Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-52380 Zeitschriftenartikel Reed, B. P.; Cant, D.J.H.; Spencer, S.J.; Carmona-Carmona, A. J.; Bushell, A.; Herrara-Gómez, A.; Kurokawa, A.; Thissen, A.; Thomas, A.G.; Britton, A.J.; Bernasik, A.; Fuchs, A.; Baddorf, A.P.; Bock, B.; Thellacker, B.; Cheng, B.; Castner, D.G.; Morgan, D.J.; Valley, D.; Willneff, E.A.; Smith, E.P.; Nolot, E.; Xie, F.; Zorn, G.; Smith, G.C.; Yasukufu, H.; Fenton, J.L.; Chen, J.; Counsell, J.D.P.; Radnik, Jörg; Gaskell, K.J.; Artyushkova, K.; Yang, L.; Zhang, L.; Eguchi, M.; Walker, M.; Hajdyla, M.; Marzec, M.M.; Linford, M.R.; Kubota, N.; Cortazar-Martinez, O.; Dietrich, P.; Satoh, R.; Schroeder, S.L.M.; Avval, T.G.; Nagatomi, T.; Fernandez, V.; Lake, W.; Azuma, Y.; Yoshikawa, Y.; Compean-Gonzalez, C.L.; Ceccone, G.; Shard, A.G. ERRATUM: "Versailles project on advanced materials and standards interlaboratory study on intensity calibration for x-ray photoelectron spectroscopy instruments using low-density polyethylene" [J. Vac. Sci. Technol. A 38, 063208 (2020)] The lead authors failed to name two collaborators as co-authors. The authors listed should include: Miss Claudia L. Compean-Gonzalez (ORCID: 0000-0002-2367-8450) and Dr. Giacomo Ceccone (ORCID: 0000-0003-4637-0771). These co-authors participated in VAMAS project A27, provided data that were analyzed and presented in this publication (and supporting information), and reviewed the manuscript before submission. American Vacuum Society 2021 Journal of Vacuum Science & Technology A 39 2 027001 10.1116/6.0000907 2021-04-07 OPUS4-21045 Zeitschriftenartikel Kim, K.J.; Kim, J.W.; Moon, D.W.; Wirth, Thomas; Hodoroaba, Vasile-Dan; Gross, Thomas; Unger, Wolfgang; Jordaan, W.; Staden, M.v.; Prins, S.; Wang, H.; Song, X.; Zhang, L.; Fujimoto, T.; Kojima, I. Final report on key comparison K67 and parallel pilot study P108: measurement of composition of a thin Fe-Ni alloy film The Key Comparison K67 and the parallel Pilot Study P108 on quantitative analysis of thin alloy films have been completed in the Surface Analysis Working Group (SAWG) of the Consultative Committee for Amount of Substance (CCQM). The aim of these inter-laboratory comparisons is to determine the degree of equivalence in the measurement capability of national metrology institutes (NMIs) and designated institutes (DIs) for the determination of the composition of thin alloy films. The measurand is expressed in atomic percent. A Fe-Ni alloy film with a certified composition was available for the participants of the inter-laboratory comparison. It has been used as a reference specimen to determine the relative sensitivity factors (RSF) of Fe and Ni for the different analytical methods used by the participants to determine the composition of the test sample. As was shown in the preceding Pilot Study P98, the degrees of equivalence in the measurement capabilities of the participants can be improved in that way. The composition of the reference specimen was certified by inductively coupled plasma mass spectrometry (ICP-MS) using the isotope dilution method. The in-depth and lateral homogeneity, determined in terms of elemental composition, of the certified reference sample and the unknown test sample were confirmed by secondary ion mass spectrometry (SIMS) using C60 primary ions by the leading laboratory. Five laboratories participated in the key comparison. Four of them used x-ray photoelectron spectroscopy (XPS) and one Auger electron spectroscopy (AES). One laboratory participated in the parallel P108 pilot study using electron probe micro analysis with an energy-dispersive spectrometer (ED EPMA) and XPS. Bristol Inst. of Physics Publ. 2010 Metrologia 47 1A 08011-1 - 08011-15 10.1088/0026-1394/47/1A/08011 2016-02-19 OPUS4-37163 Beitrag zu einem Tagungsband Na, S.-J.; Han, S.-W.; Muhammad, S.; Zhang, L.; Gumenyuk, Andrey; Rethmeier, Michael; Karhu, M.; Kujanpa, V. Flow and Bead Formation Characteristics in High Power Laser Welding at Different Welding Positions (Invited Talk) The numerical simulations of high power laser keyhole welding at different welding positions are performed by using Volume-Of-Fluid (VOF) method. The main material is SS400. The multi-physics phenomenon is considered using several models, such as the heat flux of Gaussian heat source, the recoil pressure with Clausisus-Clapeyron equation, the Marangoni flow considering temperature gradient, the buoyancy force with Boussinesq approximation, the additional shear stress and heat source due to metallic vapor ejected through keyhole entrance, the bubble formation assumed as adiabatic bubble, and the multiple-reflection by solving proper discriminant, are used. To analyze the fluid flow pattern, the concept of streamline formed by reconstructing the value of the velocity vector is applied. Partial and full penetration cases at different welding positions are considered. The welding position seems to have only a minor influence on bead formation characteristics in both cases. This is probably due to the fact that the recoil pressure has a major influence when compared to other driving forces. The flow characteristics and fluid velocity in weld pool are analyzed to compare the gravity direction effect at different welding positions. It is observed that the clockwise flow pattern is mainly formed by the recoil pressure on the keyhole surface in the case of partial penetration. The laser energy can't maintain the whole weld pool when the weld pool size becomes too large. And then the solidification starts from the middle part of weld pool and a necked weld pool shape is formed. In the full penetration welding, the weld pool flow patterns are affected by the leakage of laser power through the full penetration keyhole and also by surface tension. Furthermore, the numerical simulation of full penetration welding with AISI316L is also performed to analyze the effect of material properties. The weld bead shapes obtained by simulations were compared with the corresponding experimental results to confirm the validity of the process models adopted and the CFD simulation tool. 2015 Lasers in Manufacturing Conference 2015 Lasers in Manufacturing Conference 2015 München, Germany 22.06.2015 25.06.2015 1 6 2016-08-23 OPUS4-24505 Zeitschriftenartikel Kim, K.J.; Unger, Wolfgang; Kim, J.W.; Moon, D.W.; Gross, Thomas; Hodoroaba, Vasile-Dan; Schmidt, Dieter; Wirth, Thomas; Jordaan, W.; van Staden, M.; Prins, S.; Zhang, L.; Fujimoto, T.; Song, X.P.; Wang, H. Inter-laboratory comparison: quantitative surface analysis of thin Fe-Ni alloy films An international interlaboratory comparison of the measurement capabilities of four National Metrology Institutes (NMIs) and one Designated Institute (DI) in the determination of the chemical composition of thin Fe-Ni alloy films was conducted via a key comparison (K-67) of the Surface Analysis Working Group of the Consultative Committee for Amount of Substance. This comparison was made using XPS (four laboratories) and AES (one laboratory) measurements. The uncertainty budget of the measured chemical composition of a thin alloy film was dominated by the uncertainty of the certified composition of a reference specimen which had been determined by inductively coupled plasma mass spectrometry using the isotope dilution method. Pilot study P-98 showed that the quantification using relative sensitivity factors (RSFs) of Fe and Ni derived from an alloy reference sample results in much more accurate result in comparison to an approach using RSFs derived from pure Fe and Ni films. The individual expanded uncertainties of the participants in the K-67 comparison were found to be between 2.88 and 3.40 atomic %. The uncertainty of the key comparison reference value (KCRV) calculated from individual standard deviations and a coverage factor (k) of 2 was 1.23 atomic %. Chichester Wiley 2012 Surface and interface analysis 44 2 192 199 10.1002/sia.3795 2016-02-19 OPUS4-44792 Zeitschriftenartikel Zhang, L.; Kannengießer, Thomas lnfluence of microalloy design on heat-affected zone toughness of S690QL steels Three high-strength Nb-,.Ti- and Ti+ V-bearing S690QL steels were welded to investigate and compare the effects of microalloy addition on heat-affected zone (HAZ) toughness. Charpy V notch impact tests from three microalloyed welds under different cooling rates have been performed. Fractographic examination shows that several factors, including large-sized grain, upper bainite or hard second phase, interact to determine brittle fracture and impaired toughness in Nb-bearing weld with high heat input. In contrast to this reduced toughness, Ti-bearing welds exhibits satisfied toughness regardless of at fast or slow cooling. This is attributed to its limited austenite grain and refines favorable intragranular acicular ferrite structure. Moreover, in the case of such refined structure as matrix, TiN particles are found to be irrelevant to the facture process. The crystallographic results also confirm that high-angle boundaries between fine ferrites plates provide effective barriers for crack propagation and contribute to improved toughness. Heidelberg, Germany Springer 2018 Welding in the World 62 2 339 350 10.1007/s40194-018-0558-x 2018-04-26 OPUS4-30549 Zeitschriftenartikel Zhang, L. J.; Zhang, J. X.; Gumenyuk, Andrey; Rethmeier, Michael; Na, S.J. Numerical simulation of full penetration laser welding of thick steel plate with high power high brightness laser Full penetration laser welding was carried out on a 10 mm steel plate using a 16 kW maximum power continuous wave thin disk laser. Upper surface and lower surface of molten pool were observed synchronously with two high speed CCD cameras during the welding process. The lower surface was much longer and more unstable than the upper one. A three dimensional laser deep penetration welding model in which volume of fluid (VOF) method was combined with a ray-tracing algorithm was used to simulate the dynamic coupling between keyhole and molten pool in laser full penetration welding. The calculated weld cross-section morphology and molten pool length on both upper side and lower side agree well with experimental results. Evolution of molten pool in lower side during full penetration laser welding was analyzed, periodical features of energy coupling, molten pool behavior and keyhole dynamics in laser full penetration welding were identified and discussed. Amsterdam Elsevier 2014 Journal of materials processing technology 214 8 1710 1720 10.1016/j.jmatprotec.2014.03.016 2016-02-20 OPUS4-49835 Zeitschriftenartikel Liu, H.; Song, W.; Gröninger, Delia; Zhang, L.; Lu, Y.; Chan, K. S.; Zhou, Z.; Rurack, Knut; Shen, Z. Real-time monitoring of newly acidified organelles during autophagy enabled by reaction-based BODIPY dyes Real-time monitoring of newly acidified organelles during autophagy in living cells is highly desirable for a better understanding of intracellular degradative processes. Herein, we describe a reaction-based boron dipyrromethene (BODIPY) dye containing strongly electron-withdrawing diethyl 2-cyanoacrylate groups at the α-positions. The probe exhibits intense red fluorescence in acidic organelles or the acidified cytosol while negligible fluorescence in other regions of the cell. The underlying mechanism is a nucleophilic reaction at the central meso-carbon of the indacene core, resulting in the loss of π-conjugation entailed by dramatic spectroscopic changes of more than 200 nm between its colorless, non-fluorescent leuco-BODIPY form and its red and brightly emitting form. The reversible transformation between red fluorescent BODIPY and leuco-BODIPY along with negligible cytotoxicity qualifies such dyes for rapid and direct intracellular lysosome imaging and cytosolic acidosis detection simultaneously without any washing step, enabling the real-time monitoring of newly acidified organelles during autophagy. London Nature Research 2019 Communications Biology 2 442 urn:nbn:de:kobv:b43-498358 10.1038/s42003-019-0682-1 https://creativecommons.org/licenses/by/4.0/deed.de 2019-12-02 OPUS4-54175 Zeitschriftenartikel Kim, K.J.; Kim, C.S.; Ruh, S. W.; Unger, Wolfgang; Radnik, Jörg; Mata-Salazar, J.; Juarez-Garcia, J.M.; Cortazar-Martinez, O.; Herrera-Gomez, A.; Hansen, P.E.; Madesen, J.S.; Senna, C.A.; Archanjo, B.S.; Damasceno, J.C.; Achete, C.A.; Wang, H.; Wang, M.; Windover, D.; Steel, E.; Kurokawa, A.; Fujimoto, T.; Azuma, Y.; Terauchi, S.; Zhang, L.; Jordaan, W.A.; Spencer, S.J.; Shard, A.G.; Koenders, L.; Krumrey, M.; Busch, I.; Jeynes, C. Thickness measurement of nm HfO2 films A pilot study for the thickness measurement of HfO2 films was performed by the Surface Analysis Working Group (SAWG) of the Consultative Committee for Amount of Substance (CCQM). The aim of this pilot study was to ensure the equivalency in the measurement capability of national metrology institutes for the thickness measurement of HfO2 films. In this pilot study, the thicknesses of six HfO2 films with nominal thickness from 1 nm to 4 nm were measured by X-ray Photoelectron Spectroscopy (XPS), X-ray Reflectometry(XRR), X-ray Fluorescence Analysis (XRF), Transmission Electron Spectroscopy (TEM), Spectroscopic Ellipsometry (SE) and Rutherford Backscattering Spectrometry (RBS). The reference thicknesses were determined by mutual calibration of a zero-offset method (Medium Energy Ion Scattering Spectroscopy (MEIS) of KRISS) and a method traceable to the length unit (the average thicknesses of three XRR data except the thinnest film). These reference thicknesses are traceable to the length unit because they are based on the traceability of XRR. For the thickness measurement by XPS, the effective attenuation length of Hf 4f electrons was determined. In the cases of XRR and TEM, the offset values were determined from a linear fitting between the reference thicknesses and the individual data by XRR and TEM. The amount of substance of HfO2, expressed as thickness of HfO2 films (in both linear and areal density units), was found to be a good subject for a CCQM key comparison. To reach the main text of this paper, click on Final Report. The final report has been peer-reviewed and approved for publication by the CCQM. Bristol IOP Publishing Lt. 2021 Metrologia 58 1a 08016 10.1088/0026-1394/58/1A/08016 2022-01-03 OPUS4-51655 Zeitschriftenartikel Reed, B. P.; Cant, D.J.H.; Spencer, J.; Carmona-Carmona, A. J.; Bushell, A.; Herrara-Gómez, A.; Kurokawa, A.; Thissen, A.; Thomas, A.G.; Britton, A.J.; Bernasik, A.; Fuchs, A.; Baddorf, A. P.; Bock, B.; Thellacker, B.; Cheng, B.; Castner, D.G.; Morgan, D.J.; Valley, D.; Willneff, E.A.; Smith, E.F.; Nolot, E.; Xie, F.; Zorn, G.; Smith, G.C.; Yasukufu, H.; Fenton, J. L.; Chen, J.; Counsell, J..D.P.; Radnik, Jörg; Gaskell, K.J.; Artyushkova, K.; Yang, L.; Zhang, L.; Eguchi, M.; Walker, M.; Hajdyla, M.; Marzec, M.M.; Linford, M.R.; Kubota, N.; Cartazar-Martínez, O.; Dietrich, P.; Satoh, R.; Schroeder, S.L.M.; Avval, T.G.; Nagatomi, T.; Fernandez, V.; Lake, W.; Azuma, Y.; Yoshikawa, Y.; Shard, A.G. Versailles Project on Advanced Materials and Standards interlaboratory study on intensity calibration for x-ray photoelectron spectroscopy instruments using low-density polyethylene We report the results of a Versailles Project on Advanced Materials and Standards interlaboratory study on the intensity scale calibration of x-ray photoelectron spectrometers using low-density polyethylene (LDPE) as an alternative material to gold, silver, and copper. An improved set of LDPE reference spectra, corrected for different instrument geometries using a quartz-monochromated Al Kα x-ray source, was developed using data provided by participants in this study. Using these new reference spectra, a transmission function was calculated for each dataset that participants provided. When compared to a similar calibration procedure using the NPL reference spectra for gold, the LDPE intensity calibration method achieves an absolute offset of ∼3.0% and a systematic deviation of ±6.5% on average across all participants. For spectra recorded at high pass energies (≥90 eV), values of absolute offset and systematic deviation are ∼5.8% and ±5.7%, respectively, whereas for spectra collected at lower pass energies (<90 eV), values of absolute offset and systematic deviation are ∼4.9% and ±8.8%, respectively; low pass energy spectra perform worse than the global average, in terms of systematic deviations, due to diminished count rates and signal-to-noise ratio. Differences in absolute offset are attributed to the surface roughness of the LDPE induced by sample preparation. We further assess the usability of LDPE as a secondary reference material and comment on its performance in the presence of issues such as variable dark noise, x-ray warm up times, inaccuracy at low count rates, and underlying spectrometer problems. In response to participant feedback and the results of the study, we provide an updated LDPE intensity calibration protocol to address the issues highlighted in the interlaboratory study. We also comment on the lack of implementation of a consistent and traceable intensity calibration method across the community of x-ray photoelectron spectroscopy (XPS) users and, therefore, propose a route to achieving this with the assistance of instrument manufacturers, metrology laboratories, and experts leading to an international standard for XPS intensity scale calibration. American Vacuum Society 2020 Journal of Vacuum Science & Technology A 38 6 063208 10.1116/6.0000577 2020-11-26