Kiel Nano, Surface and Interface Science (KiNSIS)

Physikalisches Kolloquium

Wires, trusses and pillars produced by assembly of plasma generated nanopartices (Prof. Dr. Ulf Helmersson, Linköping University, Schweden)

29.05.2018 ab 16:15

Abstract

Nanoparticles generated or supplied to a plasma attains a negative potential due to the nature of the plasma. This open up interesting possibilities in synthesis and assembly of the nanoparticles creating structures in the nano- and micro-range. In this work, we use hollow cathode sputtering powered with high-power pulse to ensure close to full ionized of the source material. This promotes rapid growth of the nanoparticles to desired sizes and the negative charge makes it possibility to guide nanoparticles for assembly and collection on desired positions. This is demonstrated by attracting na-noparticles to substrate positions with a positive potential and focusing nanoparticles through a matrix of electrostatic lenses to assemble the nanoparticles into pillars. For ferromagnetic nanoparticles, we also demonstrate generation of nanowires as well as nanowires cross-linked into trusses. Since the iron nanoparticles are generated under relatively pure condition they assemble into wires without oxides in the interfaces. Nanowires and trusses assembled on conducting substrates can potentially be used as low cost large area electrodes.

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ICE CUBE and the Discovery of High-Energy Cosmic Neutrinos (Prof. Dr. Francis Halzen, University of Wisconsin)

12.06.2018 ab 16:15

Hans - Geiger - Hörsaal (LS13 - R.52) des Physikzentrums

Abstract

The IceCube project has transformed a cubic kilometer of natural Antarctic ice into a neutrino detector. The instrument detects more than 100,000 neutrinos per year in the GeV to PeV energy range. Among those, we have isolated a flux of high-energy cosmic neutri-nos. I will discuss the instrument, the analysis of the data, the signi-ficance of the discovery of cosmic neutrinos, and the recent multi-messenger observation of a flaring TeV blazar in coincidence with the IceCube neutrino alert IC170922. The large cosmic neutrino flux observed implies that the Universe’s energy density in high-energy neutrinos is the same as that in gamma rays, suggesting that the sources are connected and that a multitude of astronomical objects await discovery.

Prof. Dr. Francis Halzen (Wisconsin IceCube Particle Astrophysics Center and Department of Physics) University of Wisconsin–Madison

 

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Particle Physics after the Higgs Discovery: Where do we go? (Prof. Dr. Thomas Mannel, Siegen)

26.06.2018 ab 16:15

Hans - Geiger - Hörsaal (LS13 - R.52) des Physikzentrums

Abstract

After the recent discovery of the Higgs boson the so-called Standard Model of particle physics has become a complete and mathematically consistent theory, which – at least in principle – could be valid up to extremely high energies. In this talk I will discuss, why research in particle physics is still well motivated, although the Higgs boson is discovered. I will consider on the one hand the theoretical problems of the standard model, on the other hand, I will discuss experimental hints, why the standard model cannot be the final theory of the fundamental interactions.

Referent: Prof. Dr. Thomas Mannel (Universität Siegen, Germany)

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30 1 2 3 4
  • 14:00: Diels-Planck-Lecture 2018 an Professor Dr. Maki Kawai, Okazaki
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  • 16:15: Plasma Potential Distribution and Electron Heating in Sputtering Magnetrons (Prof. Dr. A. Anders, Leibniz Institute of Surface Engineering)
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9 10 11 12 13
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28
  • 17:15: Acoustic wave lab-on-chip is now flexible, bendable and potentially wearable! (Prof. Richard Fu, Newcastle)
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29
  • 16:15: Wires, trusses and pillars produced by assembly of plasma generated nanopartices (Prof. Dr. Ulf Helmersson, Linköping University, Schweden)
  • 16:15: Wires, trusses and pillars produced by assembly of plasma generated nanopartices (Prof. Dr. Ulf Helmersson, Linköping University, Schweden)
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30
  • ganztägig: Nanotechnology and Innovation in Baltic Sea Region 2018 (NIBS)
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31
  • ganztägig: Nanotechnology and Innovation in Baltic Sea Region 2018 (NIBS)
  • 17:00: Low-energy electron transport in water: Aerosol droplets, molecular clusters, and liquid bulk, Prof. Ruth Signorell (ETH Zürich)
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1
  • ganztägig: Nanotechnology and Innovation in Baltic Sea Region 2018 (NIBS)
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2 3