Electrochemical grafting of organic coating onto gold surfaces: Influence of the electrochemical conditions on the grafting of nitrobenzene diazonium salt

Haccoun, J.; Vautrin-Ul, Christine; Chaussé, A.; Adenier, Alain

doi:10.1016/j.porgcoat.2008.04.001

Cited by 40 publications

(41 citation statements)

References 20 publications

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“…This latter may be explained by the presence of NO/NHOH redox systems that experienced different electronic environments due to the successive grafting. This last result is indicative of the formation of a thicker and non-homogeneous organic layer, which is in accordance with the work of Haccoun et al [37] who reported the structural characteristics of the grafted layer to be potential and grafting time dependent. Consequently it seems better to separate the grafting and the NO 2 reduction steps in order the functionalized electrode to be the most efficient.…”

Section: Influence Of Grafting Potentialsupporting

confidence: 92%

“…On the contrary Baranton and Belanger systematically noticed a first reduction peak distinct from that assigned to diazonium reduction [33,35]. Since the origin of this first peak remains unknown, many authors assumed both NBD grafting and NO 2 reduction reactions to occur simultaneously [3,30,31,[36][37][38]. Only very recently Cline et al [27] suggested a grafting process to occur at less cathodic potential although without providing further details on the grafted species.…”

Section: Introductionmentioning

confidence: 99%

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New insight into 4-nitrobenzene diazonium reduction process: Evidence for a grafting step distinct from NO2 electrochemical reactivity

Richard

Evrard

Gros

2012

Journal of Electroanalytical Chemistry

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International audienceElectrochemical and spectroscopic investigations were performed in order to clarify the mechanism of 4-nitrobenzene diazonium reduction on glassy carbon in protic medium. The number and nature of the electron transfer processes were found to be strongly correlated to the electrode surface state. On polished electrode two different reduction peaks were observed. Selective electrolyses realized at the corresponding potential definitely proved that the grafting process actually occurs at a potential distinct from NO2 electroreduction, this latter inducing the presence of the quasi-reversible NO/NHOH redox couple at the electrode surface. These results were confirmed by XPS analyses. Furthermore, voltammetric experiments using Fe(CN)63- showed that the electrochemical properties of the modified electrode strongly depend on the potential applied for grafting, which modulates the nitro group oxidation state. All the results suggested that the electrode functionalization was more efficient when grafting and NO2 reduction were performed separately

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Section: Influence Of Grafting Potentialsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

New insight into 4-nitrobenzene diazonium reduction process: Evidence for a grafting step distinct from NO2 electrochemical reactivity

Richard

Evrard

Gros

2012

Journal of Electroanalytical Chemistry

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“…Comparing the mass change of the 1st and 10th scans, an increase in mass of approximately 550 ng cm À2 is observed for a layer that blocks completely the reduction of the diazonium compound. This behaviour has been previously observed for the covalent grafting of gold with other aryldiazonium compounds [23,30,31]. The slow mass increase in the reverse scan has been attributed to the formation of charge-transfer complexes that precipitate on the electrode surface [40,55] but further growth from the radicals generated and diffusing to the electrode surface cannot be ruled out.…”

Section: Resultssupporting

confidence: 74%

Electrochemical properties of aryl-modified gold electrodes

Kullapere

Kozlova

Matisen

et al. 2010

Journal of Electroanalytical Chemistry

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“…A similar observation was reported in the case of paranitrobenzen diazonium molecules grafted also on Au. 27 …”

Section: Afm Study Of the Grafted Organic Filmmentioning

confidence: 99%

Tuning the thickness of electrochemically grafted layers in large area molecular junctions

Fluteau

Bessis

Barraud

et al. 2014

Journal of Applied Physics

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Electric double layer effect on observable characteristics of the tunnel current through a bridged electrochemical contact Fabrication and characterization of metal-molecule-silicon devices Appl. Phys. Lett. 91, 033508 (2007);We have investigated the thickness, the surface roughness, and the transport properties of oligo(1-(2-bisthienyl)benzene) (BTB) thin films grafted on evaporated Au electrodes, thanks to a diazonium-based electro-reduction process. The thickness of the organic film is tuned by varying the number of electrochemical cycles during the growth process. Atomic force microscopy measurements reveal the evolution of the thickness in the range of 2-27 nm. Its variation displays a linear dependence with the number of cycles followed by a saturation attributed to the insulating behavior of the organic films. Both ultrathin (2 nm) and thin (12 and 27 nm) large area BTB-based junctions have then been fabricated using standard CMOS processes and finally electrically characterized. The electronic responses are fully consistent with a tunneling barrier in case of ultrathin BTB film whereas a pronounced rectifying behavior is reported for thicker molecular films. V C 2014 AIP Publishing LLC. [http://dx.

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Electrochemical grafting of organic coating onto gold surfaces: Influence of the electrochemical conditions on the grafting of nitrobenzene diazonium salt

Cited by 40 publications

References 20 publications

New insight into 4-nitrobenzene diazonium reduction process: Evidence for a grafting step distinct from NO2 electrochemical reactivity

New insight into 4-nitrobenzene diazonium reduction process: Evidence for a grafting step distinct from NO2 electrochemical reactivity

Electrochemical properties of aryl-modified gold electrodes

Tuning the thickness of electrochemically grafted layers in large area molecular junctions

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