title: Spectroscopic evidence for neutral and anionic adsorption of (S)-glutamic acid on Ag(111).
abstract: We report here on a combined photoemission and vibrational spectroscopy investigation of (S)-glutamic acid adsorption on Ag(111). We show that, in the temperature range 250 K ≤ T ≤ 400 K, non-zwitterionic adsorption takes place and the anionic form prevails at nonvanishing coverage. Significant conformational changes of the self-assembled layer must occur above 300 K, corresponding to a substantial reduction of the sticking probability and a modification of the vibrational spectrum. The similarity of behavior with respect to glutamic acid adsorption on the previously investigated Ag(100) and Ag(110) surfaces is also discussed.
authors.affiliation: IMEM-CNR, Genova, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Smerieri
authors.forename: L
authors.initials: L
authors.lastname: Vattuone
authors.forename: M
authors.initials: M
authors.lastname: Rocca
authors.forename: L
authors.initials: L
authors.lastname: Savio
mesh_terms: D000327:Adsorption; D000838:Anions / Q000737:chemistry; D018698:Glutamic Acid / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013053:Spectrophotometry; D013499:Surface Properties; D014965:X-Rays
chemical_list: D000838:Anions; D018698:Glutamic Acid; D012834:Silver