Results
Summary 2012
In 2012 , the project was focused for the design ,smulation and fabrication of a coplanar waveguide on graphene (see SEM photo below)
We have measured the CPW waveguide in the range 0.04-110 GHz at various DC voltages in range -4V-+4V. We have see that the transmission is modified at various dc voltages. We have seen that the circuit corresponding to these measurements is an RC parallel circuit. The resitance is varying in the range 40-75 Ω while the capacitance is 200 fF. This demonstrate that graphene is a genuine matching circuit , in contrast to other nanomaterials having impedances of few Ωk.
Published ISI Papers
1.M.Dragoman, G.Konstantinidis, K. Tsagaraki, T. Kostopoulos, D.Dragoman and D. Neculoiu, Graphene-like metal-on-silicon field-effect transistor, Nanotechnology 23, 305201 (2012).
2.A. Radoi, M.Dragoman, A.Cismaru, G.Konstantinidis, and D.Dragoman, Self-powered microwave devices based on graphene ink decorated with gold nanoislands, J. Appl.Phys. 112, 064327 (2012).
3.M.Dragoman, D. Neculoiu, A.Cismaru, G.Deligeorgis, G. Konstantinidis, and D.Dragoman, Graphene nanoradio: Detecting radiowaves with a single atom sheet, Appl. Phys. Lett. 109, 033109 (2012).
For this paper we have received the letter below:
Dear D. Dragoman,
It is my privilege to inform you that your paper "Graphene radio: Detecting radiowaves with a single atom sheet " is included to the special edition (50th Anniversary) of Applied Physics Letters’ “Editor’s Picks”, as one of the most notable APL articles published in recent years. As such, your paper will be freely available to the community for a year (until the end of September 2013). A complete list of the highlighted articles can be found under: http://apl.aip.org/50th_anniversary_editors_picks
I would like to take this opportunity to thank you for your loyal support of our journal and I am looking forward to receiving more manuscripts with exciting science from your group in the near future.
Yours sincerely,
Stella Kafka, PhD,
APL Journal Manager
American Institute of Physics
2 Huntington Quadrangle, Suite 1NO1
Melville, NY 11747 USA
4. M.Dragoman, G. Deligeorgis, A.Muller, A.Cimaru, D.Neculoiu, G. Konstantinidis, D.Dragoman, A.Dinescu and F. Comanescu, Millimeter wave Schottky diode on graphene monolayer via symmetric metal contacts, J. Appl. Phys. 112, 084302 (2012).
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We have won an FP7 project :
“Carbon Based Smart Systems For wireless applications”, proiect FP7 STREP inceput Septembrie 2012.
http://project-nanorf.com/trt.html
which will drive beyond the researches in this project. The coordinator is Thales.
Mircea Dragoman is leading WP2 “Design of RF devices based on carbon nanotubes and graphene”