A5035027818- Magnetic Properties of Alloys
- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
- Rare-earth and actinide compounds
- Magnetic Properties and Applications
- Micro and Nano Robotics
- 3D Printing in Biomedical Research
- Metallic Glasses and Amorphous Alloys
- Nanoparticles: synthesis and applications
- Particle Accelerators and Free-Electron Lasers
- Additive Manufacturing and 3D Printing Technologies
- Modular Robots and Swarm Intelligence
- Financial Risk and Volatility Modeling
- Microfluidic and Bio-sensing Technologies
- Stochastic processes and financial applications
- Advanced X-ray Imaging Techniques
- Credit Risk and Financial Regulations
- Hydrogen Storage and Materials
- Magnetic and Electromagnetic Effects
- Advanced Sensor and Energy Harvesting Materials
- Gyrotron and Vacuum Electronics Research
- 3D IC and TSV technologies
- Laser-Ablation Synthesis of Nanoparticles
- Diverse Cultural and Social Studies
- Semiconductor materials and devices
Bahçeşehir University
2019-2023
Piri Reis University
2023
Institut Néel
2014-2020
Sabancı Üniversitesi
2017-2019
Altınbaş University
2017
Centre National de la Recherche Scientifique
2014-2015
Université Grenoble Alpes
2014-2015
Université Joseph Fourier
2015
University of Delaware
2010-2013
Max-Planck-Institut für Kohlenforschung
1998
3D bioprinting of hydrogels has gained great attention due to its potential manufacture intricate and customized scaffolds that provide favored conditions for cell proliferation. Nevertheless, plain natural can be easily disintegrated, their mechanical strengths are usually insufficient printing process. Hence, composite developed printing. This study aims develop a hydrogel ink extrusion-based which is entirely composed polymers, gelatin, alginate, cellulose. Physicochemical interactions...
Abstract Single crystal SmCo 5 nanoparticles with an average size of 3.5 nm are produced by cluster‐beam deposition. When deposited without matrix, the showed a super‐paramagnetic behavior blocking temperature 145 K. Dispersion in carbon matrix results increase both coercivity and temperature. Room coercivities as high 12 kOe obtained for first time mono‐layers dispersed C matrix. δM plots show that interactions samples exchange type, which can decrease overall effective anisotropy according...
Isotropic Sm–Co thin films with different Sm x Co y phases (1:7, 1:5, and 2:7) are prepared by triode sputtering of targets variable composition. A room‐temperature coercivity value 6.8 T is achieved in the film SmCo 5 phase. Transmission electron microscopy (TEM) 3D atom probe analyses that comprise this compound reveal presence Sm‐rich 4‐nm‐sized precipitates within grains along grain boundaries. Atomic‐resolution scanning transmission microscopy/high‐resolution high‐angle annular...
Abstract Recent advances in additive manufacturing made it feasible to fabricate products with desired shapes and features. Herein, a new, photocurable 3D printer ink mainly based on pentaerythritol triacrylate (PETA) is reported. To achieve rapid curing needed for printing process, high performance water‐soluble photoinitiator, lithium phenyl‐2,4,6‐trimethylbenzoylphosphinate (LAP), was emulsified PETA monomers this suspension evaluated its polymerization kinetics by exposing 395 nm...
One of the most pressing concerns to global public health is emergence drug-resistant pathogenic microorganisms due increased unconscious antibiotic usage. With rising resistance, existing antimicrobial agents lose their effectiveness over time. This indicates that newer and more effective methods should be investigated. Many studies have shown micro-/nanorobots exhibit promise in treatment microbial infections with great properties, such as intrinsic activities owing oxidative stress...
In a number of applications (automotive, wind generators), RFeB magnets are parts systems which operate at temperatures in the range 160 °C–180 °C. At these high temperatures, coercivity is preserved by substituting Dy atoms for part Nd ones. The enhanced obtained may be associated to magnetocrystalline anisotropy atoms, diffuse into R2Fe14B phase. introduction Dy, however, induces reduction remanent magnetization. Furthermore, an expensive and strategic material. this study, we explore...
Magnetic nanoparticles are key components in many fields of science and industry. Especially cancer diagnosis therapy, they involved targeted drug delivery hyperthermia applications due to their ability be controlled remotely. In this study, a PEG-coated Fe/Fe3O4 core-shell nanoparticle with an average size 20 nm 13 high room temperature coercivity (350 Oe) has been successfully synthesized. These were further tested for effect on cellular toxicity (IC50) proliferation by WST assay....
The rapid production of magnetically hard thin films over large surface areas is interest for the integration high performance materials into micro and nano systems. Compared to conventional magnetron sputtering, characterized by typical deposition rates 0.1 nm/s, much higher (5.5 nm/s) can be achieved with triode sputtering. latter was already used produce thick (5 μm) Sm-Co in plane texture coercivities up 2 T. For certain applications, there decrease film thickness while maintaining good...
Fe 16 N 2 is a compound with giant saturation magnetization approaching or exceeding that of rare‐earth‐based permanent magnets. The abundance its elements and low‐cost synthesis this has made it highly attractive to replace magnets are becoming ever more expensive utilize in applications. Herein, from flakes by surfactant‐assisted high energy ball milling demonstrated. synthesized then reduced under forming gas (Ar/H ), followed nitridation at low temperatures ammonia (NH 3 ) gas. formation...
In this work, single crystal L10 FePt nanocubes have been successfully produced by a cluster beam deposition technique without the need of post annealing. Particles deposited dc magnetron sputtering using high Ar pressures on both Si substrates and Au grids for measurement magnetic structural properties, respectively. The uniform size distribution with an average 5 nm. At 1 Torr, particles structure order parameter 0.5 RT coercivity 2 kOe switching fields observed in hysteresis loop. Further...
Interest in untethered mini and micro-robots has shown a significant increase lately, especially magneto-responsive swimmers. In this study, soft sub-millimeter sized swimmer magnetic actuation system was developed. An extrusion-based 3D printer used to form swimmers with three different types of content, Fe micro flakes nanoparticles, Nd-Fe-B flakes, were incorporated into polymeric bounder material. Using milli- micro-swimmers biological environments demands the use cyto-compatible...
Nd-Fe-B micrometer-size dots were prepared by optical lithography and sputtering. It is proposed to use such structures as model systems study intergranular phase engineering in permanent magnets. The influence of Ta, Nd, Dy, Gd coatings on the magnetization reversal dot arrays are compared, after different heat treatments. A very thin layer Dy (tNdFeB/tDy = 120) was found lead a significant increase coercive field, up 80% for total equivalent content less than 5 at. % all Nd. coercivity 20%...
The trade dominance of China in the rare earth industry, 33.8% reserves, and 70% production earths jeopardize continuity strategic applications with high-added value. Another more important problem is that mining rare-earth elements harmful to environment. A considerable amount could be recycled back industry right recycling procedure while protecting environment providing economic benefits. In this work, using powder metallurgy methods, rare-earth-based permanent magnet-containing devices...
There is an overgrowing interest in the synthesis of high performance micro magnets due to their wide application areas MEMS, microfluidics, and micro-robotics. In addition, they possess great potential become a model system for development next-generation hard magnets. this study, NdFeB/Fe hybrid micro-magnets have been synthesized by photolithography technique. NdFeB Fe nano powders form nano-thin flakes one step surfactant assisted planetary ball milling. The fabricated with different...
The spinodal decomposition has been investigated in Alnico thin films prepared by sputtering. as-made bcc were heat treated both the complex treatment of bulk magnets and a simple annealing at different temperatures range 600-900 °C. gave coercivity 2.6 kOe 600°C 6.9 800°C. maximum observed is approximately ten times larger than V value. Electron diffraction patterns can be mostly indexed to new fcc phase with a=7.79 Å. traditional similar (6.7 after full treatment) patterns. was found...
The permanent magnet industry heavily depends on Nd-Fe-B and Sm-Co alloys because of their high-energy product high room temperature coercivity. Main ingredient for having such superior magnetic properties compared to other known ferromagnetic materials is rare earth elements (Nd, Sm, Dy…). However recent worldwide reserve export limitation problem earths, shifted researchers’ focus free magnets. Among many alternatives (FePt, Zr2Co11, FeNi …), Mn-based are the most suitable due abundance...
Abstract In the present work, green synthesis is utilized in of silver nanoparticles with hazelnut (Corylus Colurna) husk which outer leaf part shell and considered bio‐waste. According to transmission electron microscopy x‐ray diffraction analysis, morphology synthesized by 0.1 g/mL extract found be spherical an average diameter 6.57 nm possesses ultra‐narrow size distribution. UV‐visible spectrometry reveals absorbance peak range between 450–475 surface plasmon resonance morphology....
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