Fuat Erden

Sivas University of Science and Technology · Aeronautical Engineering

In the present work, cholesterol (Chol)-substituted zinc phthalocyanine (Chol-ZnPc) and its composite with graphene oxide (GO) were prepared for photodynamic therapy (PDT) applications. Briefly, Chol-substituted phthalonitrile (Chol-phthalonitrile) was synthesized first through the substitution of Chol to the phthalonitrile group over the oxygen br...

In this study, [2,9,16,23-tetra{(4,5-Diphenyl-1H-imidazole)-2-yl-thio}phthalocyaninato-copper(II)] 1 obtained as a result of tetramerization reaction of 4,5-diphenyl-1H-imidazole substituted phthalonitrile derivative in the presence of copper(II) chloride. [2,9,16,23-tetra{(4,5-Diphenyl-1-methyl-1H-imidazole)-2-yl-thio}phthalocyaninato-copper(II)]...

In the present work, a folding wing system (FWS) was developed for guided ammunitions, so that the swept-back angle could be adjusted during both gliding and diving phases. Unlike previous designs, the FWS does not have any fixing mechanisms or brake elements, and it provides folding functionality to reduce the drag force during the terminal phase....

Abstract Sulfurization has a critical role in preparation of CZTS films since the main drawback of CZTS is due to the presence of S‐based impurities. In general, sulfurization could be performed during or following annealing, or the entire CZTS structure could be prepared through sol‐gel. However, toxic gases are used for the former, and the latter...

Poor water solubility is the main drawback of phthalocyanine (Pc)-based second generation photosensitizing agents in photodynamic therapy (PDT). To resolve this, we proposed preparation of quaternized serotonin substituted zinc phthalocyanine (q-Ser-ZnPc) since the positive charge on quaternary amines could improve water-solubility and might limit...

Comprehensive surface free energy (SFE) analysis and surface-electrical property relationships of de-doped and camphorsulfonic acid (CSA) doped polyaniline (PANI) films were not handled systematically previously. In this work, changes of surface and electrical properties of CSA doped PANI films were evaluated simultaneously with respect to dopant c...

Guillaume stunned the scientific community in 1897 by reporting a very low CTE in Fe36Ni alloy, which also named invar 36. The anomalous CTE feature makes invar 36 an indispensable material in a wide range of critical applications, including high precision optics, laser components, composite molds in aeronautical industry, and various instruments i...

This paper focuses on incorporation of graphene oxide (GO) to metal‐free phthalocyanine (MPc) through only hydrogen bonding and π‐π stacking. Briefly, Pc‐GO composites at various concentrations were prepared by self‐assembly method. The processing time was kept below 10 minutes to avoid covalent attachment and we aimed at answering the research que...

Most thermoelectric (TE) materials are brittle and exhibit high coefficient of thermal expansion (CTE), both of which are undesirable considering their service conditions. In this context, invar 36 is known to be a ductile material with a very low CTE feature. However, its TE performance is yet to be reported. Accordingly, the present work involves...

CZTS has attracted attention in the field of solar cell technology due to its non-toxicity, high efficiency and low cost nowadays. Determination and optimization of parameters affecting Cu, Zn and Sn layers during electroplating in p-type CZTS thin film synthesis is the aim of this study. For this purpose, effect of coating solution ingredients on...

This paper focuses on the determination of economically most feasible conditions to obtain polystyrene with various target molecular weights through ultrasound-assisted emulsion polymerization. Briefly, batch polymerizations of styrene have been performed by ultrasound-assisted emulsion polymerization process using different reaction feed compositi...

The aim of this study is to investigate the effect of CZT (Cu, Zn, Sn) coating sequence on the hydrophilic property of the surface, and therefore, to what extent the changing surface wettability changes the sulfur content in the CZTS film. For this, Cu, Zn, Sn and Cu+Sn were coated on glass substrates by electroplating method in different coating c...

ITO, ZTO, AZO and Ag are commonly used in transparent conducting oxide (TCO)/metal/TCO electrodes to form multilayered thin films on a suitable substrate. A detailed surface free energy (SFE) knowledge of these films is critical to design desirable TCO-based sandwich structures. In this study, TCO/Ag/TCO multilayer thin films were coated onto glass...

A new approach is brought to diamond recovery from waste cutting segments. Unlike the commonly used hydrometallurgical processes, this approach offers the simultaneous recovery of copper with diamond. Besides, instead of strong acids, this work involves use of a dilute acid solution, reducing the evolution of toxic vapors. Copper base segments of w...

Porous forms of Cu, Al and Cu/Al were prepared by powder metallurgy and the effect of process parameters on the microhardness, porosity and the cooling rate was examined. We report that although columnar powders are compacted more tightly under high compaction pressures, they also tend to form a connected pore network if a definite percentage poros...

A detailed surface free energy (SFE) knowledge of transparent conducting oxide (TCO)/metal/TCO electrodes is necessary for their applications related to surface wettability. However, SFE analysis of these surfaces has not been performed systematically previously. In this study, ITO and ITO/Au/ITO multilayer thin films were coated onto O2 plasma tre...

ITO/Au/ITO multilayer thin films were deposited onto polycarbonate substrate via magnetron sputtering technique without intentional heating. The deposition times of both ITO and Au layers were studied to optimize the overall transparency and conductivity. As-prepared thin films were characterized using X-ray diffraction analysis, secondary ion mass...

We report the unique optical and protonation characteristics of azulene compounds with different molecular configurations, and demonstrate their potential application as acid sensor materials. The unique characteristic of azulene compound is its large dipole moment, and azulene derivatives with conjugation either along or orthogonally to the dipole...

In the present work, we report the fabrication of high-performance thermoelectric materials using low-cost TiO2/CNT/PANI ternary composites. We showed that conductivity of ~2730 S/cm can be achieved for the binary CNT (70%)/PANI (30%) composite, which is the highest recorded value for the reported CNT/PANI composites. We further demonstrated that t...

Size control has been successfully achieved in inorganic materials, but it still remains a challenge in organic polymers due to their polydispersity. We here report a facial approach to tailor the diameter of polyaniline (PANI) nanofibers in a range of 200–30 nm via temperature-controlled polymerization from room temperature to −192 °C. It is shown...

Lightweight flexible carbon nanotube (CNT)/polyaniline (PANI) free standing films having highest reported specific shielding effectiveness (SSE) of 7.5x104 dB cm2 g–1 were developed using amine-functionalized CNT, which could be attributed...

Bu buluş, erimiş tuz elektrolizi ve elektrodeoksidasyon tekniklerini birleştirerek, intermetalik (metaller arası) bileşik ve/veya alaşım oluşturmayla ilgilidir. Daha özelde; intermetalik ve/veya alaşımın en az bir bileşeni, oksidinden veya başka bir bileşiğinden, oksijen veya başka bir metalik olmayan safsızlığın atılmasıyla elde edilmelidir. Benze...

Mg2Ni is a well-known hydrogen storage alloy. Most of the preparative methods for this alloy require high temperature processing of pure magnesium and nickel. The proposed method, studied in this work, involves the production of Mg2Ni alloy directly from NiO and MgCl2 in an electrochemical cell. This method can eliminate the difficulties that may a...

Mg-Ni system draws attention due to the promising hydrogen storage properties of Mg2Ni. The proposed method involves the use of NiO and MgCl2 in an electrochemical cell to from Mg-Ni intermetallics directly. The electrodeoxidation of NiO was followed by combination of Mg and Ni in molten salt electrolytes. The products were characterized by XRD ana...

Mg-Ni system draws attention due to the promising hydrogen storage properties of Mg2Ni. The proposed method involves the use of NiO and MgCl2 in an electrochemical cell to from Mg-Ni intermetallics directly. The electrodeoxidation of NiO was followed by combination of Mg and Ni in molten salt electrolytes. The products were characterized by XRD ana...

IntroductionExperimentalResults and DiscussionConclusions Acknowledgements