Hoffmann-Urlaub, Sarah

[["dc.bibliographiccitation.firstpage","2002049"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Advanced Materials Interfaces"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Hoffmann-Urlaub, Sarah"],["dc.contributor.author","Ross, Ulrich"],["dc.contributor.author","Hoffmann, Jörg"],["dc.contributor.author","Belenchuk, Alexandr"],["dc.contributor.author","Shapoval, Oleg"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Ma, Qian"],["dc.contributor.author","Kressdorf, Birte"],["dc.contributor.author","Moshnyaga, Vasily"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2021-04-14T08:29:32Z"],["dc.date.available","2021-04-14T08:29:32Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract Interest in layered Ruddlesden–Popper (RP) strongly correlated manganites of Pr0.5Ca1.5MnO4 as well as in their thin film polymorphs is motivated by the high temperature of charge orbital ordering above room temperature. The c‐axis orientation in epitaxial films is tailored by different SrTiO3 (STO) substrate orientations and CaMnO3 (CMO) buffer layers. Films on STO(110) show in‐plane alignment of the c‐axis parallel to the [100] direction. On STO(100), two possible directions of the in‐plane c‐axis lead to a mosaic like, quasi 2D nanostructure, consisting of RP, rock‐salt, and perovskite blocks. With the CMO buffer layer, Pr0.5Ca1.5MnO4 epitaxial films with c‐axis out‐of‐plane are realized. Different physical vapor deposition techniques as ion beam sputtering, pulsed laser deposition and metalorganic aerosol deposition are applied in order to distinguish effects of growth conditions from intrinsic epitaxial properties. Despite their very different growth conditions, surface morphology, crystal structure, and orientation of the thin films reveal a high level of similarity as verified by X‐ray diffraction, scanning, and high resolution transmission electron microscopy. For different epitaxial relations stress in the films is relaxed by means of modified interface chemistry. The charge ordering in the films occurs at a temperature close to that expected in bulk material."],["dc.description.abstract","The growth direction of a Ruddlesden–Popper Pr0.5Ca1.5MnO4 thin film is governed by its strain state. For different SrTiO3 substrate orientations the unit cells of the film are aligned in parallel or in a perpendicular configuration—forming a mosaic like microstructure. With a CaMnO3 buffer layer the c‐axis can even be tilted to the out‐of‐plane direction. image"],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659"],["dc.identifier.doi","10.1002/admi.202002049"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/82926"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation","SFB 1073 | Topical Area B | B02 Photonen-getriebener Energietransfer über Grenzflächen zwischen Materialien mit starken Korrelationen"],["dc.relation","SFB 1073 | Topical Area Z | Z02 Hochauflösende Charakterisierung von Grenzflächen"],["dc.relation.eissn","2196-7350"],["dc.relation.issn","2196-7350"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made."],["dc.title","Tailoring c-axis orientation in epitaxial Ruddlesden-Popper Pr0.5Ca1.5MnO4 films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","135"],["dc.bibliographiccitation.journal","Microelectronic Engineering"],["dc.bibliographiccitation.lastpage","138"],["dc.bibliographiccitation.volume","164"],["dc.contributor.author","Hoffmann-Urlaub, Sarah"],["dc.contributor.author","Hoehne, Philipp"],["dc.contributor.author","Kanbach, Mike"],["dc.contributor.author","Salditt, Tim"],["dc.date.accessioned","2017-09-07T11:44:34Z"],["dc.date.available","2017-09-07T11:44:34Z"],["dc.date.issued","2016"],["dc.description.abstract","This paper reports on the fabrication of X-ray waveguides, manufactured by e-beam lithography, reactive ion etching and wafer bonding techniques. By combination of these processing steps, long empty (air) channels with cross-sections in the range of 10 to 100 nm are obtained, forming a guiding layer, surrounded by a solid state cladding. Aside from silicon, we present also waveguide channels fabricated in germanium and quartz. The improved fabrication protocols lead to significantly enhanced exit flux for imaging applications. Finally, we address not only straight channels, but a large variety of various geometries, as required for different applications. (C) 2016 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.mee.2016.07.010"],["dc.identifier.gro","3141608"],["dc.identifier.isi","000384855900022"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/679"],["dc.notes.intern","WoS Import 2017-03-10 / Funder: Helmholtz Society [VH-VI-403]; DESY [P10]; ESRF [ID01, BM20]"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.eissn","1873-5568"],["dc.relation.issn","0167-9317"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray optics"],["dc.title","Advances in fabrication of X-ray waveguides"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","884802"],["dc.bibliographiccitation.volume","8848"],["dc.contributor.author","Osterhoff, Markus"],["dc.contributor.author","Bartels, Matthias"],["dc.contributor.author","Döring, Florian"],["dc.contributor.author","Eberl, Christian"],["dc.contributor.author","Hoinkes, Thomas"],["dc.contributor.author","Hoffmann-Urlaub, Sarah"],["dc.contributor.author","Liese, Tobias"],["dc.contributor.author","Radisch, Volker"],["dc.contributor.author","Rauschenbeutel, Arno"],["dc.contributor.author","Robisch, Anna Lena"],["dc.contributor.author","Ruhlandt, Aike"],["dc.contributor.author","Schlenkrich, Felix"],["dc.contributor.author","Salditt, Tim"],["dc.contributor.author","Krebs, Hans Ulrich"],["dc.contributor.editor","Goto, Shunji"],["dc.contributor.editor","Morawe, Christian"],["dc.contributor.editor","Khounsary, Ali"],["dc.date.accessioned","2020-02-24T13:39:51Z"],["dc.date.available","2020-02-24T13:39:51Z"],["dc.date.issued","2013"],["dc.description.abstract","We present experiments carried out using a combined hard x-ray focusing set-up preserving the benefits of a large-aperture Kirckpatrick-Baez (KB) mirror system and a small focal length multilayer zone plane (MZP). The high gain KB mirrors produce a pre-focus of 400 nm × 200 nm; in their defocus, two MZP lenses of diameter of 1.6 μm and 3.7 μm have been placed, with focal lengths of 50 μm and 250 μm respectively. The lenses have been produced using pulsed laser deposition (PLD) and focused ion beam (FIB). Forward simulations including error models based on measured deviations, auto-correlation analysis and three-plane phase reconstruction support two-dimensional focus sizes of 4.3 nm × 4.7 nm (7:9 keV, W/Si)1 and 4.3 nm ×5.9 nm (13:8 keV, W/ZrO2), respectively."],["dc.identifier.doi","10.1117/12.2025389"],["dc.identifier.gro","3145113"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/2814"],["dc.language.iso","en"],["dc.notes.intern","Crossref Import"],["dc.notes.status","final"],["dc.relation.conference","SPIE"],["dc.relation.crisseries","Proceedings of SPIE"],["dc.relation.eventend","2013-08-28"],["dc.relation.eventlocation","San Diego"],["dc.relation.eventstart","2013"],["dc.relation.isbn","978-0-8194-9698-0"],["dc.relation.ispartof","Advances in X-ray/EUV optics and components VIII"],["dc.relation.ispartofseries","Proceedings of SPIE; 8848"],["dc.relation.issn","0277-786X"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray optics"],["dc.title","Two-dimensional sub-5-nm hard x-ray focusing with MZP"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","515"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Acta Crystallographica. Section A, Foundations and Advances"],["dc.bibliographiccitation.lastpage","522"],["dc.bibliographiccitation.volume","72"],["dc.contributor.author","Hoffmann-Urlaub, Sarah"],["dc.contributor.author","Salditt, Tim"],["dc.date.accessioned","2020-12-10T18:26:01Z"],["dc.date.available","2020-12-10T18:26:01Z"],["dc.date.issued","2016"],["dc.description.abstract","This paper reports on the fabrication and characterization of X-ray waveguide beamsplitters. The waveguide channels were manufactured by electron-beam lithography, reactive ion etching and wafer bonding techniques, with an empty (air) channel forming the guiding layer and silicon the cladding material. A focused synchrotron beam is efficiently coupled into the input channel. The beam is guided and split into two channels with a controlled (and tunable) distance at the exit of the waveguide chip. After free-space propagation and diffraction broadening, the two beams interfere and form a double-slit interference pattern in the far-field. From the recorded far-field, the near-field was reconstructed by a phase retrieval algorithm (error reduction), which was found to be extremely reliable for the two-channel setting. By numerical propagation methods, the reconstructed field was then propagated along the optical axis, to investigate the formation of the interference pattern from the two overlapping beams. Interestingly, phase vortices were observed and analysed."],["dc.identifier.doi","10.1107/S205327331601144X"],["dc.identifier.eissn","2053-2733"],["dc.identifier.gro","3141627"],["dc.identifier.isi","000383913000001"],["dc.identifier.pmid","27580200"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75915"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","2053-2733"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray optics"],["dc.title","Miniaturized beamsplitters realized by X-ray waveguides"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.seriesnr","19"],["dc.contributor.author","Hoffmann-Urlaub, Sarah"],["dc.date.accessioned","2018-05-03T10:47:45Z"],["dc.date.available","2018-05-03T10:47:45Z"],["dc.date.issued","2017"],["dc.description.abstract","Modern x-ray sources and analysis techniques such as lens less imaging combined with phase retrieval algorithms allow for resolving structure sizes in the nanometer range. For this purpose optics have to be employed, ensuring small focal spot dimensions simultaneously with high photon densities. Furthermore, the wave front behind the optics is required to be smooth enabling for high resolution imaging. Combining all these properties, x-ray waveguides are well suited to perform this task, since the intensity distribution behind the guide is restricted in two dimensions serving as a secondary quasi point-source without wave-front aberrations, showing also a high divergence, suitable for resolving fine features. Importantly, the radiation provided by the waveguide reveals a high degree of coherence, required by many imaging techniques. The waveguide itself consists of an air-filled channel embedded in a solid matrix; typical materials are silicon, germanium or quartz. While the entrance area is nano-sized, the channel length is in the millimeter-range, this way posing challenges to fabricate high aspect ratio geometries. Since the functioning of x-ray waveguides is based on the total reflection at small incident angles, the surface roughness of the channel walls must be as low as possible to avoid scattering and hence loss of intensity. To fulfill these demanding conditions, a process scheme involving spin-coating, electron beam lithography, wet development, reactive ion etching and wafer bonding is optimized within this work. To gain deeper insights into the principle of wave guiding finite difference simulations are performed, also opening access for advanced design considerations such as gratings, tapered and curved channels, or beamsplitters, enabling for constructing novel x-ray tools as for example time delay devices or interferometers. Waveguides in all geometries are tested at synchrotron sources, accomplishing new benchmarks in x-ray optical performance. Here, the x-ray beam leaving the channel, propagates out to a pixel array detector in the far-field region. From the recorded data the intensity distribution in the near-field directly behind the waveguide is reconstructed, revealing an outstanding agreement with the simulations and electron micrographs. Since the radiation field of the waveguide is well-characterized and also tunable to meet the requirements of both the measurement setup and the sample, they are suited of a broad field of applications in coherent x-ray imaging."],["dc.format.extent","132"],["dc.identifier.doi","10.17875/gup2017-1024"],["dc.identifier.isbn","978-3-86395-308-9"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?univerlag-isbn-978-3-86395-308-9"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/14513"],["dc.identifier.urn","urn:nbn:de:gbv:7-isbn-978-3-86395-308-9-2"],["dc.notes.intern","TASK GROB-550"],["dc.notes.status","zu prüfen"],["dc.publisher","Universitätsverlag Göttingen"],["dc.publisher.place","Göttingen"],["dc.relation.crisseries","Göttingen Series in X-Ray Physics"],["dc.relation.ispartofseries","Göttingen Series in X-ray Physics; 19"],["dc.rights","CC BY-SA 4.0"],["dc.rights.uri","http://creativecommons.org/licenses/by-sa/4.0/deed.de"],["dc.title","X-ray waveguide optics"],["dc.title.subtitle","Beyond straight channels"],["dc.type","thesis"],["dc.type.internalPublication","unknown"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","153"],["dc.bibliographiccitation.journal","Frontiers in Neurology"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Ulm, Lena"],["dc.contributor.author","Hoffmann, Sarah"],["dc.contributor.author","Nabavi, Darius"],["dc.contributor.author","Hermans, Marcella"],["dc.contributor.author","Mackert, Bruno-Marcel"],["dc.contributor.author","Hamilton, Frank"],["dc.contributor.author","Schmehl, Ingo"],["dc.contributor.author","Jungehuelsing, Gerhard-Jan"],["dc.contributor.author","Montaner, Joan"],["dc.contributor.author","Bustamante, Alejandro"],["dc.contributor.author","Katan, Mira"],["dc.contributor.author","Hartmann, Andreas"],["dc.contributor.author","Ebmeyer, Stefan"],["dc.contributor.author","Dinter, Christiane"],["dc.contributor.author","Wiemer, Jan C."],["dc.contributor.author","Hertel, Sabine"],["dc.contributor.author","Meisel, Christian"],["dc.contributor.author","Anker, Stefan-D."],["dc.contributor.author","Meisel, Andreas"],["dc.date.accessioned","2018-11-07T10:24:50Z"],["dc.date.available","2018-11-07T10:24:50Z"],["dc.date.issued","2017"],["dc.description.abstract","Background: Pneumonia is among the most common acute complications after stroke and is associated with poor long-term outcome. Biomarkers may help identifying stroke patients at high risk for developing stroke-associated pneumonia (SAP) and to guide early treatment. AIMS: This trial investigated whether procalcitonin (PCT) ultrasensitive (PCTus)-guided antibiotic treatment of SAP can improve functional outcome after stroke. METHODS: In this international, multicenter, randomized, controlled clinical trial with blinded assessment of outcomes, patients with severe ischemic stroke in the middle cerebral artery territory were randomly assigned within 40 h after symptom onset to PCTus-based antibiotic therapy guidance in addition to stroke unit care or standard stroke unit care alone. The primary endpoint was functional outcome at 3 months, defined according to the modified Rankin Scale (mRS) and dichotomized as acceptable (<= 4) or unacceptable (>= 5). Secondary endpoints included usage of antibiotics, infection rates, days of fever, and mortality. The trial was registered with http://ClinicalTrials.gov (Identifier NCT01264549). RESULTS: In the intention-to-treat-analysis based on 227 patients (112 in PCT and 115 in control group), 197 patients completed the 3-month follow-up. Adherence to PCT guidance was 65%. PCT-guided therapy did not improve functional outcome as measured by mRS (odds ratio 0.79; 95% confidence interval 0.45-1.35, p = 0.47). Pneumonia rate and mortality were similar in both groups. Days with fever tended to be lower (p = 0.055), whereas total number of days treated with antibiotics were higher (p = 0.004) in PCT compared to control group. A post hoc analysis including all PCT values in the intention-to-treat population demonstrated a significant increase on the first day of infection in patients with pneumonia and sepsis compared to patients with urinary tract infections or without infections (p < 0.0001). CONCLUSION: PCTus-guided antibiotic therapy did not improve functional outcome at 3 months after severe ischemic stroke. PCT is a promising biomarker for early detection of pneumonia and sepsis in acute stroke patients."],["dc.identifier.doi","10.3389/fneur.2017.00153"],["dc.identifier.isi","000399981200001"],["dc.identifier.pmid","28484421"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14463"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42736"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Frontiers Media Sa"],["dc.relation.issn","1664-2295"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","The Randomized Controlled STRAWINSKI Trial: Procalcitonin-Guided Antibiotic Therapy after Stroke"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Applied Physics A"],["dc.bibliographiccitation.volume","126"],["dc.contributor.author","Hoffmann-Urlaub, Sarah"],["dc.contributor.author","Zhang, Yaodong"],["dc.contributor.author","Wang, Zhaodong"],["dc.contributor.author","Kressdorf, Birte"],["dc.contributor.author","Meyer, Tobias"],["dc.date.accessioned","2021-04-14T08:26:11Z"],["dc.date.available","2021-04-14T08:26:11Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1007/s00339-020-03699-9"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/81860"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1432-0630"],["dc.relation.issn","0947-8396"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Fabrication of tin-based halide perovskites by pulsed laser deposition"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]