A5058407349- Geology and Paleoclimatology Research
- Geological formations and processes
- Advanced ceramic materials synthesis
- Archaeology and ancient environmental studies
- Isotope Analysis in Ecology
- Electrocatalysts for Energy Conversion
- Pleistocene-Era Hominins and Archaeology
- Electronic and Structural Properties of Oxides
- Marine and environmental studies
- Gas Sensing Nanomaterials and Sensors
- Hydrocarbon exploration and reservoir analysis
- Copper-based nanomaterials and applications
- Geological and Geochemical Analysis
- Diamond and Carbon-based Materials Research
- High-pressure geophysics and materials
- ZnO doping and properties
- Geological Studies and Exploration
- Semiconductor materials and devices
- Metal and Thin Film Mechanics
- Boron and Carbon Nanomaterials Research
- Advanced materials and composites
- Ferroelectric and Piezoelectric Materials
- Tree-ring climate responses
- Methane Hydrates and Related Phenomena
- MXene and MAX Phase Materials
Technical University of Darmstadt
2014-2024
Kiel University
2013-2024
GFZ Helmholtz Centre for Geosciences
2009-2024
Institute of Geography and Spatial Organization, Polish Academy of Sciences
2023-2024
Universität Innsbruck
2009-2023
Oeschger Centre for Climate Change Research
2023
University of Bern
2023
Université du Québec à Rimouski
2023
Deutsches Archäologisches Institut, Zentrale
2022-2023
Deutsches Archäologisches Institut, Eurasien-Abteilung
2022-2023
The novel material class of high entropy oxides with their unique and unexpected physicochemical properties is a candidate for energy applications. Herein, it reported the first time about physico- (photo-) electrochemical ordered mesoporous (CoNiCuZnMg)Fe2 O4 thin films synthesized by soft-templating dip-coating approach. A-site ferrites (HEF) are composed periodically mesopores building highly accessible inorganic nanoarchitecture large specific surface areas. spinel HEF found to be...
In general, a moderate drying trend is observed in mid-latitude arid Central Asia since the Mid-Holocene, attributed to progressively weakening influence of Westerlies on regional climate. However, as spatio-temporal pattern this development and underlying climatic mechanisms are yet not fully understood, new high-resolution paleoclimate records from region needed. Within study, sediment core Lake Son Kol (Central Kyrgyzstan) was investigated using sedimentological, (bio)geochemical,...
In this study, the high-entropy spinel oxide (Cr0.2Mn0.2 Co0.2Fe0.2Co0.2Ni0.2)3O4 was prepared for first time as a mesoporous thin film with controlled thickness readily available on conductive substrates via dip-coating technique. The (HEO) electrodes were fabricated through soft-templating followed by rapid heating step to 600 °C achieve mesoporosity. Dense and films systematically investigated regarding their physicochemical (photo-) electrochemical properties. HEO structurally...
Investigating past interglacial climatic and environmental changes can enhance our understanding of the natural rates ranges climate variability under boundary conditions. However, comparing palaeoclimate records from different regions archives is often complicated by differing uncertain chronologies. For instance, duration Last Interglacial in Europe still controversial as southern European suggest a ~16 500–18 000 years, while length only ~11 years northern‐central was previously inferred...
Abstract Investigation of the sedimentary record pre‐Alpine Lake Mondsee (Upper Austria) focused on environmental reaction to rapid Lateglacial climatic changes. Results this study reveal complex proxy responses that are variable in time and influenced by long‐term evolution lake its catchment. A new field sampling approach facilitated continuous precisely controlled parallel at decadal sub‐annual resolution for µ‐XRF element scanning, carbon geochemistry, stable isotope measurements...
We investigated the sedimentary record of Lake Hancza (northeastern Poland) using a multi-proxy approach, focusing on early to mid-Holocene climatic and environmental changes. AMS 14C dating terrestrial macrofossils sedimentation rate estimates from occasional varve thickness measurements were used establish chronology. The onset Holocene at c. 11 600 cal. BP is marked by decline Lateglacial shrub vegetation shift clastic-detrital deposition an autochthonous dominated biochemical calcite...
This study presents a record of Holocene surface runoff events and several large earthquakes, preserved in the sediments pre-Alpine Lake Iseo, northern Italy. A combination high-resolution seismic surveying, detailed sediment microfacies analysis, non-destructive core-scanning techniques AMS 14 C dating terrestrial macrofossils was used to detect date these events. Based on this approach, our data shed light past activity vicinity Iseo influence climate variability human impact allochthonous...
Mixed bonds in SiOCs lead to a more disordered/defect-free carbon phase with high capacity for reversible storage of Li ions.
Research Article| November 01, 2012 A 1600 yr seasonally resolved record of decadal-scale flood variability from the Austrian Pre-Alps Tina Swierczynski; Swierczynski * 1GFZ German Centre for Geosciences, Section 5.2–Climate Dynamics and Landscape Evolution, Telegrafenberg, D-14473 Potsdam, Germany *E-mail: swier@gfz-potsdam.de. Search other works by this author on: GSW Google Scholar Achim Brauer; Brauer Stefan Lauterbach; Lauterbach Celia Martín-Puertas; Martín-Puertas Peter Dulski; Dulski...
Abstract Millennial‐scale reductions in monsoon precipitation, so‐called Weak Monsoon Intervals (WMIs), have been identified numerous paleoclimate records across the Afro‐Asian domain throughout last glacial‐interglacial cycle. These are considered regional response to cooling during Heinrich events North Atlantic realm and several mechanisms suggested explain this hemisphere‐scale climatic teleconnection. In particular, Indian Ocean sea surface temperature (SST) proposed as linking element...
SignificanceUnderstanding the drivers of South Asian monsoon intensity is pivotal for improving climate forecasting under global warming scenarios. Solar insolation assumed to be dominant driver variability in warm regimes, but this has not been verified by proxy data. We report a rainfall record spanning last ∼130 kyr Ganges-Brahmaputra-Meghna river catchment. Our multiproxy data reveal that was weaker during Last Interglacial (130 115 ka)-despite higher insolation-than Holocene (11.6 ka...
Mesoporous Co 3 O 4 thin films, prepared by dip-coating and using Pluronic ® F-127 as template, demonstrated improved OER activity compared to dense providing high surface areas with increased concentration of catalytically active sites.
Nanocrystalline high-entropy CoNiFeCrMnO x thin films were prepared by dip-coating and annealing at 400 °C, showing stable oxygen evolution with overpotentials of 258 mV vs. RHE 10 mA cm −2 over hours in alkaline media.
Extreme chemistry: The carbon nitride imide C2N2(NH) is synthesized from the single-source precursor 1-cyanoguanidine under high-pressure and high-temperature conditions in a laser-heated diamond-anvil cell. Characterization of single crystals recovered at ambient reveals that new compound adopts defect wurtzite structure (see picture).
The microstructure of two pressureless‐sintered ultra‐high‐temperature ceramics, namely ZrC+20 vol% MoSi 2 and HfC+20 , was characterized by scanning transmission electron microscopy. With regard to the ZrC–MoSi system, Zr x Si y compounds SiC were detected. In HfC–MoSi a mixed phase detected at triple points identified as (Mo,Hf) 5 3 . For both systems investigated, high wettability silicide‐based phases on matrix grains suggests that sintering is assisted liquid phase. This contribution...
A facile electroless plating procedure for the controlled synthesis of nanoscale silver thin films and derived structures such as nanotubes was developed products were characterized by SEM, TEM EDS. The highly stable baths consist AgNO(3) metal source, a suitable ligand tartrate an environmentally benign reducing agent. Next to variation coordinative environment oxidizing component, influence pH value evaluated. These two governing factors strongly affect rate morphology developing...
The way is open for the physical and chemical characterization single-crystal growth of orthorhombic o′-In2O3 polymorph. Orthorhombic In2O3 synthesized from rhombohedral corundum-type rh-In2O3 under moderately high-pressure high-temperature conditions (8–9 GPa, 600–1100 °C) followed by recovery to ambient pressure temperature. crystal-structure data at confirm unambiguously Rh2O3(II)-type structure.
Reconstructions of early human occupation high-altitude sites in Central Asia and possible migration routes during the Holocene are limited due to restricted archaeological sample material. Consequently, there is a growing interest alternative approaches investigate past anthropogenic activity this area. In study, fecal biomarkers preserved lake sediments from Lake Chatyr Kol (Tian Shan, Kyrgyzstan) were analyzed reconstruct local presence humans pastoral animals low-human-impact area past....