Neutron reflectivity studies of field driven transformations in a monolayer of 4-pentadecyl pyridine at Au electrode surfaces

Burgess, Ian J.; Zamlynny, Vlad; Szymański, G.; Schwan, Adrian L.; Faragher, Robert J.; Lipkowski, Jacek; Majewski, Jarosław; Satija, Sushil K.

doi:10.1016/s0022-0728(03)00292-4

Cited by 19 publications

(18 citation statements)

References 49 publications

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“…Because of the support by the flat electrode surface, the first few layers can assume a stratified structure. This has been confirmed for C15-Py films [9,12].…”

Section: Bilayer Formed By Two-successive Touching To Different Singlsupporting

confidence: 65%

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Voltammetric study of insoluble 4-pyridyl-terminated surfactant binary-component films prepared by multiple horizontal touching method on a Au(111) electrode

Uematsu

Sagara

2009

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Potential dependent behaviors and structures of binary-component bilayers and multiple layers of two different water-insoluble 4-pyridyl-terminated surfactants (C15-O-Py and C15-(C=O)-Py, see Fig. 1) on a Au(1 1 1) electrode were investigated by voltammetric techniques. Film preparation was based on repetitive horizontal touching of the electrode to the spread film of the surfactants at a gas/water interface. When bilayer formation was made by sequential touching to the neat spread films of the two different surfactants, the resultant bilayer structure was always of Au (1 1 1

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“…Because of the support by the flat electrode surface, the first few layers can assume a stratified structure. This has been confirmed for C15-Py films [9,12].…”

Section: Bilayer Formed By Two-successive Touching To Different Singlsupporting

confidence: 65%

“…Their behavior on the Au(1 1 1) electrode has been extensively described using the results of electrochemical and spectroscopic measurements [3,5,9,[11][12][13][14]. Several factors determining the behavior have been elucidated in our previous studies [13,14].…”

Section: Introductionmentioning

confidence: 99%

Voltammetric study of insoluble 4-pyridyl-terminated surfactant binary-component films prepared by multiple horizontal touching method on a Au(111) electrode

Uematsu

Sagara

2009

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Most relevant to the topic of corrosion are cells designed to accommodate simultaneous electrochemical measurements by incorporation of various electrodes into the cell so that structural data can be collected over a range Specialised neutron cells have also been custom-made for specific applications, such as extreme temperatures, pressures or for investigating systems under shear [39,40]. Most relevant to the topic of corrosion are cells designed to accommodate simultaneous electrochemical measurements by incorporation of various electrodes into the cell so that structural data can be collected over a range of potentials, for example [41][42][43][44][45]. Care must be taken to prevent the electrodes from contacting with the surface of interest, given the small volume of trough usually used, although larger cells that accommodate 'bulky' electrodes such as saturated calomel electrodes have also been used successfully [68].…”

Section: Methodsmentioning

confidence: 99%

“…In addition, neutrons are very penetrating, enabling the use of neutron-transparent windows. Hence, NR can be used to probe challenging systems in situ, including buried interfaces (under liquids) with samples under extreme conditions of temperature andpressure [36][37][38] and under external fields such as shear [39,40] and/or electrochemical potential [41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Neutron Reflectometry for Studying Corrosion and Corrosion Inhibition

Wood

Clarke

2017

Metals

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Neutron reflectometry is an extremely powerful technique to monitor chemical and morphological changes at interfaces at the angstrom-level. Its ability to characterise metal, oxide and organic layers simultaneously or separately and in situ makes it an excellent tool for fundamental studies of corrosion and particularly adsorbed corrosion inhibitors. However, apart from a small body of key studies, it has yet to be fully exploited in this area. We present here an outline of the experimental method with particular focus on its application to the study of corrosive systems. This is illustrated with recent examples from the literature addressing corrosion, inhibition and related phenomena.

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“…Being driven by the potential change, some of them clearly show dynamic and reversible structural changes including adsorption/desorption, reorientation, and formation/dissolution of the compact film. The potential-driven structural changes of adsorbed films have been so far demonstrated for dodecylsulfonate [1][2][3][4], octadecanoic acid [1,5,6], 12-(9-anthroyloxy) stearic acid [7], 1-octadecanol [1,6,[8][9][10][11][12][13][14][15]], 4-pentadecyl pyridine (C15-Py) [1,[16][17][18][19][20], phospholipids (dimyristoylphosphatidylcholine and dioleoylphosphatidylcholine) [1,[21][22][23][24][25][26][27][28][29]. Except for the conventional electrochemical methods, used to describe the molecular level details of the structural changes are scanning tunneling microscopy (STM) [2,3,27], atomic force microscopy (AFM) [2], and spectroelectrochemical methods (neutron scattering [4,18,19,28,29], fluorescence …”

Section: Introductionmentioning

confidence: 99%

Voltammetric study of adsorption layers of various 4-pyridyl terminated surfactants on a Au(111) electrode: Effects of electronic property of pyridyl group and intermolecular hydrogen bonding upon potential-driven phase changes

Uematsu

Sagara

2008

Journal of Electroanalytical Chemistry

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The major factors determining the potential-driven phase changes of the films of 4-pyridyl terminated water-insoluble neutral surfactants on a Au(111) electrode were described using the results of dc and ac voltammetric measurements. In total six surfactants were used to elucidate the effects of electronic property of the 4-pyridyl head group, hydrogen bonding ability between amide groups, direction of the amide bond, and bulkiness around the head group upon the potential dependent reorientation and adsorption-desorption processes.Comparison of the behavior of pentadecyl 4-pyridyl ether (C15-O-Py) and 1-pyridin-4-yl-hexadecan-1-one (C15-(C=O)-Py), possessing respectively, the highest and lowest excess electronic charge on the pyridyl nitrogen among the six surfactants, revealed that the latter exhibits more distinct reorientation of pyridyl group corresponding to phase transition between condensed and loose-packed states and narrower potential region of the compact film formation. Introduction of amide group in the alkyl chains of the surfactants reduced the packing of the adsorbed film in the potential region of the compact film formation, as evidenced by an increase of the differential capacitance. It was found that the existence of amide group facilitates the potential-driven phase transition of closely packed film from a condensed state to a loosely packed state, whereas it suppresses the transition of loosely packed film. The concomitant steric effect was also discussed.

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Neutron reflectivity studies of field driven transformations in a monolayer of 4-pentadecyl pyridine at Au electrode surfaces

Cited by 19 publications

References 49 publications

Voltammetric study of insoluble 4-pyridyl-terminated surfactant binary-component films prepared by multiple horizontal touching method on a Au(111) electrode

Voltammetric study of insoluble 4-pyridyl-terminated surfactant binary-component films prepared by multiple horizontal touching method on a Au(111) electrode

Neutron Reflectometry for Studying Corrosion and Corrosion Inhibition

Voltammetric study of adsorption layers of various 4-pyridyl terminated surfactants on a Au(111) electrode: Effects of electronic property of pyridyl group and intermolecular hydrogen bonding upon potential-driven phase changes

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