Skip to Main content Skip to Navigation
Journal articles

Deciphering the Adsorption Mechanisms of RGD Subunits: L-Aspartic Acid on Cu(110)

Abstract : In this work we present a detailed surface science characterization of L-Aspartic acid adsorption on a Cu(110) surface. We replaced the traditional sublimation method to obtain molecular films by dosing aspartic acid directly from an aqueous solution through an Electrospray Ionization (ESI) device. X-ray Photoelectron Spectroscopy (XPS) and Polarization Modulation Reflection Absorption Infra Red Spectroscopy (PM-RAIRS) evidenced different adsorption states ranging from sub-monolayer regime up to multilayers. Molecules-substrate interactions guide the creation of the pattern observed in the sub-monolayer, but molecule-molecule interactions are prevailing from a certain coverage stage, promoting the overlayer growth while leaving exposed areas of bare copper. This is evidenced by Scanning Tunneling Microscopy (STM) results, showing that single aspartic acid molecules self-organize in a 2D chiral network at low coverage and start originating new molecular layers even before a saturated monolayer has been reached.
Complete list of metadatas

Cited literature [26 references]  Display  Hide  Download
Contributor : Gestionnaire Hal-Upmc <>
Submitted on : Monday, July 10, 2017 - 11:30:17 AM
Last modification on : Tuesday, December 8, 2020 - 3:41:38 AM
Long-term archiving on: : Wednesday, January 24, 2018 - 6:53:52 PM


Files produced by the author(s)



Roberta Totani, Christophe Méthivier, Hervé Cruguel, Claire-Marie Pradier, Vincent Humblot. Deciphering the Adsorption Mechanisms of RGD Subunits: L-Aspartic Acid on Cu(110). Journal of Physical Chemistry C, American Chemical Society, 2017, 121 (29), pp.15842-15850. ⟨10.1021/acs.jpcc.7b04948⟩. ⟨hal-01558269⟩



Record views


Files downloads