Influence of Tail-Group Hydrogen Bonding on the Stabilities of Self-Assembled Monolayers of Alkylthiols on Gold

and, Elaine C. Meng; Leggett, Graham

doi:10.1021/la980795b

Cited by 116 publications

(142 citation statements)

References 34 publications

Supporting

Mentioning

129

Contrasting

Order By: Relevance

“…Heating this ordered overlayer can cause the individual strands of the formate to interact with each other on bending. The terminal H atoms can react with other terminal H atoms to form H 2 as has been observed in the study of self assembled monolayers [9][10][11]. We have observed coincident H 2 and CO 2 evolution at 440 K from an overlayer of formate species at 80 % of saturation [12], suggesting that the self assembled monolayer mechanism could operate under these conditions.…”

Section: Introductionsupporting

confidence: 72%

Postulate of a Mechanism for Temperature Programmed Reaction Spectroscopy (TPRS) Which Accounts for the Coincident Evolution of H2 and CO2 in the TPRS of Succinates and Formates Adsorbed on Cu: Description of a Novel Method for the Identification of the Surface Morphology of Cu on Supported Cu Catalysts

Waugh

2015

Catal Lett

View full text Add to dashboard Cite

The combination of temperature programmed reaction spectroscopy, temperature programmed oxidation (TPO) and N 2 O reactive frontal chromatography (N 2 O-RFC) has shown that the adsorbate produced by dosing dimethylsuccinate on to a Cu/Al 2 O 3 catalyst is a succinate species with 8 out of 10 surface Cu atoms having a succinate species adsorbed on them. The succinate species are bonded end-on and unidentate to the Cu atoms. This configuration constitutes a self-assembled monolayer. Temperature programming causes vicinal strands of the adsorbed succinate to interact, resulting in simultaneous dehydrogenation and decarboxylation, producing coincident evolution of H 2 and CO 2 in peaks at 668 and 793 K and leaving the C of the succinate chain on the Cu surface This C is removed by TPO, producing CO 2 at a peak maximum temperature of 593 K. Prior to the oxidation of the C to CO 2 , TPO oxidises the Cu metal to CuO in the temperature range 323-493 K. Reduction of this CuO produces Cu metal whose metal surface area as measured by N 2 O-RFC is 9.8 m 2 g -1 , a value which is identical to that of the fresh Cu/Al 2 O 3 catalyst. Therefore oxidation of the Cu metal to bulk CuO and re-reduction does not cause sintering of the Cu. However, the surface morphology of the Cu metal produced by reduction of the CuO has changed as evidenced by temperature programmed reduction (TPR)

show abstract

Section: Introductionsupporting

confidence: 72%

Postulate of a Mechanism for Temperature Programmed Reaction Spectroscopy (TPRS) Which Accounts for the Coincident Evolution of H2 and CO2 in the TPRS of Succinates and Formates Adsorbed on Cu: Description of a Novel Method for the Identification of the Surface Morphology of Cu on Supported Cu Catalysts

Waugh

2015

Catal Lett

View full text Add to dashboard Cite

show abstract

“…This explanation is supported by studies of Cooper and Leggett [31], who photopatterned SAMs of alkylthiols with polar terminal groups on gold are to produce structures that are stable against displacement by methyl-terminated thiols with longer alkyl chains. For example, MPA patterns are not eroded by octadecanethiol [31]. Our experiments are in agreement with these observations and the results suggest that the amount of DDT adsorbed by the exchange of MPA is negligible in comparison by the amount of DDT immobilization on bare gold areas which have been created deliberately by selective reductive desorption of MPA.…”

Section: Formation Of Mixed Monolayersmentioning

confidence: 80%

Microstructures by Selective Desorption of Self‐Assembled Monolayer from Polycrystalline Gold Electrodes

Strutwolf

O’Sullivan

2007

Electroanalysis

View full text Add to dashboard Cite

Potential-controlled partial reductive desorption of a self-assembled monolayer of mercaptopropionic acid (MPA) formed on polycrystalline gold electrodes is used to expose subdomains of bare gold to the electrolyte solution. Two sets of cathodic waves are observed in the reduction scan with MPA self-assembled on a polycrystalline gold electrode. The origin of the two waves is ambiguous but there are indications that the waves are correlated with reductive desorption from the (111) and then simultaneously (100) and (110) index faces of a polycrystalline gold electrode. Consecutive reduction scans with reversing the potential direction after the first peak (but before the onset of the second wave) results in disappearance of the first wave. The exposed domains are then blocked by an assembling process of longer chain alkanethiols to create a mixed self-assembled monolayer on polycrystalline gold electrodes. Desorption of the remaining MPA creates a partially blocked electrode and the blocking behavior towards hexacyanoferrate(III) is analyzed using the theory of partially blocked electrodes and indicates an array of interacting centers. The approach of partial reductive desorption may be exploited for use in biosensing applications where the exposed gold domains could be used for anchoring of DNA probes.

show abstract

“…Our data seems to have a relation with previous reports in which the authors observed that interaction between hydroxyl groups via hydrogen bonding leads to a higher stabilization of the self-assembled monolayer. 67,68 …”

Section: Application: Molecular Adsorption Sensingmentioning

confidence: 99%

High throughput optical readout of dense arrays of nanomechanical systems for sensing applications

Martínez¹,

Kosaka²,

Tamayo³

et al. 2010

Review of Scientific Instruments

View full text Add to dashboard Cite

A nano-cheese-cutter to directly measure interfacial adhesion of freestanding nano-fibers J. Appl. Phys. 111, 024315 (2012) Stabilization and growth of non-native nanocrystals at low and atmospheric pressures J. Chem. Phys. 136, 044703 (2012) Nanoparticle production in arc generated fireballs of granular silicon powder AIP Advances 2, 012126 (2012) Stability and topological transformations of liquid droplets on vapor-liquid-solid nanowires J. Appl. Phys. 111, 024302 (2012) Role of RuO3 for the formation of RuO2 nanorods Appl. Phys. Lett. 100, 033108 (2012) Additional information on Rev. Sci. Instrum. We present an instrument based on the scanning of a laser beam and the measurement of the reflected beam deflection that enables the readout of arrays of nanomechanical systems without limitation in the geometry of the sample, with high sensitivity and a spatial resolution of few micrometers. The measurement of nanoscale deformations on surfaces of cm 2 is performed automatically, with minimal need of user intervention for optical alignment. To exploit the capability of the instrument for high throughput biological and chemical sensing, we have designed and fabricated a two-dimensional array of 128 cantilevers. As a proof of concept, we measure the nanometer-scale bending of the 128 cantilevers, previously coated with a thin gold layer, induced by the adsorption and self-assembly on the gold surface of several self-assembled monolayers. The instrument is able to provide the static and dynamic responses of cantilevers with subnanometer resolution and at a rate of up to ten cantilevers per second. The instrumentation and the fabricated chip enable applications for the analysis of complex biological systems and for artificial olfaction.

show abstract

Influence of Tail-Group Hydrogen Bonding on the Stabilities of Self-Assembled Monolayers of Alkylthiols on Gold

Cited by 116 publications

References 34 publications

Microstructures by Selective Desorption of Self‐Assembled Monolayer from Polycrystalline Gold Electrodes

High throughput optical readout of dense arrays of nanomechanical systems for sensing applications

Contact Info

Product

Resources

About