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Conferences

The contributions of our group or participations in contributions of other groups to conferences (listed since 2009)

 

lying ahead

 

1st Conference and Spring School on Properties, Design and Applications of Upconverting Nanomaterials, 23rd-27th May 2016, Wroclaw, Poland

  • M.K. Mahata, T. Koppe, K.Kumar, H. Hofsäss & U. Vetter: "REMOTE TEMPERATURE SENSING BELOW 300 K BY YVO4:Er3+/Yb3+ UPCONVERTING PARTICLES" (Spring School)
  • M.K. Mahata, T. Koppe, K.Kumar, H. Hofsäss & U. Vetter: "INTENSE YELLOW LIGHT EMITTING YVO4:Ho3+/Yb3+ DUAL MODE PHOSPHOR" (Conference)

 

IUMRS-ICEM2016 International Union of Materials Research Societies - Internationl Conference on Electronic Materials, 4 to 8 July 2016, Suntec Singapore

  • Alrik Stegmaier, Hans Hofsäss, Ulrich Vetter: "Modelling and Experimental Studies of Proton Beam Writing in p-GaAs "(invited talk)

 

in the past

 

2015


Int. Conf. on Surface Modification of Materials by Ion Beams, (SMMIB), November 2015, Chiang Mai, Thaiand.

  • H. Hofsäss: "Quantitative Modeling of Ion-induced Surface Pattern Formation – Recent Developments" (invited talk)

 

Workshop Ionenstrahlen und Nanostrukturen, Universität Heidelberg, 22.-24.7.2015

  • Alrik Stegmaier, Ulrich Vetter and Hans Hofsäss: "Resistivity – Defect Density Relation for Light Ion Irradiation of GaAs" (talk)
  • Omar Bobes, Kun Zhang, and Hans Hofsäss: "Noble gas ion-induced ripple pattern formation on carbon surfaces" (poster)
  • Omar Bobes, Kun Zhang, and Hans Hofsäss: "Neon ion beam induced surface pattern formation on Si" (poster)

 

Int. Workshop on Nanoscale Pattern Formation at Surfaces, Krakow, Poland, July 2015.

  • H. Hofsäss: "Argon ion beam induced surface pattern formation on Si" (invited talk)
  • H. Hofsäss, O. Bobes, K. Zhang: " An explanation for the unusual pattern formation behavior on Ge" (poster)
  • H. Hofsäss, O. Bobes, K. Zhang: "Carbon ion beam induced surface pattern formation on amorhpous carbon" (poster)
  • H. Hofsäss, O. Bobes, K. Zhang: "Neon ion beam induced surface pattern formation on Si" (poster)

 

DPG Frühjahrstagung 2015, Berlin, Germany

  • Julian Alexander Amani, Tristan Koppe, Hans Hofsäss, and Ulrich Vetter: "Analysis of immittance spectra: unambiguous electrical equivalent circuits representing the underlying physics"
  • Christian Eberl, Florian Döring, Markus Osterhoff, Hans Hofsäss, Tim Salditt, and Hans-Ulrich Krebs: "Physics behind the growth of Multilayer Zone Plates"
  • Hans Hofsäss: "Modelling ion-induced pattern formation based on theories of erosion and mass redistribution using the crater function formalism"
  • Steffen Weikert, Julian Alexander Amani, and Hans Christian Hofsäss: "Doping of graphene on SiO2 with N+ and B+ ions by low-energy ion irradiation"
  • Omar Bobes, Kun Zhang, and Hans Hofsäss: "Noble gas ion-induced ripple pattern formation on carbon surfaces"
  • Alrik Stegmaier, Tristan Koppe, Charlotte Rothfuchs, Ulrich Vetter, and Hans Hofsäss: "Resolution limits of ohmic simulations for proton beam writing in p-GaAs"
  • Alrik Stegmaier, Tristan Koppe, Charlotte Rothfuchs, Ulrich Vetter, and Hans Hofsäss: "Drift diffusion model for proton beam writing in p-GaAs"
  • Omar Bobes, Kun Zhang, and Hans Hofsäss: "Noble gas ion-induced ripple pattern formation on carbon surfaces"
  • Clemens Beckmann, Christoph Brüsewitz, Omar Bobes, Ulrich Vetter, and Hans Hofsäss: "CEMS study of iron silicide formation on silicon surfaces induced by surfactant sputtering"
  • Tristan Koppe, Oliver Beck, Takashi Taniguchi, Hans Hofsäss, and Ulrich Vetter: "Ultrafast to slow time-resolved defect luminescence studies of rare earth doped AlN"

 

2014


Int. Conf. and School on Swift Heavy Ions in Materials and Characterisation (SHIMEC), 8.-17. Oct. 2014, New Delhi.

  • H. Hofsäss: "Proton Beam Writing in p-GaAs and p-Inp for the fabrication of 3D Micorstructures  for MEMS Applications" (invited talk)
  • H. Hofsäss: "Dot and Ripple Patterns -self organized - ion induced - impurity triggered" (lecture)
  • H.Hofsäss: "Simulation of ion beam irradiation of solids with SDTrimSP, SRIM and TRIDYN" (lecture)
  • H. Hofsäss: "Doping of graphene by ultra low energy mass selected ion implantation" (talk)

 

Int. Conf. on ion Beam Modification of Materials (IBMM) , 15. - 20. August 2014, Leuven, Belgium

  • H. Hofsäss: "Doping of graphene by ultra low energy mass selected ion implantation" (invited talk)
  • K. Zhang, O. Bobes, H. Hofsäss: " Evolution of nanostrucutres induced by low energy ion sputtering on Si surfaces" (poster)
  • S. Gupta, H.-G. Gehrke, C. Trautmann, D. Severin, M. Bender, J. Krauser, H. Rothard, H. Hofsäss: " Optimization of ion tracks in ta-C with derfinded charge state swift heavy ion irrdiation" (poster)

Int. Conf. on Applications of Accelerators in Research and Industry (CAARI),  26.- 30. May 2014, San Antonio, Texas, USA

  • H. Hofsäss: "Ion irradiation of Si surfaces – what determines the formation of ripple patterns?" (invited talk)

 

17th International Conference on Luminescence, Wrocklaw, Poland, July 13-18, 2014

  • M.K. Mahata, T. Koppe, K. Kumar, H. Hofsaess and U. Vetter: "Host Sensitized Luminescence and Time-resolved Spectroscopy of YVO4:Ho3+ Nanocrystals"

 

14th International Conference on Nuclear Microprobe Technology and Applications, Padova, Italy, July 6-11, 2014

  • Charlotte Rothfuchs, Alrik Stegmaier, Tristan Koppe, Ulrich Vetter, and Hans Hofsäss: "Proton Beam Writing in p-GaAs and controlled subsequent electrochemical etching to create 3D structures for MEMS applications "

 

Workshop Ionenstrahlen und Nanostrukturen, Universität Paderborn, July 21-22, 2014

  • H.-G. Gehrke, S. Gupta, C. Trautmann, D. Severin, M. Bender, J. Krauser, H. Rothard, H. Hofsäss: "Conducting ion tracks in tetrahedral amorphous carbon generated with charge selected ions"

  • C. Rothfuchs, A. Stegmaier, T. Koppe, H. Hofsäss, U. Vetter: "Proton Beam Writing in p-GaAs and p-InP for the fabrication of three dimensional microstructures for MEMS applications"

 

Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlen an Großgeräten 2014, Bonn, 21.-23.9.2014

  • Matthias Nagl, U. Vetter, H. Hofsäss: "Spektroskopie von Festkörpern mit kernphysikalischen Methoden der nächsten Generation"
  • Hans Hofsäss, Srashti Gupta, Christina Trautmann, Daniel Severin, Markus Bender, Johann Krauser, Hans Gregor Gehrke, Hermann Rothard: "Leitende Ionenspuren in amorphem Kohlenstoff erzeugt durch ladungsselektierte hochenergetische Schwerionen"

 

DPG Frühjahrstagung 2014, Dresden, Germany

  • Julian Alexander Amani, Johann Krauser, Hermann Rothard, Tristan Koppe, Ulrich Vetter, Hans Hofsäss, Serge Della-Negra, and Christina Trautmann: "cAFM measurements of conductive ion tracks in ta-C"
  • Kun Zhang, Hans Hofsäss, and Omar Bobes: "Evolution of nanostructures induced by low energy ion sputtering on Si surfaces"
  • Charlotte Rothfuchs, Tristan Koppe, Ulrich Vetter, and Hans Hofsäss: "Proton Beam Writing in p-GaAs and controlled subsequent electrochemical etching to create 3D structures for MEMS applications "
  • Omar Bobes, Kun Zhang, and Hans Hofsäss: "Self-organized nanopatterns on carbide surfaces by low energy ion irradiation with metal surfactants"
  • Kun Zhang, Christoph Brüsewitz, and Hans Hofsäss: "Nano-structured surfaces produced by low energy ion beam sputtering of amorphous FexSi1−x films"
  • H. Hofsäss, U. Bangert, W. Pierce, D. M. Kepaptsoglou, Q Ramasse, R Zan, M. H. Gass, J.A. van den Berg, C. Boothroyd, and J Amani: "Ion Implantation of Graphene - Toward IC Compatible Technologies"
  • Tristan Koppe, Oliver Beck, Hans Christian Hofsäss, and Ulrich Vetter: "Time-resolved spectroscopy of defect luminescence in aluminium nitride"
  • Christoph Brüsewitz, Daniel Jürgens, Ulrich Vetter, Hans Hofsäss, and Michel W. Barsoum: "PAC studies of uniaxial compressive stressed zinc, titanium, rutile, Ti2AlN, and Nb2AlC"

 

2013

Int. Conf. on Nanostructuring by Ion Beams, Oct. 2013, Jaipur, India

  • H. Hofsäss: "Tuning the local electronic properties of vanadium dioxide by shwoft heavy ions." (invited talk)


Int. Conf. on surface Modification of Materials by Ion Beams, (SMMIB), Sept. 2013 Kusadasi, Turkey.

  •  H. Hofsäss: "Simulation of sputter erosion with SDTrimSP, TRIDYN and SRIM" (invited talk)

 

MRS Fall Meeting, Boston, December 1-6, 2013, Boston, USA

  • J.A. Amani, T. Koppe, U. Vetter, H. Hofsaess: Voltage-Dependent Impedance Analysis of ta-C/Si Heterostructures (talk)
  • H. Hofsäss: "Electronic properties of tetrahedral amorphous carbon thin films" (invited talk)


ISOLDE Workshop and Users meeting, November 25-27, 2013, CERN

  • M. Nagl, U. Vetter, H. Hofsäss Online TDPAC with digital spectrometers (poster)


Measurement Valley, 4. Kooperationsmesse 2013, October 31, 2013, Göttingen

  • U. Vetter Dünnschichtanalyse und -modifikation mit Ionenstrahlen (Vortrag)


AEPSE 2013 - The 9th Asian-European International Conference onf Plasma Surface Engineering, Jeju Island, Korea, August 25-30, 2013

  • R. Wascher, U. Vetter, G. Avramidis, H. Militz, W. Viöl: Inner Plasma Treatment of Thin Wooden Disks (talk)


International Symposium on nanosacle pattern formation at surfaces, Kopenhagen, Denmark, May 2013.

  • H. Hofsäss, K. Zhang, A. Pape, O. Bobes, M. Brötzmann:The role of phase separation for self-organized surface pattern formation by ion beam erosion and metal atom co-deposition (invited talk)
  • K. Zhang, O. Bobes, H. Hofsäss: Designing Si surface nanopatterns by low energy ion beams with metal surfactant sputtering (poster)
  • H. Hofsäss, K. Zhang, O. Bobes, Ch. Brüsewitz, H.-G. Gehrke: New experimental results of surface ripple propagation (poster)


DPG Frühjahrstagung 2013, Regensburg, Germany

  • Ch. Brüsewitz, D. Jürgens, U. Vetter, H. Hofsäss, and M. W. Barsoum: The electric field gradient at the A site in selected MAX phase solid solutions studied with the perturbed gamma-gamma angular correlation (poster)
  • U. Vetter, T. Koppe, Ch. Rothfuchs, and H. Hofsäss: Modelling the etching behavior of GaAs irradiated with protons in a proton beam writing process (talk)
  • T. Koppe, J. Amani, H. Hofsäss, and U. Vetter: Large-scale 3D simulation and analysis of acoustic waves inpiezoelectric materials (poster)
  • J. Amani, T. Koppe, H. Hofsäss, and U. Vetter: Voltage-dependent impedance analysis of metal/ta-C/Si heterostructures (poster)
  • O. Beck, T. Koppe, T. Taniguchi, H. Hofsäss, and U. Vetter: Time-resolved luminescence studies of rare earth doped III-nitrides grown at high temperature and high pressure (poster)
  • Hans Hofsäss,Surface instability due to ion induced atomic mass transport - the CV model revisited.
  • Omar Bobes, Kun Zhang, and Hans Hofsäss, Ion beam induced surface patterns due to mass redistribution and curvature dependent sputtering.
  • K. Zhang, A. Pape, O. Bobes, M. Brötzmann and H. Hofsäss, The role of phase separation for self-organized surface pattern formation by ion beam erosion and metal atom co-deposition.
  • H. Hofsäss, K. Zhang, O. Bobes, H.-G. Gehrke, On the origin of surface ripple propagation (poster) .
  • K. Zhang, O. Bobes and H. Hofsäss, Designing the Si surface nanopattern by low energy ion beam with metal surfactant sputtering (poster).

 

 

2012

Int. Conf. on Swift Heavy Ions in Materials and Characterisation (SHIMEC), 9.-12. Oct. 2012, New Delhi.

  • H. Hofsäss: "Tuning the electrical conductivity of ion tracks generated by swift heavy ion irradiation"


Int. Conf. on Applications of Accelerators in Research and Industry (CAARI) 5.- 10. Aug. 2012, Fort Worth, Texas, USA

  • H. Hofsäss: "Is sputter erosion relevant for ion-induced self-organized pattern formation"


INTC meeting, ISOLDE, CERN, December 17-20, 2012

  • M. Nagl, U. Vetter, and H. Hofsäss: The next generation of implantation chambers for GPS (poster)

 

67th IUVSTA Workshop: High temperature amorphous and nanostructured ceramic coatings, Daresbury, September 24-27, 2012

  • H. Hofsäss, Ch. Brüsewitz, D. Jürgens, U. Vetter, M. Uhrmacher, and M. W. Barsoum Deformation of MAX phases: An insight into microscopic scales with PAC and Nanomechanical Tests
  • D. Jürgens, C. Brüsewitz, M. Uhrmacher, U. Vetter, H. Hofsäss, J. Mestnik-Filho and M. W. Barsoum The application of perturbed gamma-gamma angular correlation to the field of MAX phases

 

13th International Conference on Nuclear Microprobe Technology & Applications 2012, Lisbon, July 22-27, 2012

  • Ch. Rothfuchs, T. Koppe, M. Schulte-Borchers, H. Hofsäss, and U. Vetter Fluence dependent 3D structure formation for MEMS in III-V semiconductors with proton beam writing

 

Fourth international New Diamond and Nano Carbons conference, San Juan, Puerto Rico, May 20-24, 2012

  • H. Hofsäss Is sputter erosion relevant for ion induced self-organized surface patterns?
  • H. Hofsäss, P. Ehrhardt, H.G. Gehrke, M. Brötzmann, U. Vetter, K. Zhang, J. Krauser, Ch. Trautmann, C. Ko, S. Ramanathan Tuning the conductivity of vanadium dioxide films on silicon and sapphire by swift heavy ion irradiation
  • H. Hofsäss, H.-G. Gehrke, M. Brötzmann, A.-K. Nix, J. Krauser, Ch. Trautmann, A. Weidinger On the electrical conductivity of ion tracks in tetrahedral amorphous carbon generated by swift heavy ion irradiation
  • M. Brötzmann, J.A. Amani, D. Lyzwa, H.-G. Gehrke, T. Koppe, U. Vetter, H. Hofsäss AC properties and photoresponse of carbon based Metal – Amorphous Semiconductor – Semiconductor diodes
  • M. Brötzmann, H.-G. Gehrke, T. Koppe, U. Vetter, H. Hofsäss Carbon based Metal – Amorphous Semiconductor – Semiconductor diodes – a general temperature dependent conduction model

 

DPG Frühjahrstagung 2012, Berlin, Germany

  • M. Schulte-Borchers, U. Vetter, and H. Hofsäss: Proton Beam Writing in semiconductors: A new approach towards MEMS devices (poster) 
  • U. Vetter, T. Koppe, T. Taniguchi, J. B. Gruber, G. W. Burdick: Crystal field investigations of rare earth doped aluminum nitride (talk)
  • Ch. Brüsewitz, M. Uhrmacher, U. Vetter, H. Hofsäss, and M. W. Barsoum: Perturbed gamma-gamma angular correlation - applications in terms of elastic and plastic deformation in MAX phases (poster)
  • O. Bobes, K. Zhang, and H. Hofsäss: Threshold sputter depth for anopattern formation and "zero" sputter yield ion beam irradiation of amorphous carbon (talk)
  • O. Bobes, K. Zhang, and H. Hofsäss: Ripple pattern formation on single cyrstalline magnesium oxide (poster)
  • D. Jürgens, M. Uhrmacher, U. Vetter, H. Hofsäss, J. Mestnik-Filho, and M. W. Barsoum: Study of the EFGs at both M- and A-sites in Zr2InC and Hf2InC using 𝛾-𝛾 angular correlation spectroscopy (poster)
  • D. Jürgens, M. Uhrmacher, U. Vetter, H. Hofsäss, J. Mestnik-Filho, and M. W. Barsoum: The effect of the stacking sequence on the EFG in the MAX phase systems Ti-Al-X (X = C, N) (poster)
  • H. Hofsäss, K. Zhang, U. Vetter, O. Bobes, and Ch. Brüsewitz: Manipulating the aspect ratio of Si surface nanopattern with low energy ion sputtering and reactive ion etching (poster)
  • H. Hofsäss, K. Zhang, U. Vetter, O. Bobes, A. Pape, H.-G. Gehrke, and M. Brötzmann: Influence of Phase Separation for Surfactant Driven Pattern Formation during Ion Beam Erosion (poster)

 

2011


MRS Fall Meeting, Boston, November 28 - December 1, 2011, Boston, USA

  • U. Vetter, T. Taniguchi, J. B. Gruber, G. W. Burdick, H. Hofsaess, S. Chandra, and D. K. Sardar: Spectrocopicy properties of w-AlN and c-BN doped with rare earths during high temperature - high pressure synthesis (poster)
  • H. Hofsäss, K. Zhang, U. Vetter, O. Bobes, A. Pape and M. Brötzmann: Influence of Phase Separation for Surfactant Dirven Pattern Formation during Ion Beam Erosion (poster)
  • M. Schulte-Borchers, U. Vetter, and H. Hofsaess: The Feasibility of Proton Beam Writing as a Tool to Fabricate MEMS devices in Semiconductors (poster)

 

Nanoscale Pattern Formation at Surfaces, September 18-22, 2011, Madrid, Spain 

  • K. Zhang, O. Bobes, H. Hofsäss: Zero sputter yield ion beam irradiation of amorphous carbon with 100 eV Xe ions (talk)
  • H. Hofsäss, K. Zhang, O. Bobes, A. Pape, M. Brötzmann: One the role of phase separation for the surfactant driven pattern formation during ion beam erosion (talk)
  • H. Hofsäss, K. Zhang, O. Bobes, Ripple pattern formation of single crystalline magnesium oxide (poster)
  • O. Goepfert, H. Hofsäss, U. Vetter, and R. Kree: Simulation of Growth and Propagation of ion-beam unduced ripple formation (poster)

 

3rd International Workshop "Novel Developments and Applications in Sensor Technology", Institute of Sensor and Actuator Technology, September 14 - 16 , 2011, Coburg, Germany

  • T. Koppe, U. Vetter, N. Borth, H. Hofsäss, D. Rose, J.-P. Kärst: Aluminium nitride and its applications to surface acoustic wave and optoelectronic devices (poster)
  • U. Vetter: The application of ion beams to sensor development at the II. Department of Physics, University of Göttingen (talk)

 

Workshop Ionen- und Positronenstrahlen, Universität der Bundeswehr, July 4-5, Neubiberg,  Germany

  • M. Nagl, U. Vetter, H. Hofsäss: Presentation of an optimized six detector full digital time differential gamma-gamma angular correlation spectrometer
  • H.-G. Gehrke, M. Brötzmann, P. Ehrhardt, J. Krauser, Ch. Trautmann, A. Weidinger, and H. Hofsäss, New developments on conductive ion tracks in tetrahedral amorphous carbon and other thin film materials 


International Conference on Materials for Advanced Technologies, June 26 - July 01, 2011, Singapore

  • M. Schulte-Borchers, U. Vetter, H. Hofsäss: Proton Beam Writing in Semiconductors (poster) 


E-MRS ICAM IUMRS 2011 Spring Meeting, May 10-12, 2011, Nice, France

  • M. Schulte-Borchers, U. Vetter, H. Hofsäss: Proton Beam Writing in Semiconductors (poster)
  • K. Zhang, A. Pape, H.-G. Gehrke, M. Brötzmann and H. Hofsäss: Ion-beam-erosion induced smoothing and nano-pattering of Si surface driven by metal surfactants  (poster)

  

Short Course on Physical Characterization of Nanostructures, May 8-13, 2011, Leuven, Belgium

  • U. Vetter: Fundamentals of ion-solid interactions (invited lecture)


20th Int. Conf. on Ion Beam Analysis IBA 2011, April 11-15, 2011, Itapema, Brazil

  • H. Hofsäss:  Ion beam analysis of surfactant driven self-organized patterns generated by ion beam erosion (invited talk)
  • H. Hofsäss and K. Zhang:  Simulating sputtering with BCA Monte Carlo programs (poster)

 

DPG Frühjahrstagung 2011, Dresden, Germany

  • H. Hofsäss and K. Zhang: Surfactant driven sef-organized pattern formation by ion beam erosion (talk)
  • K. Zhang, O. Göpfert, H.-G. Gehrke, H. Hofsäss: Dynamics of surfactant induced ripples on Si generated by ion beam erosion (talk)
  • K. Zhang, A. Pape, M. Brötzmann, H. Hofsäss: Self-organized surface patterns on Si by sputter erosion with Mo surfactants (poster)
  • K. Zhang, U. Vetter, N. Borth, H.-G. Gehrke, R. Jajavel, H. Hofsäss: Surfactant assisted  ion beam erosion of AlN and GaN surfaces (poster)
  • Hans Hofsäss and Kun Zhang: Simulating sputtering with BCA Monte Carlo programs (poster)
  • J. Amani, M. Brötzmann, U. Vetter, and H. Hofsäss: Electrical and Optical Characterisation of ta-C/Silicon MASS diodes (poster)
  • N. Borth, U. Vetter, T. Koppe, M. Brötzmann, H.-G. Gehrke, K. Zhang, and H. Hofsäss: Electrical characterization of ion implanted AlN on sapphire (talk)
  • Ch. Brüsewitz, D. Jürgens, M. Uhrmacher, H. Hofsäss, M. W. Barsoum: Investigation of the mechanical properties of the 413-MAX phase Ti4AlN3 by perturbed 𝛾-𝛾 angular correlation (talk)
  • D. Jürgens, Ch. Brüsewitz, M. Uhrmacher, H. Hofsäss, M. W. Barsoum: Towards the study of electric field gradients in M2AlC (M = Ti, Nb, V, Cr) MAX phases (poster)


Symposium on Size Selected Clusters 2011 in Memoriam: Prof. Dr. E. Recknagel, March 20-25, Davos/Switzerland

  • H. Hofsäss: Turbostratic, amorphous and nanocrystalline carbon and boron nitride (invited talk)

 

International Conference on Ion-Beam Induced Nanopatterning of Materials (IINM-2011), Bhubaneswar, India

  • H. Hofsäss and K. Zhang: Surfactant driven self-organized surface patterns by ion beam erosion (invited talk)
  • K. Zhang, U. Vetter, N. Borth, H.-G. Gehrke, R. Jayavel and H. Hofsäss:  Surfactant assisted ion beam erosion of GaN and AlN surfaces
  • K. Zhang, A. Pape, M. Brötzmann and H. Hofsäss: Self-organized surface patterns on Si by sputter erosion with molybdenum surfactants (poster)
  • K. Zhang, O. Göpfert, H.-G. Gehrke and H. Hofsäss: Dynamics of surfactant unduced riplle patterns on Si generated by ion beam erosion (talk)
  • H. Hofsäss and K. Zhang: Simulating sputtering with BCA Monte Carlo programs (poster)

 

 

2010


Swift Heavy Ions induced Materials Engineering and Characterization (SHIMEC 2010), New Delhi, India

  • H. Hofsäss: Conducting ion tracks(invited talk)

 

3rd Joint International Conference on Hyperfine Interactions and International Symposium on Nuclear Quadrupole Interactions, Geneva, CERN

  • D. Jürgens, M. Uhrmacher, H. Hofsäss, U. Vetter, J. Mestnik-Filho, and M. W. Barsoum: Perturbed 𝛾-𝛾 angular correlation studies of indium containing 211-MAX phases (poster)
  • D. Jürgens, M. Uhrmacher, H. Hofsäss, U. Vetter, J. Mestnik-Filho, and M. Barsoum: Perturbed 𝛾-𝛾 angular correlation studies of indium free 211-MAX phases (poster)

 

17th International Conference on Ion Beam Modification of Materials, Montréal, Canada

  • U. Vetter, E. Seibel, N. Borth, S. Müller, John B. Gruber, H.-G. Gehrke, M. Brötzmann and H. Hofsäss: Selective reduction of AlN defect luminescence by implantation with light elements (poster)
  • H.-G. Gehrke, A.-K. Nix, J. Krauser, Ch. Trautmann, A. Weidinger, U. Vetter and H. Hofsäss: Fabrication of Quantum Dots in a ta-C/BN Multilayer system by Swift Heavy Ions

 

12th International Workshop on Slow Positron Beam Techniques, Magnetic Island, Australia

  • A. Krille, M. Nagl, U. Vetter, H. Hofsäss, R. Krause-Rehberg: A new Monte-Carlo-Simulation of Scintillation-Detectors: Results and Comparison with Reality

 

DPG Frühjahrstagung, Regensburg, Germany

  • M. Brötzmann, U. Vetter, and H. Hofsäss: Apparently large ideality factors of MASS-diodes on the basis of the t-BN/SiC system; HL 9.4 (talk)

  • Ch. Brüsewitz, U. Vetter, and H. Hofsäss: Electroluminescence of doped and undoped AlN/SiC heterojunctions; HL 61.34 (poster)

  • F. Büttner, H. Hofsäss and K. Zhang: Magnetic properties of ion beam induced ripple patterned Fe layers; MA 33.17 (poster)

  • H.-G. Gehrke, A.-K. Nix, J. Krauser, Ch. Trautmann, A. Weidinger, and H.Hofsäss: Conducting ion tracks in tetrahedral amorphous carbon films; DS 9.23 (poster)

  • H.-G. Gehrke, A.-K. Nix, J. Krauser, Ch. Trautmann, A. Weidinger, and H.Hofsäss: Single Ion Lithography; DS 25.4 (talk)
  • D. Jürgens, M. Uhrmacher, H. Hofsäss, and J. Mestnik-Filho: Perturbed 𝛾-𝛾 angular correlation studies of  selected 211-MAX phases using 111In probes; MM 8.1 (talk)

  • S. Müller, T. Taniguchi, U. Vetter, and H. Hofsäss: Defect and intra-4f luminescence of rare earth doped group-III nitrides synthesized by high pressure high temperature method; HL 34.23 (poster)

  • M. Nagl, A. Krille, U. Vetter, R. Krause-Rehberg, H. Hofsäss: Prediction and analysis of the time and energy resolution of scintillation-detectors by Monte-Carlo simulations; ST 3.1 (poster)

  • M. Nagl, U. Vetter, M. Uhrmacher, and H. Hofsäss: An all-digital time differential 𝛾-𝛾 angular correlation spectrometer for the study of defects in semiconductors; HL 61.44 (poster)

  • A.-K. Nix, U. Vetter, D. Severin, Ch. Trautmann, and H. Hofsäss: Effect of swift heavy ion irradiation on diamond; HL 61.13 (poster)

  • A.-K. Nix, H.-G. Gehrke, J. Krauser, Ch. Trautmann, A. Weidinger, and H. Hofsäss: Conductivity improvement of graphite-like ion tracks in tetrahedral amorphous carbon; DS 29.13 (poster)

  • M. Schulte-Borchers, U. Vetter, and H. Hofsäss: Proton Beam Writing; DS 9.14 (poster)

  • K. Zhang, and H. Hofsäss: Smoothening and patterning of Si surfaces produced by metal surfactant sputtering; DS 9.11 (poster)

 

Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlen an Großgeräten (SNI 2010), Berlin

  • H. Hofsäss: Von Ionenspuren zu Nanostrukturen (Hauptvortrag)
  • A.-K. Nix, S. Müller, U. Vetter, Ch. Trautmann, und H.Hofsäss: Swift heavy ion irradiation as method for defect annealing
  • H.-G. Gehrke, A.-K. Nix, J. Krauser, A. Weidinger, U. Vetter und H. Hofsäss Conducting ion tracks in tetrahedral amorphous carbon films

 

Workshop on Ion Beam Physics 2010, FZD Dresden

  • H.-G. Gehrke, A.-K. Nix, J. Krauser, A. Weidinger, U. Vetter und H. Hofsäss Ion track lithography

 

Material Research Society  Spring Meeting 2010, San Francisco

  • H.-G. Gehrke, A.-K. Nix, J. Krauser, A. Weidinger, U. Vetter und H. Hofsäss Conducting ion tracks

 

 

2009

Workshop on Nanoscale Modification of Surfaces and Thin Films, Rathen, Germany

  • H. Hofsäss: Surfactant Sputtering (invided talk)


Workshop on Digital Signal Processing in Nuclear Science, Dresden, Germany

  • M. Nagl, U. Vetter, H. Hofsäss, D. Jürgens, and M. Uhrmacher: Using fast digitizers for PAC coincidence measurements (talk)

 

12th International Conference on the Formation of Semiconductor Interfaces (ICFSI-12), Weimar, Germany

  • M. Brötzmann, U. Vetter and H. Hofsäss: a-C/Si Heterojunctions with apparently large ideality factors 

 

The Use of ISOLDE in Condensed Matter and Life Science Research, Saarbrücken, Germany

  • M. Nagl, U. Vetter, H. Hofsäss, D. Jürgens, and M. Uhrmacher: A new all-digital PAC spectrometer

 

DPG Frühjahrstagung 2009, Dresden, Germany

  • H. Hofsäss and K. Zhang: Fundamentals of surfactant sputtering; DS 10.2 (talk)

  • K. Zhang, H. Hofsäss, and H. Zutz: Amorphous / nanocrystalline metal-silicide films prepared by surfactant sputtering with low energy ion-beam; DS 26.2 (poster)

  • H.-G. Gehrke, A.-K. Nix, J. Krauser, Ch. Trautmann, A. Weidinger, and H. Hofsäss: Conductivity of ion tracks in doped tetrahedral amorphous carbon; DS 26.28  (poster)

  • Ch. Borschel, M. Schnell, C. Ronning, and H. Hofsäss: A Computer Program for the Analysis of High Resolution Rutherford Backscattering Spectra; DS 26.40 (poster)
  • F. Büttner, H. Hofsäss, and K. Zhang: Magnetic properties of ion beam induced ripple pattered Fe layers; DS 28.1 (talk)
  • H. Zutz, D. Lyzwa, C. Ronning, M. Seibt, and H. Hofsäss: Self-organization in metal containing amorphous carbon
    nanocomposites; DS 29.3 (talk)
  • H.-G. Gehrke, A.-K. Nix, J. Krauser, Ch. Trautmann, A. Weidinger, J. Bruns, F. Wünsch, and H. Hofsäss: Self-Aligned Field Emission Device Prepared by Swift Heavy Ion Irradiation: DS 30.7 (talk)
  • M. Brötzmann, H. Zutz, A.-K. Nix and H. Hofsäss: Successful fabrication of h-BN/ZnO heterojunction diodes; HL 3.2 (talk)

  • A.-K. Nix, S. Müller, U. Vetter, Ch. Trautmann, and H. Hofsäss: Swift heavy ion irradiation induced recrystallization of implanted GaN; HL 41.9 (talk)
  • D. Jürgens, M. Uhrmacher, H. Hofsäss, A. Kulinska, J. Mestnik-Filho, and M. W. Barsoum: Characterization of MAX phases via hyperfine interactions; MM 10.3 (talk)

  • T. Yasseri, K. Zhang, H. Hofsäss, and R. Kree: Topography dependent distribution of Ag on Si surfaces during surfactant sputtering; O 42.15 (poster)

 

19th International Conference on Ion Beam Analysis (IBA 2009), Cambridge, UK

  • H. Hofsäss, K. Zhang, and H. Zutz: Ion Beam Analysis of Smooth Gold-Silicide Surface Layers on Si Produced by Surfactant Sputtering

  • K. Zhang, H. Hofsäss, and H. Zutz: Characterization of nanoscale metal-silicide films prepared by surfactant sputtering

  • D. Jürgens, M. Uhrmacher, H. Hofsäss, J. Mestnik-Filho, and M. W. Barsoum: Perturbed 𝛾-𝛾 angular correlation studies of  211-MAX phases using 111In probes

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II. Physikalisches Institut
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