1,918 research outputs found
Photo-patterning of highly efficient state-of-the-art phosphorescent OLEDs using orthogonal hydrofluoroethers
No full textThe authors kindly acknowledge the financial support by the Free State of Saxony, the Sächsische Aufbaubank (SAB, Project Nr. 100087862), and the European Social Fund (ESF).Photolithography offers a scalable solution for large area pixel patterning of organic light-emitting diode (OLED) displays. It has been limited due to the incompatibility of traditional processing steps with the majority of organic materials. In this work, photolithographic structuring of state-of-the-art phosphorescent red p-i-n OLEDs is demonstrated using fluorinated polymers in combination with hydrofluoroether solvents. This is the first report on photolithographically patterned OLEDs with state-of-the-art efficiency and good long-term stability.Peer reviewe
Boron, carbonate carbon and oxygen isotope data of all analyzed sections from the Marinoan glaciation
No full textUncertainty for Namibian B isotope data is d11B: ±1per mil 2 Sigma f. A, B, C are pH estimations based on different d11Bseawater assumptions: pKB of 8.579 (Dickson, 1990), a fractionation factor alpha of 1.0272 (Klochko et al., 2006) and a seawater d11B composition of A=20.5 per mil, B=21.5 per mil and C=22.5 per mil (same as Kasemann et al. (2010)) are used
In situ boron isotope analysis in marine carbonates and its application for foraminifera and palaeo-pH
No full textLate Quaternary Sr-Nd-Pb isotope composition of the siliciclastic sediment fraction of the marine sediment core PS72/287-3 from Barrow Strait, Canadian Arctic Archipelago
No full textThe Sr-Nd-Pb isotope composition of siliciclastic sediments from the marine sediment core PS72/287-3 from Barrow Strait was analyzed to identify changing sediment provenances during the last deglaciation and the Holocene. Barrow Strait was blocked by the confluent Laurentide and Innuitian ice sheets during the last glacial period and is hence very interesting to study deglaciation processes in the Canadian Arctic. Varying Sr and Nd isotope ratios during the deglacial period suggest changing sediment sources probably related to ice sheet dynamics and sediment transport processes. After the deglacial period, radiogenic isotope ratios evolved less variable, indicating just slight changes in sediment provenance related to more stable environmental conditions during the Holocene.
Sample preparation and radiogenic isotope analysis were conducted in the laboratories of the Isotope Geochemistry Group at MARUM – Center for Marine Environmental Sciences, University of Bremen, Germany. Sediment samples were leached using a NaOH-buffered solution of hydroxylamine hydrochloride and 15% acetic acid in order to separate the siliciclastic sediment fraction (adapted from Gutjahr et al. 2007, https://doi.org/10.1016/j.chemgeo.2007.03.021). Using a Thermo-Fisher Scientific TRITON Plus thermal ionization mass spectrometer (TIMS), the isotope ratios were determined after the elements had been separated by column chemistry
Boron, lithium and isotope compositions in acid-sulfate and black smoker fluids from Macauley and Brothers of SONNE cruise SO253 (South Pacific)
No full textLithium, boron and magnesium isotope compositions in high-temperature and acid-sulfate fluids from Brothers and Macauley volcano, Kermadec Arc, Western Pacific collected during SO-253 cruise. The acid-sulfate fluids exceed Mg concentrations of seawater and differ from previously known acid-sulfate fluids with seawater-like Mg concentrations. Based on our data, we explain the Mg enrichments with venting of a brine phase (Macauley volcano) and dissolution of caminite and Mg leaching from the ocean crust (Lower Cone, Brothers Volcano)
Strontium isotopes of Kumano mud volcanoes' pore waters extracted from cores taken during the SO222 expedition in 2012
No full textSr Isotopes data of Kumano mud volcanoes' (Offshore SE Japan) pore waters extracted from cores taken during the SO222 expedition in 2012.
A total of 10 acidified fluid samples were analyzed for their strontium isotopic composition. Due to low fluid volume recovery, 5 samples are mixtures of adjacent samples (mixing ratios are given in appendix). Strontium was separated on cation exchange resin using HCl as the eluent and measured on a Micromass Sector 54 multicollector thermal ionization mass spectrometer (TIMS) at SCRIPPS Institute of Oceanography (SIO), following the method described by Solidum (2002). Sr isotopic ratios were measured through dynamic multicollection and fractionation corrected to 86Sr/88Sr = 0.1194. Sr isotopic data are reported relative to NIST SRM 987 with repeated measurements yielding 87Sr/86Sr = 0.710259 ± 0.000017 (2SDmean, n = 19), which is in agreement with the published values analyzed by TIMS [0.710250±0.000034 (2SDmean, n = 1245), GeoRem data base; query July 2017; http://georem.mpch-mainz.gwdg.de.
Boron and Lithium isotopes of Kumano mud volcanoes' pore waters extracted from cores taken during the SO222 expedition in 2012
No full textB and Li Isotopes data of Kumano mud volcanoes' (Offshore SE Japan) pore waters extracted from cores taken during the SO222 expedition in 2012.
Aliquots of 14 untreated fluids were utilized for B and Li isotopic composition analysis in the isotope geochemistry laboratory at the MARUM - Center for Marine Environmental Sciences, (University of Bremen), using a ThermoScientific Neptune Plus multi collector (MC) ICP-MS, equipped with the stable introduction system (SIS) and an x-cone. The B purification technique, measurement routine and data collection method are detailed in Hüpers et al. (2016). B isotope values are given relative to the NIST SRM 951 boric acid reference material in the conventional δ11B (‰) notation. Accuracy and precision for the separation procedure and measurement was checked through NIST SRM 951 and the internal bottom seawater (BSW) standard Susu Knolls. Fully processed NIST SRM 951 yielded an average δ11B value of 0.05 ± 0.03‰ (2SD with n = 2); the long-term repeatability for δ11B of NIST SRM 951 was 0.0 ± 0.2‰ (2SD, n = 25). Fully processed BSW SuSu Knolls (39.5 ± 0.2‰ (2SD with n = 2) overlap within uncertainty with literature values on modern seawater (39.61 ± 0.2‰ (2SDmean), Foster et al., 2010).
The separation and purification of lithium was modified after Moriguti and Nakamura (1998) and is described in detail in Hansen et al. (2017), together with the measurement routine and data collection method. Li isotope ratios were measured using the standard-sample-bracketing method in 25 ng/ml Li solutions using reference material NIST RM 8545. Li isotope ratios are given in the delta δ7Li (‰) notation relative to untreated NIST RM 8545. Procedural blanks were lower than 0.01% of the Li in the processed sample aliquots and hence do not affect the sample composition. NIST RM 8545 and an internal seawater standard (bottom seawater from SuSu Knolls) were processed together with each sample series. The reference material NIST 8545, processed through the whole separation procedure, yielded a δ7Li value of 0.08 ± 0.04‰ (2SD with n = 2). Fully processed seawater shows a value of 30.8 ± 0.4‰ (2SD with n = 2), which is in agreement with literature values for IAPSO seawater (e.g. 31.2 ± 0.9‰ (2SDmean, n = 44) Pogge von Strandmann et al., 2010). The instrumental precision and internal long-term repeatability for δ7Li was -0.01 ± 0.18‰ (2SDmean, n = 82, obtained by the repeated analysis of NIST RM 8545). The uncertainty of the individual δ11B and δ7Li values is given as two standard deviation
Sr-Nd-Pb isotope composition of the siliciclastic sediment fraction of two marine sediment cores (GeoB22346-3, GeoB22357-3) from the Clyde Inlet area, northeastern Baffin Island
No full textThe Sr-Nd-Pb isotope composition of the siliciclastic sediment fraction of the two marine sediment cores GeoB22346-3 and GeoB22357-3, raised within and off the Clyde Inlet, provide insight into changes in sediment provenances during the late Pleistocene and the Holocene. Variable radiogenic isotope ratios also give evidence about a changing glacier extent on the northeastern Baffin Island and the adjacent shelf as well as changing oceanographic conditions in western Baffin Bay. Sample preparation and radiogenic isotope analysis were conducted in the laboratories of the Isotope Geochemistry Group at MARUM – Center for Marine Environmental Sciences, University of Bremen, Germany. All sediment samples were leached with a NaOH-buffered solution of hydroxylamine hydrochloride and 15% acetic acid to separate the siliciclastic sediment fraction (adapted from Gutjahr et al. 2007, , https://doi.org/10.1016/j.chemgeo.2007.03.021). Sr, Nd, and Pb were separated by column chemistry, and the isotope ratios were measured with a Thermo-Fisher Scientific TRITON Plus thermal ionization mass spectrometer (TIMS)
Major and minor elements data of Kumano mud volcanoes' pore waters extracted from cores taken during the SO222 expedition in 2012
No full textMajor and minor elements data of Kumano mud volcanoes' pore waters extracted from cores taken during the SO222 expedition in 2012.
Major and minor elements were measured via a PerkinElmer 3000 Optical Emission Plasma Spectrometer at the Scripps Institution of Oceanography with an uncertainty of better 4% 2SD from the acidified samples diluted at ratios of 100:1 (Na, Mg, Ca, S, Sr, K, Li, B) and 10:1 (Li, B, Si, Ba, Fe, Mn) (House, 2019). For selected samples with low salinity, chloride concentrations were determined by silver nitrate (AgNO3) titration with potassium chromate/di-chromate indicator (Gieskes et al., 1991), calibrated against repeated titrations of an IAPSO standard seawater. Additional subsamples were also analyzed for concentrations of sulfate (SO4) and chloride by ion chromatography (Metrohm 850 Professional IC) using aliquots of 100 µL diluted 1:100 with deionized water (18 MΩ•cm)
Pore-water and solid-phase data of a multicorer core and a gravity core at Station HE443/10, North Sea
No full textThis is a compilation of pore-water and solid-phase data for station HE443/10 in the Helgoland mud area (German Bight, North Sea). The data derive from a multicorer core (HE443/10-2) and a gravity core (HE443/10-3) which were collected during a RV HEINCKE Expedition in 2015 in order to study iron reduction processes that are linked to methane formation and oxidation. Solid-phase geochemical data includes the bulk elemental composition or the sediment as well as sequential extraction data including reactive iron oxides and sulfides. Furthermore, the stable iron isotope composition of dissolved iron and in sequentially extracted Fe pools has been determined
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