Specialization: 011200 Physics
Program: Electronics of Nanosystems
Program manager: Prof. Dr. A. S. Shulakov
Department of Solid State Electronics 
Supervisor: Prof. Dr. A. S. Vinogradov
Referee: . Ph. D. Yu. S. Krivosenko

X-ray spectroscopy characterization of graphene nanoribbons grown on copper and gold crystals
Zagrebina Elena Mikhaylovna

The first X-ray spectroscopic investigation of bottom-up synthesis graphene nanoribbons (7-AGNRs) using molecules DBBA (10-10'-dibromo-9-9'-bianthracene, C28H16Br2) as precursor was carried out in present work.  Discussion and analysis of the results let to prove the possibility of formation of graphene nanoribbons 7-AGNRs on Cu(111) by thermally activated surface reactions (degalogenation, the formation of polymer chains, cyclodehydrogenation of polymer chains and final nanoribbons formation) of molecules DBBA (10-10 ' -dibromo-9-9'-bianthracene, C28H16Br2). The mechanisms of formation of polymer chains from the molecules DBBA, and then the graphene nanoribbons synthesis on various substrates Au(111) and Cu(111) were fixed as well as the temperatures of the main stages of the synthesis of 7-AGNRs. The present work demonstrates the substrate effect on the features and characteristics of the synthesis process.
	
The list of publications:
1. Elena M. Zagrebina, Alexander V. Generalov, Alexander Yu. Klyushin, Konstantin A. Simonov, Nikolay A. Vinogradov, Marc Dubois, Lawrence Frezet, Nils Martensson, Alexei B. Preobrajenski, and Alexander S. Vinogradov. Comparative NEXAFS, NMR, and FTIR Study of Nanodiamonds: As-Prepared and Fluorinated. J. Phys. Chem. C 119(1), 835–844 (2015).
2. A.V.  Generalov,  K.A.  Simonov,  N.A.  Vinogradov, E.M.  Zagrebina, N. Mårtensson, A.B.  Preobrajenski, and  A.S.  Vinogradov. Evolution of CuI/graphene/ Ni(111) system during vacuum annealing. J. Phys. Chem. C 119 (2015), DOI: 10.1021/acs.jpcc.5b02390
Publication Date (Web): May 22, 2015
3. Simonov, K. A., Vinogradov, N. A., Vinogradov, A. S., Generalov, A. V., Zagrebina, E. M., Martensson, N., Cafolla, A. A., Carpy, T. ,Cunniffe, J. P., and Preobrajenski, A. B.,  Effect of Substrate Chemistry on the Bottom-Up Fabrication of Graphene Nanoribbons: Combined Core-Level Spectroscopy and STM Study,  J. Phys. Chem. C 118, 12532 −12540 (2014)  .
4. Zagrebina E. Characterization of pristine and fluorinated nanodiamonds by X-ray absorption spectroscopy, International Student Conference “Science and Progress”, St. Petersburg – Peterhof, September, 30 - October, 4, 2013, р.8.
5. Zagrebina E.M., Generalov, Simonov K.A.,Vinogradov N.A., Dubois M., Preobrajenski A.B., and Vinogradov A.S. NEXAFS study of surface fluorinated nanodiamonds. Book of Abstracts of the International Conference ACNS’2013, July 01-05, 2013, St. Peterburg, Russia, p.204.