Preparation of Self-Assembled Monolayers on InP

Gu, Yijun; Zhang, Lin; Butera, R. A.; Smentkowski, Vincent S.; Waldeck, David H.

doi:10.1021/la00006a003

Cited by 87 publications

(85 citation statements)

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“…It is possible to prepare homogenous and densely packed SAMs of alkanethiols on mercury via solution deposition, 72 -75 but not by vapor deposition. 76 Other substrates for thiol SAMs include nickel, 77,78 indium tin-oxide, 79 indium phosphide, 80 and a Tl-BaCu-O high-temperature superconductor. 81 …”

Section: Substrate Choice and Preparationmentioning

confidence: 99%

Self‐Assembled Monolayers on Electrodes

Finklea

2000

Encyclopedia of Analytical Chemistry

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Alkanethiols and related molecules spontaneously adsorb from solution or vapor phase onto oxide‐free metals, especially gold, to form close‐packed oriented monolayers. The ease and flexibility of the self‐assembly process provides a convenient method for altering the properties of the metal as an electrode. The close‐packed hydrocarbon layer blocks access of most solution species to the electrode surface. Consequently, interfacial capacitances are markedly reduced and most electron‐transfer reactions are strongly inhibited. The monolayers also provide a foundation for attachment of additional molecules or molecular layers to electrodes. Self‐assembled monolayers (SAMs) on electrodes have been used in voltammetric methods to improve the analytical sensitivity and to impart greater selectivity towards specific analytes. Redox molecules have been anchored at fixed and controllable distances from the electrode surface, thereby permitting the study of electron‐transfer kinetics over long distances and at large driving forces. The ability of SAMs to inhibit metal corrosion and to promote better adhesion of electroactive polymers has been demonstrated.

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Section: Substrate Choice and Preparationmentioning

confidence: 99%

Self‐Assembled Monolayers on Electrodes

Finklea

2000

Encyclopedia of Analytical Chemistry

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“…Similar studies on semiconductors are still very limited. To date, semiconductive substrates used for alkanethiols SAMs formation are InP [3][4][5][6], GaAs [7][8][9], and Ge [10].…”

Section: Introductionmentioning

confidence: 99%

On the Contrasting Effect Exerted by a Thin Layer of CdS against the Passivation of Silver Electrodes Coated with Thiols

et al. 2018

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Abstract:The passivation of metal electrodes covered by self-assembled monolayers of long-chain thiols is well known. The disappearance of the voltammetric peak of redox species in solution is a classical test for the formation of full layers of thiols. Similar studies on semiconductors are still very limited. We used silver surfaces covered by an ultrathin layer of CdS as substrate for self-assembling of n-hexadecanethiol (C 16 SH), and we compared the experimental results with those obtained by using the bare silver surface as substrate. The strong insulating effect of C 16 SH deposited on Ag(III) is shown by the inhibition of the voltammetric peak of Ru(NH 3 ) 6 3+/2+ . On the contrary, the voltammogram obtained on CdS-covered Ag(III) is very similar to that obtained on the bare Ag(III) electrode, thus suggesting that the presence of CdS exerts a contrasting effect on the passivation of the silver electrode. A crucial point of our work is to demonstrate the effective formation of C 16 SH monolayers on Ag(III) covered by CdS. The formation of full layers of C 16 SH was strongly suggested by the inhibition of the stripping peak of Cd from the CdS deposit covered by C 16 SH. The presence of C 16 SH was confirmed by electrochemical quartz crystal microbalance (EQCM) measurements as well as by Auger electron spectroscopy (AES) analysis.

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“…In recent years, forming SAMs on different surfaces, such as metallic, semiconductive, plastic substrates, so as to alter the interface properties, has attracted considerable attentions for biological/chemical sensing, molecule-based electronic devices, catalysis, photovoltaic devices, wetting control, and so on [2][3][4][5][6][7][8][9][10][11][12]. Generally, the molecules for forming SAMs have ''headgroups'' that adsorb or chemically bind onto substrates to form well-defined organic surfaces with alterable chemical functionalities at the other end being exposed to environment.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the molecules for forming SAMs have ''headgroups'' that adsorb or chemically bind onto substrates to form well-defined organic surfaces with alterable chemical functionalities at the other end being exposed to environment. To adapt to different substrates, various anchoring chemistries are needed [13], for example, the silanes for silica [9,14], alkanethiols for noble metals [15][16][17], and phosphates for metal oxides [18,19]. The restriction of these strategies is that these specific headgroups can only bind to the suitable substrates.…”

Section: Introductionmentioning

confidence: 99%