Annual Report 2012 - Latvijas Universitātes Cietvielu fizikas institūts

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DEPARTMENT OF PHOTONICS MATERIALS PHYSICS Head of Department Dr.habil.phys. D.Millers SOLID STATE RADIATION PHYSICS LABORATORY Head of laboratory Dr.habil.phys.L.Grigorjeva Research area and experimental setups The electronic properties of nanostructured materials were studied by time-resolved luminescence and absorbtion methods. Excitation sources: a pulsed electron beam accelerator (10 ns, 270 keV, 10 12 electrons/pulse), YAG:Nd and nitrogen lasers (266 nm, 337 nm, 532 nm). X ray was used for steady state luminescence spectra and radiation defect creation. FTIR absorption spectroscopy: EQUINOX 55 (10000-400 cm -1 and 22000-7000 cm -1 spectral regions) was developed for dispersed materials in wide temperature range. VIS-UV spectrometer LABOMED for 190-1100 nm was used for absorbsion measurements. Scientific Staff Dr.habil.phys. D.Millers Dr.habil.phys. L.Grigorjeva Dr.K.Smits Students J.Rikveilis V.Liepina M.Vanks L.Puķina A.Zoloterjevs Scientific Visits Abroad 1. Dr.habil.phys.L.Grigorjeva, Estonia (7 days) 2. Dr.K.Smits, USA, (7 days) 3. Dr.K.Smits, France (14 days) 4. Dr.Habil.phys. L.Grigorjeva, France (7 days) 5. Dr.Habil.phys. L.Grigorjeva, Greece (7 days) 6. Dr.Habil.phys. L.Grigorjeva, Germany (4 days) 7. Dr.Habil.phys. L.Grigorjeva, Germany (6 days) Cooperation Latvia Riga Technical University, Institute of Inorganic Chemistry (Dr.habil.sc.ing. J.Grabis). ZRF RITEC SIA (Dr.V.Ivanov). LU Institute of Microbioligy (M.Gavare, J.Liepiņš) 86
Estonia Institute of Physics, Tartu (Dr.S.Zazubovich) Russia GOI, St.Peterburg (Dr.L.Maksimov) Poland Institute of High Pressure Physics, PAN, Warszawa, Poland (Prof.W.Lojkowski,) France CNRS Processes, Material and Solar Energy Laboratory, (PROMES), Odeillo (Dr.C.Monty) Israel Prof. A.Gedanken, Bar-Ilan University, Ramat Gan. Main results PHOTOCATALYTIC EFFICIENCY STUDIES OF TiO 2 NANOPOWDES J.Rikveilis, L.Grigorjeva, D.Millers, K.Smits Experimental results showed that for photocatalytic activity the ratio of anatase to rutile phase has more significant role than the anatase grain size. The smaller grain size does not lead to greater performance, possible due to high concentration of surface defects and electron-hole recombination on surface. The doping of RE ions lead to anatase grain size decreasing and the photocatalytic activity decrease. THE LUMINESCENCE PROPERTIES OF PERSISTENT STRONTIUM ALUMINATE PHOSPHOR PREPARED BY SOLAR INDUCES SOLID STATE SYNTHESIS V.Liepina, K.Smits, D.Millers, L.Grigorjeva, C.Monty A novel method –solar induced solid state synthesis was carried out and luminescence properties of aluminate phosphor doped with Eu and Dy were studied. The persistent phosphor was obtained and its properties were compared with prepared by conventional solid state reaction. THE ELECTRON BEAM INDUCED SHORT LIVED ABSORPTION IN PLZT OPTICAL CERAMICS D.Millers, V.Dimza, L.Grigorjeva, M.Antonova, K.Smits, M.Livins The short lived absorption induced by a pulsed electron beam in the led-lanthaniumzirconate-titanate (PLZT) optical ceramic was studied. The measured absorption spectrum covers 1.1-2.9 eV energy range and consists of several strongly overlapping peaks. The rise of the absorption is delayed with respect to the excitation pulse, due to 87
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Institute of Solid State Physics Un
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CONTENTS Introduction 4 Department
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ORGANIZATIONAL STUCTURE OF THE ISSP
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The annual report summarizes the re
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The main source for international f
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lector at the Faculty of Physics an
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the samples having different phase
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LABORATORY OF MAGNETIC RESONANCE SP
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Scientific publications 1. U. Rogul
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Main investigations and results ALU
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Lectures on Conferences 28 th LU Sc
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Main Results LASER CRYSTALLIZATION
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CONTROLLED MANIPULATION AND MECHANI
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DEPARTMENT OF FERROELECTRICS Head o
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Belorussia 1. Institute of solid st
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Density and dielectric properties f
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CONCENTRATION AND THERMAL PHASE TRA
Page 35 and 36: Latvia; SSPA ”Scientific-Practica
Page 37 and 38: • Δ T εmax : Mn>Co>Fe>Cu~Ni •
Page 39 and 40: Li x Na 1-x Ta y Nb 1-y O 3 Solid S
Page 41 and 42: 34. А.И. Бурханов, И.Е.
Page 43 and 44: 16. Š. Svirskas, M. Ivanov, Š. Ba
Page 45 and 46: 45. С.Н. Каллаев, А.Р.
Page 47 and 48: LABORATORY OF VISUAL PERCEPTION Hea
Page 49 and 50: in terms of colour coordinate dispe
Page 51 and 52: 4. R.Truksa, S.Fomins, M.Ozolins, "
Page 53 and 54: Scientific visits abroad 1. Dr. hab
Page 55 and 56: experimental data. We focused on th
Page 57 and 58: GB1 with oxygen vacancy revealed th
Page 59 and 60: Fig. 4. The thermodynamic stability
Page 61 and 62: a supercell model was used, and the
Page 63 and 64: a) b) l [110] d [110] (001) Fig. 9.
Page 65 and 66: Drain CNT Source Drain GNR Source 5
Page 67 and 68: The oxygen incorporation energy for
Page 69 and 70: such as high thermal stability, ver
Page 71 and 72: STATISTICAL ANALYSIS AND CELLULAR A
Page 73 and 74: REGIONS OF AZIMUTHAL INSTABILITY IN
Page 75 and 76: 25. A. Gopejenko, Yu.F. Zhukovskii,
Page 77 and 78: 15. S. Piskunov and E. Spohr, "SrTi
Page 79 and 80: 43. P. Merzlakov, G. Zvejnieks, V.N
Page 81 and 82: XII. Annual Monitory Meeting of Eur
Page 83 and 84: 91. L. Shirmane, A.I. Popov, V. Pan
Page 85: 115. A.I. Popov, J. Zimmermann, V.
Page 89 and 90: 5. Grigorjeva L., Jankoviča D., Sm
Page 91 and 92: LABORATORY OF AMORPHOUS MATERIALS S
Page 93 and 94: Main results ABSORPTION AND LUMINES
Page 95 and 96: LUMINESCENCE OF FUSED AND UNFUSED B
Page 97 and 98: enables sensitive and selective det
Page 99 and 100: LABORATORY OF OPTICAL RECORDING Hea
Page 101 and 102: HOLOGRAPHIC LITHOGRAPHY IN AMORPHOU
Page 103 and 104: 5. U.Gertners, J.Teteris, The impac
Page 105 and 106: 24. J.Aleksejeva, J.Teteris, A.Tokm
Page 107 and 108: Israel Technion, Haifa (Dr.S.Stolya
Page 109 and 110: 3. A. Rusakova, J. Maniks, K. Schwa
Page 111 and 112: • Investigation of energetic stru
Page 113 and 114: Scheme 2 Synthesis of indane-1,3-di
Page 115 and 116: The synthesized compounds ZWK-1, DW
Page 117 and 118: 7. A. Vembris, K. Pudzs, I. Muzikan
Page 119 and 120: 20. A. Vembris, K. Pudzs, I. Muzika
Page 121 and 122: • Ion transfer problems related t
Page 123 and 124: 13. SIA „EMU PRIM”, 14. JSC „
Page 125 and 126: Main results Laboratory of Solid St
Page 127 and 128: Flax and Hemp Fiber Functionalizati
Page 129 and 130: CHARACTERIZATION OF LiFePO4/C COMPO
Page 131 and 132: Fig.1. Upper panel: 4 × 4 ×4 supe
Page 133 and 134: Fig.1. Left panel: Schematic view o
Page 135 and 136: Titania with anatase structure is i
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RESEARCH OF CATHODE MATERIALS FOR L
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17. T Dizhbite, J Ponomarenko, A An
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6. J. Kleperis, B. Sloka, J. Dimant
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33. P. Lesnicenoks, A. Sivars, L. G
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France 1. Institute Laue-Langevin,
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different neutron orbits (11/2[615]
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LABORATORY OF ELECTRONIC ENGINEERIN
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2. For JSC Augstsprieguma tīkls an
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4. By orders of several organizatio
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Partners: Fonons Ltd, Riga Technica
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Annual Report 2012 - Latvijas Universitātes Cietvielu fizikas institūts

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