Solid State NMR Group

Photo of the Group: (from left to right): Back Seats: Mr Orfanidis Savvas, Mr Subrati Ahmed, Mr Subrati Mohammed, Ms Gkoura Lydia, Mr Anastasiou Athanasios Front Seats: Dr. Fardis Michalis, Dr. Papavassiliou George, Dr. Karagianni Marina, Dr. Panopoulos Nikolaos

NMR Facility

4 Superconductive Magnets 100 MHz, 200 MHz (2), and 400 MHz Measurements 1.2K-
1000K, unique High Temperature NMR facility in Greece

Bruker 100 MHz NMR Spectrometer

Bruker 200 MHz NMR Spectrometer

Bruker 400 MHz NMR Spectrometer

Fabrication of State-of-the-Art Benchtop NMR Spectrometers for Outdoor Applications

  • Benchtop Broadband Solid State NMR operating in the frequency Range 2MHz-800MHz.
  • Portable Halbach Magnets for in-field applications
  • Full NMR Data Acquisition and Analysis software development

  • Dynamic 2D NMR measurements (T1 – T2, D – T2, T2 – Τ2) of fluids as a function of temperature
  • Self-diffusion coefficient measurements in:
  1. the Stray field of Superconductive Magnets
  2. Pulsed Field Gradient
  • Implementation of 1D and 2D Inversion Algorithms to acquire Relaxation Times/Diffusion Distribution

Research Activities

Research activities are mainly focused in the study of functionalized nanostructured materials in five different areas: (i) Two Dimensional Materials with Exotic Electronic Properties, such as Topological Insulators (ultrathin Bi2Se3 and Bi2Te3 nanoplateletes), single layer MoS2 on Graphene and CNTs, and Germanane (GeH). (ii) Complex transition metal oxides (magnetic and superconductive materials – strong electron correlations), (iii) Functionalized magnetic and photoactivated Transition Metal Oxide nanoparticles such as Fe2O3, Fe3O4, TiO2, etc. (iv) Contemporary Nanocatalysts for HER/OER, and HDS (such as MoS2, Ni2P, nanozeolites, etc.), (v) NMR studies of nanofluidity in porous systems with emphasis in carbon nanotubes, nanozeolites, as well as cement-based materials, industrial porous structures and oil-reservoir rock samples.

In addition:

(i) Development and application of solid state NMR methodologies in condensed matter systems. Measurements are performed in the temperature range 2K-1000K. The NMR studies are combined with other experimental techniques, such as XRD, Magnetic Measurements (PPMS, SQUID), Transmission Electron Microscopy (TEM), and Scanning Electron Microscopy (SEM).

(ii) Development of NMR Nanocrystallography: Combination of Density Functional Theory (DFT) calculations with NMR experiments in order to acquire the crystal and electronic structure of ultrafine nanoparticles. The method is implemented on Nanoscaled Materials which are at the forefront of Science and Technology (e.g. Topological Insulators and Topological Catalysts).

In the last five years there is very successful collaboration with excellent results among the ssNMR group of INN, the Chemical Engineering Department of Khalifa University at Abu Dhabi (UAE), Vanderbilt university (USA), the Korea Basic Science Institute at Daejeon (Korea) and the University of Ioannina (Greece). Work concerns (i) development and application of nanocatalysts in the Petroleum Industry (MoS2, Ni2P, and novel substrates), (ii) Implementation of Magnetic Nanoparticles for Reservoir Characterization (iii) Development of NMR methodologies for login oil reservoir applications.

Selected Publications

  •  “Polaron freezing and the quantum liquid-crystal phase in the ferromagnetic metallic La0.67Ca0.33MnO3”, N. Panopoulos, M. Pissas, H. J. Kim, Jin-Gyu Kim, S. J. Yoo, J. Hassan, Y. AlWahed, S. Alhassan, M. Fardis, N. Boukos, G. Papavassiliou, npj Quantum Materials Nature 3, 20 (2018)
  •  “NMR and EPR Structural Analysis and Stability Study of Inverse Vulcanized Sulfur Copolymers”, Vijay Kumar Shankarayya Wadi,Kishore K. Jena,Shahrukh Z. Khawaja, Konstantina Yannakopoulou, Michael Fardis,George Mitrikas, Marina Karagianni, Georgios Papavassiliou,and Saeed M. Alhassan*, ACS Omega 3, 3330−3339 (2018)
  • “Ultrafast Stratified Diffusion of Water Inside Carbon Nanotubes; Direct Experimental Evidence with 2D D–T2 NMR Spectroscopy”, J. Hassan, G. Diamantopoulos, L. Gkoura, M. Karagianni, S. Alhassan, S. V. Kumar, M. S. Katsiotis, T. Karagiannis, M. Fardis, N. Panopoulos, H. J. Kim, M. Beazi-Katsioti, and G. Papavassiliou, The Journal of Physical Chemistry C, ACS Publications  10.1021/acs.jpcc.8b01377 (2018)
  • “Facile MoS2 growth on reduced graphene-oxide via liquid phase method”, Vasileios Tzitzios, Konstantinos Dimos, Saeed M. Alhassan, Rohan Mishra, Antonios Kouloumpis, Dimitrios Gournis, Nikolaos Boukos, Manuel Roldan, Juan-Carlos Idrobo, Michael A. Karakassides, Georgia Basina, Yasser Alwahedi, Hae Jin Kim, Michael Fardis, Sokrates Pantelides and George Papavassiliou, Front. Mater. doi:10.3389/fmats.2018.00029 (2018)
  • “Iron-substituted cubic silsesquioxane pillared clays: Synthesis, characterization and acid catalytic activity”, Georgia Potsi, Athanasios K. Ladavos, Dimitrios Petrakis, Alexios P. Douvalis, Yiannis Sanakis, Marios S. Katsiotis, Georgios Papavassiliou, Saeed Alhassan, Dimitrios Gournis, and Petra Rudolf, Journal of Colloid and Interface Science 510, 395–406 (2018)
  •  “Iron-substituted cubic silsesquioxane pillared clays: Synthesis, characterization and acid catalytic activity”, Georgia Potsi, Athanasios K. Ladavos, Dimitrios Petrakis, Alexios P. Douvalis, Yiannis Sanakis, Marios S. Katsiotis, Georgios Papavassiliou, Saeed Alhassan, Dimitrios Gournis, and Petra Rudolf. Journal of Colloid and Interface Science 510, 395–406 (2018).
  • Unexpected orbital magnetism in Bi-rich Bi2Se3 nanoplatelets”.  H. J. Kim*, M. S.  Katsiotis, S. M. Alhassan, I. Zafiropoulou, M. Pissas, Y. Sanakis, G. Mitrikas, N. Panopoulos, N. Boukos, V. Tzitzios, M. Fardis, J-G. Kim, S-G. Lee, Y-M. Kim, S.J. Yoo, J.-H. Lee, A. Kouloumpis, D. Gournis, M.  Karakassides, G. Papavassiliou, Nature Publishing Group, Asia Materials 8, e271; am.2016.56 (2016).
  • “Water coordination, proton mobility and Lewis acidity in HY nanozeolites: A high temperature 1H and 27Al NMR study”, M.S. Katsiotis, M. Fardis, Y. AlWahedi, S. Stephen, V. Tzitzios, N. Boukos, H. J. Kim, S. Alhassan, and G. Papavassiliou. Journal of Physical Chemistry C 119(6), 3428-3438 (2015).
  • “Pore structure evolution and strength development of G-type elastic oil well cement. A combined 1H NMR and ultrasonic study”, E. Karakosta, L. Lagkaditi, S. ElHardalo, A. Biotaki c, V.C. Kelessidis, M. Fardis, G. Papavassiliou, Cement and Concrete Research 72, pp90–97 (2015).
  • “Attachment of Pseudomonas putida onto differently structured kaolinite minerals: A combined ATR-FTIR and 1H NMR study”,  I. A. Vasiliadou, D. Papoulis, C. V. Chrysikopoulos, D. Panagiotaras, E. Karakosta, M. Fardis, G. Papavassiliou. Colloids and Surfaces B: Biointerfaces 84, 354-9 (2011).
  • 139La NMR evidence for phase solitons in the ground state of overdoped manganites”, D. Koumoulis, N. Panopoulos, A. Reyes, M. Fardis, M. Pissas, A. Douvalis, T. Bakas, D. Argyriou and G. Papavassiliou. Phys. Rev. Letters 104, 077204 (2010).
  • “Spin order and lattice frustration in optimally doped manganites. A high temperature NMR study”, N. Panopoulos, D. Koumoulis, G. Diamantopoulos, M. Belesi, M. Fardis, M. Pissas, and G. Papavassiliou. Phys. Rev. B 82 (Editor’s suggestion), 235102 (2010).
  • “Photo-induced carbonation of lime-TiO2 mortars”, I. Karatasios, M. S. Katsiotis, V. Likodimos, A. Kontos, G. Papavassiliou, P. Falaras, V. Kilikoglou. Applied Catalysis B:  Environmental 95, 78-86 (2010).
  • “In situ monitoring of cement gel growth dynamics. Use of a miniaturized permanent Halbach magnet for precise 1H NMR studies”, E. Karakosta, G. Diamantopoulos, M. S. Katsiotis, M. Fardis, G. Papavassiliou, P. Pipilikaki, M. Protopapas, and D. Panagiotaras, Industrial and Engineering Chemistry Research 49, 613-622 (2010).