TY - JOUR A1 - Böhning, Martin A1 - Goering, Harald A1 - Hao, Ning A1 - Mach, Reinhard A1 - Oleszak, Franz A1 - Schönhals, Andreas T1 - Molecular Mobility and Gas Transport Properties of Polycarbonate-Based Nanocomposites PY - 2003 UR - http://www.ipme.ru/e-journals/RAMS/no_3503/bohning/bohning.html SN - 1606-5131 VL - 5 SP - 155 EP - 159 PB - Advanced Study Center CY - St. Petersburg AN - OPUS4-2884 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mach, Reinhard A1 - Klotz, Hans-Dieter A1 - Oleszak, Franz A1 - Maneck, Heinz-Eberhard A1 - Goering, Harald A1 - Brzezinka, Klaus-Werner T1 - Synthesis and characterization of nanoscaled and nanostructured carbon containing materials produced by thermal plasma technology N2 - Single-walled carbon nanotubes (SWNT) and carbon nitride films are synthesized by a direct current (dc) arc discharge at slightly reduced pressure and by an inductively coupled r.f. plasma (ICP) at atmospheric pressure, respectively. By treatment with nitric acid SWNT are purified from by-products and characterized by scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and Raman spectroscopy. ICP allows the deposition of carbon nitride films on steel substrate. The deposition of the films creates a relatively strong radial symmetric profile. The structure of the films are rather independent of the distance between substrate and plasma. Raman, Fourier transform infrared (FTIR), and energy dispersive X-ray (EDX) spectroscopy are used for analyzing the carbon nitride materials. T2 - 11th Conference on Applied Surface Analysis (AOFA) CY - Leipzig, Germany DA - 2000-09-24 KW - Single-walled carbon nanotubes KW - Carbon nitride films KW - Arc discharge KW - Inductively coupled r.f.plasma PY - 2001 DO - https://doi.org/10.1016/S0169-4332(01)00253-7 SN - 0169-4332 SN - 1873-5584 VL - 179 IS - 1-4 SP - 1 EP - 7 PB - North-Holland CY - Amsterdam AN - OPUS4-1023 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Goering, Harald A1 - Maneck, Heinz-Eberhard A1 - Mach, Reinhard A1 - Knoll, Uta A1 - Oleszak, Franz A1 - Gajewski, Sven A1 - Brzezinka, Klaus-Werner T1 - Synthese von Nano-Materialien - Fullerene, Kohlenstoff-Nanoröhren, Nanopulver und Schichten T2 - Materialica 2002 ; 5. Internationale Fachmesse für Werkstoffanwendungen, Oberflächen und Product Engineering CY - München, Deutschland DA - 2002-09-30 PY - 2002 SP - 1 EP - 2 AN - OPUS4-2059 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gajewski, Sven A1 - Maneck, Heinz-Eberhard A1 - Knoll, Uta A1 - Neubert, Dietmar A1 - Dörfel, Ilona A1 - Mach, Reinhard A1 - Strauß, Birgid A1 - Friedrich, Jörg Florian T1 - Purification of single walled carbon nanotubes by thermal gas phase oxidation N2 - Single walled carbon nanotubes (SWNT) have been produced in an electric arc discharge by using a graphite rod as anode which is filled with a powder mixture of graphite and metallic catalysts like nickel and yttrium. The soot material containing approximately a third of SWNT was collected from the cathode region as a soft, voluminous material. The main by-products in this process are amorphous carbon and graphitic nanoparticles which have to be removed by an appropriate purification process. The as-produced soot material was purified by gas phase oxidation in air at 355 °C. The oxidation of amorphous carbon in air is advantageous against wet chemical methods because it is better controllable. Thermogravimetric analysis and electron microscopy were used to investigate the oxidation behavior of the different kinds of carbon. Oxidation of SWNT and amorphous carbon occurs simultaneously even at moderate temperatures, whereas amorphous carbon is more rapidly oxidized than SWNT. For optimizing the purification procedure by gas phase oxidation, kinetic studies were used to determine the oxidation time for each component in the soot at a given temperature. So it is possible to remove the amorphous carbon quantitatively with minimal losses of SWNT. But it was found that graphitic nanoparticles have the highest stability against oxidation and could therefore not be quantitatively removed by this method without the complete destruction of SWNT. Therefore, the electric arc discharge process has to be a controlled process for minimum production of graphitic nanoparticles to obtain a material with a high content of SWNT. KW - Nanotubes KW - Cathodic arc discharge KW - Amorphous carbon KW - Oxidation PY - 2003 DO - https://doi.org/10.1016/S0925-9635(02)00362-X SN - 0925-9635 VL - 12 IS - 3-7 SP - 816 EP - 820 PB - Elsevier CY - New York, NY AN - OPUS4-2516 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Maneck, Heinz-Eberhard A1 - Röhl-Kuhn, Barbara A1 - Peplinski, Burkhard A1 - Benemann, Sigrid A1 - Strauß, Birgid A1 - Schütz, W. A1 - Kühn, Gerhard A1 - Friedrich, Jörg Florian ED - Pershin, L. T1 - Modification of graphite powders in a thermal RF induction plasma T2 - 17th International Symposium on Plasma Chemistry (ISPC-17) CY - Toronto, Canada DA - 2005-08-07 PY - 2005 SP - 1(?) EP - 6(?) CY - Toronto AN - OPUS4-11942 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Böhning, Martin A1 - Goering, Harald A1 - Hao, Ning A1 - Oleszak, Franz A1 - Schönhals, Andreas T1 - Molecular mobility and Gas Transport Properties of Polycarbonate-based Nanocomposites T2 - International Conference Nanomaterials und Nanotechnologies (NN 2003) CY - Crete, Greece DA - 2003-08-30 PY - 2003 AN - OPUS4-4664 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Goering, Harald A1 - Böhning, Martin A1 - Hao, Ning A1 - Oleszak, Franz A1 - Schönhals, Andreas T1 - Molecular mobility and Gas Transport Properties of Polycarbonate-based Nanocomposites T2 - Nanomaterials und Nanotechnologies (NN 2003) CY - Crete, Greece DA - 2003-08-03 PY - 2003 AN - OPUS4-4644 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Letzig, U. A1 - Goering, Harald A1 - Oleszak, Franz A1 - Jancke, Harald A1 - Pohl, M.-M. A1 - Friedrich, Jörg F. A1 - Richter, K. T1 - Effects of Heat Treatment on the Structure of Thermal Plasma Synthesized SiCN Composite Nanopowders T2 - Nanomaterials und Nanotechnologies (NN 2003) CY - Crete, Greece DA - 2003-08-30 PY - 2003 AN - OPUS4-4645 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Letzig, U. A1 - Goering, Harald A1 - Oleszak, Franz A1 - Jancke, Harald A1 - Pohl, M.-M. A1 - Friedrich, Jörg F. A1 - Richter, K. T1 - Thermisch induzierte Morphologieänderung von SiCN-Nanopulvern T2 - GEFTA 2003 Thermische Analyse und Kalorimetrie CY - Augsburg, Germany DA - 2003-09-15 PY - 2003 AN - OPUS4-4677 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Letzig, U. A1 - Jancke, Harald A1 - Oleszak, Franz A1 - Pohl, M.-M. A1 - Friedrich, Jörg F. A1 - Richter, K. T1 - Annealing of plasma synthesized SiCN composite nanopowders T2 - 12. Bundesdeutsche Fachtagung Plasmatechnologie CY - Braunschweig, Germany DA - 2005-03-21 PY - 2005 AN - OPUS4-7290 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Jancke, Harald A1 - Friedrich, Jörg F. A1 - Letzig, U. A1 - Richter, K. T1 - Synthese von SiCN-Komposit-, SiC- und Si3N4-Nanopulvern im RF-Induktionsplasma T2 - 12. Bundesdeutsche Fachtagung Plasmatechnologie CY - Braunschweig, Germany DA - 2005-03-21 PY - 2005 AN - OPUS4-7268 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mach, Reinhard A1 - Letzig, U. A1 - Goering, Harald A1 - Oleszak, Franz A1 - Friedrich, Jörg Florian A1 - Richter, K. T1 - Effects of Heat Treatment on the Structure of Thermal Plasma Synthesized SiCN Composite Nanopowders N2 - SiCN composite nanopowders with different chemical composition and characteristics were synthesized by the RF induction plasma at atmospheric pressure. Frequently the as-produced powders exhibit a high degree of chemical disorder or structural defects. Because the composition and the microstructure of starting powders have a great influence on the properties of composite ceramics, the changes of chemical composition, crystallization, and morphology of the as-produced powders during heat treatment up to 1500 °C were investigated in detail. PY - 2003 UR - http://www.ipme.ru/e-journals/RAMS/no_1503/tai/tai.html SN - 1606-5131 VL - 5 IS - 1 SP - 85 EP - 90 PB - Advanced Study Center CY - St. Petersburg AN - OPUS4-6968 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Böhning, Martin A1 - Goering, Harald A1 - Hao, Ning A1 - Mach, Reinhard A1 - Schönhals, Andreas ED - Cassidy, P. T1 - Polycarbonate/SiC nanocomposites - Influence of nanoparticle dispersion on molecular mobility and gas transport T2 - 7th International Symposium on Polymers for Advanced Technologies CY - Fort Lauderdale, FL, USA DA - 2005-09-21 KW - Nanocomposites KW - Nanoparticles KW - Polycarbonates KW - Dielectric properties KW - Gas permeation PY - 2005 VL - 16 IS - 2-3 SP - 262 EP - 268 PB - Wiley CY - Chichester AN - OPUS4-7062 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Meyer-Plath, Asmus A1 - Orts Gil, Guillermo A1 - Petrov, Sergej A1 - Oleszak, Franz A1 - Maneck, Heinz-Eberhard A1 - Dörfel, Ilona A1 - Haase, Oskar A1 - Richter, Silke A1 - Mach, Reinhard T1 - Plasma-thermal purification and annealing of carbon nanotubes N2 - We have developed a very fast and entirely gas-phase based purification technique for carbon nanotubes (CNT) that allows removing metal and metal oxide impurities with high effectiveness. CNT agglomerates from chemical vapor deposition (CVD) synthesis which contained carbon encapsulated catalysts were injected into an atmospheric plasma torch. Very high heating rates allow for quasi-instantaneous vaporization of catalyst particles. This way, metal vapors are hyposized to break mechanically instable encapsulations and effuse from incomplete ones faster than thermally induced graphitization stabilizes such particle encapsulations. The ash content of multi-walled (MW) CNT samples was reduced to less than 15% of the initial value within a few milliseconds. Also the metal content of single-walled (SW) CNT agglomerates was significantly reduced. Repeated injection of CNT agglomerates into the plasma torch resulted in higher-purity products of improved structural integrity and increased oxidation resistance. PY - 2012 DO - https://doi.org/10.1016/j.carbon.2012.04.049 SN - 0008-6223 SN - 1873-3891 VL - 50 IS - 10 SP - 3934 EP - 3942 PB - Pergamon Press CY - New York, NY AN - OPUS4-25986 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Maneck, Heinz-Eberhard A1 - Oleszak, Franz A1 - Meyer-Plath, Asmus A1 - Friedrich, Jörg F. T1 - Herstellung und Modifizierung von Nano- und Mikropulvern im thermischen und nichtthermischen Plasma T2 - 13. Workshop Oberflächentechnologie mit Plasma- und Ionenstrahlprozessen CY - Klingenthal, Germany DA - 2007-03-14 PY - 2007 AN - OPUS4-15347 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Ebert, H.-P. A1 - Reichenauer, G. A1 - Brandt, R. A1 - Braxmeier, S. A1 - Bauer, T. A1 - Tamme, R. A1 - Langer, W. A1 - Hudler, B. A1 - Christ, M. A1 - Sextl, G. A1 - Müller, G. A1 - Helbig, U. A1 - Houbertz, R. A1 - Voigt, W. A1 - Schmidt, H. A1 - Zehl, T. A1 - Mach, Reinhard A1 - Maneck, Heinz-Eberhard A1 - Meyer-Plath, Asmus A1 - Oleszak, Franz A1 - Keuper, M. A1 - Reisert, M. A1 - Burkhardt, H. A1 - Günther, E. A1 - Mehling, H. T1 - Netzwerk zur Überwindung grundlegender Probleme bei der Entwicklung hocheffizienter Latentwärmespeicher auf Basis anorganischer Speichermaterialien KW - Latentwärmespeicher KW - Materialforschung KW - Plasmaverfahren KW - Graphit PY - 2008 SN - 978-3-00-024699-9 SP - 1 EP - 217 CY - Würzburg AN - OPUS4-18273 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Meyer-Plath, Asmus A1 - Mach, Reinhard A1 - Maneck, Heinz-Eberhard A1 - Oleszak, Franz A1 - Friedrich, Jörg Florian T1 - Plasma-chemical functionalization of expanded graphite T2 - International Conference on Carbon (Carbon 2008) CY - Nagano, Japan DA - 2008-06-13 KW - Gas Discharge Plasma KW - Expanded Graphite KW - Functionalization KW - Surface Chemistry PY - 2008 SP - 1 EP - 5 AN - OPUS4-18339 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mach, Reinhard A1 - Maneck, Heinz-Eberhard A1 - Kühn, Gerhard A1 - Friedrich, Jörg F. T1 - Modification of graphite particles in the RF induction plasma T2 - 12. Bundesdeutsche Fachtagung Plasmatechnologie CY - Braunschweig, Germany DA - 2005-03-21 PY - 2005 AN - OPUS4-7326 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Friedrich, Jörg Florian A1 - Wettmarshausen, Sascha A1 - Hanelt, Sven A1 - Mach, Reinhard A1 - Mix, Renate A1 - Zeynalov, Eldar A1 - Meyer-Plath, Asmus T1 - Plasma-chemical bromination of graphitic materials and its use for subsequent functionalization and grafting of organic molecules N2 - Plasma-chemical bromination has been shown to be well-suited for highly selective and efficient C–Br-functionalization of polyolefin surfaces and has now been applied to graphitic materials, including highly oriented pyrolytic graphite (HOPG), natural graphite, carbon nanotubes, and graphitized carbon fibres. In contrast to the radical substitution of hydrogen by bromine at hydrogen-terminated sp3-hybridized carbon, bromination of all-carbon bound sp2-hybridized carbon in graphene requires addition to aromatic double bonds. The related change of sp2 to sp3 hybridization of the carbon atoms involved helps to explain experimental results of a loss in surface planarity on brominated HOPG. Bromine concentrations of up to 50 bromine atoms per 100 C-atoms were achieved in elemental bromine vapour under low-pressure plasma conditions using low-energetic inductively coupled radio-frequency plasma excitation. The time scale of the bromination progress was found to increase with the specific surface area of the material. The results of plasma-chemical bromination are compared to that of wet-chemical electrophilic addition reactions, which achieved 28 Br per 100 C for MWCNT. The resulting C–Br bonds from plasma-chemical processing of graphitic materials were shown to be well-suited for hydroxyl functionalization and for grafting of organic molecules by nucleophilic substitution with 1,6-diaminohexane and (3-aminopropyl)triethoxysilane. PY - 2010 DO - https://doi.org/10.1016/j.carbon.2010.06.054 SN - 0008-6223 SN - 1873-3891 VL - 48 IS - 13 SP - 3884 EP - 3894 PB - Pergamon Press CY - New York, NY AN - OPUS4-21954 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -