XPS and electrochemical studies of ferrocene derivatives anchored on n- and p-Si(100) by Si–O or Si–C bonds

Dalchiele, Enrique A.; Aurora, Annalisa; Bernardini, Giovanni; Cattaruzza, Fabrizio; Flamini, Alberto; Pallavicini, Piersandro; Zanoni, R.; Decker, F.

doi:10.1016/j.jelechem.2005.02.002

Cited by 99 publications

(112 citation statements)

References 34 publications

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“…The general mechanism of these reactions involves the double bond addition to the Si-H surface, 9 where double bond homolytic cleavage is achieved by reaction with peroxides, 10 by UV irradiation, 11 by thermal activation, 12 by electrochemical processes, 13,14 or more recently, by white light irradiation. [15][16][17][18] The union of electroactive molecules on the silicon surface opens a new route for the making of hybrid devices, in which the properties of current silicon technology are combined with those of the molecules own. In the case of silicon, these hybrid components are ideal for Modification of Silicon Surface with Redox Molecules Derived from Ferrocene J. Braz.…”

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confidence: 99%

“…Commercially available ferrocene precursors as those used by Decker and co-workers, [15][16][17] and Li and co-workers [19][20][21] are scarce, limiting the number of the studied systems. A different route is followed by Fabre and Hauquier 22 who attach an amine-substituted ferrocene derivative to a pre-assembled acid-terminated alkyl monolayer through several chemical steps.…”

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confidence: 99%

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Modification of silicon surface with redox molecules derived from ferrocene

Riveros¹,

González²,

Chornik³

2010

J. Braz. Chem. Soc.

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Este estudo apresenta um método novo para ligar moléculas redox ativas derivadas de ferroceno à superfície de silicone monocristalino. O procedimento consiste na reação de silicone hidrogenado com brometo de alila ativado com luz branca e sua reação subseqüente com monolítio ferroceno para criar uma união covalente entre a molécula redox e a superficie do semicondutor. As camadas formadas são eletroquimicamente ativas e apresentam um processo electroquímico quasi-reversível, atribuído às moléculas de ferroceno ligadas à superfície de silicone. A análise por espectroscopia fotoeletrônica de raios-X (XPS) confirma a presença de moléculas de ferroceno na superficie de silicone.This study presents a new method to bind active redox molecules derived of ferrocene to the surface of single crystal silicon. The procedure consists in the reaction of hydrogenated silicon with allyl bromide activated with white light and its subsequent reaction with monolithio ferrocene in order to create a covalent union between the redox molecule and the semiconductor surface. The layers formed are electrochemically active and present a quasireversible electrochemical process which is attributed to the ferrocene molecules which are bound to the silicon surface. X-ray photoelectron spectroscopy (XPS) analysis confirms the presence of ferrocene molecules on the silicon surface.Keyword: silicon, ferrocene, surface modification, characterization IntroductionAlthough molecular electronics appears as a new alternative in the development of nanometric electronic devices, 1 the production of transistors and other electronic devices is still dominated by silicon technology. Contributions to the transition between both technologies centered in the development of hybrid semiconductormolecule materials are therefore of paramount importance. 2In this field, there are several studies referring to the preparation and redox property studies of self-assembled monolayers (SAMs) on silicon surfaces. The formation of SAMs on oxidized silicon surfaces has been well documented.3-5 However, the Si-O bond is in general unfavorable for electronic applications because of a generally poor molecule-electrode electron transfer. Much better results are obtained in absence of the oxide layer through a direct Si-C union linkage. 6The formation of the Si-C bond has been usually performed by ultra high vacuum (UHV) techniques, 7-9 or by radicalary processes.3,9 The latter have been studied more thoroughly due to the relatively low operation cost. The general mechanism of these reactions involves the double bond addition to the Si-H surface, 9 where double bond homolytic cleavage is achieved by reaction with peroxides, 10 by UV irradiation, 11 by thermal activation, 12 by electrochemical processes, 13,14 or more recently, by white light irradiation. [15][16][17][18] The union of electroactive molecules on the silicon surface opens a new route for the making of hybrid devices, in which the properties of current silicon technology are combined with those of the molecules own...

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confidence: 99%

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confidence: 99%

Modification of silicon surface with redox molecules derived from ferrocene

Riveros¹,

González²,

Chornik³

2010

J. Braz. Chem. Soc.

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“…It is now possible to form monolayers with various linking groups, including SiÀC, SiÀO, and SiÀN. [14][15][16] Among them, the formation of SiÀC-bound organic layers through hydrosilylation on the hydrogen-terminated silicon (henceforth referred to as Si À H) substrate has been the most intensively studied. The Si À C bond can be formed with or without radical initiators through thermal treatment, [17,18] photochemical methods, [19,20] or utilizing Lewis acid catalysts.…”

Section: Si à C-bound Organic Monolayers and Their Functionalizationmentioning

confidence: 99%

Click Chemistry‐Based Functionalization on Non‐Oxidized Silicon Substrates

Cai

2011

Chemistry An Asian Journal

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Copper-catalyzed azide-alkyne cycloaddition (CuAAC), combined with the chemical stability of the SiÀC-bound organic layer, serves as an efficient tool for the modification of silicon substrates, particularly for the immobilization of complex biomolecules. This review covers recent advances in the preparation of alkynyl-or azido-terminated "clickable" platforms on non-oxidized silicon and their further derivatization by means of the CuAAC reaction. The exploitation of these "click"-functionalized organic thin films as model surfaces to study many biological events was also addressed, as they are directly relevant to the on-going effort of creating siliconbased molecular electronics and chemical/biomolecular sensors.

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“…To date most of the research effort has been toward the preparation of either ferrocene-or phorphyrin-based redox architectures [7][8][9][10][11][12][13]. While on the one hand modular (i.e.…”

Section: Introductionmentioning

confidence: 99%

Silicon (100) surfaces modified by osmium bipyridine complexes

Ciampi

Lai

Gooding

2010

2010 International Conference on Nanoscience and Nanotechnology

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Tethered osmium bypiridine-pyridine complexes [Os(bpy)2Clpy-R] were prepared from chemically modified non-oxidized silicon (100) electrodes. Pyridinyl groups at the distal end of self-assembled monolayers (SAMs)-modified silicon surfaces were used to coordinatively bind a representative osmium bipyridil complex precursor [Os(bpy)2Cl2]. SAMs presenting the putative osmium ligand were prepared by a step-wise procedure using click reactions of acetylene-terminated alkyl monolayers and isonicotinic acid azide derivatives. The redox properties of the modified Si(100) electrodes were characterized using cyclic voltammetry. 2010 IEEE. . SAMs presenting the putative osmium ligand were prepared by a stepwise procedure using 'click' reactions of acetylene-terminated alkyl monolayers and isonicotinic acid azide derivatives. The redox properties of the modified Si(100) electrodes were characterized using cyclic voltammetry.

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XPS and electrochemical studies of ferrocene derivatives anchored on n- and p-Si(100) by Si–O or Si–C bonds

Cited by 99 publications

References 34 publications

Modification of silicon surface with redox molecules derived from ferrocene

Modification of silicon surface with redox molecules derived from ferrocene

Click Chemistry‐Based Functionalization on Non‐Oxidized Silicon Substrates

Silicon (100) surfaces modified by osmium bipyridine complexes

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