemistry and Technology Program, University of Wisconsin , Madison, Wisconsin 53706, United States.
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Kuech
authors.affiliation: Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Eseohi
authors.initials: E
authors.lastname: Ehimiaghe
authors.affiliation: Department of Chemistry, Johns Hopkins University , Baltimore, Maryland 21218, United States.
authors.forename: D Howard
authors.initials: DH
authors.lastname: Fairbrother
authors.affiliation: Environmental Chemistry and Technology Program, University of Wisconsin , Madison, Wisconsin 53706, United States.|Department of Chemistry, University of Wisconsin , Madison, Wisconsin 53706, United States.
authors.forename: Joel A
authors.identifier: 0000-0002-3918-1860
authors.initials: JA
authors.lastname: Pedersen
authors.affiliation: Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Franz M
authors.identifier: 0000-0001-8569-4045
authors.initials: FM
authors.lastname: Geiger
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry*; D008051:Lipid Bilayers / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D005456:Fluorescent Dyes; D008051:Lipid Bilayers; D037742:Nanotubes, Carbon