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2020
1 Kalantzopoulos, Georgios N.; Lundvall, Fredrik; Thorshaug, Knut; Lind, Anna Maria; Vajeeston, Ponniah; Dovgaliuk, Iurii; Arstad, Bjørnar; Wragg, David; Fjellvåg, Helmer.
Factors Determining Microporous Material Stability in Water: The Curious Case of SAPO-37. Chemistry of Materials 2020 ;Volum 32.(4) s. 1495-1505
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2019
2 Bianchini, Federico; Fjellvåg, Helmer; Vajeeston, Ponniah.
Nonhexagonal Na Sublattice Reconstruction in the Super-Ionic Conductor Na2Zn2TeO6: Insights from Ab Initio Molecular Dynamics. Journal of Physical Chemistry C 2019 ;Volum 123.(8) s. 4654-4663
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3 Fjellvåg, Øystein; Krzystyniak, Matthew; Vajeeston, Ponniah; Sjåstad, Anja Olafsen; Armstrong, Jeff.
A combined deep inelastic neutron scattering andab initiolattice dynamics study of the hydride anion dynamics and bonding in La2LiHO3 oxyhydride. Journal of Physics Communications 2019 ;Volum 3.(10) s. -
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4 Fjellvåg, Øystein; Nygård, Kristin Hubred; Vajeeston, Ponniah; Sjåstad, Anja Olafsen.
Advances in the LiCl salt flux method and the preparation of phase pure La2−xNdxLiHO3 (0 ≤ x ≤ 2) oxyhydrides. Chemical Communications 2019 ;Volum 55.(26) s. 3817-3820
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5 Li, Xinyu; Bianchini, Federico; Wind, Julia; Vajeeston, Ponniah; Wragg, David; Fjellvåg, Helmer.
P2 Type Layered Solid-State Electrolyte Na2Zn2TeO6: Crystal Structure and Stacking Faults. Journal of the Electrochemical Society 2019 ;Volum 166.(15) s. A3830-A3837
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6 Rasukkannu, Murugesan; Velauthapillai, Dhayalan; Vajeeston, Ponniah.
First-Principle Calculation of High Absorption-TlGaTe2 for Photovoltaic Application. Materials 2019 ;Volum 12.(7) s. -
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7 Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah; Fjellvåg, Helmer.
Direct observation of reversible conversion and alloying reactions in a Bi2(MoO4)3-based lithium-ion battery anode. Journal of Materials Chemistry A 2019 ;Volum 7.(30) s. 17906-17913
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8 Vajeeston, Ponniah; Bianchini, Federico; Fjellvåg, Helmer.
First-Principles Study of the Structural Stability and Dynamic Properties of Li2MSiO4 (M = Mn, Co, Ni) Polymorphs. Energies 2019 ;Volum 12.(224) s. 1-24
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9 Wragg, David; Fjellvåg, Øystein; Ruud, Amund; Fjellvåg, Helmer; Vajeeston, Ponniah; Vaughan, Gavin B M; Di Michel, Marco; lebedev, Oleg; Sottmann, Jonas.
XRD/PDF computed tomography and how to get the best possible operando data from ion batteries. ESRF EBS Energy Materials Workshop; 2019-09-23 - 2019-09-25
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10 Wragg, David; Ruud, Amund; Fjellvåg, Helmer; Fjellvåg, Øystein; Vajeeston, Ponniah; Sottmann, Jonas; Di Michel, Marco; Vaughan, Gavin B M; lebedev, Oleg.
PDF Analysis of Batteries Using Diffraction Computed Tomography. Analysis of Diffraction data 2019; 2019-03-17 - 2019-03-22
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11 Wragg, David; Ruud, Amund; Fjellvåg, Øystein; Fjellvåg, Helmer; lebedev, Oleg; Di Michel, Marco; Sottmann, Jonas; Vajeeston, Ponniah; Vaughan, Gavin B M.
PDF Analysis of Batteries Using Diffraction Computed Tomography. India-Norway collaboration seminar; 2019-05-20 - 2019-05-22
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12 Yacov, Finkelstein; Raymond, Moreh; Bianchini, Federico; Vajeeston, Ponniah.
Anisotropy of the proton kinetic energy in ice Ih. Surface Science 2019 ;Volum 679. s. 174-179
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2018
13 Bianchini, Federico; Fjellvåg, Helmer; Vajeeston, Ponniah.
A first principle comparative study of the ionic diffusivity in LiAlO2 and NaAlO2 polymorphs for solid-state battery applications. Physical Chemistry, Chemical Physics - PCCP 2018 ;Volum 20.(15) s. 9824-9832
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14 Bianchini, Federico; Fjellvåg, Helmer; Vajeeston, Ponniah.
A first-principles investigation of the Li difusion mechanism in the super-ionic conductor lithium orthothioborate Li3BS3 structure. Materials letters (General ed.) 2018 ;Volum 219. s. 186-189
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15 Bianchini, Federico; Fjellvåg, Helmer; Vajeeston, Ponniah.
A first-principle study of NaMPO4(M = Mn, Fe, Co, Ni) possible novelstructures as cathode materials for sodium-ion batteries: Structural andelectrochemical characterisation. Materials Chemistry and Physics 2018 ;Volum 219. s. 212-221
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16 Eidsvåg, Håkon; Rasukkannu, Murugesan; Vajeeston, Ponniah; Velauthapillai, Dhayalan.
Bandgap engineering in CsSnxPb(1−x)I3 and their influence on light absorption. Materials letters (General ed.) 2018 ;Volum 218. s. 253-256
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17 El-Kharbachi, Abdelouahab; Hu, Yang; Yoshida, Koji; Vajeeston, Ponniah; Kim, Sangryun; Sørby, Magnus Helgerud; Orimo, Shin-Ichi; Fjellvåg, Helmer; Hauback, Bjørn.
Lithium ionic conduction in composites of Li(BH4)0.75I0.25 and amorphous 0.75Li2S·0.25P2S5 for battery applications. Electrochimica Acta 2018 ;Volum 278. s. 332-339
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18 El-Kharbachi, Abdelouahab; Høgset, A.; Kim, Sangryun; Vajeeston, Ponniah; Sørby, Magnus Helgerud; Fjellvåg, Helmer; Orimo, Shin-ichi; Hauback, Bjørn.
Structural and Electrochemical Study of Mixtures of Halogenated-LiBH4 and Amorphous 0.75Li2S·0.25P2S5 for Li- Conducting Solid Electrolytes. E-MRS Spring meeting 2018; 2018-06-18 - 2018-06-21
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19 Fjellvåg, Øystein Slagtern; Armstrong, Jeff; Vajeeston, Ponniah; Sjåstad, Anja Olafsen.
New Insights into Hydride Bonding, Dynamics, and Migration in La2LiHO3 Oxyhydride. The Journal of Physical Chemistry Letters 2018 s. 353-358
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20 Rasukkannu, Murugesan; Velauthapillai, Dhayalan; Bianchini, Federico; Vajeeston, Ponniah.
Properties of novel non-silicon materials for photovoltaic applications: A first-principle insight. Materials 2018 ;Volum 11:2006.(10) s. 1-17
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21 Rasukkannu, Murugesan; Velauthapillai, Dhayalan; Vajeeston, Ponniah.
A first-principle study of the electronic, mechanical and optical properties of inorganic perovskite Cs2SnI6 for intermediate-band solar cells. Materials letters (General ed.) 2018 ;Volum 218. s. 233-236
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22 Rasukkannu, Murugesan; Velauthapillai, Dhayalan; Vajeeston, Ponniah.
A promising high-efficiency photovoltaic alternative non-silicon material: A first-principle investigation. Scripta Materialia 2018 ;Volum 156. s. 134-137
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23 Rasukkannu, Murugesan; Velauthapillai, Dhayalan; Vajeeston, Ponniah.
Hybrid Density Functional Study of Au2Cs2I6, Ag2GeBaS4, Ag2ZnSnS4, and AgCuPO4 for the Intermediate Band Solar Cells. Energies 2018 ;Volum 11.(12) s. -
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24 Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah; Fjellvåg, Helmer.
Operando Investigations of Lithiation and Delithiation Processes in the BiVO4 Anode Material. Physical Chemistry, Chemical Physics - PCCP 2018 ;Volum 47. s. 29798-29803
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25 Vajeeston, Ponniah.
Ionic conductivity enhancement by particle size reduction in Li2FeSiO4. Materials letters (General ed.) 2018 ;Volum 218. s. 313-316
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26 Vajeeston, Ponniah; Fjellvåg, Helmer; Nilsen, Ola.
Search for potential precursors for Si-atomic layer deposition- a quantum chemical study. Materials letters (General ed.) 2018 ;Volum 216. s. 189-192
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27 Venkatachalapathy, Vishnukanthan; Vajeeston, Ponniah; Galeckas, Augustinas; Vines, Lasse; Kuznetsov, Andrej.
Direct and indirect bandgaps of Cadmium Oxide. 10th International Workshop on Zinc Oxide and Other Oxide Semiconductors; 2018-09-11 - 2018-09-14
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28 Wragg, David; Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah; Fjellvåg, Helmer; Fjellvåg, Øystein; Vaughan, Gavin B M; Di Michel, Marco.
New Anodes for Sodium and Lithium Ion Batteries. Time Work and Function 2018; 2018-06-13 - 2018-06-15
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29 Wragg, David; Sottmann, Jonas; Ruud, Amund; Fjellvåg, Helmer; Fjellvåg, Øystein; Vajeeston, Ponniah; Vaughan, Gavin; lebedev, Oleg; Di Michel, Marco.
Operando X-ray Diffraction Studies of Battery Materials. European Powder Diffraction Conference; 2018-07-01 - 2018-07-04
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2017
30 Bianchini, Federico; Fjellvåg, Helmer; Vajeeston, Ponniah.
First-principles study of the structural stability and electrochemical properties of Na2MSiO4 (M = Mn, Fe, Co and Ni) polymorphs. Physical Chemistry, Chemical Physics - PCCP 2017 ;Volum 19.(22) s. 14462-14470
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31 Hu, Yang; El-Kharbachi, Abdelouahab; Yoshida, Koji; Vajeeston, Ponniah; Sørby, Magnus Helgerud; Orimo, Shin-Ichi; Fjellvåg, Helmer; Hauback, Bjørn.
Ionic Properties of the borohydride-sulfide Mixed System for All-Solid Li-Ion Batteries. International Conference on Solid State Ionics (SSI-21); 2017-06-18 - 2017-06-23
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32 Lundvall, Fredrik; Wragg, David; Vajeeston, Ponniah; Dietzel, Pascal D.C.; Fjellvåg, Helmer.
Ab initio structure solution and thermal stability evaluation of a new Ca(II) 3D coordination polymer using synchrotron powder X-ray diffraction data. CrysteEngComm 2017 ;Volum 19.(39) s. 5857-5863
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33 Nagell, Marius Uv; Slawinski, Wojciech Andrzej; Vajeeston, Ponniah; Fjellvåg, Helmer; Sjåstad, Anja Olafsen.
Temperature induced transitions in La-4(Co1-xNix)(3)O-10 (+) (delta); oxygen stoichiometry and mobility. Solid State Ionics 2017 ;Volum 305. s. 7-15
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34 Rasukkannu, Murugesan; Velauthapillai, Dhayalan; Vajeeston, Ponniah.
Computational modeling of novel bulk materials for the intermediate-band solar cells. ACS Omega 2017 ;Volum 2.(4) s. 1454-1462
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35 Sottmann, Jonas; Di Michiel, Marco; Fjellvåg, Helmer; Malavasi, Lorenzo; Margadonna, Serena; Vajeeston, Ponniah; Vaughan, Gavin B M; Wragg, David.
Chemical Structures of Specific Sodium Ion Battery Components Determined by Operando Pair Distribution Function and X-ray Diffraction Computed Tomography. Angewandte Chemie International Edition 2017 ;Volum 56.(38) s. 11385-11389
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36 Sottmann, Jonas; Herrmann, Matthias; Vajeeston, Ponniah; Ruud, Amund; Drathen, Christina; Emerich, Hermann; Wragg, David; Fjellvåg, Helmer.
Bismuth Vanadate and Molybdate: Stable Alloying Anodes for Sodium-Ion Batteries. Chemistry of Materials 2017 ;Volum 29.(7) s. 2803-2810
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37 Vajeeston, Ponniah.
Computational materials design for energy harvesting and energy storage materials. International Symposium on Nanomaterials for clean energy and health applications; 2017-12-06 - 2017-12-08
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38 Vajeeston, Ponniah; Fjellvåg, Helmer.
Computational materials design and characterisation for energy harvesting and energy storage materials. 9th International conference on Materials for Advanced technologies; 2017-06-18 - 2017-06-23
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39 Vajeeston, Ponniah; Fjellvåg, Helmer.
First-principles study of structural stability, dynamical and mechanical properties of Li2FeSiO4 polymorphs. RSC Advances 2017 ;Volum 7.(27) s. 16843-16853
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40 Venkatachalapathy, Vishnukanthan; Ayedh, Hussein Mohammed Hussein; Vajeeston, Ponniah; Vines, Lasse; Monakhov, Edouard; Kuznetsov, Andrej.
Quest for Si based multi-junction solar cells covering the entire solar spectrum. International Symposium on Nanomaterials for clean energy and health applications; 2017-12-06 - 2017-12-08
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41 Venkatachalapathy, Vishnukanthan; Vajeeston, Ponniah; Vines, Lasse; Monakhov, Edouard; Kuznetsov, Andrej.
Ion irradiation induced phase transformation in crystalline Si. 29th International Conference on Defects in Semiconductors; 2017-07-31 - 2017-08-04
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42 Wragg, David; Sottmann, Jonas; Vajeeston, Ponniah; Ruud, Amund.
The intriguing mechanism of phosphorus anodes for sodium ion batteries Revealed by operando pair distribution function and X-ray diffraction computed tomography. ESRF Scientific advisory commitee; 2017-11-09 - 2017-11-10
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2016
43 Lundvall, Fredrik; Vajeeston, Ponniah; Wragg, David; Dietzel, Pascal D.C.; Fjellvåg, Helmer.
Two new series of coordination polymers and evaluation of their properties by density functional theory. Crystal Growth & Design 2016 ;Volum 16.(1) s. 339-346
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44 Sottmann, Jonas; Herrmann, Matthias; Vajeeston, Ponniah; Hu, Yang; Ruud, Amund; Drathen, Christina; Emerich, Hermann; Fjellvåg, Helmer; Wragg, David.
How Crystallite Size Controls the Reaction Path in Nonaqueous Metal Ion Batteries: The Example of Sodium Bismuth Alloying. Chemistry of Materials 2016 ;Volum 28.(8) s. 2750-2756
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45 Wragg, David; Sottmann, Jonas; Vajeeston, Ponniah; Emerich, Hermann; Fjellvåg, Helmer; Hermann, Matthias; Hu, Yang; Ruud, Amund; Drathen, Christina.
Size Matters: How crystallite size controls reaction path in the sodium bismuth anode system. European Powder Diffraction Conference 2016; 2016-06-12 - 2016-06-15
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46 Wragg, David; Sottmann, Jonas; Vajeeston, Ponniah; Sørby, Magnus Helgerud; Fjellvåg, Helmer.
Does the 3D Topological Dirac Semimetal Na3P Have More Than One Ground State?. Nordic Young Neutron Scatterers Network Meeting; 2016-11-09 - 2016-11-09
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2015
47 Iozzi, Maria Francesca; Vajeeston, Ponniah; Vidya, R.; Ravindran, Ponniah; Fjellvåg, Helmer.
Structural and electronic properties of transparent conducting delafossite: a comparison between the AgBO2 and CuBO2 families (B = Al, Ga, In and Sc, Y). RSC Advances 2015 ;Volum 5.(2) s. 1366-1377
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48 Rasakkannu, Muregesan; Vajeeston, Ponniah; Velauthapillai, Dhayalan.
Computational Modeling of New bulk materials for the Intermediate Band Solar cells. International Conference on Nano materials for Frontier Applications (ICNFA 2015); 2015-12-02 - 2015-12-04
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49 Sjåstad, Anja Olafsen; Andersen, Niels Højmark; Vajeeston, Ponniah; Karthikeyan, Jayakumar; Arstad, Bjørnar; Karlsson, Arne; Fjellvåg, Helmer.
On the Thermal Stability and Structures of Layered Double Hydroxides Mg1-xAlx(OH)2(NO3)x·mH2O (0.18 ≤ x ≤ 0.38). European Journal of Inorganic Chemistry 2015 ;Volum 2015.(10) s. 1775-1788
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50 Vajeeston, Ponniah; Fjellvåg, Helmer.
Computational materials design and characterisation for energy harvesting and energy storage materials. International Conference on Nanomaterials for Frontier Applications (ICNFA 2015); 2015-12-02 - 2015-12-04
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