Roddatis, Vladimir V.

[["dc.bibliographiccitation.firstpage","206"],["dc.bibliographiccitation.journal","Acta Materialia"],["dc.bibliographiccitation.lastpage","216"],["dc.bibliographiccitation.volume","140"],["dc.contributor.author","Liu, C."],["dc.contributor.author","Roddatis, V."],["dc.contributor.author","Kenesei, P."],["dc.contributor.author","Maaß, R."],["dc.date.accessioned","2020-12-10T14:14:52Z"],["dc.date.available","2020-12-10T14:14:52Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1016/j.actamat.2017.08.032"],["dc.identifier.issn","1359-6454"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/71527"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Shear-band thickness and shear-band cavities in a Zr-based metallic glass"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","11"],["dc.bibliographiccitation.journal","Thin Solid Films"],["dc.bibliographiccitation.lastpage","16"],["dc.bibliographiccitation.volume","577"],["dc.contributor.author","Drozdov, M. N."],["dc.contributor.author","Drozdov, Y. N."],["dc.contributor.author","Chkhalo, N. I."],["dc.contributor.author","Polkovnikov, V. N."],["dc.contributor.author","Salashchenko, N. N."],["dc.contributor.author","Yunin, P. A."],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Tolstogouzov, A."],["dc.date.accessioned","2018-11-07T10:00:47Z"],["dc.date.available","2018-11-07T10:00:47Z"],["dc.date.issued","2015"],["dc.description.abstract","Time-of-flight secondary ion mass spectrometry and high-resolution transmission electron microscopy study is reported on depth profiling of 375 nm-thick multilayer La/B4C interferential mirrors produced by magnetron sputtering for X-ray radiation at the wavelength of 6.7 nm. The introduction of ultra-thin (0.5 nm) carbon barrier layer inside each period of ca. 7.5 nm suppressed the broadening of interface regions, decreased the width of La and B profiles and as a result improved the reflectance of mirrors. Depending on the layers' sequence (La/C/B4C or La/B4C/C upward the Si substrate), two different mechanisms-chemical interaction and reaction diffusion, were employed for qualitative explanation of the obtained results. (C) 2015 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.tsf.2015.01.025"],["dc.identifier.isi","000350907200003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37882"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.relation.issn","0040-6090"],["dc.title","The role of ultra-thin carbon barrier layers for fabrication of La/B4C interferential mirrors: Study by time-of-flight secondary ion mass spectrometry and high-resolution transmission electron microscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Physical Review B"],["dc.bibliographiccitation.volume","98"],["dc.contributor.author","Meyer, Ch."],["dc.contributor.author","Roddatis, V."],["dc.contributor.author","Ksoll, P."],["dc.contributor.author","Damaschke, B."],["dc.contributor.author","Moshnyaga, V."],["dc.date.accessioned","2020-12-10T18:25:07Z"],["dc.date.available","2020-12-10T18:25:07Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1103/PhysRevB.98.134433"],["dc.identifier.eissn","2469-9969"],["dc.identifier.issn","2469-9950"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75582"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Structure, magnetism, and spin-phonon coupling in heteroepitaxial L a 2 CoMn O 6 / A l 2 O 3 ( 0001 ) films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","2201282"],["dc.bibliographiccitation.journal","Advanced Materials Interfaces"],["dc.contributor.author","Bange, Jan Philipp"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Schüler, Leonard"],["dc.contributor.author","Lyzwa, Fryderyk"],["dc.contributor.author","Keunecke, Marius"],["dc.contributor.author","Lopatin, Sergei"],["dc.contributor.author","Bruchmann‐Bamberg, Vitaly"],["dc.contributor.author","Moshnyaga, Vasily"],["dc.date.accessioned","2022-11-01T10:16:50Z"],["dc.date.available","2022-11-01T10:16:50Z"],["dc.date.issued","2022"],["dc.description.sponsorship"," Deutsche Forschungsgemeinschaft https://doi.org/10.13039/501100001659"],["dc.description.sponsorship"," Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung https://doi.org/10.13039/501100001711"],["dc.identifier.doi","10.1002/admi.202201282"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116666"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-605"],["dc.relation.issn","2196-7350"],["dc.rights.uri","http://creativecommons.org/licenses/by/4.0/"],["dc.title","Charge Transfer Control of Emergent Magnetism at SrMnO\n 3\n /LaMnO\n 3\n Interfaces"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1700109"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Advanced sustainable systems"],["dc.bibliographiccitation.volume","1"],["dc.contributor.author","Mierwaldt, Daniel"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Risch, Marcel"],["dc.contributor.author","Scholz, Julius"],["dc.contributor.author","Geppert, Janis"],["dc.contributor.author","Abrishami, Majid Ebrahimizadeh"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2020-12-10T14:06:44Z"],["dc.date.available","2020-12-10T14:06:44Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1002/adsu.201700109"],["dc.identifier.issn","2366-7486"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70006"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area C | C02 In situ hochauflösende Untersuchung des aktiven Zustands bei der photo- und elektrochemischen Wasserspaltung"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","CC BY-NC 4.0"],["dc.title","Environmental TEM Investigation of Electrochemical Stability of Perovskite and Ruddlesden-Popper Type Manganite Oxygen Evolution Catalysts"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","62"],["dc.bibliographiccitation.journal","Ultramicroscopy"],["dc.bibliographiccitation.lastpage","66"],["dc.bibliographiccitation.volume","200"],["dc.contributor.author","Meyer, Tobias"],["dc.contributor.author","Lopatin, Sergei"],["dc.contributor.author","Seibt, Michael"],["dc.contributor.author","Roddatis, Vladimir"],["dc.date.accessioned","2020-12-10T15:21:40Z"],["dc.date.available","2020-12-10T15:21:40Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1016/j.ultramic.2019.02.020"],["dc.identifier.issn","0304-3991"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16700"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73109"],["dc.language.iso","en"],["dc.notes","Artikel => Postprint / Autorenversion im Journal Ultramicroscopy (10.1016/j.ultramic.2019.02.020, Subskriptionsjournal: 24 Monate Embargo / frei zugänglich ab 27. Feb. 2021 über GoeScholar mit einer CC-BY-NC-ND license )"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["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.orgunit","Fakultät für Physik"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","A posteriori synchronization of scanning transmission electron microscopy signals with kilopixel per second acquisition rates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4479"],["dc.bibliographiccitation.issue","22"],["dc.bibliographiccitation.journal","ChemSusChem"],["dc.bibliographiccitation.lastpage","4490"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Köhler, Lennart"],["dc.contributor.author","Abrishami, Majid Ebrahimizadeh"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Geppert, Janis"],["dc.contributor.author","Risch, Marcel"],["dc.date.accessioned","2018-10-17T06:32:18Z"],["dc.date.available","2018-10-17T06:32:18Z"],["dc.date.issued","2017"],["dc.description.abstract","Targeted improvement of the low efficiency of water oxidation during the oxygen evolution reaction (OER) is severely hindered by insufficient knowledge of the electrocatalytic mechanism on heterogeneous surfaces. We chose LiMn2 O4 as a model system for mechanistic investigations as it shares the cubane structure with the active site of photosystem II and the valence of Mn3.5+ with the dark-stable S1 state in the mechanism of natural photosynthesis. The investigated LiMn2 O4 nanoparticles are electrochemically stable in NaOH electrolytes and show respectable activity in any of the main metrics. At low overpotential, the key mechanistic parameters of Tafel slope, Nernst slope, and reaction order have constant values on the RHE scale of 62(1) mV dec-1 , 1(1) mV pH-1 , -0.04(2), respectively. These values are interpreted in the context of the well-studied mechanism of natural photosynthesis. The uncovered difference in the reaction sequence is important for the design of efficient bio-inspired electrocatalysts."],["dc.identifier.doi","10.1002/cssc.201701582"],["dc.identifier.pmid","28921902"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14992"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16065"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area C | C05 Kontrolle Elektronen-getriebener Chemie durch Interkalation"],["dc.relation","SFB 1073 | Topical Area Z | Z02 Hochauflösende Charakterisierung von Grenzflächen"],["dc.relation.eissn","1864-564X"],["dc.relation.orgunit","Fakultät für Physik"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","CC BY-NC 4.0"],["dc.rights.uri","http://creativecommons.org/licenses/by-nc/4.0"],["dc.title","Mechanistic Parameters of Electrocatalytic Water Oxidation on LiMn2 O4 in Comparison to Natural Photosynthesis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Physical review materials"],["dc.bibliographiccitation.volume","4"],["dc.contributor.author","Rieger, F."],["dc.contributor.author","Roddatis, V."],["dc.contributor.author","Kaiser, K."],["dc.contributor.author","Bendt, G."],["dc.contributor.author","Schulz, S."],["dc.contributor.author","Jooss, C."],["dc.date.accessioned","2020-12-10T18:25:53Z"],["dc.date.available","2020-12-10T18:25:53Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1103/PhysRevMaterials.4.025402"],["dc.identifier.eissn","2475-9953"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75866"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Transition into a phonon glass in crystalline thermoelectric ( S b 1 − x B i x ) 2 T e 3 films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","63"],["dc.bibliographiccitation.journal","Solar Energy Materials and Solar Cells"],["dc.bibliographiccitation.lastpage","71"],["dc.bibliographiccitation.volume","146"],["dc.contributor.author","Kumar, D. Praveen"],["dc.contributor.author","Reddy, N. Lakshmana"],["dc.contributor.author","Srinivas, B."],["dc.contributor.author","Durgakumari, V."],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Bondarchuk, O."],["dc.contributor.author","Karthik, M."],["dc.contributor.author","Ikuma, Y."],["dc.contributor.author","Shankar, M. V."],["dc.date.accessioned","2018-11-07T10:17:59Z"],["dc.date.available","2018-11-07T10:17:59Z"],["dc.date.issued","2016"],["dc.description.abstract","The nanostructured TiO2 materials impregnated with Cu were prepared via a simple and eco-friendly preparation route. The materials are comprised of nano -tubes, -rods and -particles whose surfaces are modified by a fine dispersion of CuxO clusters (Cu degrees and Cu2O) as evidenced by TEM and XPS analysis. Structural and optical characterization ascertained the biphasic (anatase-rutile) crystal structure of TiO2 nano-objects. The presence of CuxO at the surface extends the absorption from the UV to the visible light range. In contrast to the pristine and calcined TiO2 nanotubes (TNT), the CuxO/TiO2 nanostructures (Cu1.5TNT) exhibit a prolonged life-time of photogenerated charge carriers and decreased surface area as confirmed by the photoluminescence spectra and surface area analysis, respectively. The prepared photocatalysts were tested for hydrogen (H-2) production activity using water, mono and di-hydroxylic alcohols solutions under solar light irradiation. Surprisingly, Cu-modified TiO2 nanostructures (Cu1.5TNT) have shown an unusually high rate of H-2 production of about 114.9 +/- 2 mmol h(-1) g(cat)(-1) under a set of optimized experimental conditions. Among all of the studied photocatalysts, the Cu1.5TNT catalyst exhibits enhancements of 33 and 18 fold in the H-2 production rate as compared to the commercial TiO2 nanoparticles (TNP) and calcined TNT, respectively. We report here on the highest known rate of H-2 production using the nanostructured Cu-doped TiO2 photocatalyst (Cu1.5TNT) under solar light irradiation. This unprecedented H-2 production is attributed to synergistic effects of nanocrystalline structures, morphology and copper oxide species (Cu degrees and Cu2O) present in the photocatalyst. (C) 2015 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.solmat.2015.11.030"],["dc.identifier.isi","000368745600009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41338"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1879-3398"],["dc.relation.issn","0927-0248"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Stable and active CuxO/TiO2 nanostructured catalyst for proficient hydrogen production under solar light irradiation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1492"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Nanoscale"],["dc.bibliographiccitation.lastpage","1504"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Quintanilla, Marta"],["dc.contributor.author","Hemmer, Eva"],["dc.contributor.author","Marques-Hueso, Jose"],["dc.contributor.author","Rohani, Shadi"],["dc.contributor.author","Lucchini, Giacomo"],["dc.contributor.author","Wang, Miao"],["dc.contributor.author","Zamani, Reza R."],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Speghini, Adolfo"],["dc.contributor.author","Richards, Bryce S."],["dc.contributor.author","Vetrone, Fiorenzo"],["dc.date.accessioned","2022-02-01T10:31:13Z"],["dc.date.available","2022-02-01T10:31:13Z"],["dc.date.issued","2022"],["dc.description.abstract","The photoluminescence quantum yield (PLQY) of NaGdF 4 :Er 3+ /Yb 3+  upconverting nanoparticles (UCNPs) as a function of size and shape is studied. Sub-20 nm α-phase UCNPs showed a higher PLQY compared to similar size β-phase UCNPs."],["dc.description.abstract","Upconverting nanoparticles (UCNPs) are well-known for their capacity to convert near-infrared light into UV/visible light, benefitting various applications where light triggering is required. At the nanoscale, loss of luminescence intensity is observed and thus, a decrease in photoluminescence quantum yield (PLQY), usually ascribed to surface quenching. We evaluate this by measuring the PLQY of NaGdF 4 :Er 3+ ,Yb 3+ UCNPs as a function of size ( ca. 15 to 100 nm) and shape (spheres, cubes, hexagons). Our results show that the PLQY of α-phase NaGdF 4 Er 3+ ,Yb 3+ surpasses that of β-NaGdF 4 for sizes below 20 nm, an observation related to distortion of the crystal lattice when the UCNPs become smaller. The present study also underlines that particle shape must not be neglected as a relevant parameter for PLQY. In fact, based on a mathematical nucleus/hull volumetric model, shape was found to be particularly relevant in the 20 to 60 nm size range of the investigated UCNPs."],["dc.description.abstract","The photoluminescence quantum yield (PLQY) of NaGdF 4 :Er 3+ /Yb 3+  upconverting nanoparticles (UCNPs) as a function of size and shape is studied. Sub-20 nm α-phase UCNPs showed a higher PLQY compared to similar size β-phase UCNPs."],["dc.description.abstract","Upconverting nanoparticles (UCNPs) are well-known for their capacity to convert near-infrared light into UV/visible light, benefitting various applications where light triggering is required. At the nanoscale, loss of luminescence intensity is observed and thus, a decrease in photoluminescence quantum yield (PLQY), usually ascribed to surface quenching. We evaluate this by measuring the PLQY of NaGdF 4 :Er 3+ ,Yb 3+ UCNPs as a function of size ( ca. 15 to 100 nm) and shape (spheres, cubes, hexagons). Our results show that the PLQY of α-phase NaGdF 4 Er 3+ ,Yb 3+ surpasses that of β-NaGdF 4 for sizes below 20 nm, an observation related to distortion of the crystal lattice when the UCNPs become smaller. The present study also underlines that particle shape must not be neglected as a relevant parameter for PLQY. In fact, based on a mathematical nucleus/hull volumetric model, shape was found to be particularly relevant in the 20 to 60 nm size range of the investigated UCNPs."],["dc.identifier.doi","10.1039/D1NR06319G"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/98804"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-517"],["dc.relation.eissn","2040-3372"],["dc.relation.issn","2040-3364"],["dc.rights.uri","http://rsc.li/journals-terms-of-use"],["dc.title","Cubic versus hexagonal – phase, size and morphology effects on the photoluminescence quantum yield of NaGdF 4 :Er 3+ /Yb 3+ upconverting nanoparticles"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]