Accessing the structural and thermodynamic properties of ultra-thin layers of C32 adsorbed on a SiO2 surface

Gutierrez-Maldonado, Sebastian E.; Gárate, José Antonio; Retamal, María José; Cisternas, Marcelo A; Volkmann, U.G.; Pérez-Acle, Tomás

doi:10.1016/j.cplett.2017.01.065

Cited by 4 publications

(3 citation statements)

References 43 publications

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“…This growth model has been reported for vapor deposited and dip-coated films by employing surface-sensitive x-ray scattering methods [32], atomic force microscopy (AFM) [33] and ellipsometry [31]. Molecular Dynamics simulations corroborate this peculiar multilayer structure [34,35] and trace it to a subtle interplay of intermolecular interactions of the rod-like molecules and their interaction with the oxidic substrate.…”

Section: Introductionsupporting

confidence: 64%

How water wets and self-hydrophilizes nanopatterns of physisorbed hydrocarbons

Díaz

Nickel

Moraga

et al. 2022

Journal of Colloid and Interface Science

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Section: Introductionsupporting

confidence: 64%

How water wets and self-hydrophilizes nanopatterns of physisorbed hydrocarbons

Díaz

Nickel

Moraga

et al. 2022

Journal of Colloid and Interface Science

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“…While on dielectric surfaces, a model is confirmed by Volkmann et al ,,,,,− that both dip-coated and evaporated dotriacontane (DTC, n -C 32 H 66 ) films on the SiO 2 surface are composed of two layers. This so-called “2 + 1” model is composed by a bilayer formed adjacent to the substrate with the DTC long axis oriented parallel to the surface (tilt-on, flat-on, or edge-on), and above this bilayer, a monolayer of end-up DTC molecules is assembled with the chain perpendicular to the surface.…”

Section: Introductionmentioning

confidence: 89%

Study of the Wetting of Paraffin Films on the Metal Surface in the Dynamic Dip-Coating Process Using Compressive-Sensing Sum-Frequency Generation Microscopy

2018

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A compressive-sensing sum-frequency generation microscope (CS-SFGM) is used to investigate the adsorption of the interfacial dotriacontane (n-C32H66) molecules on polycrystalline gold surfaces in the dip-coating process. Two adsorption configurations are primarily observed, related to the carbon plane, assigned as flat-on and edge-on based on SFG spectra, anisotropic curves, and SFG images. Distinct adsorption phases display a heterogeneous morphology composed by a series of ordered stripes. The stripe angles suggest that both the Marangoni flow and the molecular crystallization play a role in the dynamic patterning process. The SFG images imply that the well-aligned molecules adsorbed on the gold surface with an alkyl chain long axis laid about 70° away from the stripe direction. This study establishes CS-SFGM as a useful tool for probing dynamic patterning systems with its intrinsic chemical and surface sensitivity and selectivity.

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Section: Methodsmentioning

confidence: 99%

Effect of Preparation Processes on Structural Thermal Stability and Collision Energy Dissipation of Common Antirelaxation Coatings on Quartz Substrates

He,

Liu,

Tang

et al. 2023

Langmuir

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Paraffin and octadecyltrichlorosilane (OTS) coatings can alleviate collisions between alkali-metal atoms and cell walls and then prolong the atomic spin-polarization lifetime. The surface structure and collision effects of these antirelaxation coatings, as well as the methods to avoid antirelaxation invalidity, have been the focus of researchers. This study investigated the thermolability of coating surface structure and the collision interactions between alkali metal atoms and coatings, considering the influence of various coating preparation factors, where this collision interaction is indirectly analyzed by measuring the collision energy dissipation between an atomic force microscopy (AFM) probe and the atoms on the coating surface. We found that appropriate evaporation time, carbochain length, and postannealing process can enhance the thermostability of the paraffin coating and eliminate its morphological defects. Furthermore, the OTS/water concentration, the soaking time, and the type of solvent have different levels of influence on the cluster formation and the thermostability of the OTS coatings. Moreover, the antirelaxation performance of coatings has been shown to be characterized by counting the energy dissipated when the AFM probe collides with the antirelaxation coating, replacing the conventional light-atom interaction-based method for measuring the relaxation characteristics, but requiring specific coating preparation factors to be maintained.

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Accessing the structural and thermodynamic properties of ultra-thin layers of C32 adsorbed on a SiO2 surface

Cited by 4 publications

References 43 publications

How water wets and self-hydrophilizes nanopatterns of physisorbed hydrocarbons

How water wets and self-hydrophilizes nanopatterns of physisorbed hydrocarbons

Study of the Wetting of Paraffin Films on the Metal Surface in the Dynamic Dip-Coating Process Using Compressive-Sensing Sum-Frequency Generation Microscopy

Effect of Preparation Processes on Structural Thermal Stability and Collision Energy Dissipation of Common Antirelaxation Coatings on Quartz Substrates

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