D.P.Kozlenko FLNP JINR, Dubna, Russia Joint Investigations of FLNP JINR and Research Institutes of the JINR Member States in the Area of Nanoscale Physics and Nanomaterials

Investigations of Nanosystems and Novel Materials by Neutron Scattering Methods Theme /2011 Physics of Nanosystems Structure and Dynamics of Functional Materials Complex Liquids and Polymers Molecular Biology and Pharmacology Structure of rocks and minerals Neutron Nanodiagnostics Engineering Diagnostics

Collaboration Belarus – BSU Czech Republic – IMC ASCR, NPI ASCR Poland – INP PAS, AMU Romania – CFATR RAS, HHNIPNE, NIRDIMT Russia – MSU, RRC KI, ISPM RAS Slovak Republic (CU) Ukraine - KNU Germany – GKSS, RUB, HZME Hungary – RISSP, KFKI RIPNP France – ILL Switzerland - PSI

Silicon glass doped by CeO 2 /TiO 2 : CeO 2 /TiO 2 doping effect Change of optical absorption coefficient Nanomaterials with controlled optical properties Measured SANS curves Pure glass Glass doped with molar concentration 2.0/6.5 CeO 2 /TiO 2 Glass doped with molar concentration 2.0/10 CeO 2 /TiO 2 R g = 34 nm 35 nm Formation of Ci-Ti-O aggregates, correlating with change of optical absorption FLNP JINR – RIPCP BSU (Belarus)

Size regulation effect in stabilization of ferrofluids M.V.Avdeev, D.Bica, L.Vekas, et al., J. Magn. Magn. Mater. (2007) M.V.Avdeev, D.Bica, L.Vekas, et al., J. Coll. Interface Sci. (2009) OA (  0 ~ Pa s) MA (  0 ~ 0.76 Pa s) Magnetorheological effect Collaboration: FLNP JINR Dubna – KNU Kyiv, Ukraine – CFATR Timisoara, NIRDIMT Cluj-Napoca, Romania – RISSP Budapest, Hungary - GKSS Geesthacht, Germany SANS Change in classical coating of magnetite in organic non-polar solvents ~8 nm~5 nm oleic acid (OA) C 18 H 34 O 2 palmitic acid (PA) C 16 H 32 O 2 myristic acid (MA) C 14 H 32 O 2 lauric acid (LA) C 12 H 32 O 2 stearic acid (SA) C 18 H 36 O 2

Analysis on magnetic properties, morphology and structure of ferrihydrite particles produced in vivo by Klebsiella oxytoca bacteria. Structural and magnetic investigations of biogenic ferrihydrite samples Joint Institute of Nuclear Research, Dubna; Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest; Siberian Federal University, Krasnoyarsk, Institute of Continuum Media Mechanics, Perm; Institute of Synthetic Polymer Materials RAS, Moscow; Institute of Physics, Siberian Branch of RAS, Krasnoyarsk; Institute of Macromolecular Chemistry, Prague; Research Institute for Solid State Physics and Optics, Budapest. SEM images of two samples containing ferrihydrite nanoparticles obtained by means of two different methods; sample Fe12 (a) and sample Fe34 (b). b)a) SAXS data from biogenic ferrihydrite (F12) dispersion sample. The parameters obtained from this fit are the cylinder radius R; and height L M. Balasoiu, et al., Romanian Journal of Physics Vol.55, Issues 7-8, 2010 Magnetization curves of Fe12 and Fe34 powders at different temperature experimental values T= 4.2K (1); 12K (2); 22K (3) and 33K (4). Lines represent the results of the calculations The micrograph of a Klebsiella oxytoca bacterium in a 15th day culture. Ǻ Ǻ Rod particle model Ǻ SANS data from biogenic ferrihydrite (F12) dispersion sample.

Cluster reorganization in polar fullerene solutions after water addition Collaboration: FLNP JINR Dubna – KNU, ISC NASU, Kyiv, Ukraine – RISSP Budapest, Hungary - GKSS Geesthacht, Germany V.L.Aksenov, M.V.Avdeev, O.A.Kyzyma, et al., Cryst. Rep. (2007) O.A.Kyzyma, L.A.Bulavin, V.L.Aksenov, et al., Fullerenes, Nanotubes and Carbon Nanostructures (2008) O.A.Kyzyma, M.V.Korobov, M.V.Avdeev, et al., Chem. Phys. Lett. (2010) initial old C 60 /NMP Н 2 О (> 40%) added after 4 weeks Н 2 О (> 40%) added after 3 weeks old C 60 /NMPC 60 /NMP/H 2 Ofresh C 60 /NMP SANS Solutions of C60 in N-methyl-pirrolidone (NMP) C 60 NMP (  = 32) Solubility 0.89 mg ml -1

Structure of protein apoferritin SAXS curve for apoferritin Model of quaternary structure of apoferritin obtained from results of protein crystallography. 130 А 3D model of apoferritin obtained from small angle scattering FLNP JINR - IMC ASCR, Czech Republic Function : Iron storage Immune response Oxidative Stress response Precursor in making iron nanoparticles Current investigations : Effect of different external conditions on protein structure (pH, salt concentration, temperature, bioactive substance) Mechanisms of Iron Uptake and Release Distance distribution function Radius of gyration50 Å Outer diameter130 Å Inner diameter80 Å SANS curve for apoferritin

Nanostructure of Multilayered Vesicles Unilamellar vesicles Multilamellar vesicles Stratum corneum is the outermost layer of the mammalian skin, exhibits the major skin barrier for drugs penetration. SRD patterns of multilayered vesicles SM/DPPC/DPPE in water, modeling mucous tunic of the human oral cavity Lamelar structure with periodicity 72,8 Å (1/1/1) 70,7 Å (1/2/1) 71,7 Å 1/2/2 FLNP JINR – RRC KI

Localization of End Groups in Dendrimers by SANS and SAXS Theoretical investigation of density distribution Experimental results by SANS and SAXS By SANS (Dubna) By SAXS (Prague) FLNP JINR - IMC ASCR, Czech Republic

Proximity effects in “superconductor/ferromagnet” layered nanostructures SC FM  New types of superconducting pairing (triplet condensate)  Modification of the superconducting and ferromagnetic order parameters  Applications for the spintronics Possible Cooper pairs polarization on the interface superconductor/ferromagnet Magnetization profiles Cu(32nm)/V(40nm)/Fe(1nm)/MgO Fe V V T>T C T < T C  Yu.N. Khaydukov, V.L. Aksenov, Yu.V. Nikitenko et al, J. of Superconductivity and Novel Magnetism 2010 (accepted); arXiv: z z Waveguide peak's width, dQ/Q, [%] FLNP JINR – RUB (Germany), KFKI RIPNP (Hungary), ILL (France)

Dynamics of H 2 adsorbed on nano-carbon materials FLNP JINR – INP PAS, AMU (Poland) Inelastic neutron scattering

Steel 40Х4G18F (Fe Mn V Cr C ) Steel 40Х4G18F (Fe Mn V Cr C ) The lattice parameter dependence for 40Х4G18F steel vs. annealing time at two temperatures: 600 о С и 700 о С. Comparison of neutron diffraction patterns for 40Х4G18F steel samples aged at 600 о С и 700 о С. Heat treatmentReinforced nanoparticls VC, nm Hardness HB, Kgf/mm 2 Microstrain, Quenching Quenching+ aging 600 o C, 12h 353 Quenching+ aging 700 o C, 12h 9  Formation of nanoparticles on quenching FLNP JINR – NPI ASCR (Czech Republic), PSI (Switzerland)

Summary FLNP JINR has an effective collaboration with a number of Research Institutes of the JINR Member States in the Area of Nanoscale Physics and Nanomaterials Application of neutron scattering methods provide important information on the properties of nanosystems, in particular, at structural level, which is essential for both fundamental and applied research in the area of nanoscale physics and nanomaterials, as well as for development of nanotechnologies.