The study of supramolecular structure of asphaltenes by atomic force microscopy

Sharipov, T. I.; Dolomatov, M. Yu.; Bakhtizin, R. Z.

doi:10.1088/1757-899x/443/1/012028

Cited by 5 publications

(5 citation statements)

References 10 publications

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“…Studies reporting atomic force microscopy (AFM) results of deposited asphaltene films, originating from sources similar to those of our samples, revealed structures constructed from aggregates of asphaltene molecules. These structures exhibited shapes such as thin disks, spheres, fractal-like patterns, oblate ellipsoids, prolate, or discoid. − AFM measurements, conducted in an air atmosphere on asphaltene films deposited over mica substrates, revealed disk-shaped objects with a consistent crystallite height averaging 1.3–1.4 nm and a width ranging from 30 to 35 nm …”

Section: Experimental Methodsmentioning

confidence: 99%

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Exploring the Gas Sensing Potential of Cross-Linked Asphaltene: A Promising Application of an Affordable Material

Hejazi,

Ok,

Samuel

et al. 2023

ACS Appl. Mater. Interfaces

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In recent years, there has been significant research interest in carbon-based nanomaterials as promising candidates for sensing technologies. Herein, we present the first utilization of asphaltenes as an affordable, cost-efficient carbon-based material for gas sensing applications. Asphaltenes, derived from various oil sources, are subjected to facile cross-linking reactions to produce nanoporous carbon materials, where the asphaltene molecules from different layers are interconnected via covalent bonds. The characterization results of these cross-linked asphaltenes revealed substantial enhancement in their specific surface area and surface functionality. Quartz crystal microbalance sensors with sensing films derived from various asphaltene samples were prepared to detect different ethanol concentrations at room temperature. All the cross-linked asphaltene samples showed a significant enhancement in the sensing response (up to 430%) compared to that of their respective raw parent samples. Such a response of the cross-linked asphaltene samples was comparable to that obtained from graphene oxide. The sensor based on cross-linked asphaltenes demonstrated good linearity, with a response time of approximately 2.4 min, a recovery time of around 8 min, and an excellent response repeatability. After 30 days, the sensor based on cross-linked asphaltenes showed approximately 40% reduction in its response, suggesting long-term aging. This decline is partially attributed to the observed swelling. The current study opens the door to a deeper exploration of asphaltenes and highlights their potential as promising candidates for sensing applications.

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Section: Experimental Methodsmentioning

confidence: 99%

“…43−46 AFM measurements, conducted in an air atmosphere on asphaltene films deposited over mica substrates, revealed disk-shaped objects with a consistent crystallite height averaging 1.3−1.4 nm and a width ranging from 30 to 35 nm. 44 2.4. Preparation of Asphaltene-Coated Sensors.…”

Section: Asphaltene Cross-linking Reactionsmentioning

confidence: 99%

Exploring the Gas Sensing Potential of Cross-Linked Asphaltene: A Promising Application of an Affordable Material

Hejazi,

Ok,

Samuel

et al. 2023

ACS Appl. Mater. Interfaces

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“…Sharipov et al 40 studied the supramolecular structure formation of asphaltene molecules at solid interphases on mica surfaces by AFM. The primary goal was to utilize AFM to research the supramolecular structure of asphaltene molecules and to visualize crystallites of asphaltenes in high resolution.…”

Section: Chemical Structures Of Asphaltenesmentioning

confidence: 99%

The Asphaltenes: State-of-the-Art Applications and Future Perspectives in Materials Science

Ok,

Samuel,

Bahzad

et al. 2024

Energy Fuels

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In the present review article, we summarize current investigations and contributions on a wide range applications of asphaltenes. Asphaltenes have been studied extensively for their potential novel applications. Recently, there has been increasing interest in revealing the potential of asphaltenes in different areas, such as electronics, polymer composites, supercapacitors, and gas-adsorbing matrixes. Upon giving describing asphaltenes’ structural characteristics, we focus on the applications of asphaltenes by correlating their chemical and electronic structure to their applications. After summarizing lessons learned about asphaltenes, we conclude the review by proposing new areas to apply asphaltenes and how to improve the current applications of asphaltenes.

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“…Figueira et al 13 monitored asphaltene precipitation using near-infrared (NIR) and particle sizes using AFM and concluded that AFM was a promising tool for evaluating asphaltene aggregate size in systems with relatively high asphaltene concentrations, overcoming the disadvantage of light scattering in such scenarios. Sharipov et al 14 used AFM to image supramolecular asphaltene structures and observed separate crystallites of disc-shaped form on a mica substrate. More recently, Marcano et al 15 used AFM to study wettability change mechanisms in a calcite−crude oil system and proposed that the asphaltene fraction acts as an anchor for increased oil adsorption, promoting the change from water-wet to oil-wet.…”

Section: ■ Introductionmentioning

confidence: 99%

Machine Learning Suggests Possible Bias in Molecular Simulations for Asphaltene Systems

Perez,

Ali,

Wang

et al. 2024

Energy Fuels

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Asphaltenes are defined as a solubility class rather than a singular family of molecular compounds; therefore, there is no unique molecular structure that corresponds to asphaltene. Perhaps as a consequence of this definition, direct probing of the physical and chemical properties of asphaltene molecules has been historically challenging in the laboratory. It was only in the past few years that experimental imaging of asphaltene structures resolved representative molecular geometries. Could the identification deriving from these experiments be useful for moving forward our collective understanding of the properties of asphaltenes? Is the experimental identification of numerous asphaltene molecules implying that simulations should consider all of these compounds for providing useful insights? Is it possible that the community has been considering a limited sample of asphaltene molecules when attempting to shed light on asphaltene behavior? This review attempts to address these questions with the help of unsupervised clustering. The results demonstrate that the experimental asphaltene structures can be clustered into four groups that resolve different physical properties of asphaltenes. Then, we probe the existing literature to assess whether compounds representative of the molecules experimentally identified as "asphaltenes" using noncontact atomic force microscopy (nc-AFM) [

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The study of supramolecular structure of asphaltenes by atomic force microscopy

Cited by 5 publications

References 10 publications

Exploring the Gas Sensing Potential of Cross-Linked Asphaltene: A Promising Application of an Affordable Material

Exploring the Gas Sensing Potential of Cross-Linked Asphaltene: A Promising Application of an Affordable Material

The Asphaltenes: State-of-the-Art Applications and Future Perspectives in Materials Science

Machine Learning Suggests Possible Bias in Molecular Simulations for Asphaltene Systems

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