A5053597925- Catalytic Processes in Materials Science
- Advanced Chemical Physics Studies
- Copper Interconnects and Reliability
- Silicon Carbide Semiconductor Technologies
- Semiconductor materials and devices
- Copper-based nanomaterials and applications
- Graphene research and applications
- ZnO doping and properties
- Electrocatalysts for Energy Conversion
- Advanced ceramic materials synthesis
- Molecular Junctions and Nanostructures
- Heat Transfer and Optimization
- Membrane Separation Technologies
- Quantum, superfluid, helium dynamics
- Adsorption and biosorption for pollutant removal
- Catalysis and Oxidation Reactions
- Fullerene Chemistry and Applications
- Electronic and Structural Properties of Oxides
- Enhanced Oil Recovery Techniques
- Quantum Dots Synthesis And Properties
- Electrospun Nanofibers in Biomedical Applications
- Nanofluid Flow and Heat Transfer
- 2D Materials and Applications
- Topological Materials and Phenomena
- Chemical and Physical Properties of Materials
KTH Royal Institute of Technology
2016-2024
Surface coated magnetite nanoparticles (Fe3O4 NPs) with 3-mercaptopropionic acid were immobilized on amidoximated polyacrilonitrile (APAN) nanofibers using electrospinning followed by crosslinking. The prepared composite characterized Scanning Electron Microscopy (SEM), and Fourier Transform Infrared analysis (FTIR). nanofiber was evaluated for the removal of indigo carmine dye from aqueous solutions. effects contact time, initial concentration, solution pH adsorption equilibrium isotherms...
Despite the industrial importance of copper oxides, nature (100) surface Cu2O has remained poorly understood. The previously been subject to several theoretical and experimental studies, but until now not investigated by atomically resolved microscopy or high-resolution photoelectron spectroscopy. Here we determine atomic structure electronic properties Cu2O(100) a combination multiple techniques simulations within framework density functional theory (DFT). Low-energy electron diffraction...
An attractive solution to mitigate tars and also decompose lighter hydrocarbons in biomass gasification is secondary catalytic reforming, converting useful permanent gases. Albeit that it has been use for a long time fossil feedstock steam understanding of the processes still limited. Naphthalene typically present gas further understand elementary steps naphthalene transformation, we investigated temperature dependent adsorption, dehydrogenation passivation on Ni(111). TPD...
Reduction of Cu2O by hydrogen is a common preparation step for heterogeneous catalysts; however, detailed understanding the atomic reaction pathways still lacking. Here, we investigate interaction with Cu2O(100):(3,0;1,1) and Cu2O(111):(√3 × √3)R30° surfaces using scanning tunneling microscopy (STM), low-energy electron diffraction, temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS). The experimental results are compared to density functional theory simulations....
Catalyst passivation through carbon poisoning is a common and costly problem as it reduces the lifetime performance of catalyst. Adding oxygen to feed stream could reduce but may also affect activity negatively. We have studied dehydrogenation, decomposition, desorption naphthalene co-adsorbed with on Ni(111) by combining temperature-programmed (TPD), sum frequency generation spectroscopy (SFG), photoelectron (PES), density functional theory (DFT). Chemisorbed sticking shifts H2 production...
The interface of Al2O3 with 4H-SiC is investigated synchrotron-based high-resolution x-ray photoelectron spectroscopy to clarify the effect post-dielectric deposition annealing processes (rapid thermal (RTA) and furnace (FA)) involved in device fabrication. Our results show that post-deposition Al2O3/4H-SiC up 1100 °C forms a thin interfacial layer SiO2 between SiC, which possibly improves dielectric properties system by reducing oxide charges near-interface traps. Moreover, formation at...
The temperature dependent dehydrogenation of naphthalene on Ni(111) has been investigated using vibrational sum-frequency generation spectroscopy, X-ray photoelectron scanning tunneling microscopy, and density functional theory with the aim discerning reaction mechanism intermediates surface. At 110 K, multiple layers adsorb Ni(111); first layer is a flat lying chemisorbed monolayer, whereas next layer(s) consist physisorbed naphthalene. aromaticity carbon rings in reduced due to bonding...
In this paper, the interface between Al 2 O 3 and p-type 4H-SiC is evaluated using x-ray photoelectron spectroscopy (XPS) measurements. These studies are made on dielectric-semiconductor test structures with as dielectric different pre-and post-deposition treatments. XPS measurements as-deposited samples two pre-surface cleaning have shown no formation of a SiO interlayer. However, after post deposition rapid thermal annealing (RTA) at 1100 °C in N for 60s, interlayer formed. The surface...
Selenols are considered as an alternative to thiols in self-assembled monolayers, but the Se-C bond is one limiting factor for their usefulness. In this study, we address stability of by a combined experimental and theoretical investigation gas-phase-deposited hexane selenol (CH3(CH2)5SeH) on Au(111) using photoelectron spectroscopy, scanning tunneling microscopy, density functional theory (DFT). Experimentally, find that initial adsorption leaves atomic Se surface without any carbon left...