Organothiol Monolayer Formation Directly on Muscovite Mica

Poel, Wester de; Vlieg, E.; A., Ven, Kim H.; Gasseling, Anouk; Jordi, Lange,; Townsend, Eleanor R.; Engwerda, Anthonius H. J.; Jankowski, Maciej; Blijlevens, Melian A. R.; Werkhoven, B. L.; Drnec, Jakub; Carlà, Francesco; Felici, Roberto; Tuladhar, Aashish; Adhikari, Narendra M.; Yoreo, James J. De; Elemans, Johannes A. A. W.; Enckevort, W.J.P. van; Rowan, Alan E.

doi:10.1002/anie.201913327

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…Such self-assembled monolayers (SAMs) are a way to functionalize a surface, but little has been reported on the formation of carboxylic acid SAMs on calcite. The inverse process, i.e., the formation of calcite on a SAM of functionalized carboxylic acid, has been shown to allow the control of calcite crystallization. , We have here thus demonstrated the formation of highly ordered SAMs of lauric acid and stearic acid on calcite, while the SAMs of hexanoic acid and octanoic acid are much less ordered.…”

Section: Resultsmentioning

confidence: 63%

Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces

Brugman¹,

Accordini²,

Megens³

et al. 2022

J. Phys. Chem. C

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The adsorption of carboxylic acid molecules at the calcite (104) and the muscovite (001) surface was investigated using surface X-ray diffraction. All four investigated carboxylic acid molecules, hexanoic acid, octanoic acid, lauric acid, and stearic acid, were found to adsorb at the calcite surface. Whereas the shortest two carboxylic acid molecules, hexanoic acid and octanoic acid, showed limited ordering and a flexible, disordered chain, the two longest carboxylic acid molecules form fully ordered monolayers, i.e., these form highly structured self-assembled monolayers. The latter molecules are oriented almost fully upright, with a tilt of up to 10°. The oxygen atoms of the organic molecules are found at similar positions to those of water molecules at the calcite–water interface. This suggests that in both cases, the oxygen atoms compensate for the broken bonds at the calcite surface. Under the same experimental conditions, stearic acid does not adsorb to K + and Ca 2+ -functionalized muscovite mica because the neutral molecules do not engage in the ionic bonds typical for the mica interface. These differences in adsorption behavior are characteristic for the differences of the oil–solid interactions in carbonate and sandstone reservoirs.

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Section: Resultsmentioning

confidence: 63%

Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces

Brugman¹,

Accordini²,

Megens³

et al. 2022

J. Phys. Chem. C

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“…Therefore, mica has a wide range of applications, ranging from insulation of electronic components to an ingredient in cosmetics. The versatility of mica attracts researchers to explore its potential applications including the formation of self-assembled organothiol monolayer as a template for crystalline growth 2 , preparation of mica glass–ceramics materials for hydrogen storage 3 , growth of flexible epitaxial ferroelectric oxide thin films for piezoelectric energy harvesting 4 , synthesis of ZnO nanorods for dye-sensitized solar cells and piezoelectric nanogenerators 5 , and fabrication of flexible mica film for high-temperature energy storage 6 .…”

Section: Introductionmentioning

confidence: 99%

Origin of observed narrow bandgap of mica nanosheets

Lee

2022

Sci Rep

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Mica nanosheets possess peculiar feature of narrowed bandgap with the decrease of thickness but a conclusive theoretical understanding of the narrowing mechanisms is still under development. In this report, first-principles calculations were carried out to investigate the electronic band structure of mica nanosheets with the deposition of K2CO3. Bulk mica shows an indirect bandgap of 4.90 eV. Mica nanosheets show similar electronic structures to bulk mica with a gradually increased bandgap of 4.44 eV, 4.52 eV and 4.67 eV for 1-layer, 2-layers and 3-layers nanosheets, respectively, which is attributed to the lattice relaxation. K2CO3 is found to have strong affinity towards mica nanosheets. The K2CO3 deposited mica nanosheets showed an increased bandgap with the increase of thickness, consistent with experimental observations. The calculated bandgap of K2CO3 deposited mica for 2-layers and 3-layers nanosheets are 2.60 eV and 2.75 eV, respectively, which are comparable with the corresponding experimental values of 2.5 eV and 3.0 eV. Our theoretical findings support the experimental evidence of surface contamination of mica by K2CO3, and provide new insight into the structure and properties of 2D mica.

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“…They include e.g. vibrational spectroscopy (polarization modulation (PM) IRAS), composition (X-ray photoelectron spectroscopy; NAP-XPS 54,55 ) and structure characterization (surface X-ray diffraction (SXRD), 56,57 electron microscopy 58 and scanning tunnelling microscopy 55,59 ). These methods, which can be applied to both solid/gas and solid/liquid interfaces, were previously contrasted to SFG.…”

Section: Introduction: Sfg In Heterogeneous Catalysismentioning

confidence: 99%