http://www.cnr.it/ontology/cnr/individuo/prodotto/ID39945
Self-assembling peptides: a combined XPS and NEXAFS investigation on the structure of two dipeptides AlaGlu, AlaLys (Articolo in rivista)
- Type
- Label
- Self-assembling peptides: a combined XPS and NEXAFS investigation on the structure of two dipeptides AlaGlu, AlaLys (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Alternative label
Polzonetti G., Battocchio C., Dettin M., Gambaretto R., Di Bello C., Carravetta V., Monti S. Iucci G. (2008)
Self-assembling peptides: a combined XPS and NEXAFS investigation on the structure of two dipeptides AlaGlu, AlaLys
in Materials science & engineering. C, Biomimetic materials, sensors and systems (Print)
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- Polzonetti G., Battocchio C., Dettin M., Gambaretto R., Di Bello C., Carravetta V., Monti S. Iucci G. (literal)
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- Department of Physics and unità INFM, INSTM and CISDiC, University Roma Tre, Via della Vasca Navale, 84-00146 Rome, Italy
Department of Chemical Process Engineering, University of Padova, via Marzolo, 9-35131 Padova, Italy
CNRIPCF via Moruzzi 1, 56124 Pisa, Italy (literal)
- Titolo
- Self-assembling peptides: a combined XPS and NEXAFS investigation on the structure of two dipeptides AlaGlu, AlaLys (literal)
- Abstract
- The two dipeptides AE (L-alanine - L-glutamic acid ) and AK (L-alanine - L-lysine), that constitute the \"building blocks\" of the
16-unit self-complementary amphiphilic oligopeptide EAK16, have been investigated by XPS (X-ray photoelectron spectroscopy) and NEXAFS
(near edge X-ray absorption fine structure) spectroscopy. Thin films of both dipeptides on TiO2, a distinguished biocompatible surface
, were prepared by incubation from aqueous solutions. Thick films of dipeptides on inert Au substrates were also studied for comparison.
The chemical structure and composition were investigated by XPS spectroscopy; furthermore, molecular orientation of dipeptides on TiO2
was checked by angular dependent NEXAFS measurements at both C-K and N-K edges.
In order to yield some insight on adsorption geometry and molecular orientation MD (molecular dynamic) simulations were also carried out.
The performed molecular and electronic characterization of AE and AK provides an excellent model for the interpretation of more complex
peptide spectra. (literal)
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