A5021598296- MXene and MAX Phase Materials
- Graphene research and applications
- Advanced materials and composites
- 2D Materials and Applications
- Microfluidic and Bio-sensing Technologies
- Microfluidic and Capillary Electrophoresis Applications
- Aluminum Alloys Composites Properties
- Electrostatics and Colloid Interactions
- Heat Transfer and Optimization
- Additive Manufacturing and 3D Printing Technologies
- Solar-Powered Water Purification Methods
- Adsorption and Cooling Systems
- Erosion and Abrasive Machining
- Metal and Thin Film Mechanics
- Conducting polymers and applications
- Catalysis and Hydrodesulfurization Studies
- Neuroscience and Neural Engineering
- Orbital Angular Momentum in Optics
- Organic Light-Emitting Diodes Research
- Agricultural and Rural Development Research
- Advanced Surface Polishing Techniques
- Molecular Junctions and Nanostructures
- Intermetallics and Advanced Alloy Properties
- Advanced Memory and Neural Computing
- Luminescence and Fluorescent Materials
TOBB University of Economics and Technology
2020-2024
Massachusetts Institute of Technology
2024
Bilkent University
2023
Abstract In this study, we present an investigation on the growth of thin Mo 2 C crystals via chemical vapor deposition using CH 4 . Optical microscopy (OM), scanning electron (SEM), atomic force microscopy(AFM), and Raman spectroscopy studies show that morphology thickness are strongly affected by impurities in system, copper substrate, graphene presence Cu surface prior to formation. Our during CVD process, orthorhombic grow along [100] direction two different regions: directly or covered...
Abstract Observation of thermally activated delayed fluorescence (TADF) in conjugated systems redefined the molecular design approach to realize highly efficient organic light emitting diodes (OLEDs) early 2010s. Enabling effective reverse intersystem crossing (RISC) by minimizing difference between singlet and triplet excited state energies (Δ E ST ) is proven be a widely applicable fruitful approach, which results remarkable external quantum efficiencies (EQE). The efficacy RISC these...
This study investigates the growth of Mo2C crystals via chemical vapor deposition (CVD) in presence a carbon (H2/CH4 gas)-containing environment. The employs both theoretical and experimental approaches to investigate vertical lateral (in-plane) crystals. A physico-mathematical consideration is applied develop an analytical forward model, which incorporates bulk diffusivities, surface solubility gradients for crystal growth. Coupled nonlinear flow equations have been advanced Mo-, Cu-, layer...
Moisture-capturing materials can enable potentially game-changing energy-water technologies such as atmospheric water production, heat storage, and passive cooling. Hydrogel composites recently emerged outstanding moisture-capturing due to their low cost, high affinity for humidity, design versatility. Despite extensive efforts experimentally explore the large space of hydrogels high-performance moisture capture, there is a critical knowledge gap on our understanding behind moisture-capture...
Chemical vapor deposition is a promising technique to produce Mo
In recent years, there has been extensive research on the memristor, a non-volatile memory device that demonstrates effective emulation of biological synapses. The implementation graphene as top electrode in memristive switching systems presents an intriguing alternative to conventional materials such Platinum. Graphene, carbon-derived material, possesses remarkable area- to-volume ratio, biocompatibility, adsorption capabilities, and high electrical conductivity thereby offers promising...
Thin transition metal carbides (TMCs) garnered significant attention in recent years due to their attractive combination of mechanical and electrical properties with chemical thermal stability. On the other hand, a complete picture how defects affect physical application potential this emerging class materials is lacking. Here, we present an atomic-resolution study on thin crystals molybdenum carbide (α-Mo2C) grown via vapor deposition (CVD) by way conductive atomic force microscopy (C-AFM)...
Abstract We investigated the chemical vapor deposition synthesis of Mo 2 C/graphene heterostructures on a partially wetted liquid copper surface, studied morphology resulting phases using electron and optical microscopy, determined rate‐limiting step for growth C graphene. The crystals varied from center to edge substrate because change in diffusion pathways owing variation thickness Cu substrate. Thin, hexagonal‐shaped were found central region, where is thickest. In addition, pressure...
The secondary operations of composite parts are performed following thermal cure processes, which generate the final dimensions with desired tolerance and quality specifications. High-strength composites, on other hand, especially aramid fiber-reinforced polymers (AFRP), not suitable for conventional machining due in part to high operational costs limited surface characterized by fuzziness delamination. Abrasive Water Jet (AWJ) has been recently shown promising results obtaining improved...
Abstract We investigated the growth mechanism of 2D Mo 2 C crystals by chemical vapor deposition (CVD) under various time and temperature conditions. The kinetics on Cu via were using a modified Johnson–Mehl–Avrami–Kolmogorov (JMAK) model. To analyze surface coverage, we employed scanning electron microscopy (SEM) applied JMAK model to determine rate activation energy. exhibited temperature-dependent behavior, described Arrhenius relationship, with an apparent energy 4 eV. Avrami plot...
<title>Abstract</title> Moisture-capturing materials can enable potentially game-changing energy-water technologies such as atmospheric water production, heat storage, and passive cooling. Hydrogel composites recently emerged outstanding moisture-capturing due to their low cost, high affinity for humidity, design versatility. Despite extensive efforts experimentally explore the large space of hydrogels high-performance moisture capture, there is a critical knowledge gap on our understanding...
Abstract This study explores the compressive mechanical properties of copper composites reinforced with graphene. Graphene was synthesized on powders via plasma-enhanced chemical vapor deposition. Multilayer graphene formation has been substantiated by Raman analysis. Graphene-coated (G/Cu) were then subjected to pressing and sintering fabricate G/Cu composites. The investigated under compression from room temperature up 400 °C in air. results demonstrated a substantial improvement compared...
Abstract CVD method is a promising technique to produce Mo 2 C crystals with large-area, controlled thickness, and reduced defect density. Typically, liquid Cu used as catalyst substrate; however, its high melting temperature (1085 C) prompted research for alternatives. In this study, we report the synthesis of large-area thin on surface at 1000 C first time. SEM, EDS, Raman Spectroscopy, XPS XRD studies show that hexagonal shaped crystals, are orthorhombic, grow along [100] direction...
In this work, the chemical vapor deposition synthesis of Mo2C/graphene heterostructure above melting temperature Cu bias (1356 K) is studied. Two sets Mo2C growth experiments at high CH4 flow rates (5 SCCM ≥ 3 SCCM) are performed, either using prior-graphene or having in situ graphitization, for three different thicknesses. Raman mappings taken from all six-test samples show graphene covers not only over pillars but also their untransformed substrate regions. The difference that pillar grows...
In the present study, capabilities of different chip materials for acoustic particle manipulation have been assessed with same microfluidic device architecture, under actuator and flow conditions. Silicon, glass, epoxy fiberglass filling (FR4), polydimethylsiloxane (PDMS) polymethyl methacrylate (PMMA) are considered as materials. The acoustophoretic chips in this study were manufactured four fabrication methods: plasma etching, chemical micromachining molding. A novel material, FR4, has...
Ultrasonic particle manipulation in microchannels is a rapidly growing research field with significant potential applications biological studies. Several factors are essential achieving effective manipulation, such as obtaining resonance conditions the actuator, chip, and/or microchannel. The choice of chip material an important design parameter since it has implications on acoustic performance, thermal stability, ease manufacturing and overall cost acoustofluidic separation unit. Even...