Growth and Dissolution of Calcite in the Presence of Adsorbed Stearic Acid

Ricci, Maria Antonietta; Segura, Juan José; Erickson, Blake; Fantner, Georg E.; Stellacci, Francesco; Voïtchovsky, Kislon

doi:10.1021/acs.langmuir.5b01732

Cited by 36 publications

(35 citation statements)

References 60 publications

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“…The AFM was operated in amplitude modulation with working amplitudes A between 0.5 nm and 1.5 nm and a setpoint ratio A / A 0 > 0.7, where A 0 is the free vibration amplitude of the tip away from the interface. In these conditions the phase lag φ between the driving vibration and that of the tip is sensitive to the behaviour of the liquid expelled by the vibrating tip and its affinity for the surface 7 41 43 44 , and the resolution is enhanced by short-range solvation forces 12 45 47 101 102 103 . The imaging working amplitude was however kept larger than ~0.5 nm so as not to sweep aside weakly adsorbed ions while imaging 12 13 .…”

Section: Methodsmentioning

confidence: 99%

Direct observation of the dynamics of single metal ions at the interface with solids in aqueous solutions

Ricci

Trewby

Cafolla

et al. 2017

Sci Rep

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The dynamics of ions adsorbed at the surface of immersed charged solids plays a central role in countless natural and industrial processes such as crystal growth, heterogeneous catalysis, electrochemistry, or biological function. Electrokinetic measurements typically distinguish between a so-called Stern layer of ions and water molecules directly adsorbed on to the solid's surface, and a diffuse layer of ions further away from the surface. Dynamics within the Stern layer remain poorly understood, largely owing to a lack of in-situ atomic-level insights. Here we follow the dynamics of single Rb + and H 3 O + ions at the surface of mica in water using high-resolution atomic force microscopy with 25 ms resolution. Our results suggest that single hydrated Rb + ions reside τ 1 = 104 ± 5 ms at a given location, but this is dependent on the hydration state of the surface which evolves on a slower timescale of τ 2 = 610 ± 30 ms depending on H 3 O + adsorption. Increasing the liquid's temperature from 5 °C to 65 °C predictably decreases the apparent glassiness of the interfacial water, but no clear effect on the ions' dynamics was observed, indicating a diffusion-dominated process. These timescales are remarkably slow for individual monovalent ions and could have important implications for interfacial processes in electrolytes.Most solids are charged in aqueous solutions. The ions dissolved in the liquid tend to accumulate near the solid's surface to ensure charge neutrality, forming a so-called electrical double layer. Countless natural and industrial processes rely on the organization and dynamics of ions in this layer, from crystal growth 1-3 , to heterogeneous catalysis 4 , electrochemistry 5 , or biological function [6][7][8][9][10] . Ionic distribution within the electrical double layer is typically described by the Gouy-Chapman-Stern model 11 that comprises a Stern layer of largely static ions and water molecules adsorbed to the solid's surface, and a diffuse layer of ions further away from the surface in the liquid. The diffuse layer region is generally well understood, but the Stern layer is more difficult to model, partly because continuous assumptions have to be made about an intrinsically discrete object where the size and nature of the adsorbed ions play an important role. Significantly, existing models assume a homogenous charge distribution within the Stern layer, which is unlikely to hold at the nanoscale. Recently, a handful of studies [12][13][14][15][16] have shown that it is possible to observe in-situ single ions within the Stern layer using atomic force microscopy (AFM). However these investigations were conducted at equilibrium and no information about the ion's dynamics could be derived. The motion of single ions at interfaces remains a central question in interfacial processes with significant implications in nanotechnology, for example in the development of novel power-generating devices 17,18 . Existing theories require corrections to explain experimental observations [19][20][21] . The 'dynami...

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Section: Methodsmentioning

confidence: 99%

Direct observation of the dynamics of single metal ions at the interface with solids in aqueous solutions

Ricci

Trewby

Cafolla

et al. 2017

Sci Rep

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“…However, cleaved calcite, treated with stearic acid, showed higher adhesion forces at pH 5 than pH 10. In a recent study [156], growth and dissolution of a stearic acid coated calcite crystal that was exposed to various aqueous salt solutions were investigated using amplitude-modulation atomic force microscope. It was believed that stearic acid particles tend to act as "pinning points" on the calcite crystal, interfering with the growth and dissolution process.…”

Section: Atomic Force Microscopymentioning

confidence: 99%

Low Salinity Waterflooding in Carbonate Reservoirs: Review of Interfacial Mechanisms

Derkani

Fletcher

Abdallah

et al. 2018

Colloids and Interfaces

147

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Carbonate rock reservoirs comprise approximately 60% of the world's oil and gas reserves. Complex flow mechanisms and strong adsorption of crude oil on carbonate formation surfaces can reduce hydrocarbon recovery of an oil-wet carbonate reservoir to as low as 10%. Low salinity waterflooding (LSW) has been confirmed as a promising technique to improve the oil recovery factor. However, the principal mechanism underpinning this recovery method is not fully understood, which poses a challenge toward designing the optimal salinity and ionic composition of any injection solution. In general, it is believed that there is more than one mechanism involved in LSW of carbonates; even though wettability alteration toward a more desirable state for oil to be recovered could be the main cause during LSW, how this alteration happens is still the subject of debate. This paper reviews different working conditions of LSW, previous studies, and field observations, alongside the proposed interfacial mechanisms which affect the colloidal interactions at oil-rock-brine interfaces. This paper provides a comprehensive review of studies on LSW in carbonate formation and further analyzes the latest achievements of LSW application in carbonates, which helps to better understand the challenges involved in these complicated multicomponent systems and potentially benefits the oil production industry.

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“…In the case of metal ions, recent studies 2 15 have shown that the incorporation process is largely governed by the molecular organisation and dynamics of water in contact with the mineral’s surface, highlighting the importance of surface defects. This may not be true for larger organic molecules such as alcohols that can also interact with the surface of calcite in solution 16 17 18 19 20 .…”

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confidence: 99%

Visualising the molecular alteration of the calcite (104) – water interface by sodium nitrate

Hofmann

Voïtchovsky

Spijker

et al. 2016

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The reactivity of calcite, one of the most abundant minerals in the earth’s crust, is determined by the molecular details of its interface with the contacting solution. Recently, it has been found that trace concentrations of NaNO3 severely affect calcite’s (104) surface and its reactivity. Here we combine molecular dynamics (MD) simulations, X-ray reflectivity (XR) and in situ atomic force microscopy (AFM) to probe the calcite (104) – water interface in the presence of NaNO3. Simulations reveal density profiles of different ions near calcite’s surface, with NO3− able to reach closer to the surface than CO32− and in higher concentrations. Reflectivity measurements show a structural destabilisation of the (104) surfaces’ topmost atomic layers in NaNO3 bearing solution, with distorted rotation angles of the carbonate groups and substantial displacement of the lattice ions. Nanoscale AFM results confirm the alteration of crystallographic characteristics, and the ability of dissolved NaNO3 to modify the structure of interfacial water was observed by AFM force spectroscopy. Our experiments and simulations consistently evidence a dramatic deterioration of the crystals’ surface, with potentially important implications for geological and industrial processes.

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Growth and Dissolution of Calcite in the Presence of Adsorbed Stearic Acid

Cited by 36 publications

References 60 publications

Direct observation of the dynamics of single metal ions at the interface with solids in aqueous solutions

Direct observation of the dynamics of single metal ions at the interface with solids in aqueous solutions

Low Salinity Waterflooding in Carbonate Reservoirs: Review of Interfacial Mechanisms

Visualising the molecular alteration of the calcite (104) – water interface by sodium nitrate

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