A5030565181- 2D Materials and Applications
- MXene and MAX Phase Materials
- Perovskite Materials and Applications
- Graphene research and applications
- Infrastructure Maintenance and Monitoring
- Chalcogenide Semiconductor Thin Films
- Advanced materials and composites
- Structural Health Monitoring Techniques
- Advanced Memory and Neural Computing
- Advanced ceramic materials synthesis
- Aluminum Alloys Composites Properties
- Structural Engineering and Vibration Analysis
- Innovative concrete reinforcement materials
- Rock Mechanics and Modeling
- Metallurgy and Material Forming
- Structural Behavior of Reinforced Concrete
- Gear and Bearing Dynamics Analysis
- Ultrasonics and Acoustic Wave Propagation
- Covalent Organic Framework Applications
- Nanowire Synthesis and Applications
- 3D IC and TSV technologies
- Metal and Thin Film Mechanics
- Semiconductor materials and devices
- Electrocatalysts for Energy Conversion
- Microstructure and Mechanical Properties of Steels
RWTH Aachen University
2022-2025
FEG Textiltechnik (Germany)
2023
Fondazione Bruno Kessler
2020-2021
Institute of Materials for Electronics and Magnetism
2020-2021
University of Parma
2018-2020
Ege University
2014-2016
University of Zanjan
2013
Abstract The ongoing miniaturization of electronic devices has boosted the development new post-silicon two-dimensional (2D) semiconductors, such as transition metal dichalcogenides, one most prominent materials being molybdenum disulfide (MoS 2 ). A major obstacle for industrial production MoS -based lies in growth techniques. These must ensure reliable fabrication with tailored 2D properties to allow typical direct bandgap 1.9 eV, while maintaining large-area and device compatibility. In...
A reliable and scalable transfer of 2D-TMDCs (two-dimensional transition metal dichalcogenides) from the growth substrate to a target with high reproducibility yield is crucial step for device integration. In this work, we introduced dry-transfer approach grown by MOCVD (metal–organic chemical vapor deposition) on sapphire. Transfer silicon/silicon dioxide (Si/SiO2) performed using PMMA (poly(methyl methacrylate)) TRT (thermal release tape) as sacrificial layer carrier, respectively. Our...
This paper will investigate wavelet packet transform of acoustic emission (AE) signal processing in order to identify failure mechanisms unidirectional carbon/epoxy composites. For this purpose, composites were tested tensile test by two different loading conditions. the first specimen, load was applied through fiber direction (T0) and for second perpendicular (T90), AE signals collected during experimental procedure signal’s waveforms decomposed into various levels that each includes...
The nucleation of tungsten disulfide WS2 crystallites and coalescence behaviour monolayer films grown on C-plane sapphire have been studied in a commercial AIXTRON close coupled showerhead metalorganic chemical vapor deposition (MOCVD) reactor using hexacarbonyl di-tert-butyl sulfide as precursors. influence substrates offcut (both orientation angle), well the substrate annealing conditions growth temperature, size domains has investigated. A higher temperature combined with increased...
Abstract Metal–organic chemical vapour deposition (MOCVD) has become one of the most promising techniques for large-scale fabrication 2D transition metal dichalcogenide (TMDC) materials. Despite efforts devoted to development MOCVD TMDC monolayers, whole picture growth process not been fully unveiled yet. In this work, we employ a commercial AIXTRON CCS tool MoS 2 on sapphire using standard precursors and H as carrier gas. Adsorption diffusion Mo adatoms substrate are found be decisive...
Self-powered photodetectors operate without external power sources and are therefore of interest for wireless light sensing applications in different environments. To ensure high values both linear dynamic range bandwidth, optically generated charge carriers must be separated extracted efficiently even the absence an bias, carrier transport effects that limit performance data bulk semiconductor devices minimized. Here, we present a self-powered photodetector device visible spectral range,...
Metal–organic chemical vapor deposition (MOCVD) is widely employed for the wafer-scale synthesis of transition metal dichalcogenide (TMDC) monolayers (MLs). Despite large efforts devoted to understanding intricate nucleation and lateral growth mechanisms TMDCs, little attention has been paid migration adatoms on top an ML its influence parasitic/premature bilayer (BL) nucleation. In this work, using a commercial multi-wafer MOCVD platform, novel two-stage migration-enhanced process...
Structural defects in transition metal dichalcogenide (TMDC) monolayers (ML) play a significant role determining their (opto)electronic properties, triggering numerous efforts to control defect densities during material growth or by post-growth treatments. Various types of TMDC have been successfully deposited MOCVD (metal-organic chemical vapor deposition), which is wafer-scale deposition technique with excellent uniformity and controllability. However, so far there are no findings on the...
Two-dimensional (2D) MoS2 is an emerging alternative to traditional semiconductors, overcoming scaling limits in device fabrication. Ongoing efforts realize the full potential of 2D CMOS back-end-of-line integration encounters notable challenges due synthesis such materials requiring high temperature growth substrates and a transfer step. Consequently, lattice preservation atomic layers during from substrate target crucial for fabrication system integration. This work, investigates impact...
Metal–organic chemical vapor deposition (MOCVD) is a key method for scalable synthesis of two-dimensional transition metal dichalcogenide (2D-TMDC) layers. However, it faces several challenges, such as the unintentional co-deposition carbon impurities resulting from pyrolysis metal–organic precursors. This study investigates features and its impact on photoluminescence property air stability 2D-MoS2. Using X-ray photoemission spectroscopy (XPS), was found that show characteristics similar to...
In this study, a comprehensive investigation of the role sulfur vacancies on electronic structure and surface reactivity molybdenum disulfide is presented. A 2H-MoS2 single crystal was annealed at two different temperatures, namely, 300 500 °C in vacuum, order to generate controlled manner. The detailed characterization by means X-ray ultraviolet photoelectron spectroscopy clearly evidences formation strong dipole as well band bending due excess negative charge Mo centers, consequence...
The lack of scalable synthesis transition metal dichalcogenides, such as molybdenum disulfide (MoS2), has proved to be a significant bottleneck in realization fundamental devices and hindered the commercialization these materials technologically relevant applications. In this study, cost-efficient versatile thin-film fabrication technique based on ionized jet deposition (IJD), i.e., potentially providing high processing efficiency scalability, is used grow MoS2 thin films silicon substrates....
Extensive research into two-dimensional transition metal dichalcogenides (2D-TMDCs) over the past decade has paved way for development of (opto)electronic devices with enhanced performance and novel capabilities. To realize based on 2D-TMDC layers, compatible optimized technologies such as layer transfer photolithography are required. Challenges arise due to ultrathin, surface-only nature 2D layers weak van der Waals adhesion their substrate. This might potentially compromise integrity...
Abstract In this study, the influences of reinforcement volume fraction and ratio particle size to matrix on wear behaviour Al/SiC metal composites were investigated by use a model function obtained from an artificial neural network. Hardness ball-on-disc tests applied manufactured via powder metallurgy method. The results indicate that as increase, loss decreases except in two cases; first case (vol.% ≤ 7.5), rises, increases then decreases. second case, decreasing trend at high values (≥...
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A reliable and scalable transfer of 2D-TMDCs (two-dimensional transition metal dichalcogenides) from the growth substrate to a target with high reproducibility yield is crucial step for device integration. In this work, we have introduced dry-transfer approach grown by MOCVD (metal-organic chemical vapor deposition) on sapphire. Transfer silicon/silicon dioxide (Si/SiO$_2$) performed using PMMA (poly(methyl methacrylate)) TRT (thermal release tape) as sacrificial layer carrier, respectively....
Lubrication is one of the essential parts various processes and instruments namely rotational devices such as bearings. Artificial intelligence (AI) systems artificial neural networks (ANNs) have been applied to solve, predict optimize in engineering problems last decade. Present study assesses capability estimating viscosity lubricants used lubrication journal Using instead running tests lubricant reduces costs eliminates necessity using by researcher. The data SAE 10, 20, 30, 40 were train...
This paper presents an investigation of the capabilities artificial neural networks (ANN) in predicting some mechanical properties Ferrite-Martensite dual-phase steels applicable for different industries like auto-making. Using ANNs instead destructive and non-destructive tests to determine material properties, reduces costs need special testing facilities. Networks were trained with use a back propagation (BP) error algorithm. In order provide data training ANNs, inter-critical annealing...