TY - JOUR A1 - Seifarth, Olaf A1 - Burkov, Yevgen A1 - Goryachko, Andriy A1 - Schmeißer, Dieter A1 - Sydorenko, Alexander A1 - Krenek, Radim A1 - Stamm, Manfred T1 - Photoelectron spectroscopy and microscopy on Cr nano particels embedded into block copolymers Y1 - 2005 ER - TY - GEN A1 - Seifarth, Olaf A1 - Schmeißer, Dieter A1 - Stamm, Manfred A1 - Krenek, Radim A1 - Sydorenko, Alexander T1 - Electron spectroscopy and microscopy on chromium oxide nanowires on templated block copolymers T2 - Progress in Solid State Chemistry KW - copolymers KW - nanowires Y1 - 2006 SN - 0079-6786 VL - 34 IS - 2-4 SP - 111 EP - 119 ER - TY - GEN A1 - Seifarth, Olaf A1 - Burkov, Yevgen A1 - Schmeißer, Dieter A1 - Stamm, Manfred T1 - Metallic nickel nanorod arrays embedded into ordered block copolymer templates T2 - Thin Solid Films Y1 - 2007 SN - 0040-6090 VL - 515 IS - 16 SP - 6552 EP - 6556 ER - TY - GEN A1 - Schroeder, Thomas A1 - Lupina, Grzegorz A1 - Seifarth, Olaf A1 - Tallarida, Massimo A1 - Schmeißer, Dieter T1 - Synchrotron radiation x-ray photoelectron spectroscopy study on the interface chemistry of high-k PrxAl2-xO3 (x=0-2) dielectrics on TiN for dynamic random access memory applications T2 - Journal of Applied Physics Y1 - 2007 SN - 0021-8979 VL - 102 IS - 1 SP - 014103 ER - TY - GEN A1 - Schmeißer, Dieter A1 - Müller, S. A1 - Seifarth, Olaf A1 - Dabrowski, Jarek Marek A1 - Müssig, Hans-Joachim A1 - Schroeder, Thomas T1 - On the band gaps and electronic structure of thin single crystalline praseodymium oxide layers on Si(111) T2 - Journal of vacuum science & technology / B KW - band gabs KW - electronic structure KW - oxide layers Y1 - 2009 VL - 27 IS - 1 SP - 271 EP - 276 ER - TY - GEN A1 - Seifarth, Olaf A1 - Schubert, Markus Andreas A1 - Giussani, A. A1 - Klenov, D. O. A1 - Schmeißer, Dieter A1 - Schroeder, Thomas T1 - Single crystalline Pr2-xYxO3 (x=0-2)dielectrics on Si with tailored electronic and crystallographic structure KW - crystalline KW - dielectric KW - structure Y1 - 2010 SN - 1089-7550 VL - 108 IS - 10 SP - 103709 ER - TY - CHAP A1 - Seifarth, Olaf A1 - Wilke, A. A1 - Walczyk, Christian A1 - Dabrowski, Jarek Marek A1 - Zaumseil, Peter A1 - Schmeißer, Dieter A1 - Müssig, Hans-Joachim A1 - Schroeder, Thomas T1 - Band gap and electronic structure determination with XAS and UPS of thin Pr-oxide films on Si(111) T2 - Proceedings of 15th Workshop on Dielectrics in Microelectronics, Bad Saarow, 23 - 25 June 2008, Bad Saarow (Berlin) KW - band gab KW - XAS KW - UPS KW - Si(111) Y1 - 2008 SP - 285 EP - 286 ER - TY - JOUR A1 - Sohal, Rakesh A1 - Lupina, Grzegorz A1 - Lippert, Gunther A1 - Wenger, Christian A1 - Seifarth, Olaf A1 - Schröder, Thomas A1 - Tallarida, Massimo A1 - Schmeißer, Dieter T1 - Interface chemistry of high-k PrxAl2-xO3 (x=2-0) dielectrics on TiN for dynamic random access memory applications KW - high-k KW - dielectric KW - random Y1 - 2008 ER - TY - THES A1 - Seifarth, Olaf T1 - Properties of chromium, cobalt and nickel nanoparticles embedded into ordered block copolymers and conducting polymers KW - block copolymers KW - chromium nanoparticles KW - cobalt nanoparticles KW - nickel nanoparticles Y1 - 2006 CY - Cottbus ER - TY - CHAP A1 - Krenek, Radim A1 - Cimrova, Vera A1 - Seifarth, Olaf A1 - Bocharova, Vera A1 - Gorodyska, Ganna A1 - Sidorenko, Alexander A1 - Schmeißer, Dieter A1 - Stamm, Manfred T1 - Electronic Properties of Metals Embedded into Porous Polymeric Nanotemplates T2 - Verhandlungen der Deutschen Physikalischen Gesellschaft ; Reihe 6, Bd. 41 N2 - We report on electrical measurements (current-voltage characteristics (CVC)) of metals which are templated via porous polymeric nanotemplates. The nanotemplates are based on self-organization of poly(styrene-block 4-vinylpyridine) (PS-PVP). The cylindrical pores of 8 nm in the diameter are ordered in a hexagonal lattice (24 nm in the period). Chromium and gold were embedded in the nanotemplates by magnetron sputtering, nickel was electrodeposited. These thin films were characterized by AFM, ellipsometry, x-ray reflectivity, XAS, XPS and NEXAFS. CVC were acquired by a connection common for light emitting diodes discussing a further use of nanotemplated metals in these devices. To make the connection, the nanotemplate was deposited on glass with ITO electrodes, then metal was embedded into it and finally Al electrodes were evaporated on the device. Behaviour of space charge limited currents (SCLC) was observed. Also, we deal with the electrical mode of AFM as well. Finally electronic behaviour of the metallic nanorods embedded in polymeric nanotemplates is discussed in respective to the structure and chemical composition obtained by AFM and x-ray techniques. Y1 - 2006 UR - http://www.dpg-verhandlungen.de/year/2006/conference/dresden/part/cpp/session/25/contribution/2 SN - 0420-0195 SP - S. 108 PB - Deutsche Physikalische Gesellschaft CY - Bad Honnef ER - TY - CHAP A1 - Mandal, Dipankar A1 - Müller, Klaus A1 - Seifarth, Olaf A1 - Hoffman, Patrick A1 - Henkel, Karsten A1 - Schmeißer, Dieter T1 - Study of reactions at the interface P(VDF/TrFE)/Al and P(VDF/TrFE)/PEDOT:PSS T2 - Verhandlungen der Deutschen Physikalischen Gesellschaft ; Reihe 6, Bd. 42 N2 - Due to potential use in non volatile memory application, Poly(vinylidene fluoride/trifluoroethylene) (P(VDF-TrFE)) is a great deal of interest, especially to produce organic field effect transistors (OFET). Right now it was found that Aluminum is one of the cost-effective inorganic electrode candidate. On the other hand, poly(3,4 ethylenedioxythiophene):poly(4-styrenesulfonate)(PEDOT:PSS) shows promising behavior for the application as organic electrode. In part of our investigations we have systematically studied surface interactions of organic ferroelectric thin films (P(VDF-TrFE))with inorganic (Al) and organic layers (PEDOT:PSS). By X-ray photoelectron spectroscopy (XPS) is has been found that there is a interfacial reaction with Al and the copolymer. In contrast, for electrodes, made of PEDOT: PSS, we found not such kind of behavior. In this case, we found no evidence for any surface reaction. Furthermore, we present our results concerning the orientation of permanent dipoles in the co-polymer (formed between hydrogen and fluorine atom). Here, we use Near-edge X-ray absorption fine structure (NEXAFS) analysis at the U 49/2 - PGM2 beam line of the BESSY-II Synchrotron. This work is supported by Deutsche Forschungsgemeinschaft (DFG) within priority program 1157 (DSCH 745/11-1). Y1 - 2007 UR - http://www.dpg-verhandlungen.de/year/2007/conference/regensburg/part/syoe/session/8/contribution/18 SN - 0420-0195 SP - S. 797 PB - Deutsche Physikalische Gesellschaft CY - Bad Honnef ER - TY - CHAP A1 - Seifarth, Olaf A1 - Walczyk, Christian A1 - Lupina, Grzegorz A1 - Dabrowski, Jaroslaw A1 - Weidner, Günter A1 - Zaumseil, Peter A1 - Schmeißer, Dieter A1 - Storck, Peter A1 - Müssig, Hans-Joachim A1 - Schroeder, Thomas T1 - On the electronic and dielectric characterisation of thin cubic PrO2 layers on Silicon T2 - Verhandlungen der Deutschen Physikalischen Gesellschaft, Reihe 6, Bd. 43 N2 - For the integration of 100 % Ge onto the Si platform, a buffer oxide approach has been developed recently, using rare earth oxides to tune the lattice constant between the Si and the Ge. Among these buffer oxides, PrO2 is a prospective candidate with high quality crystalline growth on Si, moderated by an interfacial Pr-silicate between. In order to specify electronic properties of thin PrO2 and its interface on Si(111), especially the width of the band gap, we performed synchrotron radiation based XPS, UPS and XAS measurements at the U49/2 PGM 2 beamline at BESSY II and correlate the results with our structural characterisation performed by TEM and XRD. In order to evaluate the dielectric properties of thin PrO2 layers on Si(111), we performed temperature-, time-, voltage-, and layer thickness-dependent leakage current measurements (J-V). Here, we identified relaxation behaviour in the leakage current, successfully addressed to defect like states inside the Pr-silicate interface layer, corroborated by frequency dependent capacitance versus voltage (C-V) measurements. Y1 - 2008 UR - http://www.dpg-verhandlungen.de/year/2008/conference/berlin/part/df/session/12/contribution/6 SN - 0420-0195 SP - S. 196 PB - Deutsche Physikalische Gesellschaft CY - Bad Honnef ER - TY - CHAP A1 - Seifarth, Olaf A1 - Walczyk, Christian A1 - Lupina, Grzegorz A1 - Zaumseil, Peter A1 - Schmeißer, Dieter A1 - Müssig, Hans-Joachim A1 - Schroeder, Thomas T1 - The electronic band diagram of thin PrO2(111) / Pr-silicate buffers on Si(111) and its relevance to dielectric properties T2 - Verhandlungen der Deutschen Physikalischen Gesellschaft, Reihe 6, Bd. 44 N2 - Thin dielectric buffers of cubic PrO2(111) on Si(111) are ideally suited to integrate Ge onto Si by moderating the lattice mismatch between the materials. The leakage current across this dielectric buffer is strongly influenced by the electronic band diagram and defects inside the band gap. Therefore, we measured the band offsets, band gaps and defect positions by means of synchrotron radiation based photoemission spectroscopy techniques (XPS and XAS) with special emphasis on the Pr-silicate interface. In a next step we compare the spectroscopic data with information from dielectric studies, based on temperature dependent leakage current studies. We observe a close relation between dielectric properties and the electronic structure. Y1 - 2009 UR - http://www.dpg-verhandlungen.de/year/2009/conference/dresden/part/df/session/6/contribution/5 SN - 0420-0195 SP - S. 136 PB - Deutsche Physikalische Gesellschaft CY - Bad Honnef ER - TY - CHAP A1 - Seifarth, Olaf A1 - Burkov, Yevgen A1 - Schmeißer, Dieter A1 - Sydorenko, Alexander A1 - Krenek, Radim A1 - Stamm, Manfred T1 - Photoelectron spectroscopy and microscopy on magnetic nano particles embedded into block copolymers T2 - Verhandlungen der Deutschen Physikalischen Gesellschaft N2 - The formation of metallic nano particles stored in thin films of block copolymers has been investigated by means of synchrotron radiation based photoemission spectroscopy (PES) and microscopy (PEEM). Empty channels in poly(styrene-block-4-vinylpyridine) copolymer with diameters of tens of nanometers filled with CrO2, Cr2O3 and Ni provide ideal bases for performing electron spectroscopy with energy and lateral resolution on magnetic nano particles. We present UPS, XPS, NEXAFS spectra and PEEM images on and off the C 1s, Cr 2p, Ni 2p resonances and discuss the geometric and electronic structure of such compounds. The synchrotron radiation was delivered from the U49/2 beamline at BESSY II. KW - photoelectron emission microscopy (PEEM) KW - X-ray photoelectron spectroscopy KW - X-ray absorption spectroscopy KW - block copolymers KW - magnetic nano particles Y1 - 2005 UR - http://www.dpg-verhandlungen.de/year/2005/conference/berlin/part/cpp/session/29/contribution/27?lan=en PB - Deutsche Physikalische Gesellschaft CY - Bad Honnef ER -