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Oleson, Timothy A.; Sahai, Nita; Wesolowski, David J.; Dura, Joseph A.; Majkrzak, C. F.; Giuffre, Anthony J.

doi:10.1016/j.jcis.2011.12.031

Cited by 13 publications

(5 citation statements)

References 37 publications

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“…DA and DA/DOH adsorb on both negatively-charged and positively-charged mineral surfaces, because adsorption is controlled by a combination of van der Waals, H-bonding and electrostatic forces. Similar correlations have been identified previously for phospholipid membrane stability at oxide surfaces and for cytotoxicity of oxide nanoparticles on bacterial cell surfaces1920212223. In detail, by using a combination of adsorption isotherms, fluorescent dye (calcein) leakage rate experiments, atomic force microscopy, neutron reflectivity and transmission electron microscopy, it was shown that dipalmitoylphosphocholine (DPPC) and ditridecanoylphosphocholine (DTPC) adsorb by forming incomplete multi-layer islands on the surfaces of quartz, rutile, mica and corundum (α-Al 2 O 3 )19202122.…”

Section: Resultssupporting

confidence: 84%

“…Similar correlations have been identified previously for phospholipid membrane stability at oxide surfaces and for cytotoxicity of oxide nanoparticles on bacterial cell surfaces1920212223. In detail, by using a combination of adsorption isotherms, fluorescent dye (calcein) leakage rate experiments, atomic force microscopy, neutron reflectivity and transmission electron microscopy, it was shown that dipalmitoylphosphocholine (DPPC) and ditridecanoylphosphocholine (DTPC) adsorb by forming incomplete multi-layer islands on the surfaces of quartz, rutile, mica and corundum (α-Al 2 O 3 )19202122. Furthermore, a modified Deraguin-Landau-Verwey-Overbeek (DLVO) theory was developed and combined with adsorption isotherms to explain how the electrostatic effect of the mineral’s surface charge is effective even up to 12 or 18 nm distance from the surface through 2 or 3 stacked bilayers of lipid on silica or alumina, respectively.…”

Section: Resultssupporting

confidence: 84%

“…On the other hand, the stability and formation kinetics of phospholipid bilayer membranes as well as the adhesion of prokaryotic and eukaryotic cells to oxide and aluminosilicate (muscovite mica) mineral surfaces is known to depend on the surface charge of minerals181920212223. Surface charge depends on the isoelectric point (IEP) of the mineral.…”

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confidence: 99%

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Mineral Surface Chemistry and Nanoparticle-aggregation Control Membrane Self-Assembly

Sahai

Kaddour

Dalai

et al. 2017

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The self-assembly of lipid bilayer membranes to enclose functional biomolecules, thus defining a “protocell,” was a seminal moment in the emergence of life on Earth and likely occurred at the micro-environment of the mineral-water interface. Mineral-lipid interactions are also relevant in biomedical, industrial and technological processes. Yet, no structure-activity relationships (SARs) have been identified to predict lipid self-assembly at mineral surfaces. Here we examined the influence of minerals on the self-assembly and survival of vesicles composed of single chain amphiphiles as model protocell membranes. The apparent critical vesicle concentration (CVC) increased in the presence of positively-charged nanoparticulate minerals at high loadings (mg/mL) suggesting unfavorable membrane self-assembly in such situations. Above the CVC, initial vesicle formation rates were faster in the presence of minerals. Rates were correlated with the mineral’s isoelectric point (IEP) and reactive surface area. The IEP depends on the crystal structure, chemical composition and surface hydration. Thus, membrane self-assembly showed rational dependence on fundamental mineral properties. Once formed, membrane permeability (integrity) was unaffected by minerals. Suggesting that, protocells could have survived on rock surfaces. These SARs may help predict the formation and survival of protocell membranes on early Earth and other rocky planets, and amphiphile-mineral interactions in diverse other phenomena.

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Section: Resultssupporting

confidence: 84%

Section: Resultssupporting

confidence: 84%

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Mineral Surface Chemistry and Nanoparticle-aggregation Control Membrane Self-Assembly

Sahai

Kaddour

Dalai

et al. 2017

Sci Rep

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“…Such studies could be developed by using neutron scattering techniques that could work for liquid-liquid interfaces. 26 AFM (atomic force microscopy) works for adsorbed surfactant layers on dry surfaces 27 and for free standing polymer membranes, 28 while one can use small angle X-ray scattering techniques 29 to study surfactant-demulsier interactions.…”

Section: Resultsmentioning

confidence: 99%

Electrocoalescence of water in oil emulsions: a DPD simulation study and a novel application of electroporation theory

2019

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“…The integrity or rupture of phospholipid vesicles and the affinity of bilayers in contact with oxide mineral surfaces has been examined by bulk adsorption isotherms, atomic force microscopy, neutron reflectivity, and classical DLVO theory modeling. [211][212][213][214][215] The head-group charge of the lipids as well as oxide surface charge, solution ionic strength and effect of divalent Ca 2+ ions was examined. It was found that phospholipid vesicles are more stable in contact with positively-charged mineral surfaces such as corundum rather than negativelycharged minerals surface such as quartz.…”

Section: Mineral Surfaces As Catalystsmentioning

confidence: 99%

Mineral–organic interfacial processes: potential roles in the origins of life

et al. 2012

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Life is believed to have originated on Earth B4.4-3.5 Ga ago, via processes in which organic compounds supplied by the environment self-organized, in some geochemical environmental niches, into systems capable of replication with hereditary mutation. This process is generally supposed to have occurred in an aqueous environment and, likely, in the presence of minerals. Mineral surfaces present rich opportunities for heterogeneous catalysis and concentration which may have significantly altered and directed the process of prebiotic organic complexification leading to life. We review here general concepts in prebiotic mineral-organic interfacial processes, as well as recent advances in the study of mineral surface-organic interactions of potential relevance to understanding the origin of life.

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Neutron reflectivity study of substrate surface chemistry effects on supported phospholipid bilayer formation on (112¯0

Cited by 13 publications

References 37 publications

Mineral Surface Chemistry and Nanoparticle-aggregation Control Membrane Self-Assembly

Mineral Surface Chemistry and Nanoparticle-aggregation Control Membrane Self-Assembly

Electrocoalescence of water in oil emulsions: a DPD simulation study and a novel application of electroporation theory

Mineral–organic interfacial processes: potential roles in the origins of life

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