Evidence for Considerable Metal Cation Concentrations from Lithium Intercalation Compounds in the Nano-Bio Interface Gap

Merve Doǧangün; Mimi N. Hang; Jo Machesky; Alicia C. McGeachy; Naomi Dalchand; Robert J. Hamers; Franz M Geiger

doi:10.1021/acs.jpcc.7b09187

Evidence for Considerable Metal Cation Concentrations from Lithium Intercalation Compounds in the Nano-Bio Interface Gap

Merve Doǧangün, Mimi N. Hang, Jo Machesky, Alicia C. McGeachy, Naomi Dalchand, Robert J. Hamers, Franz M Geiger^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

An experimental investigation of how electrostatics and ion dissolution impact the interaction between nanosheets of lithium intercalation compounds and supported lipid bilayers has revealed evidence for considerable metal cation concentrations in the nanosheets-bilayer (the "nano-bio interface") gap. Specifically, elevated concentrations of aqueous metal ions in the 1 mg/L concentration regime produce vibrational sum frequency generation signal intensity changes that are commensurate with the induction of compositional membrane asymmetry. This outcome is consistent with the notion that the induction of bilayer asymmetry by LiCoO₂ nanosheets occurs through a noncontact mechanism that primarily involves the interaction of negatively charged lipids with dissolved ions concentrated within the electrical double layers present in the nano-bio interface gap. Our findings provide a possible avenue for redesign strategies that mitigate noncontact interactions between nanomaterials and biological interfaces, enabling the design of new energy storage materials with reduced environmental impacts.

Original language	English (US)
Pages (from-to)	27473-27482
Number of pages	10
Journal	Journal of Physical Chemistry C
Volume	121
Issue number	49
DOIs	https://doi.org/10.1021/acs.jpcc.7b09187
State	Published - Dec 14 2017

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Evidence for Considerable Metal Cation Concentrations from Lithium Intercalation Compounds in the Nano-Bio Interface Gap",

abstract = "An experimental investigation of how electrostatics and ion dissolution impact the interaction between nanosheets of lithium intercalation compounds and supported lipid bilayers has revealed evidence for considerable metal cation concentrations in the nanosheets-bilayer (the {"}nano-bio interface{"}) gap. Specifically, elevated concentrations of aqueous metal ions in the 1 mg/L concentration regime produce vibrational sum frequency generation signal intensity changes that are commensurate with the induction of compositional membrane asymmetry. This outcome is consistent with the notion that the induction of bilayer asymmetry by LiCoO2 nanosheets occurs through a noncontact mechanism that primarily involves the interaction of negatively charged lipids with dissolved ions concentrated within the electrical double layers present in the nano-bio interface gap. Our findings provide a possible avenue for redesign strategies that mitigate noncontact interactions between nanomaterials and biological interfaces, enabling the design of new energy storage materials with reduced environmental impacts.",

author = "Merve Doǧang{\"u}n and Hang, {Mimi N.} and Jo Machesky and McGeachy, {Alicia C.} and Naomi Dalchand and Hamers, {Robert J.} and Geiger, {Franz M}",

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month = dec,

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doi = "10.1021/acs.jpcc.7b09187",

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Evidence for Considerable Metal Cation Concentrations from Lithium Intercalation Compounds in the Nano-Bio Interface Gap. / Doǧangün, Merve; Hang, Mimi N.; Machesky, Jo; McGeachy, Alicia C.; Dalchand, Naomi; Hamers, Robert J.; Geiger, Franz M.

In: Journal of Physical Chemistry C, Vol. 121, No. 49, 14.12.2017, p. 27473-27482.

Research output: Contribution to journal › Article › peer-review

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AU - Doǧangün, Merve

AU - Hang, Mimi N.

AU - Machesky, Jo

AU - McGeachy, Alicia C.

AU - Dalchand, Naomi

AU - Hamers, Robert J.

AU - Geiger, Franz M

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AB - An experimental investigation of how electrostatics and ion dissolution impact the interaction between nanosheets of lithium intercalation compounds and supported lipid bilayers has revealed evidence for considerable metal cation concentrations in the nanosheets-bilayer (the "nano-bio interface") gap. Specifically, elevated concentrations of aqueous metal ions in the 1 mg/L concentration regime produce vibrational sum frequency generation signal intensity changes that are commensurate with the induction of compositional membrane asymmetry. This outcome is consistent with the notion that the induction of bilayer asymmetry by LiCoO2 nanosheets occurs through a noncontact mechanism that primarily involves the interaction of negatively charged lipids with dissolved ions concentrated within the electrical double layers present in the nano-bio interface gap. Our findings provide a possible avenue for redesign strategies that mitigate noncontact interactions between nanomaterials and biological interfaces, enabling the design of new energy storage materials with reduced environmental impacts.

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