@article{PopWinterBatcheloretal., author = {Pop, D. and Winter, B. and Batchelor, David R. and Freyer, W. and Weber, R. and Br{\"o}cker, D. and Hertel, I. V. and Schmeißer, Dieter and Widdra, Wolf}, title = {Copper Satellite Structure in Porphyrazine Compounds}, language = {en} } @article{GraciaMartinConcepcionBarrancoetal., author = {Gracia, F. and Martin-Concepcion, A. I. and Barranco, A. and Holgado, J. P. and Espinos, J. P. and Yubero, F. and Batchelor, David R. and Schmeißer, Dieter and Gonzalez-Elipe, A. R.}, title = {XAS investigation of texture in TiO2 thin films prepared by IBICVD}, language = {en} } @article{SieberSeyllerGraupneretal., author = {Sieber, N. and Seyller, Th. and Graupner, R. and Ley, L. and Mikalo, Ricardo Pablo and Hoffmann, Patrick and Batchelor, David R. and Schmeißer, Dieter}, title = {Wet-chemical preparation of silicate adlayer reconstructed SiC(0001) surfaces as studied by PIES and LEED}, abstract = {We have studied the surface chemistry of 6H-SiC(0001) and 6H-SiC (000 (1) over bar) after wet-chemical treatment using photoelectron spectroscopy (PES) andlow-energy electron diffraction (LEED). The origin of chemically shifted components in the Si2p and C1s spectra is discussed in the light of previous studies onwet-chemically prepared surfaces and on silicate adlayer reconstructed surfaces. On 6H-SiC(0001) an ordered silicate adlayer was prepared by etching the surface withsulfuric acid based agents.}, language = {en} } @article{GraupnerSeyllerLeyetal., author = {Graupner, R. and Seyller, Th. and Ley, L. and Mikalo, Ricardo Pablo and Hoffmann, Patrick and Batchelor, David R. and Schmeißer, Dieter}, title = {PEEM Investigation of CVD-Diamond grown on Si}, language = {en} } @article{SieberSeyllerGraupneretal., author = {Sieber, N. and Seyller, Th. and Graupner, R. and Ley, L. and Mikalo, Ricardo Pablo and Batchelor, David R. and Schmeißer, Dieter}, title = {PES and LEED study of hydrogen and oxygen terminated 6H-SiC(0001) and (000-1) surfaces}, language = {de} } @article{BatchelorHoffmannSchmeisser, author = {Batchelor, David R. and Hoffmann, Patrick and Schmeißer, Dieter}, title = {Photoemission study of Aluminium Steel cold welded joints}, abstract = {Aluminium and Stainless Steel bi-metal material is extremely versatile and is used in a wide range of products; from cooking utensils to high technology applications such as automobile manufacture and Synchrotron radiation instrumentation. As a consequence of this wide range of applications the study of the formation of Aluminium Steel junctions and the bonding mechanism is of considerable industrialimportance [1-3].In a previous publication [4] evidence for a chemical bond, alloying at the interface was found. As the monochromator focus and welded region are similar in size about 200 µm (the actual interface from SEM is an order of magnitude smaller) a simple photoemission experiment of translating the sample perpendicular (vertically, weld horizontal) to the weld and measuring spectra was performed.}, language = {en} } @misc{BeerbomMayerJaegermannetal., author = {Beerbom, Martin and Mayer, Thomas and Jaegermann, Wolfram and Batchelor, David R. and Schmeißer, Dieter}, title = {Synchrotron-induced photoemission of GaAs electrodes after electrochemical treatment in aqueous electrolytes}, abstract = {Electrochemically-induced oxidation and reduction reactions of UHV-cleaved GaAs(110) surfaces have been studied after emersion under potential control using highresolution synchrotron-induced photoelectron spectroscopy. High quality spectra of the As and Ga core 3d lines and the valence band region have been obtained. Thespectra of the anodic oxide show strong emission of bulk-like Ga2O3 and some As2O3 with the admixture of suboxides and hydroxides. Ga2O3 and As2O3 arecathodically reduced leaving the GaAs surface covered mostly with elemental As, some As-H and remnants of Ga-suboxides and -hydroxides.}, language = {en} } @article{BatchelorFollathSchmeisser, author = {Batchelor, David R. and Follath, Rolf and Schmeißer, Dieter}, title = {Commissioning Results of the BTUC-PGM beamline}, language = {en} } @misc{HoffmannMikaloYfantisetal., author = {Hoffmann, Patrick and Mikalo, Ricardo Pablo and Yfantis, Alexandros D. and Batchelor, David R. and Appel, G{\"u}nter and Schmeißer, Dieter}, title = {A Spectro-Microscopic Approach for Thin Film Analysis Grain Boundaries in mc-Si and Sn/SnO2 Nano Particles}, series = {Microchimica Acta}, volume = {136}, journal = {Microchimica Acta}, number = {3-4}, issn = {1436-5073}, pages = {109 -- 113}, language = {en} } @article{MikaloHoffmannBatcheloretal., author = {Mikalo, Ricardo Pablo and Hoffmann, Patrick and Batchelor, David R. and Schmeißer, Dieter and Lloyd Spetz, Anita and Lundstr{\"o}m, Ingemar}, title = {Comparison of HF and ozone treated SiC surfaces}, language = {en} } @article{SieberMantelSeylleretal., author = {Sieber, N. and Mantel, B. F. and Seyller, Th. and Ristein, J. and Ley, L. and Heller, Thomas and Batchelor, David R. and Schmeißer, Dieter}, title = {Electronic and chemical passivation of hexagonal 6H-SiC surfaces by hydrogen termination}, language = {en} } @inproceedings{BatchelorBergSimonetal., author = {Batchelor, David R. and Berg, A. and Simon, Sylvio and Wagner, Lothar and Viehweger, Bernd and Schmeißer, Dieter}, title = {Development of Joining Techniques through Pressforming of Steel and Aluminium}, language = {en} } @inproceedings{HuleaHoffmannBrinzaetal., author = {Hulea, Iulian and Hoffmann, Patrick and Brinza, Monica and Batchelor, David R. and Schmeißer, Dieter}, title = {The interface of friction-welded Al-Fe joints. ATB Metallurgy}, language = {en} } @article{ZiminaBatchelorEisebittetal., author = {Zimina, A. and Batchelor, David R. and Eisebitt, S. and Schmeißer, Dieter and Shukalov, A. and Eberhardt, W.}, title = {Soft X-ray emission electron microscopy: chemical state microscopy from interface and bulk}, language = {en} } @misc{BeerbomMayerJaegermannetal., author = {Beerbom, Martin and Mayer, Thomas and Jaegermann, Wolfram and Batchelor, David R. and Schmeißer, Dieter}, title = {Electrochemically Induced Redox-Reactions on GaAs-Surfaces: High Resolution Photoemission Spectra Taken at the U49/2 Beamline}, language = {en} } @article{HoffmannMikaloBatcheloretal., author = {Hoffmann, Patrick and Mikalo, Ricardo Pablo and Batchelor, David R. and Schmeißer, Dieter and Soinski, M. S. and Follath, Rolf}, title = {The chromatic aberration of PEEM - demonstration on graphite inclusions in cast iron, Kategrorie: Microscopy - Spectromicroscopy}, language = {en} } @article{SieberMantelSeylleretal., author = {Sieber, N. and Mantel, B. F. and Seyller, Th. and Ristein, J. and Ley, L. and Heller, Thomas and Batchelor, David R. and Schmeißer, Dieter}, title = {Structural, electronic and chemical properties of hydrogen terminated 6H-SiC}, language = {en} } @article{HoffmannMikaloBatcheloretal., author = {Hoffmann, Patrick and Mikalo, Ricardo Pablo and Batchelor, David R. and Schmeißer, Dieter and Follath, Rolf}, title = {N2O-Oxidation of Si(100)}, language = {en} } @article{MikaloHoffmannBatcheloretal., author = {Mikalo, Ricardo Pablo and Hoffmann, Patrick and Batchelor, David R. and Schmeißer, Dieter}, title = {Valence band spectroscopy of semiconducting regioregular Poly(3-Hexylthiophene)-2,5-diyl}, language = {en} } @article{KraftThissenMayeretal., author = {Kraft, D. and Thißen, A. and Mayer, Thomas and Klein, A. and Jaegermann, Wolfram and Hoffmann, Patrick and Batchelor, David R. and Schmeißer, Dieter}, title = {Backcontact Formation on CdTe Thin Film Solar Cells}, language = {en} } @article{BatchelorScheerSchmeisser, author = {Batchelor, David R. and Scheer, M. and Schmeißer, Dieter}, title = {WAVE Calculations of Off Axis Undulator Radiation for the BESSY II U49 Undulator}, language = {en} } @inproceedings{HoffmannMikaloBatcheloretal., author = {Hoffmann, Patrick and Mikalo, Ricardo Pablo and Batchelor, David R. and Beuckert, Guido and Schmeißer, Dieter and Kittler, Martin and Ourmazd, A. and Lewerenz, Hans-Joachim}, title = {Solare Energieumwandlung in d{\"u}nnen Schichten}, language = {de} } @inproceedings{HoffmannBatchelorSchmeisser, author = {Hoffmann, Patrick and Batchelor, David R. and Schmeißer, Dieter}, title = {Spectro-Microscopic analyses in metallurgical systems: spheroidic graphite in cast iron and the interface of friction-welded Al-Fe joints}, language = {en} } @article{SchmeisserAppelBoehmeetal., author = {Schmeißer, Dieter and Appel, G{\"u}nter and B{\"o}hme, O. and Heller, Thomas and Mikalo, Ricardo Pablo and Hoffmann, Patrick and Batchelor, David R.}, title = {Nanoparticles and polarons: active centers in thin film sensor devices}, language = {de} } @misc{BatchelorSchmeisserFollath, author = {Batchelor, David R. and Schmeißer, Dieter and Follath, Rolf}, title = {The BTU Cottbus Beamline at BESSY II}, language = {de} } @article{SchmeisserBoehmeYfantisetal., author = {Schmeißer, Dieter and B{\"o}hme, O. and Yfantis, Alexandros D. and Heller, Thomas and Batchelor, David R. and Lundstr{\"o}m, Ingemar and Lloyd Spetz, Anita}, title = {Dipole moment of nanoparticles at interfaces}, language = {de} } @article{MikaloHoffmannHelleretal., author = {Mikalo, Ricardo Pablo and Hoffmann, Patrick and Heller, Thomas and Batchelor, David R. and Appel, G{\"u}nter and Schmeißer, Dieter}, title = {Doping and defect inhomogeneities of polypyrrole tosylate films as revealed by ?-NEXAFS}, language = {en} } @article{BatchelorFollathSchmeisser, author = {Batchelor, David R. and Follath, Rolf and Schmeißer, Dieter}, title = {The optical design of a PGM for the Undulator U49/2 at BESSY II}, language = {en} } @article{BatchelorFollathMikaloetal., author = {Batchelor, David R. and Follath, Rolf and Mikalo, Ricardo Pablo and Hoffmann, Patrick and Schmeißer, Dieter}, title = {Commissioning Results of the BTUC-PGM beamline}, language = {en} } @inproceedings{BatchelorHoffmannSchmeisseretal., author = {Batchelor, David R. and Hoffmann, Patrick and Schmeißer, Dieter and Hulea, Iulian and Brinza, Monica}, title = {The Al-Fe interface of friction-welded joints}, series = {Verhandlungen der Deutschen Physikalischen Gesellschaft}, booktitle = {Verhandlungen der Deutschen Physikalischen Gesellschaft}, publisher = {Deutsche Physikalische Gesellschaft}, address = {Bad Honnef}, abstract = {The interface region of friction-welded joints Al-Fe samples is investigated by scanning Auger Spectroscopy, Electron Probe Micro-analysis (EPMA), X-ray Photoelectron spectroscopy, and Photoemission Electron Microscopy, performed at the synchrotron light source (BESSY). We investigated polished samples cut to obtain a cross-section of the Al-Fe joints. At the Al-Fe interface there is a small number of Fe teeth protuding into the adjacent Al-matrix. Beside this mechanical interlock mechanism we identify an Fe-Al alloy which is formed in an almost homogeneous interface layer of approximately 80 micron thickness. We determine the valence band spectra within that layer and notice that the alloying formation is limited to the interface region. In addition, the profile of both, the Fe and O distribution within the Al next to that interface is determined. A model of the friction-welding mechanism is derived and discussed in terms of the ability of achieving low temperature Fe-Al joints.}, language = {en} } @inproceedings{BatchelorFollathSchmeisser, author = {Batchelor, David R. and Follath, Rolf and Schmeißer, Dieter}, title = {Design of a PGM for the U49/2 Undulator at BESSY II}, series = {Verhandlungen der Deutschen Physikalischen Gesellschaft}, booktitle = {Verhandlungen der Deutschen Physikalischen Gesellschaft}, publisher = {Deutsche Physikalische Gesellschaft}, address = {Bad Honnef}, abstract = {This poster describes the beamline proposed for the BESSY II U49/2 Undulator by the Collaborating Research Group of BTU Cottbus, HMI Berlin and the TU Darmstadt. The beamline is designed with both high resolution electron spectroscopy, valence band measurements and PEEM in mind and utilises the wide energy range of the U49 Undulator 40-1500eV. The design chosen is based on a Petersen PGM [1] but with the grating illuminated with parallel light [2]. This modification allows variation of the monochromator higher order content or resolution, spot size without changing the focus. The performance of the beamline was investigated using various programs available at BESSY. The Undulator character- istics were evaluated using both SMUT and WAVE, and the optical performance of the monochromator was checked using REFLEC and RAY. The calculations show a resolving power of 2×104 with a flux of the order 1013 photons s-1 over the energy range covered by the mono- chromator. The maximum nominal second order contributions are ≈ 2\% at 300 eV for the first Undulator harmonic and ≈ 9\% for the third harmonic at 500 eV, both of which can be reduced by increasing the grating incidence angle and, or decreasing the Undulator Pinhole size.}, language = {en} }