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164
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Citations since 2017
Publications
Publications (12)
Background:
: The aim of our study was to evaluate the effect of reduced injected tracer activities on the quantitative image metrics and the visual image quality in whole-body 18F-FDG PET/MRI with TOF capability in pediatric oncology.
Methods:
Seventy-seven PET/MRI examinations of 54 patients were analyzed (standard injected activity: 1.9 MBq/k...
Cerebrovascular dysfunction has been suggested as a physiomarker of Alzheimer's disease (AD)-associated neuronal degeneration, but the underlying mechanisms are still debated. Herein cerebral vasomotor reactivity (VMR, breath-hold index: BHI), metabolic activity (lobar SUVs, FDG PET MRI), amyloid load (Centiloid score, Flutemetamol PET MRI), hemisp...
The purpose of this study is to assess brain glucose metabolism and Amyloid‐β burden in patients with Alzheimer’s disease with 3 Tesla PET/MR imaging and to seek possible relation of imaging findings with the extent of cognitive impairment. 45 consecutive subjects with memory complaints were evaluated with a detailed neuropsychological test battery...
We have investigated the device characteristics of a Ti2CT2 (T = O or F) MXene-based field-effect transistor consisting of semiconducting Ti2CO2 seamlessly connected to metallic Ti2CF2 electrodes. Our non-equilibrium Green's function (NEGF) quantum transport calculations reveal that the smallest feature size is ≈6 nm for gate-controlled current. Ch...
We propose Mo2TiC2O2-based quantum transport device as a pressure sensor. Using non-equilibrium Green’s function technique, we have investigated the current–voltage characteristics of Mo2TiC2O2-based nanodevice under pressure. In a compressed double MXene, the electronic states originating from the two different transition metals are shifted up une...
We suggest a MXene-based magnetic tunnel junction (MTJ) design. The device characteristics of the MTJ were investigated by non-equilibrium Green's function (NEGF) formalism within the density functional theory. Inspired by the first synthesized magnetic MAX crystal of Mn2GaC, its 2D counterpart of the half-metallic Mn2CF2 MXene layer was selected a...
We have investigated the electronic structure of the Sc2C(OH)2 MXene interfacing with a polar AlN multi-layer or a hydrogenated AlN surface. Density functional theory calculations reveal that the nearly free electron (NFE) states of the MXene shift down when the MXene is in contact with a polar flat surface. The Sc2C(OH)2/AlN heterostructure shows...
We predict a graphene-like BPC2 monolayer using density functional theory (DFT) calculations. Three types of possible atom arrangements are constructed starting from BP monolayer: types I, II, and III. We find BPC2 type I to be semi-metallic while the other atom arrangements have semiconductor character. According to our calculated phonon spectrum...
The electric field- and charge transfer-induced topological properties of Sc2C(OH)2 MXene layers are reported. The system transforms from a trivial insulator to a topological insulator and to a metal. The s-pd orbitals are exchanged during the topological phase transition. The modification of the bandgap along with the transition to the topological...
The electronic structures of Si and Ge substitutionally doped Sc$_2$C(OH)$_2$ MXene monolayers are investigated in density functional theory. The doped systems exhibit band inversion, and are found to be topological invariants in $Z_2$ theory. The inclusion of spin orbit coupling results in band gap openings. Our results point out that the Si and G...
We report the modification of the band gap in Sc2CF2 MXene monolayer through the C atom substitution by Si, Ge, Sn, F, S, N, B, and B+N. Our geometry optimizations, total energy and electronic structure calculations are performed in Density Functional Theory. We find that Si, Ge, Sn, B, and B+N doped Sc2CF2 monolayers remain semiconducting with ban...
In this work Earth’s field nuclear magnetic resonance (EFNMR) technique for applications in security scanning devices has been presented. The EFNMR setup has been build based on Magritek low-frequency (0–1 MHz) KEA-2 NMR console. Excepting the NMR console, all components are home-made units, which are a first-order gradiometer RF probe, pre-polariz...
Projects
Project (1)
MXene and Double MXene structures will be investigated in Density Functional Theory (DFT) under mechanical strain, after modification by substitutional doping, atomic defects, surface termination alterations, and especially after spin current enhancing modifications. The fact that some of the topological insulators in condensed matter physics are MXenes and the prediction that the d-d bant exchange is happening in these systems make MXene related materials good candidate for applications. In this project, topological insulating properties will be enhanced in MXene and Double MXene crystals and their bant exchange mechanisms will be analyzed.
