Cross-Sectional Structure of Liquid 1-Decanol over Graphite

Hiasa, Takumi; Kimura, Kenjiro; Ōnishi, Hiroshi

doi:10.1021/jp310203s

Cited by 34 publications

(40 citation statements)

References 31 publications

(46 reference statements)

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“…Moreover, the large temperature effect of the solvation forces observed with AFM [26] and the lack of correlation between the measured forces and the tip radius [27]-indicating that the nanometer-scale microasperities of the tip dominate the short-range interaction-suggest novel molecular mechanisms underlying the squeezing out of liquids confined in the gap between the cantilever tip and the substrate [23]. These observations have been recently complemented by AFM and STM imaging [16,28,29], directly demonstrating the semisolid behavior of the liquid layers. Our results using force-clamp spectroscopy add a new dimension to the study of the solvation phenomena, providing precise quantification of the equilibrium rupturereformation dynamics, which allow, for the first time, the reconstruction of the solvation free-energy landscape.…”

mentioning

confidence: 99%

Direct Observation of the Dynamics of Self-Assembly of Individual Solvation Layers in Molecularly Confined Liquids

Relat-Goberna

Garcia-Manyes

2015

Phys. Rev. Lett.

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Confined liquids organize in solidlike layers at the liquid-substrate interface. Here we use force-clamp spectroscopy AFM to capture the equilibrium dynamics between the broken and reformed states of an individual solvation layer in real time. Kinetic measurements demonstrate that the rupture of each individual solvation layer in structured liquids is driven by the rupture of a single interaction for 1-undecanol and by two interactions in the case of the ionic liquid ethylammonium nitrate. Our results provide a first description of the energy landscape governing the molecular motions that drive the packing and self-assembly of each individual liquid layer.

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mentioning

confidence: 99%

Direct Observation of the Dynamics of Self-Assembly of Individual Solvation Layers in Molecularly Confined Liquids

Relat-Goberna

Garcia-Manyes

2015

Phys. Rev. Lett.

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“…13 There was no sign of a contribution by the solute, stearic acid, or lignoceric acid. The absence of solute contributions is reasonable because of the low molar ratio of the solutes.…”

Section: Resultsmentioning

confidence: 96%

“…Hydrogen bonding and van der Waals interactions are probably responsible for projecting the structure of the adsorbed species into the solution, as suggested in our study of the decanol−graphite interface. 13 When liquid decanol is on top of the adsorbed solute, the OH groups of the former can form a hydrogen bond with the COOH group of the latter. The van der Waals interaction of the stacked alkyl chains provides an additional energy gain.…”

Section: Resultsmentioning

confidence: 99%

Competitive Adsorption on Graphite Investigated Using Frequency-Modulation Atomic Force Microscopy: Interfacial Liquid Structure Controlled by the Competition of Adsorbed Species

Hiasa

Ōnishi

2013

Langmuir

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The competitive adsorption of long-chain (C18 and C24) carboxylic acids versus n-decanol on graphite was investigated using frequency-modulation atomic force microscopy. A long-range-ordered monolayer of the solute (stearic acid or lignoceric acid) developed in saturated decanol solution, whereas an ordered decanol monolayer was deposited from dilute solutions. The piconewton-order tip-surface force was observed in solutions as a function of the vertical and lateral coordinates, together with the topography of the monolayers. The tip-surface force was periodically modulated, which was interpreted with a solution structure commensurate with the ordered assembly of adsorbed monolayers. These results show that the solution structure at the interface was controlled by the competitively adsorbed species and thus was sensitive to the composition of the bulk solution.

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“…Since 2010, FM-AFM has been used for visualizing vertical-2D or 3D force distributions at various solid-liquid interfaces [23,[25][26][27][28][29][30][31][32][33][34][35]. For interfaces between water and a rigid inorganic crystal, atomistic molecular dynamics (MD) simulation studies have been started towards detailed understanding of the imaging mechanism [?, [36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Advanced Instrumentation of Frequency Modulation AFM for Subnanometer-Scale 2D/3D Measurements at Solid-Liquid Interfaces

Fukuma

2015

Noncontact Atomic Force Microscopy

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Since the first demonstration of true atomic-resolution imaging by frequency modulation atomic force microscopy (FM-AFM) in liquid, the method has been used for imaging subnanometer-scale structures of various materials including minerals, biological systems and other organic molecules. Rencetly, there have been further advancements in the FM-AFM instrumentation. Three-dimensional (3D) force measurement techniques are proposed for visualizing 3D hydration structures formed at a solid-liquid interface. These methods further enabled to visualize 3D distributions of flexible surface structures at interfaces between soft materials and water. Furthermore, the fundamental performance such as force sensitivity and operation speed have been significantly improved using a small cantilever and highspeed phase detector. These technical advancements enabled direct visualization of atomic-scale interfacial phenomena at 1 frame/sec. In this chapter, these recent advancements in the FM-AFM instrumentation and their applications to the studies on various interfacial phenomena are presented.

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Cross-Sectional Structure of Liquid 1-Decanol over Graphite

Cited by 34 publications

References 31 publications

Direct Observation of the Dynamics of Self-Assembly of Individual Solvation Layers in Molecularly Confined Liquids

Direct Observation of the Dynamics of Self-Assembly of Individual Solvation Layers in Molecularly Confined Liquids

Competitive Adsorption on Graphite Investigated Using Frequency-Modulation Atomic Force Microscopy: Interfacial Liquid Structure Controlled by the Competition of Adsorbed Species

Advanced Instrumentation of Frequency Modulation AFM for Subnanometer-Scale 2D/3D Measurements at Solid-Liquid Interfaces

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