http://www.cnr.it/ontology/cnr/individuo/prodotto/ID288007
Electrochemical fabrication of surface chemical gradients in thiol self-assembled monolayers with tailored work-functions (Articolo in rivista)
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- Label
- Electrochemical fabrication of surface chemical gradients in thiol self-assembled monolayers with tailored work-functions (Articolo in rivista) (literal)
- Anno
- 2014-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/la5013928 (literal)
- Alternative label
Fioravanti, Giulia; Lugli, Francesca; Gentili, Denis; Mucciante, Vittoria; Leonardi, Francesca; Pasquali, Luca; Liscio, Andrea; Murgia, Mauro; Zerbetto, Francesco; Cavallini, Massimiliano (2014)
Electrochemical fabrication of surface chemical gradients in thiol self-assembled monolayers with tailored work-functions
in Langmuir
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Fioravanti, Giulia; Lugli, Francesca; Gentili, Denis; Mucciante, Vittoria; Leonardi, Francesca; Pasquali, Luca; Liscio, Andrea; Murgia, Mauro; Zerbetto, Francesco; Cavallini, Massimiliano (literal)
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- Dipartimento di Scienze Fisiche e Chimiche, Università dell'Aquila, Via Vetoio 1, 67100 L'Aquila, Italy
Dipartimento di \"Chimica G. Ciamician\", Università di Bologna, V. F. Selmi 2, 40126 Bologna, Italy
Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), Consiglio Nazionale delle Ricerche (CNR), Via P. Gobetti 101, 40129 Bologna, Italy
Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via P. Gobetti 101, 40129 Bologna, Italy
Dipartimento di Ingegneria \"Enzo Ferrari\", Università di Modena e Reggio Emilia, Via Vignolese 905, 41125 Modena, Italy
CNR - Istituto Officina dei Materiali, S.S. 14, km 163.5 in Area Science Park, I-34012 Trieste, Italy
Department of Physics, University of Johannesburg, PO Box *S Supporting Information
524, Auckland Park, 2006, South Africa (literal)
- Titolo
- Electrochemical fabrication of surface chemical gradients in thiol self-assembled monolayers with tailored work-functions (literal)
- Abstract
- The studies on surface chemical gradients are constantly gaining interest both for fundamental studies and for technological implications in materials science, nanofluidics, dewetting, and biological systems. Here we report on a new approach that is very simple and very efficient, to fabricate surface chemical gradients of alkanethiols, which combines electrochemical desorption/partial readsorption, with the withdrawal of the surface from the solution. The gradient is then stabilized by adding a complementary thiol terminated with a hydroxyl group with a chain length comparable to desorbed thiols. This procedure allows us to fabricate a chemical gradient of the wetting properties and the substrate work-function along a few centimeters with a gradient slope higher than 5°/cm. Samples were characterized by cyclic voltammetry during desorption, static contact angle, XPS analysis, and Kelvin probe. Computer simulations based on the Dissipative Particle Dynamics methods were carried out considering a water droplet on a mixed SAM surface. The results help to rationalize the composition of the chemical gradient at different position on the Au surface. (literal)
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