A two step process to form organothiol self-assembled monolayers on nickel surfaces

Rajalingam, S.; Devillers, Sébastien; Dehalle, Joseph; Mekhalif, Zineb

doi:10.1016/j.tsf.2012.08.036

Cited by 15 publications

(15 citation statements)

References 55 publications

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“…The top part of Figure shows the O 1s high-resolution XPS spectrum of an air oxidized (no plasma) sample. In agreement with previous reports, the total spectrum results from the contribution of different oxygen species present in the sample: bulk (O 2– , 529.6 eV), hydroxyl (OH – , 531.2 eV), and weakly bound oxygen species and contamination (532.9 eV). ,, …”

Section: Results and Discussionsupporting

confidence: 91%

“…In agreement with previous reports, the total spectrum results from the contribution of different oxygen species present in the sample: bulk (O 2− , 529.6 eV), hydroxyl (OH − , 531.2 eV), and weakly bound oxygen species and contamination (532.9 eV). 22,35,41 After the hydrogen plasma treatment, changes in the shape of the O 1s spectrum are evident, with an increase of the signal coming from hydroxyl groups at the expense of that of bulk oxygen. This is consistent with the transformation of some metal oxide into hydroxide species.…”

Section: Resultsmentioning

confidence: 99%

“…In order to obtain spintronic effects at room temperature, it will be desirable to substitute LSMO by a ferromagnet of higher T C , as, for example, FM metals, as cobalt, iron, nickel or their alloys. Note that surface functionalization of these metals remains almost unexplored. − …”

Section: Introductionmentioning

confidence: 99%

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Self-Assembled Monolayers on a Ferromagnetic Permalloy Surface

et al. 2015

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Self-assembled monolayers (SAMs) are nowadays broadly used as surface protectors or modifiers and play a key role in many technological applications. This has motivated the study of their formation in all kind of materials; however, and despite the current interest in molecular spintronics, the study of SAMs on ferromagnetic surfaces remains almost unexplored. In this paper, we report for the first time a methodology for the formation of SAMs of n-alkylphosphonic acids on permalloy in ambient conditions. The formed monolayers have been fully characterized by means of contact angle measurements, atomic force microscopy, X-ray photoelectron spectroscopy, matrix assisted laser desorption ionization time-of-flight mass spectrometry, infrared reflection absorption spectroscopy, and X-ray reflectometry. Additionally, the magnetic stability of the modified permalloy after the solution process required for the SAM formation has been confirmed by magneto-optical Kerr effect magnetometry. Moreover, by means of microcontact printing lithography, very accurate SAM patterns have been transferred onto permalloy surfaces and used as resist mask in a chemical etching process giving rise to submicrometric permalloy surface patterns with potential interest in nanomagnetism, spintronics, and storage technologies.

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Section: Results and Discussionsupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

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Self-Assembled Monolayers on a Ferromagnetic Permalloy Surface

et al. 2015

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“…Since the first reports on the formation of SAMs, monofunctionalized long alkane chains (C n H 2n+1 X; CnX through the rest of the text) have proven themselves as one of the preferred and most successful self-assembling units. 21,22 At the end of the chain, phosphonic acids (CnP) have been widely used for the functionalization of metal oxides, 21,22 while thiols (CnS) have been the common choice for the functionalization of coinage metals 23,24 and in some cases ferromagnetic metals like nickel [25][26][27][28][29][30] or cobalt. 28,31,32 SAMs have found wide application in different aspects of organic electronics.…”

Section: B Experiments With Self-assembled Monolayersmentioning

confidence: 99%

Recovering ferromagnetic metal surfaces to fully exploit chemistry in molecular spintronics

et al. 2015

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Organic spintronics is a new emerging field that promises to offer the full potential of chemistry to spintronics, as for example high versatility through chemical engineering and simple low cost processing. However, one key challenge that remains to be unlocked for further applications is the high incompatibility between spintronics key materials such as high Curie temperature Co, Ni, Fe (and their alloys) and wet chemistry. Indeed, the transition metal proneness to oxidation has so far hampered the integration of wet chemistry processes into the development of room temperature organic spintronics devices. As a result, they had mainly to rely on high vacuum physical processes, restraining the choice of available organic materials to a small set of sublimable molecules. In this letter, focusing on cobalt as an example, we show a wet chemistry method to easily and selectively recover a metallic surface from an air exposed oxidized surface for further integration into spintronics devices. The oxide etching process, using a glycolic acid based solution, proceeds without increasing the surface roughness and allows the retrieval of an oxygen-free chemically active cobalt layer. This unlocks the full potential of wet chemistry processes towards room temperature molecular spintronics with transition metals electrodes. We demonstrate this by the grafting of alkylthiols self-assembled monolayers on recovered oxidized cobalt surfaces. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx.

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“…[157][158][159] Electrochemical reduction at negative bias can play am ajor role in forming ac ompact molecular layer of controllable thickness.T he reduction of the adlayer oxide brings it back to the metallic form during simultaneous deposition of molecules. [160,161] In this context, Matrab et al reported that electrochemical reduction of an aryl diazonium derivative D 1 on aferromagnetic Fe electrode forms apolyphenylene layer, which can be functionalized by atom-transfer radical polymerization to give adensely packed poly(n-butyl methacrylate) layer (Figure 15). [162] This technique affords controllable polymerization and formation of ac ompact molecular layer of controllable thickness on the 16).…”

Section: Electrochemical Grafted Molecular Layers For Spintronic Studiesmentioning

confidence: 99%

Electrochemical Potential‐Driven High‐Throughput Molecular Electronic and Spintronic Devices: From Molecules to Applications

et al. 2021

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Molecules are fascinating candidates for constructing tunable and electrically conducting devices by the assembly of either a single molecule or an ensemble of molecules between two electrical contacts followed by current‐voltage (I‐V) analysis, which is often termed “molecular electronics”. Recently, there has been also an upsurge of interest in spin‐based electronics or spintronics across the molecules, which offer additional scope to create ultrafast responsive devices with less power consumption and lower heat generation using the intrinsic spin property rather than electronic charge. Researchers have been exploring this idea of utilizing organic molecules, organometallics, coordination complexes, polymers, and biomolecules (proteins, enzymes, oligopeptides, DNA) in integrating molecular electronics and spintronics devices. Although several methods exist to prepare molecular thin‐films on suitable electrodes, the electrochemical potential‐driven technique has emerged as highly efficient. In this Review we describe recent advances in the electrochemical potential driven growth of nanometric various molecular films on technologically relevant substrates, including non‐magnetic and magnetic electrodes to investigate the stimuli‐responsive charge and spin transport phenomena.

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A two step process to form organothiol self-assembled monolayers on nickel surfaces

Cited by 15 publications

References 55 publications

Self-Assembled Monolayers on a Ferromagnetic Permalloy Surface

Self-Assembled Monolayers on a Ferromagnetic Permalloy Surface

Recovering ferromagnetic metal surfaces to fully exploit chemistry in molecular spintronics

Electrochemical Potential‐Driven High‐Throughput Molecular Electronic and Spintronic Devices: From Molecules to Applications

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