Bülend Ortaç

By Bülend Ortaç, Elif Uzcengiz Şimşek and Canan Kurşungöz

In the last few decades, nanoparticles have become key components in a variety of applications in nanotechnology, nanoengineering, and nanoscience. Pulsed laser ablation in liquids (PLAL) method is frequently preferred for fast and pure nanoparticle generation. There exists a wide range of metal and semi-conductor nanoparticles that are successfully synthesized by PLAL method. In our research, nanoparticle synthesis of different materials and their applications are pursued. After nanoparticle synthesis, the application research proceeds and the scope of the research spans many subjects ranging from sensor realization to biological applications.

Part of the book: Laser Ablation

By Ahmet Hakan Yilmaz, Bülend Ortaç and Sevil Savaskan Yilmaz

A risk to the nuclear industry is radiation, specifically neutron radiation. In order to maintain a safe workspace for workers, better shielding is being developed. Current shielding methods are examined and boron is considered a potential material for shielding. All living beings and non-living things on earth are exposed to the daily radiation of natural radiation sources in the air, water, soil, and even in their bodies, as well as artificial radiation sources produced by humans. To be safeguarded from the detrimental influences of radiation, it is important to be careful about three basic issues: time, distance, and shielding. The longer the exposure time to radiation from the radioactive source or the closer one is to the radioactive source, the higher the radiation dose to be received. The radiation emitted by some radionuclides is so intense that you can be exposed to it even though you cannot see it from miles away. It can only be protected from the effects of such intense radioactive materials with strong shielding. Boron, having a large cross-section, is combined with other materials in order to obtain the desired material properties to have shielding that can be applied in different situations.

Part of the book: Boron, Boron Compounds and Boron-Based Materials and Structures

By Ahmet Hakan Yilmaz, Bülend Ortaç, Saliha Mutlu and Sevil Savaskan Yilmaz

Polyethylene (PE), ion exchangers and membranes, super absorbents, radiation shielding, and laser ablation are covered initially. In the second part, studies on polyethylene-based ion exchangers and membranes are given. Ion exchangers and membranes chemically modify copolymers to exchange ions in the electrolyte solution. The third segment covers research on polyethylene-based super absorbent copolymers and composites for water retention and heavy metal contamination removal. Super absorbent polymers are hydrophilic, water-insoluble polymers that absorb plenty of water. With their expansion capacity and user-friendliness, super absorbents are widely used in various fields such as biomedicine, drug distribution, personal care products, batteries, tissue engineering, construction, food packaging, heavy metal separation, electronics, cables, cosmetics, and agriculture. Polyethylene-based polymeric composites are used more to minimize radiation. PE’s high hydrogen concentration absorbs neutrons, making it a radiation shield. Block copolymers of polystyrene-b-poly-ethyleneglycol and boron nitride particles can make selenium dioxide a structural material and radiation barrier when paired with nanostructures. The fourth section examines the optical and conductivity properties of laser-ablated polyethylene nanocomposites with metal oxide nanoparticles. Laser ablation polishes metal, transparent materials, composites with surface and interior changes, and nanomaterials. Polymer laser ablation improves surface modification and thin layer deposition. Laser wavelength affects UHMWPE wettability.

Part of the book: Polyethylene