Abstracts of the CTTC 2019
<<< CTTC 2019 workshop main page
Slides available after the workshop
HOW TO UPLOAD YOUR ABSTRACT
In order to upload your abstract, you will need a valid login account.
Please contact us email and we will email you your login details.
Please be aware that the whole system has been reinitialized, so old accounts are not valid anymore.
CONTRIBUTORS: please add below, in your own section, your title talk and abstract :
- first : log in; (contact the organization for log in details or use the ones we provided in 2014 if you attended Vietnam)
- click on your name in the "Contents" box below, this will lead you to your own section;
- your section starts with your name as the title line, click on [edit] (far right).
- >>> How to insert a picture in your abstract
- INVITED SPEAKERS: Please upload your abstracts before 30st April 2019.
- POSTERS: If you wish to contributethe with a poster, feel free to follow the prescribed template in the Poster section . Please upload your abstracts before 30th April 2019.
All students are strongly encouraged to present a poster at the conference.
Frederik Tielens
Vrije Universiteit Brussel Faculteit Wetenschappen en Bio-ingenieurswetenschappen Pleinlaan 2, B-1050 Brussel, Belgium frederik.tielens@vub.be
Characterization of Self-Assembled Monolayers on Noble Metal Surfaces
Self-assembled monolayers (SAMs) consist of a layer of functionalized long-chain molecules tethered to a solid substrate. SAMs have attracted significant interest of both the fundamental and applied scientific communities. Their presence as a “coating” on a surface is attractive in a number of applications due to the possibility to provide tuning of the surface properties by selectively modifying functional groups on the SAM. Alkanethiols (CH3(CH2)nSH) and alkylthiolate radicals (CH3(CH2)nS∙) adsorption on Au(111) surface is one of the most studied and best-known SAM systems, but also other bioorganic molecules such as amino acids organize at the surface. The nature of the corresponding structure at the surface has been controversial for a long time, as well as other aspects such as the adsorption site on which the thiol chain is anchored, and if the thiol adsorbs by S-H bond breaking process or not. Experimental studies shed some light on both questions, indicating that surface thiol species are attached to Au adatoms, rather than Au atoms in such a bulk-terminated layer, and that it is the movement of these Au-adatom-thiolate moieties that order to produce the SAM structure. Still, some questions remain unsolved such as: At which coverage does this happen, and for which chain length? What is the influence of the presence of defect sites (vacancy and adatoms) on the S-H bond breaking process? The thiols adsorb in a laying down geometry at low coverage, but at which coverage do they straighten up or stand up? In this context we will show here a series of results on the characterization of alkyl thiol SAMs investigated in detail by means of periodic density functional calculations.
References I. Lorenzo Geada, I. Petit, M. Sulpizi and F. Tielens, Surf.Sci. 677 (2018) 271. E. Colombo, G. Belletti, F. Tielens, P. Quaino, Appl. Surf. Sci. 452, (2018) 141. S. Kumar Meena, C. Goldmann, D. Nassoko, M. Seydou, T. Marchandier, S. Moldovan, O. Ersen, F. Ribot, C. Chanéac, C. Sanchez, D. Portehault, F. Tielens, M. Sulpizi, ACS Nano, 11, 7371 (2017). D. Nassoko, M. Seydou, C. Goldmann, C. Chanéac, C. Sanchez, D. Portehault, F. Tielens, Materials Today Chemistry 5, 34, (2017). C. Goldmann, F. Ribot, L.F. Peiretti, P. Quaino, F. Tielens, C. Sanchez, C. Chanéac, D. Portehault, Small, 13, 1604028, (2017) H. Guesmi, N. Luque, E. Santos, F. Tielens, Chem.Eur.J, 23, 1402, (2017). D. Costa, C.-M. Pradier, F. Tielens, L. Savio, Surface Science Reports, 70, 449 (2015).
Sam Trickey
affiliation
Title
Abstract text here.
References
Speaker 2
affiliation
Title
Abstract text here.
References
Speaker 3
affiliation
Title
Abstract text here.
References
Speaker 4
affiliation
Title
Abstract text here.
References