A5086889705- Functional Brain Connectivity Studies
- EEG and Brain-Computer Interfaces
- Schizophrenia research and treatment
- Radiopharmaceutical Chemistry and Applications
- Mental Health and Psychiatry
- Psychosomatic Disorders and Their Treatments
- Neural dynamics and brain function
- X-ray Diffraction in Crystallography
- Mental Health Research Topics
- Hepatocellular Carcinoma Treatment and Prognosis
- Treatment of Major Depression
- Near-Field Optical Microscopy
- Crystallization and Solubility Studies
- Hemispheric Asymmetry in Neuroscience
- Neuroscience and Music Perception
- Medical Imaging and Pathology Studies
- Attention Deficit Hyperactivity Disorder
- Psychoanalysis and Social Critique
- Neural and Behavioral Psychology Studies
- Neurology and Historical Studies
- Planetary Science and Exploration
- Vestibular and auditory disorders
- Sleep and Wakefulness Research
- Integrated Circuits and Semiconductor Failure Analysis
- Olfactory and Sensory Function Studies
Physikalisch-Technische Bundesanstalt
2018-2020
Freie Universität Berlin
1990-2018
Charité - Universitätsmedizin Berlin
2015
University Hospital Magdeburg
2008-2014
Klinikum Magdeburg
2008-2014
Otto-von-Guericke University Magdeburg
2011
Klinik und Poliklinik für Psychiatrie und Psychotherapie
1977-2006
James S. McDonnell Foundation
2003
Museum am Rothenbaum
1994
Universität Hamburg
1994
Quasi-one-dimensional (quasi-1D) materials enjoy growing interest due to their unusual physical properties and promise for miniature electronic devices. However, the mechanical exfoliation of quasi-1D into thin flakes nanoribbons received considerably less attention from researchers than conventional layered crystals. In this study, we investigated micromechanical representative crystals, TiS3 whiskers, demonstrate that they typically split narrow with very smooth, straight edges clear...
We describe the application of scattering-type near-field optical microscopy to characterize various semiconducting materials using electron storage ring Metrology Light Source (MLS) as a broadband synchrotron radiation source.For verifying high-resolution imaging and nano-FTIR spectroscopy we performed scans across nanoscale Si-based surface structures.The obtained results demonstrate that spatial resolution below 40 nm can be achieved, despite use source with an extremely broad emission...
With the predictor problem in mind, we studied in-patients with endogenous depression whether relationships exist among EEG, therapeutic response, and severity of psychopathology.
The photon-ion merged-beams technique has been employed at the new Photon-Ion spectrometer PETRA III for measuring multiple photoionization of Xeq + (q = 1–5) ions. Total ionization cross sections have obtained on an absolute scale dominant reactions type hν → Xer − r)e− with product charge states q 2 ⩽ r 5. Prominent features are observed in photon-energy range 650–750 eV, which associated excitation or inner-shell 3d electron. Single-configuration Dirac–Fock calculations agree...
Antiferromagnets offer spintronic device characteristics unparalleled in ferromagnets owing to their lack of stray fields, THz spin dynamics, and rich materials landscape. Microscopic imaging antiferromagnetic domains is one the key prerequisites for understanding physical principles operation. However, adapting common magnetometry techniques dipolar-field-free antiferromagnets has been a major challenge. Here we demonstrate collinear antiferromagnet thermoelectric detection method by...
Nanoscale plasmonic phenomena observed in single and bilayers of molybdenum disulfide (MoS 2 ) on silicon dioxide (SiO are reported.A scattering type scanning near-field optical microscope (s-SNOM) with a broadband synchrotron radiation (SR) infrared source was used.We also present complementary mapping using tunable CO 2laser radiation.Specifically, there is correlation the topography welldefined MoS islands grown by chemical vapor deposition, as determined atomic force microscopy, (IR)...
A main challenge in understanding the structure of a cell membrane and its interactions with drugs is ability to chemically study different molecular species on nanoscale. We have achieved this for model system consisting mixed monolayers (MLs) biologically relevant phospholipid 1,2-distearoyl-sn-glycero-phosphatidylcholine antibiotic surfactin. By employing nano-infrared (IR) microscopy spectroscopy combination atomic force imaging, it was possible identify detect domain formation two...
Synchrotron radiation-based nano-FTIR spectroscopy utilizes the highly brilliant and ultra-broadband infrared (IR) radiation provided by electron storage rings for spectroscopic characterization of samples at nanoscale. In order to exploit full potential this approach we investigated influence properties source, such as bunch shape spectral bandwidth emitted radiation, on near-field spectra silicon-carbide (SiC). The adapted configuration ring optics enables a modification transverse profile...
Infrared scattering scanning near-field optical microscopy (IR s-SNOM) provides for spectroscopic imaging with nanometer spatial resolution, yet full spatio-spectral is constrained by long measurement times.Here, we demonstrate the application of compressed sensing algorithms to achieve hyperspectral FTIR-based nano-imaging at an order magnitude faster speed same spectral content compared conventional approaches.At example spectroscopy a single vibrational resonance, discuss relationship...
Semi-quantitative characterization of dopamine transporter availability from single photon emission computed tomography (SPECT) with 123I-ioflupane (FP-CIT) is based on uptake ratios relative to a reference region. The aim this study was evaluate the whole brain as region for semi-quantitative analysis FP-CIT SPECT. rationale that might reduce statistical noise associated estimation non-displaceable uptake.150 SPECTs were categorized neurodegenerative or non-neurodegenerative by an expert....
Auditory evoked potentials were recorded in 28 euthymic patients with affective psychosis who had received lithium prophylaxis for at least 5 years. Binaural clicks 4 intensities presented randomized order via headphones. Potentials from Cz, C3, and C4 referenced to linked mastoid electrodes. N1-P2 amplitudes, N1 P2 latencies, the slope of amplitude/stimulus intensity function (ASF) determined each patient. The divided into responders nonresponders on basis whether or not they been...
Selective probing of dexamethasone in excised human skin using soft X-ray spectromicroscopy provides quantitative concentration profiles as well two-dimensional drug distribution maps. Element- and site-selective excitation at the oxygen K-edge with lateral step width adjusted to 1 μm detailed information on location different layers. The key this work is probe selectively carbonyl site (C3) by O 1s → π* transition, providing also a most efficient way quantify function penetration depth...
About one third of manic patients show a decreased Electroencephalographic Vigilance Level (EVL). In two with recurrent manias the hypothesis was tested that EEG may be used to predict therapeutic response methylphenidate. Patient A (with EVL) responded rapidly methylphenidate considerable reduction symptoms and clear increase EVL, whereas patient B (normal did not any change, neither clinically nor in EEG.
Electroencephalographically oriented research on vigilance needs valid measures for assessing the level of between wakefulness and sleep. When studying different psychologically, psychopathologically, pharmacologically induced states, special attention has to be paid minor alterations which are reflected, essentially, in topographical changes alpha-activity (Stage A). Since is a dynamic process, brief fluctuations range few seconds must also recorded. In our opinion existing methods...
Abstract In the family of functional oxide materials, interface between LaAlO 3 and SrTiO (LAO/STO) is an interesting example, as both materials are large‐bandgap insulators in their bulk state but give rise to a confined 2D electron gas (2DEG) when combined through thin‐film deposition. While this 2DEG exhibits remarkable properties, its experimental investigation mostly limited destructive or non‐local (i.e. averaging over larger areas) methods until recently. Scanning near‐field optical...