The Faculty of Physics at the University of Belgrade has around 73 professors and assistants working across 3 buildings. It has around 1000 students enrolled in its bachelor's, master's and PhD programs each year. The faculty focuses on basic and applied research in fields like nanoscience, materials science, condensed matter physics, lasers, plasma and meteorology. It has research centers in nanoscience and synthesis of nanostructures that collaborate internationally on projects.

1. FACULTY OF PHYSICS ФАКУЛТЕТ University of Belgrade www.ff.bg.ac.rs

2. BASICS

3. STUFF 73 professors and assistants 2 institutes: of physics of meteorology 3 building in the central area of Belgrade 9000 m 2 14 Labs 150 batchelor ( )+ 20 master + 30 Ph.D. students yearly; ~100 0 enrolled altogether

6. RESEARCH

9. CENTRES OF EXCELLENCE

13. www.nanolab.rs NanoLab Theory: Symmetry: Line Groups; Computing: POLSym (DFT, TBA) Systems: Nano- tubes, rods, wires, springs Experimental: nanotemplates, pyrometry

16. NanoLab Z. Popović B. Dakić I . Milošević E. Dobardžić Т. Vuković S. Dmitrović B. Nikolić M. Damnjanovic

17. Line Groups March 2010 (to appear)

18. Regular quasi-1D Systems DNA model ZnO nanospring SWCNT

19. Line groups PRB 25 (1982) 6987 Incommensurate and chiral groups are from the families 1 & 5 ZP=PZ arrangement and monomer symmetry are compatible L=Z P 13 infinite families

20. LG symmetric E(3) orbits PRB 47 (1993) 7805, Polymer 38 (1997) 4445, PRB 76 (2007) 0354391 15 classes: elementary monoperiodic systems

21. Diffraction patterns PRB 76 (2007) 0354391, pss (b) 246 (2009) 2631,

22. BANDS+ASSIGNATION PRB 65 (2002) 045418; JPA 36 (2003) 5707 ENERGIES: bands over BZ, assigned by m and Π. Time reversal: IBZ=[0, π ]. STATES: Symmetry adapted = generalized Bloch

24. Nanotubes: layer rolling PRB 75 (2007) 033404 For each diperiodic group (layer) and each chiral vector line group symmetry of the obtained nanotube is determined SWCNT 5 Chiral 80 13 Achiral 80

25. SSC 121 (2002) 471; PRB 68 (2003) 045408; 72 (2005) 085426; JPC 16 (2004) L505 (9,0) 285 cm -1 Radial Breathing Mode (8,2) 310 cm -1 (6,6) 275 cm -1 Nonradial components: z RBM ( D, θ )=(0.197 D -1 -0.167 D -3 )cos(3 θ ) ω [cm -1 ] = 2243/D [Ǻ] D characterized by Raman 0 A 0 +

26. OPTICAL CONDUCTIVITY PRB 62 (2000) 6971; 67 (2003) 165418; 69} (2004) 113408 Selection rules: ∆k=0, ∆m=0, σ v : Π f Π i ≠ -1, σ h , σ U : Π f Π i ≠ 1 Parallel polarization Identified zeolite grown tubes Dipole approximation Different selection rules for ∟ field = Dichroism

27. Plasmons RPA calculated dielectric function (transfer q < 1 Ǻ -1 ) Fit: q < 0.5 Ǻ -1 E p ~ q, q > 0.5 Ǻ -1 E p ~ q 2 PRB 77 (2008) 245415 Armchair: strong π plasmon peak (dispersion in q ) Semiconducting: π plasmon+ nondispersive optical

28. Pentaheptite SWCNTs Stone-Wales defect (bond rotation) 2(5+7) 57-tilings  57-CNTs 57CNTs mostly conductive while 6CNTs mostly semiconductive Electro-mechanical nanoswitch Mechanical stretching facilitates 57-transition PRB 76 (2007) 233414

29. [email_address] Δ D =(6.88±0.40) Å

30. Rigid layer modes EPJB 34 (2003) 409; NJP 5 (2003) 148; PRB 69 (2004) 153401 LRL(9,0)@(18,0) 0 A 0 - 36 cm -1 TWRL (5,5)@(10,10) 0 B 0 - 46 cm -1

32. W-W’ INTERACTION EPJB 34 (2003) 409; NJP 5 (2003) 148; PRB 69 (2004) 153401 Incommensurate walls: super-slippery Z-sliding: Goldstone Resonance: W-ring of integer W-W’ periods v m = v ∞ Low rotational corrugation