Rapid degradation of alkanethiol-based self-assembled monolayers on gold in ambient laboratory conditions

Willey, Trevor M.; Vance, Andrew L.; Buuren, T. van; Bostedt, Christoph; Terminello, Louis J.; Fadley, C. S.

doi:10.1016/j.susc.2004.12.022

Cited by 168 publications

(189 citation statements)

References 30 publications

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“…81,82 In our experiments, we must necessarily introduce the precursor. We established empirically that it was this which set the practical limits on the length of the safe working window in our experiments.…”

Section: Resultsmentioning

confidence: 99%

Dynamics of the Reaction of O(³P) Atoms with Alkylthiol Self-assembled Monolayers

et al. 2009

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We have studied the dynamics of the reactions of O( 3 P) atoms with alkylthiol self-assembled monolayers (SAMs). Superthermal O( 3 P) atoms, with a fairly broad distribution of laboratory-frame kinetic energies (mean ) 16 kJ mol -1 , fwhm ) 26 kJ mol -1 ), were generated by 355 nm photolysis of NO 2 introduced at a low pressure above the SAM surface. Nascent OH V′ ) 0 products were detected by laser-induced fluorescence. SAMs of two different alkyl chain lengths, C 6 and C 18 , were studied. The existence of SAM layers, and their robustness under our experimental conditions during the relevant measurement period, were confirmed by scanning-tunneling microscopy (STM). Reaction at the SAM surface was verified as the authentic source of the hydroxyl radicals using a perdeuterated C 6 D 13 -SAM sample. The OH appearance profiles as a function of photolysis-probe delay, and the rotational-state distributions at their peaks, were compared with those of liquid squalane (C 30 H 62 , 2,6,10,15,19,23-hexamethyltetracosane). The reactivity of the SAMs and of squalane was found to be comparable. We conclude that the O( 3 P) atoms must be able to access the more reactive secondary hydrogen atoms along the alkyl chains of the SAMs. We find no perceptible differences in reactivity or product energy disposal between the two SAM chain lengths. Both produce a substantial fraction of the OH with relatively high velocities, which must result from direct, impulsive reaction. There is also a slower component, with velocities consistent with a thermal, trapping-desorption mechanism. The proportion of this component appears to be lower for SAMs than for squalane. This would be compatible with the expected greater smoothness of the SAM surface at the molecular scale. We find little evidence for significant rotational excitation of the OH products, although the details of any correlation between translational and rotational energy release require further investigation. We compare our results with the limited available prior theoretical modeling of O( 3 P) + SAM systems.

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Section: Resultsmentioning

confidence: 99%

Dynamics of the Reaction of O(³P) Atoms with Alkylthiol Self-assembled Monolayers

et al. 2009

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“…Further, these studies illustrate that protein immobilization through Au-thiol self-assembled monolayers (SAMs) has better storage stability than might be expected. For example, rapid degradation on a time scale of hours to tens of hours has been reported for SAMs stored in air [40][41][42][43] and in cell culture media. 44 On the other hand, stability on a length scale of days to weeks has been reported for SAMs stored in aqueous solutions.…”

Section: )mentioning

confidence: 99%

Impedance Biosensor Incorporating a Carboxylate-Terminated Bidentate Thiol for Antibody Immobilization

Radhakrishnan¹,

Pali²,

Lee³

et al. 2016

J. Electrochem. Soc.

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“…21 Oxidation reduces the thiol's ability to bind to gold and severely affects the SAM stability. We therefore examined the effect on sintering of exposing films of 1-butanethiol-stabilized gold nanoparticles to ambient conditions.…”

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Rapid and Controllable Sintering of Gold Nanoparticle Inks at Room Temperature Using a Chemical Agent

et al. 2009

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We show that oxidation of protective thiol ligands and the exothermic reduction of surface area are important factors in the sintering of thiol-stabilized gold nanoparticle films. We also present a chemical treatment to achieve sintering of gold nanoparticles at room temperature. The process is facilitated by the remarkable enthalpy of reaction arising from the reduction of the surface area of the nanoparticles.

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Rapid degradation of alkanethiol-based self-assembled monolayers on gold in ambient laboratory conditions

Cited by 168 publications

References 30 publications

Dynamics of the Reaction of O(³P) Atoms with Alkylthiol Self-assembled Monolayers

Dynamics of the Reaction of O(³P) Atoms with Alkylthiol Self-assembled Monolayers

Impedance Biosensor Incorporating a Carboxylate-Terminated Bidentate Thiol for Antibody Immobilization

Rapid and Controllable Sintering of Gold Nanoparticle Inks at Room Temperature Using a Chemical Agent

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Rapid degradation of alkanethiol-based self-assembled monolayers on gold in ambient laboratory conditions

Cited by 168 publications

References 30 publications

Dynamics of the Reaction of O(3P) Atoms with Alkylthiol Self-assembled Monolayers

Dynamics of the Reaction of O(3P) Atoms with Alkylthiol Self-assembled Monolayers

Impedance Biosensor Incorporating a Carboxylate-Terminated Bidentate Thiol for Antibody Immobilization

Rapid and Controllable Sintering of Gold Nanoparticle Inks at Room Temperature Using a Chemical Agent

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Dynamics of the Reaction of O(³P) Atoms with Alkylthiol Self-assembled Monolayers

Dynamics of the Reaction of O(³P) Atoms with Alkylthiol Self-assembled Monolayers