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Emre Erdem
Mühendislik ve Doğa Bilimleri Fakültesi
Öğretim Üyesi
(216) 483 9881
Pozisyon

Öğretim Üyesi

Eğitim

Habilitation Degree (June 2017) University of Freiburg: 

Institute of Physical Chemistry, Freiburg Germany Thesis: Defect structures of nanoscale functional semiconductor materials probed by EPR spectroscopy

PhD in Physics (2001-2006) Leipzig University: 

Faculty of Physics and Geoscience, International Physics Studies Program, Leipzig GermanyThesis: Size effects in ferroelectric nanoparticles

MSc in Physics (1999-2001) Leipzig University: 

Faculty of Physics and Geoscience, International Physics Studies Program, Leipzig GermanyThesis:Preparation and Characterisation of Ferroelectric and Ferromagnetic Nanopowders and Polymeric Nanocomposites

BSc in Physics (1994-1998) Ankara University: 

Faculty of Science, Department of Physics, Ankara Turkey Thesis: Plasma oscillations and Landau damping

 

Araştırma Alanları

Ferroelektirk ve piezoelektrik malzemelerin sentezi ve karaterizasyonu, Lityum-iyon bataryaları ve süperkapasitörler için elektrot malzemelerin sentezi ve karakterizasyonu, süperkapasitor üretimi ve tasarımı, Raman, fotoluminisans, empedans spektrometresi, elektron paramanyetik rezonans (EPR) spektrometresi, metal oksit malzemelerin kristal alan teorisi hesaplamaları, seramikler, varistörler, süperiletken malzemeler ve alan etkili transistörlerin geliştirilmesi

Üyelikler

Editor-in-Chief (Experimental Results) Editorial Board Member (Nature Scientific Reports) Editorial Board Member (Turkish Journal of Physics) Associate Editor (International Journal of Applied Ceramic Technology)

Article
  • K. Wissel, S. Dasgupta, A. Benes, R. Schoch, M. Bauer, R. Witte, A. D. Fortes, E. Erdem, J. Rohrer, O. Clemens, Developing intercalation based anode materials for fluoride-ion batteries: Topochemical reduction of Sr2TiO3F2 via a hydride based defluorination process, in press: J. Mater Chem. A (2018)
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  • Ö. Ünal, R. Khodadust, E. G. Durmusoglu, E. Erdem, B. Yagci, E. Yurtsever, H. Yagci Acar, Discovery of an exceptionally fluorescence of polyethylenimine (PEI) when absorbed in situ on iron oxide nanocrystals, Macromolecular Chem. Phys. 219 (2018) 1700563
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  • S. Repp, E. Harputlu, S. Gürgen, N. Kremer, M. Castellano, F. Emen,  N. Pompe, J. Wörner, A. Hoffmann, R. Thomann, S. Weber, K. Ocakoglu, E. Erdem*, Synergetic effects of Fe3+ doped spinel Li4Ti5O12 nanoparticles on reduced graphene oxide for high surface electrode hybrid supercapacitors, Nanoscale 10 (2018) 1877-1884
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  • E. Erdem*, Defect induced p-type conductivity in ZnO at high temperature: EPR spectroscopy Nanoscale 9 (2017) 10983-10986
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  • R. Genc, M. Ö. Alas, E. Harputlu, S. Repp, N. Kremer, M. Castellano, S. G. Colak,  K. Ocakoglu, E. Erdem*, Evaluation of multi-coloured flourescent carbon-dots for their use in high capacitance hybrid supercapacitor, Scientific Reports  7 (2017) 11222
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  • S. Sanctis, N. Koslowski, R. Hoffmann, C. Guhl, E. Erdem, S. Weber, J. J. Schneider, Towards an understanding of thin film transistor performance in solution processed amorphous zinc-tin-oxide (ZTO) thin films, ACS Appl. Mater. & Interfaces 9 (2017) 21328-21337
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  • J. Koruza, E.  A. Patterson, J. Schultheiß, E. Erdem, W. Jo, J.-S Lee, J. Rödel Hardening behavior and highly enhanced mechanical quality factor in (K0.5Na0.5)NbO3-based ceramics, J. Eur. Ceram. Soc. 37 (2017) 2083-2089
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  • S. Repp, S. Weber E. Erdem*, Defect evolution of non-stoichiometric ZnO quantum dots, J. Phys. Chem. C 120 (2016) 25124-25130
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  • R. C. Hoffmann, S. Sanctis, E. Erdem, S. Weber, J. J. Schneider, ZnO nanoparticles from molecular single source precursors: Microwave-assisted synthesis, electrophoretic deposition and field-effect transistor properties at 250 °C J. Mater. Chem. C 4 (2016) 7345
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  • A. Bateni, E. Erdem*, S. Repp, S. Weber, M.Somer, Al-doped MgB2 materials studied by EPR and Raman spectroscopy, Appl. Phys. Lett. 108 (2016) 201601
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  • C. V. Pham, S. Repp, R. Thomann, M. Krueger, S. Weber, E. Erdem*, Charge transfer and surface defect healing within ZnO nanoparticle decorated graphene hybrid materials Nanoscale 8 (2016) 9682-9687
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  • S. Yildirimcan, K. Ocakoglu, S. Erat, F. M. Emen, S. Repp, E. Erdem*, Hydrothermal synthesis and defect structures in ZnO nanopowder, RSC Advances 6 (2016) 39511-39521
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  • T. Ruf, S. Repp, J. Urban, R.Thomann, E. Erdem*, Competing effects between intrinsic and extrinsic defects of pure and Mn-doped ZnO nanocrystals, J. Nanoparticle Research 18 (2016) 109
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  • M. Blömker, E. Erdem, S. Li, T. Frömling, S. Weber, A. Klein and J. Rödel, Defect structure in Copper and Vanadium doped piezoelectric 0.9(Bi0.5Na0.5)TiO3-0.1(Bi0.5K0.5)TiO3 ceramics, J. Amer Ceram. Soc.  99 (2016) 543-550
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  • H. Kaftelen, D. E. Kanar, S. Repp S. Weber, E. Erdem*, Investigation of MnO doped potassium-sodium niobate ((K,Na)NbO3) ceramics by EPR and impedance spectroscopic methods, Ferroelectrics 494 (2016) 11-18.
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  • S. Repp, E. Erdem*, Controlling the exciton energy of Zinc Oxide (ZnO) quantum dots by changing the confinement conditions, Spectrochim. Acta A 152 (2016) 637-644
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  • B. Yüksel Price, G. Hardal, M. Acikgöz, S. Repp, E. Erdem*, Effects of MnO doping on the electronic properties of Zinc Oxide: 406 GHz EPR spectroscopy and Newman superposition model analysis, J. Appl. Phys. 118 (2015) 175705
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  • J. J. Schneider, R. C. Hoffmann, M. Kaloumenos, D. Spiehl, S. Weber, E. Erdem, Microwave-assisted synthesis of tantalum (V) oxide nanoparticles: Synthesis, dielectric properties and electron spin resonance spectroscopic characterization of defect chemistry, Phys. Chem. Chem. Phys. 17 (2015) 31801
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  • A. Bateni, E. Erdem*, S. Repp, S. Acar, I. Kokal, W. Häßler, S. Weber, M.Somer, Electron paramagnetic resonance (EPR) and Raman spectroscopy studies on carbon doped MgB2 superconductor nanomaterials, J. Appl. Phys. 117 (2015) 153905
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  • E. Erdem*, Electron beam curing of CoFe2O4 nanoparticles, Hybrid Materials 2014 (2014) 62-70
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  • A. Bateni, S. Repp, R. Thomann, S. Acar, E. Erdem*, M.Somer, Defect structure of ultrafine MgB2 nanoparticles, Appl. Phys. Lett. 105 (2014) 202605
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  • P.V. Chuyen, M. Eck, C. V. Pham, S. Züfle, M. Neukom, M. Seßler, D. Scheuneman,  H. Borcher, S. Weber, E. Erdem, B. Ruhstaller, M. Krüger, Improved efficiency for bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot - graphene nanocomposites, Phys. Chem. Chem. Phys. 16 (2014) 12251-12260
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  • R. C. Hoffmann, M. Kaloumenos, E. Erdem, S. Weber, J. J. Schneider, Microwave assisted synthesis, characterization and dielectric properties of nanocrystalline zirconia, Eur. J. Inorg. Chem. 2014 (2014) 5554-5560
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  • E. Sapper, R. Dittmer, D. Damjanovic, E. Erdem, D. Keeble, W. Jo, T. Granzow and J. Rödel, Aging in the relaxor and ferroelectric state of Fe-doped (1-x)BNT-xBT piezoelectric ceramics, J. Appl. Phys. 116 (2014) 104102
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  • P.V. Chuyen, M. Krüger, M. Eck, S. Weber and E. Erdem*Comparative EPR investigation of functionalized multiwalled carbon nanotubes, graphene-oxide, reduced graphene oxide and CdSe quantum dot-reduced graphene oxide hybrid material, Appl. Phys. Lett. 104 (2014) 132102
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  • R. Baraki, P. Zierep, E. Erdem*, S. Weber and T. Granzow, Electron paramagnetic resonance (EPR) study of ZnO varistor material, J. Phys. Condens. Matter 26 (2014) 115801
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  • E. Erdem*, Microwave power, temperature, atmospheric and light dependence of intrinsic defects in ZnO nanoparticles: A study of electron paramagnetic resonance (EPR) spectroscopy, J. Alloys and Compounds 605 (2014) 34-44
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  • M. Acikgöz, M. D. Drahus, A. Ozarowski, H. van Tol, S. Weber and E. Erdem*, Local coordination of Fe3+ in ZnO nanoparticles: Multi-frequency EPR and Newman superposition model analysis, J. Phys. Condens. Matter 26 (2014) 155803
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  • H. Kaftelen, M. Tuncer, S. Tu, S. Repp, H. Göcmez, R. Thomann, S. Weber, E. Erdem*, Mn-substituted spinel Li4Ti5O12 materials studied by multifrequency EPR spectroscopy, J. Mater. Chem. A 1 (2013) 9973-9982
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  • R.-A. Eichel, E. Erdem, P. Jakes, A. Ozarowski, H. van Tol, R. C. Hoffmann and J. J. Schneider, Space charge layer, intrinsic”bulk”and surface complex defects in ZnO nanoparticles-A high field EPR analysis, Functional Materials Letters 6 (2013)1330004
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  • R. C. Hoffmann, M. Kaloumenos, S.Heinschke, E. Erdem, P. Jakes, R.-A. Eichel, J. Schneider, Molecular precursor derived and solution processed indium zinc oxide as semiconductor in a field-effect transistor device. Towards an improved understanding of semiconductor film composition, J. Mater. Chem. C 1 (2013) 2577-2584
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  • S. Schaab, M. Schulz, H. Fritze, R.-A. Eichel, E. Erdem, D. Rüscher, S. Hummelt, T. Granzow, Influence of reducing atmosphere on the defect chemistry of lead lanthanum zirconate titanate (8/65/35), Solid State Ionics 228 (2012) 56-63
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  • H. Kaftelen, K. Ocakoglu, S.Tu, R. Thomann, S. Weber, E. Erdem*, EPR and photoluminescence spectroscopy studies on the defect structure of ZnO nanocrystals, Phys. Rev. B 86 (2012) 114113
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  • E. Erdem, S. Schaab, W. Jo, A. Ozarowski,  H. van Tol, R.-A. Eichel, Multi-frequency EPR analysis of Manganese-Doped [Bi 0.5Na0.5]TiO3-BaTiO3 Ceramics, Ferroelectrics 428 (2012) 116-121
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  • S. K.S. Parashar, B.S. Murty, S. Repp, S. Weber, E. Erdem*, Investigation of Intrinsic Defects in Core-Shell Structured ZnO Nanocrystals, J. Appl. Phys.  111 (2012) 113712
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  •  M. D. Drahus, P. Jakes, E. Erdem, S. Schaab,  J. Chen, M. Ozerov, S. Zvyagin, D. M. Smyth, R.-A. Eichel, Manganese-doped (1 − x)BiScO3–xPbTiO3 high-temperature ferroelectrics: Defect structure and mechanism of enhanced electric resistivity, Phys. Rev. B 84 (2011) 064113
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  • A.K. Srivastava, M. Deepa, K.N. Sood, E. Erdem, R.-A.Eichel, Shape selective growth of ZnO nanostructures: spectral and electrochemical response, Adv. Mat. Lett. 2 (2011) 142-147
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  • W. Jo, J.-B. Ollagnier, J.-L. Park, O.-J. Kwon, C. Park, H.-H. Seo, J.-S. Lee, E. Erdem, R.-A. Eichel, J. Rödel, J. Eur. Cer. Soc. 31 (2011) 2107-2117
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  • P. Jakes, E. Erdem, A. Ozarowski, J. v. Tol, D. Mikhailova, H. Ehrenberg, R.-A. Eichel, Local coordination of Fe3+ in Li[Co0.98Fe0.02]O2 oxides as cathode material in lithium ion batteries - multi-frequency EPR and Newman-superposition analysis, Phys. Chem. Chem. Phys. 13 (2011) 9344-9352
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  • E. Aksel, P. Jakes, E. Erdem, A. Ozarowski, J. L. Jones, R.-A. Eichel, Processing of manganese-doped [Bi0.5Na0.5]TiO3 ferroelectrics – reduction and oxidation reactions during calcination and sintering, J. Am. Ceram. Soc. 94 (2011) 1363-1367
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  • M. D. Drahus, P. Jakes, E. Erdem, R.-A. Eichel, Defect structure of the Sr[Ti,Fe]Ox solid-solution system – change in iron oxidation states and defect complexation, Solid State Ionics 184 (2011) 47-51
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  • P. Jakes, E. Erdem, R.-A. Eichel, L. Jin, D. Damjanovic, Position of defects with respect to domain walls in Fe3+-doped PZT piezoelectric ceramics, Appl. Phys. Lett. 98 (2011) 072907
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  • P. Jakes, E. Erdem*, Finite size effects in ZnO nano-particles: An electron paramagnetic resonance (EPR) analysis, physica status solidi RRL 5 (2011) 56-58
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  • E. Erdem, P. Jakes, S. K. S. Parashar, K. Kiraz, M. Somer, A. Rüdiger, R.-A. Eichel, Defect structure in aliovalently-doped and isovalently-substituted ferroelectric PbTiO3 nano-powders, J. Phys. Condens. Matter 22 (2010) 345901-07
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  • E. Aksel, E. Erdem, P. Jakes, J. L. Jones, R.-A. Eichel, Defect structure and materials ‘hardening’ in Fe2O3-doped [Bi0.5Na0.5]TiO3 Ferroelectrics, Appl. Phys. Lett. 97 (2010) 012903
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  • W. Jo, E. Erdem, R.-A. Eichel, J. Glaum, T. Granzow, D. Damjanovic, J. Rödel, Effect of donor and acceptor dopants in (Bi1/2Na1/2)TiO3-BaTiO3-(K0.5Na0.5)NbO3 lead-free piezoceramics, J. Appl. Phys. 108 (2010) 014110
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  • E. Erdem, R.-A. Eichel, C. Fetzer, I. Dezsi, S. Lauterbach, H.-J. Kleebe, A. G. Balogh, Site of incorporation and solubility for Fe ions in acceptor-doped PZT ceramics, J. Appl. Phys. 107 (2010) 054109
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  • J. J. Schneider, R. C. Hoffmann, J. Engstler, E. Erdem, P. Jakes, R.-A. Eichel, L. Pitta-Bauermann, J. Bill, Molecular routes to monomodal zinc oxide nanoparticles. Synthesis, characterization and defect chemistry, Chem. Mater. 22 (2010) 2203-2212
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  • E. Erdem*, P. Jakes, R.-A. Eichel, D. C. Sinclair, M. Pasha, I. M. Reaney, Formation of  defect dipoles in BaTiO3 ceramics heat-treated under reduced oxygen  partial-pressure, Functional Materials Letters 3 (2010) 65-68
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  • E. Erdem, K. Kiraz, M. Somer, R.-A. Eichel, Size effects in Fe3+ -modifed PbTiO3 nanocrystals - formation and orientation of   defect-dipoles, J. Eur. Ceram. Soc. 30 (2010) 289-293
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  • R.-A. Eichel, M. D. Drahus, P. Jakes, E. Erünal, E. Erdem, S.K.S. Parashar, H.  Kungl,  M.J. Hoffmann, Defect structure and formation of defect dipoles in Cu2+-modified metal oxides derived from a spin-Hamiltonian parameter analysis, Molecular Physics 107 (2009) 1981-1986
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  • E. Erdem, V. Mass, A. Gembus, R.-A. Eichel, A. Schulz, V. L.-Kunzmann, R. Riedel, Defect states in lithium-doped polymer-derived SiCN ceramics characterized by Raman and electron paramagnetic resonance spectroscopy, Phys. Chem. Chem. Phys. 11 (2009) 5628-5633
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  • H.J. Kleebe, S. Lauterbach, L. Silvestroni, E. Erdem, H. Kungl, M.J. Hoffmann, R.-A. Eichel, Formation of magnetic grains in ferroelectric Pb[Zr0.6Ti0.4]O3 ceramics modified with Fe3+ above the solubility limit, Appl. Phys. Lett. 94 (2009) 142901
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  • J.J. Schneider, R. C. Hoffmann, J. Engstler, S. Dilfer, A.  Klyszcz, E. Erdem, P. Jakes, R.-A. Eichel, Zinc oxide derived from single source precursor chemistry under chimie douce conditions: formation pathway, defect chemistry and possible applications in thin film printing, J. Mater. Chem. 19 (2009)1449-1457
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  • L. Zhang, E. Erdem, Xiaobing Ren, R.-A. Eichel, Reorientation of defect dipoles in acceptor-modifed BaTiO3 single crystals – an electron paramagnetic resonance study, Appl. Phys. Lett. 93 (2008) 202901
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  • I. Menapace, G. Mera, R. Riedel, E. Erdem, R.-A. Eichel, A. Pauletti G. A. Appleby, Luminescence of heat-treated silicon-based polymers: promising materials for LED applications, J. Mater. Sci. 43 (2008) 5790-5796
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  • Comment: E. Erdem*, P. Jakes, Comment on the article: ‘‘Preparation and characterisation of nanocrystalline ZnO particles from a hydrothermal process’’, J. Nanoparticle Research 10 (2008) 1369
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  • E. Erdem, M. D. Drahus, R.-A. Eichel, H. Kungl, M.J. Hoffmann, A. Ozorowski, H. van Tol, L. C. Brunel, Defect structure in 'soft' (Gd,Fe)-codoped PZT 52.5/47.5 piezoelectric ceramics, Functional Materials Letters 1 (2008) 7-11
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  • E. Erdem, M. D. Drahus, R.-A. Eichel, H. Kungl, M.J. Hoffmann, A. Ozorowski, H. van Tol, L. C. Brunel, A. J. Bell, Manganese-modified PbTiO3 ferroelectrics – multi-frequency electron paramagnetic resonance and Newman superposition model analysis, Ferroelectrics 363 (2008) 39-49
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  • E. Erdem, R.-A. Eichel, H. Kungl, M.J. Hoffmann, A. Ozorowski, H. van Tol, L. C. Brunel, Characterisation of Fe-VO  defect dipoles in (La, Fe)-codoped PZT 52.5/47.5 piezoelectric ceramics by EPR, IEEE 55 (2008) 1061-1068
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  • E. Erdem*, A. Matthes, R. Böttcher, H. -J. Gläsel, E. Hartmann, Size effects in ferroelectric PbTiO3 nanomaterials observed by multi-frequency electron paramagnetic resonance spectroscopy, J. Nanosciences and  Nanotechnology 8 (2008) 702-716
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  • E. Erdem, R.-A. Eichel, H. Kungl, M.J. Hoffmann, A. Ozorowski, H. van Tol, L. C. Brunel, Local symmetry-reduction in tetragonal (La,Fe)-codoped Pb[Zr0.4Ti0.6]O3 piezoelectric ceramics, Phys. Scripta T129 (2007) 12-16
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  • R. Grigalaitis, J. Banys, S. Lapinskas, E. Erdem, R. Böttcher, H.-J. Gläsel, E. Hartmann, Dielectric investigations and theoretical calculations of size effect in PbTiO3 nanocrystals, IEEE 53 (2006) 2270-2274
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  • E. Erdem, H.C. Semmelhack,  R. Böttcher, H. Rumpf, J. Banys, A. Matthes, H. -J. Gläsel, D. Hirsch, E. Hartmann, Study of the tetragonal-to-cubic phase transition in PbTiO3 nanopowders, J. Phys. Condens. Matter 18 (2006) 3861-3874
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  • R. Grigalaitis, J. Banys, S. Lapinskas, E. Erdem, R. Böttcher, H.-J. Gläsel, E. Hartmann, Dielectric investigations and theoretical calculations of size effect in PbTiO3 nanocrystals, Materials Science Forum 514-516 (2006) 235-239
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  • E. Erdem, R. Böttcher, H. -J. Gläsel, E. Hartmann, Size effect in Cr doped PbTiO3 nanopowders observed by multifrequency EPR, Magn. Reson. Chem. 43 (2005) S174-182
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  • E. Erdem, R. Böttcher, H. -J. Gläsel, G. Klotzche, E. Hartmann, D. Michel, Size effects in BaTiO3 nanopowders studied by EPR and NMR, Ferroelectrics 316 (2005) 43-49
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  • R. Böttcher, E. Erdem, H. T. Langhammer, T. Müller, H.-P. Abicht, Incorporation of chromium into hexagonal barium titanate: An EPR study, J. Phys. Condens. Matter 17 (2005) 2763-2774
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  • E. Erdem, R. Böttcher, H. -C. Semmelhack, H. -J. Gläsel, E. Hartmann, Multi-frequency EPR study of Cr3+ doped lead titanate (PbTiO3) nanopowders, phys. stat. sol (b) 239 (2003) R7-9
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  • E. Erdem, R. Böttcher, H. -C. Semmelhack,  H. -J. Gläsel, E. Hartmann, D. Hirsch, Preparation of PbTiO3 ultrafine powders from combined polymerisation and pyrolysis route, J. Mater. Sci. 38 (2003) 3211-3217
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  • H. Rumpf, J. Hormes, H. Modrow, H.-J. Gläsel, E. Hartmann, E. Erdem, R. Böttcher, Preparation of nanocrystalline BaTiO3 characterised by in situ x-ray absorption spectroscopy, J. Phys. Chem. B 105 (2001) 3415-3421