Adsorption kinetics of alkanethiols studied by quartz crystal microbalance

Kim, H.J.; Kwak, Seon‐Yeong; Kim, Y.S.; Seo, Byung-Il; Kim, E.R.; Lee, H.

doi:10.1016/s0040-6090(98)00626-9

Cited by 27 publications

(17 citation statements)

References 23 publications

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“…The resulting stable films of chemisorbed alkylthiolates provide self-assembled monolayers (SAMs) which form the basis for many recipes for the organo-and biofunctionalization of gold surfaces [5][6][7][8][9][10]. Numerous studies have addressed the kinetics of their adsorption from liquid solutions [5,7,[11][12][13][14][15][16][17][18][19][20][21][22][23]], yet none have reported sticking probabilities.…”

Section: Sticking Probabilities In Adsorption From Liquid Solutions: mentioning

confidence: 99%

Sticking Probabilities in Adsorption from Liquid Solutions: Alkylthiols on Gold

Jung

Campbell

2000

Phys. Rev. Lett.

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The sticking probability, defined as the rate of adsorption per molecular collision with the surface, directly expresses the difficulty encountered by a molecule in scaling the barrier to adsorption. Its prior use has been restricted to adsorption of gases. A method extending this concept to adsorption from liquid solutions is applied to transient measurements of alkylthiol adsorption onto gold from ethanol solutions. The initial sticking probability increases from approximately 10(-8) to approximately 10(-6) with alkyl chain length, implying a stabilization of the transition state by approximately 0.65 kJ/mol per CH2. Since their sticking probabilities in the gas phase are approximately 1.0, the solvent increases the activation free energy by approximately 40 kJ/mol.

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Section: Sticking Probabilities In Adsorption From Liquid Solutions: mentioning

confidence: 99%

Sticking Probabilities in Adsorption from Liquid Solutions: Alkylthiols on Gold

Jung

Campbell

2000

Phys. Rev. Lett.

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“…For instance, hexane was used for investigating adsorption of cholesterol surfactants [14] and alkanethiols [15], and the adsorption of asphaltenes and resin [16] have been studied in heptane/toluene mixtures. The QCM technique has also been applied in studies using more viscous solutions like oils [17,18].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of fatty acids from alkane solution studied with quartz crystal microbalance

Lundgren

Persson²,

Kronberg³

et al. 2006

Tribol Lett

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This paper describes the adsorption of the unsaturated fatty acids, oleic-, linoleic-, and linolenic acid onto steel coated quartz crystal surfaces from 2,2,4,4,6,8,8-heptamethylnonane as monitored by the quartz crystal microbalance (QCM) technique. It is shown that addition of fatty acid to the oil results in changes in bulk density and viscosity and that these changes must be considered before the sensed mass can be evaluated. The change in viscosity of the solution is larger for oleic acid than for linoleic acid and linolenic acid, which results in a larger correction for oleic acid with respect to bulk effects. After considering the effects due to changes in bulk properties, the influence of the viscoelastic properties of the adsorbed layer on the sensed mass was evaluated. The correction for the viscoelastic properties of the adsorbed layer was found to be very small for the systems studied. The sensed mass, at 1.1 weight percent, ranged from 0.5 mg/m 2 for oleic acid to 5 mg/m 2 for linolenic acid.

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“…The surface acoustic wave devices are capable of detecting mass changes in the range of several nanograms [50,51]. They have been used to study the kinetics of monolayer adsorption and binding of molecules to SAMs [52,53].…”

Section: Non Electrochem Ical Techniquesmentioning

confidence: 99%