Ene-like Reaction of Cyclopentene on Si(001)-2 × 1: An XPS and NEXAFS Study
The control and the understanding of single-molecule covalent coatings on silicon surfaces is increasingly important in designing nanoscale electrical elements, such as organic/inorganic semiconductor hybrid structures. In this respect, ordered arrays of cyclopentene deposited on Si(001)-2 × 1 appea...
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Published in | Journal of physical chemistry. C Vol. 116; no. 23; pp. 12680 - 12686 |
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Main Authors | , , , , , , , |
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American Chemical Society
14.06.2012
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Abstract | The control and the understanding of single-molecule covalent coatings on silicon surfaces is increasingly important in designing nanoscale electrical elements, such as organic/inorganic semiconductor hybrid structures. In this respect, ordered arrays of cyclopentene deposited on Si(001)-2 × 1 appear as promising buffer layers for further molecular crystal growth on the substrate. In this work, we examine the adsorption of cyclopentene on Si(001)-2 × 1 at 130 and 280 °C by means of C 1s XPS and NEXAFS. Until now cryogenic and room-temperature adsorption studies tended to prove that cyclopentene adsorption results from a formal cycloaddition ([2 + 2]-like) reaction of the CC double bond with a silicon dimer. Our XPS/NEXAFS study reveals that an ene-like reaction competes with the [2 + 2]-like reaction channel, leading to the formation of products bearing a CC bond, already at deposition temperature as low as ∼130 °C. This work helps to determine the optimum conditions leading to optimal chemical order in view of applications of cyclopentene as a buffer layer. |
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AbstractList | The control and the understanding of single-molecule covalent coatings on silicon surfaces is increasingly important in designing nanoscale electrical elements, such as organic/inorganic semiconductor hybrid structures. In this respect, ordered arrays of cyclopentene deposited on Si(001)-2 × 1 appear as promising buffer layers for further molecular crystal growth on the substrate. In this work, we examine the adsorption of cyclopentene on Si(001)-2 × 1 at 130 and 280 °C by means of C 1s XPS and NEXAFS. Until now cryogenic and room-temperature adsorption studies tended to prove that cyclopentene adsorption results from a formal cycloaddition ([2 + 2]-like) reaction of the CC double bond with a silicon dimer. Our XPS/NEXAFS study reveals that an ene-like reaction competes with the [2 + 2]-like reaction channel, leading to the formation of products bearing a CC bond, already at deposition temperature as low as ∼130 °C. This work helps to determine the optimum conditions leading to optimal chemical order in view of applications of cyclopentene as a buffer layer. |
Author | Silly, Mathieu Pierucci, Debora Tissot, Héloïse Khaliq, Anzar Gallet, Jean-Jacques Rochet, François Bournel, Fabrice Sirotti, Fausto |
AuthorAffiliation | Synchrotron SOLEIL Université Pierre et Marie Curie |
AuthorAffiliation_xml | – name: Université Pierre et Marie Curie – name: Synchrotron SOLEIL |
Author_xml | – sequence: 1 givenname: Anzar surname: Khaliq fullname: Khaliq, Anzar – sequence: 2 givenname: Debora surname: Pierucci fullname: Pierucci, Debora – sequence: 3 givenname: Héloïse surname: Tissot fullname: Tissot, Héloïse – sequence: 4 givenname: Jean-Jacques surname: Gallet fullname: Gallet, Jean-Jacques – sequence: 5 givenname: Fabrice surname: Bournel fullname: Bournel, Fabrice – sequence: 6 givenname: François surname: Rochet fullname: Rochet, François email: francois.rochet@upmc.fr – sequence: 7 givenname: Mathieu surname: Silly fullname: Silly, Mathieu – sequence: 8 givenname: Fausto surname: Sirotti fullname: Sirotti, Fausto |
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Title | Ene-like Reaction of Cyclopentene on Si(001)-2 × 1: An XPS and NEXAFS Study |
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