Surface modification of materials: Electrografting of organic films

Pinson, Jean; Podvorica, Fetah I.

doi:10.1016/j.coelec.2020.05.016

Cited by 19 publications

(17 citation statements)

References 25 publications

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“…Several strategies have been successfully used in order to avoid such a multilayer growing. These approaches include molecular functionalization with bulky groups or the use of redox mediators or inhibitors [314,315].…”

Section: The Electrografting Techniquementioning

confidence: 99%

“…EG covers reductive and oxidative processes, depending on the organic compound, as was comprehensively described before by Bélanger and Pinson [312]. Since this methodology was developed [316], different functional groups have been used for surface modification, including aliphatic amines [99], aromatic amines [317], or diazonium salts [314,315].…”

Section: The Electrografting Techniquementioning

confidence: 99%

“…In the field of molecular electronics, widespread research concerns the modification of a bottom electrode (metals, carbon-based electrodes, hydrogenated silicon surfaces, etc.) by electrografting of diazonium salt derivatives [314,315,318,319]. One of the preferred methodologies to generate diazonium cations is the in situ diazotization of aromatic amines, as illustrated in Figure 4 [320].…”

Section: The Electrografting Techniquementioning

confidence: 99%

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Nanofabrication Techniques in Large-Area Molecular Electronic Devices

2020

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The societal impact of the electronics industry is enormous—not to mention how this industry impinges on the global economy. The foreseen limits of the current technology—technical, economic, and sustainability issues—open the door to the search for successor technologies. In this context, molecular electronics has emerged as a promising candidate that, at least in the short-term, will not likely replace our silicon-based electronics, but improve its performance through a nascent hybrid technology. Such technology will take advantage of both the small dimensions of the molecules and new functionalities resulting from the quantum effects that govern the properties at the molecular scale. An optimization of interface engineering and integration of molecules to form densely integrated individually addressable arrays of molecules are two crucial aspects in the molecular electronics field. These challenges should be met to establish the bridge between organic functional materials and hard electronics required for the incorporation of such hybrid technology in the market. In this review, the most advanced methods for fabricating large-area molecular electronic devices are presented, highlighting their advantages and limitations. Special emphasis is focused on bottom-up methodologies for the fabrication of well-ordered and tightly-packed monolayers onto the bottom electrode, followed by a description of the top-contact deposition methods so far used.

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Section: The Electrografting Techniquementioning

confidence: 99%

Section: The Electrografting Techniquementioning

confidence: 99%

Section: The Electrografting Techniquementioning

confidence: 99%

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Nanofabrication Techniques in Large-Area Molecular Electronic Devices

2020

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“…Despite the success of the aforementioned methodologies, strategies for facile, large‐scale, controllable and highly efficient CFG under ambient conditions are still an urgent need. [ 41 , 42 , 43 ] Here, we present a facile method under ambient conditions for the covalent modification of graphene with a grafting ink, which solely consists of a solvent and an aryl diazonium salt (Figure 1d ), rendering the patterning CFG by direct writing as easy as writing on paper (Figure 1e ). Dimethyl sulfoxide (DMSO) was selected as the solvent (vide infra).…”

Section: Introductionmentioning

confidence: 99%

Grafting Ink for Direct Writing: Solvation Activated Covalent Functionalization of Graphene

et al. 2022

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Covalent functionalization of graphene (CFG) has shown attractive advantages in tuning the electronic, mechanical, optical, and thermal properties of graphene. However, facile, large-scale, controllable, and highly efficient CFG remains challenging and often involves highly reactive and volatile compounds, requiring complex control of the reaction conditions. Here, a diazonium-based grafting ink consisting of only two components, i.e., an aryl diazonium salt and the solvent dimethyl sulfoxide (DMSO) is presented. The efficient functionalization is attributed to the combination of the solvation of the diazonium cations by DMSO and n-doping of graphene by DMSO, thereby promoting electron transfer (ET) from graphene to the diazonium cations, resulting in the generation of aryl radicals which subsequently react with the graphene. The grafting density of CFG is controlled by the reaction time and very high levels of functionalization, up to the failing of the Tuinstra-Koenig (T-K) relation, while the functionalization layer remains at monolayer height. The grafting ink, effective for days at room temperature, can be used at ambient conditions and renders the patterning CFG by direct writing as easy as writing on paper. In combination with thermal sample treatment, reversible functionalization is possible by subsequent writing/erasing cycles.

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“…Many researchers have worked on the graing of aryldiazonium salts on different electrode surfaces, and obtained satisfactory results. Among them we can mention the interesting studies conducted by Pinson [22][23][24][25][26][27][28][29][30][31] and Downard et al [32][33][34][35][36][37][38][39][40][41] In these published papers, the authors provided valuable information on the electrochemical reduction mechanism of aryldiazoniums in acetonitrile. Nevertheless, this study seeks to expand the frontiers of knowledge on some electrochemical properties of aryldiazonium salts in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%