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Publications of Angelika Pretorius
Articles in journal, book chapters
  1. J. Falta, Th. Schmidt, S. Gangopadhyay, Chr. Schulz, S. Kuhr, N. Berner, J. I. Flege, A. Pretorius, A. Rosenauer, K. Sebald, H. Lohmeyer, J. Gutowski, S. Figge, T. Yamaguchi, and D. Hommel. Cleaning and growth morphology of GaN and InGaN surfaces. physica status solidi (b), 248(8):1800-1809, 2011. ISSN: 1521-3951. [doi:10.1002/pssb.201046574] Keyword(s): chemical analysis, scanning tunneling microscopy, quantum dots, X-ray photoemission spectroscopy.


  2. M. Florian, F. Jahnke, A. Pretorius, A. Rosenauer, H. Dartsch, C. Kruse, and D. Hommel. Influence of growth imperfections on optical properties of nitride pillar VCSEL microcavities. physica status solidi (b), 248(8):1867-1870, 2011. ISSN: 1521-3951. [doi:10.1002/pssb.201147159] Keyword(s): lasers, laser diodes, microcavities, optical properties, III-V semiconductors.


  3. Angelika Pretorius, Thomas Schmidt, Timo Aschenbrenner, Tomohiro Yamaguchi, Christian Kübel, Knut Müller, Heiko Dartsch, Detlef Hommel, Jens Falta, and Andreas Rosenauer. Microstructural and compositional analyses of GaN based nanostructures. Physica Status Solidi, 248:1822-1836, 2011. [doi:10.1002/pssb.201147175]


  4. Th. Schmidt, M. Siebert, J. I. Flege, S. Figge, S. Gangopadhyay, A. Pretorius, T.-L. Lee, J. Zegenhagen, L. Gregoratti, A. Barinov, A. Rosenauer, D. Hommel, and J. Falta. Mg and Si dopant incorporation and segregation in GaN. physica status solidi (b), 248(8):1810-1821, 2011. ISSN: 1521-3951. [doi:10.1002/pssb.201046531] Keyword(s): defects, dopants, photoelectron microscopy, segregation, X-ray standing waves.


  5. T. Aschenbrenner, H. Dartsch, C. Kruse, M. Anastasescu, M. Stoica, M. Gartner, A. Pretorius, A. Rosenauer, Thomas Wagner, and D. Hommel. Optical and structural characterization of AlInN layers for optoelectronic applications. J. Appl. Phys., 108(6):063533, 2010. [WWW] [doi:10.1063/1.3467964] Keyword(s): aluminium compounds, annealing, distributed Bragg reflectors, extinction coefficients, III-V semiconductors, indium compounds, MOCVD coatings, refractive index, semiconductor epitaxial layers, surface morphology, surface roughness, transmission electron microscopy, vapour phase epitaxial growth, wide band gap semiconductors, X-ray diffraction.


  6. Andreas Rosenauer, Katharina Gries, Knut Müller, Marco Schowalter, Angelika Pretorius, Adrian Avramescu, Karl Engl, and Stephan Lutgen. Measurement of composition profiles in III-nitrides by quantitative scanning transmission electron microscopy. Journal of Physics: Conference Series, 209(1):012009, 2010. [WWW] [doi:10.1088/1742-6596/209/1/012009]


  7. Andreas Rosenauer, Katharina Gries, Knut Müller, Angelika Pretorius, Marco Schowalter, Adrian Avramescu, Karl Engl, and Stephan Lutgen. Measurement of specimen thickness and composition in AlGaN/GaN using high-angle annular dark field images. Ultramicroscopy, 109(9):1171-1182, 2009. ISSN: 0304-3991. [WWW] [doi:10.1016/j.ultramic.2009.05.003] Keyword(s): Quantitative STEM Z-contrast imaging.


  8. Bernhard Gehl, Andreas Frömsdorf, Vesna Aleksandrovic, Thomas Schmidt, Angelika Pretorius, Jan-Ingo Flege, Sigrid Bernstorff, Andreas Rosenauer, Jens Falta, Horst Weller, and Marcus Bäumer. Structural and Chemical Effects of Plasma Treatment on Close-Packed Colloidal Nanoparticle Layers. Advanced Functional Materials, 18(16):2398-2410, 2008. ISSN: 1616-3028. [doi:10.1002/adfm.200800274] Keyword(s): Adsorption, GISAXS, Nanoparticle layers, Plasma, XPS.


  9. Birte Jürgens, Holger Borchert, Kirsten Ahrenstorf, Patrick Sonström, Angelika Pretorius, Marco Schowalter, Katharina Gries, Volkmar Zielasek, Andreas Rosenauer, Horst Weller, and Marcus Bäumer. Colloidally Prepared Nanoparticles for the Synthesis of Structurally Well-Defined and Highly Active Heterogeneous Catalysts. Angewandte Chemie International Edition, 47(46):8946-8949, 2008. ISSN: 1521-3773. [doi:10.1002/anie.200802188] Keyword(s): colloids, heterogeneous catalysis, nanoparticles, oxidation, supported catalysts.


  10. Abdul Kadir, M.R. Gokhale, Arnab Bhattacharya, Angelika Pretorius, and Andreas Rosenauer. {MOVPE} growth and characterization of InN/GaN single and multi-quantum well structures. Journal of Crystal Growth, 311(1):95-98, 2008. ISSN: 0022-0248. [WWW] [doi:10.1016/j.jcrysgro.2008.10.056] Keyword(s): A1. Transmission electron microscopy.


  11. A. Pretorius, T. Yamaguchi, C. Kübel, R. Kröger, D. Hommel, and A. Rosenauer. Structural investigation of growth and dissolution of nano-islands grown by molecular beam epitaxy. Journal of Crystal Growth, 310(4):748-756, 2008. ISSN: 0022-0248. [WWW] [doi:10.1016/j.jcrysgro.2007.11.203] Keyword(s): A1. High resolution transmission electron microscopy.


  12. A. Pretorius, K. Müller, T. Yamaguchi, R. Kröger, D. Hommel, and A. Rosenauer. Concentration Evaluation in Nanometre-Sized InGaN Islands Using Transmission Electron Microscopy, pages 17-20. Springer Netherlands, 2008. ISBN: 978-1-4020-8615-1. [doi:10.1007/978-1-4020-8615-1_3]


  13. Angelika Pretorius, Knut Müller, Roland Kröger, Detlef Hommel, Andreas Rosenauer, and Tomohiro Yamaguchi. Concentration measurement in free-standing InGaN nano-islands with transmission electron microscopy. Microscopy and Microanalysis, 13 (Suppl. 03):312-313, 2007.


  14. Th. Schmidt, M. Siebert, A. Pretorius, S. Gangopadhyay, S. Figge, J.I. Flege, L. Gregoratti, A. Barinov, D. Hommel, and J. Falta. Spectro-microscopy of Si doped GaN films. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 246(1):79-84, 2006. Note: Synchrotron Radiation and Materials Science Proceedings of the E-MRS 2005 Symposium O on Synchrotron Radiation and Materials Science E-MRS 2005 Symposium O. ISSN: 0168-583X. [WWW] [doi:10.1016/j.nimb.2005.12.018] Keyword(s): Photoemission microscopy.


Conference articles
  1. M. Florian, F. Jahnke, A. Pretorius, A. Rosenauer, H. Dartsch, C. Kruse, and D. Hommel. Influence of growth imperfections on optical properties of nitride pillar VCSEL microcavities. In DPG Frühjahrstagung, Regensburg (Germany), 2010.


  2. A. Rosenauer, K. Gries, K. Müller, M. Schowalter, A. Pretorius, A. Avramescu, K. Engl, and S. Lütgen. Measurement of Composition Profiles in III-Nitrides by Quantitative Scanning Transmission Electron Microscopy. In MSM XVI, Oxford 2009, 16.-20. März Journal of Physics: Conference Series, 209 (2010) 012009, 2010.


  3. Andreas Rosenauer, Knut Müller, Katharina Gries, Marco Schowalter, Angelika Pretorius, Adrian Avramescu, Karl Engl, and Stephan Lutgen. Towards Quantitative Scanning Transmission Electron Microscopy: Measurement of Composition in III Nitrides. In International Conference on Advances in Electron Microscopy and Related Techniques/XXXI Annual Meeting of EMSI, Mumbai (India) [Invited talk], 2010.


  4. A. Rosenauer, M. Schowalter, A. Pretorius, A. Avramescu, K. Engl, and S. Lutgen. Quantitative measurement of composition profiles at interfaces in semiconductor nanostructures by HRSTEM. In PSI2009, Puri, India, February 2009, 2009.


  5. H. Dartsch, S. Figge, T. Aschenbrenner, A. Pretorius, A. Rosenauer, and D. Hommel. Strain compensated AlGaN/GaN-Bragg-reflectors with high Al content grown by MOVPE. In IC-MOVPE, 1.-6. June 2008, 2008.


  6. A. Pretorius, T. Aschenbrenner, H. Dartsch, S. Figge, D. Hommel, and A. Rosenauer. Transmission electron microscopical investigation of AlGaN/GaN distributed Bragg reflectors. In IWN 2008, 6-10 Oktober, Montreaux, Schweiz Physica Status Solidi C 6, S680-S683, 2008.


  7. A. Pretorius, A. Rosenauer, T. Aschenbrenner, H. Dartsch, S. Figge, and D. Hommel. TEM analyses of microstructure and composition of Al(x)Ga(1-x)N/GaN distributed Bragg reflectors. In S. Richter, A. Schwedt (Eds.): EMC 2008, Vol. 2: Materials Science, pp. 81-82, DOI: 10.1007/978-3-540-85226-1_41, 2008.


  8. A. Pretorius, T. Yamaguchi, K. Müller, R. Kröger, D. Hommel, and A. Rosenauer. Concentration Measurement In Free-Standing InGaN Nano-Islands With Transmission Electron Microscopy. In MC 2007, Saarbrücken, Germany, September 2-7, 2007 Microsc. Microanal. 13 (Suppl. 3), 2007, 312, 2007. [doi:10.1017/S1431927607081561]


  9. A. Pretorius, M. Schowalter, N. Daneu, R. Kröger, A. Recnik, and A. Rosenauer. Structural analysis of pyramidal defects in Mg-doped GaN. In ICNS-6, August / September 2005, Bremen Phys. stat. sol c, 3 (2006), 1803, 2006.


  10. A. Pretorius, M. Siebert, T. Schmidt, R. Kroeger, T. Yamaguchi, D. Hommel, J. Falta, and A. Rosenauer. Indium Concentration Measurements in Nano-Sized InGaN Islands Using High Resolution Transmission Electron Microscopy.. In Proceedings of the 16th International Microscopy Congress, Sapporo, Japan, 1454, 2006, 2006.


  11. A. Pretorius, T. Yamaguchi, C. Kuebel, R. Kröger, D. Hommel, and A. Rosenauer. TEM analyses of wurtzite InGaN islands grown by MOVPE and MBE. In ICNS 6, August / September 2005, Bremen Phys. stat. sol c, 3 (2006), 1679-1682, 2006.


  12. A. Rosenauer, A. Pretorius, M. Schowalter, K. Müller, T. Yamaguchi, D. Hommel, D. Litvinov, and D. Gerthsen. Composition determination of semiconductor nanostructures. In NVvM - BSM Joint Meeting Lunteren, NL, November 26-28, 2006, 2006.


  13. T. Yamaguchi, S. Einfeldt, S. Gangopadhyay, A. Pretorius, A. Rosenauer, J. Falta, and D. Hommel. Two to three dimensional transitions of InGaN and the impact of GaN overgrowth. In ICNS 6, August / September 2005, Bremen Phys. stat. sol c, 3 (2006), 1396-1399, 2006.


  14. A. Pretorius, T. Yamaguchi, R. Kroeger, C. Kuebel, D. Hommel, and A. Rosenauer. Investigation of In(x)Ga(1-x)N islands with electron microscopy. In Springer Proceedings in Physics 107, 17 (2005), ISBN: 3.540-31914-X, 2005.



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