Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Nitrogen implantation of suspended graphene flakes: Annealing effects and selectivity of sp2 nitrogen species
Δημιουργός/Συγγραφέας:	Scardamaglia M. Aleman B. Amati M. Ewels C. Pochet P. Reckinger N. Colomer J.-F. Skaltsas T. [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos Snyders R. Gregoratti L. Bittencourt C.
Εκδότης:	Elsevier Ltd
Ημερομηνία:	2014
Γλώσσα:	Αγγλικά
ISSN:	0008-6223
DOI:	10.1016/j.carbon.2014.02.078
Περίληψη:	Nitrogen inclusion in both chemical vapour deposition and exfoliated few-layer graphene flakes was performed by nitrogen ion implantation in ultra-high vacuum. Inclusion of up to ∼20 at.% nitrogen can be reached through this clean technique with absence of oxygen species in the final product, while maintaining a largely sp2-carbon network. The nitrogen inclusion was observed by scanning X-ray photoelectron microscopy (SPEM) with energy resolution of 0.2 eV and spatial resolution of 10 nm. SPEM can be used to follow the evolution of nitrogen species: pyridinic, graphitic, and pyrrolic, at different doping stages and annealing temperatures. Variations in the ratio between sp2 nitrogen species was observed for increasing treatment time; annealing results in quenching of the sp3 component, suggesting the graphitic nitrogen as the most thermal stable species. The occurrence of graphitic species together with the absence of pyrrolic is indicative of N-incorporation into a hexagonal graphene-based lattice. Ion irradiation followed by annealing performed in a controlled way is a promising strategy to fine control the nature of the nitrogen species grafted to the graphene while focusing on selected applications.
Τίτλος πηγής δημοσίευσης:	Carbon
Τόμος/Κεφάλαιο:	73
Σελίδες:	371-381
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2014 Elsevier Ltd. All rights reserved.
Σημειώσεις:	2.4577.11; European Commission, EC; Agence Nationale de la Recherche, ANR; General Secretariat for Research and Technology, GSRT; European Regional Development Fund, FEDER: 447963 This work was partially funded by the Directorate of Research in Wallonia, under the scope of the ERA-NET MATERA programme and the Belgian Fund for Scientific Research (FRS-FNRS) under FRFC contract “Chemographene” (convention no. 2.4577.11). Partial financial support by the Greek General Secretariat for Research and Technology and the European Commission, through the European Fund for Regional Development, NSRF 2007-2013 action “Development of Research Centers – KPHΠIΣ”, project 447963 “New Multifunctional Nanostructured Materials and Devices – POLYNANO” is acknowledged. Support from the COST action MP0901 “NanoTP”.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο