Melek Kiristi

Molybdenum disulphide (MoS 2) nanotube and tungsten oxide (W 18 O 49) nanowire were coated with poly(3-hexylthiophene) (P3HT) and poly(3,4-ethylenedioxythiophene) (PEDOT) by a radio frequency (RF: 13.56 MHz)-rotating plasma-modification method as alternative counter electrodes for dye-sensitised solar cells (DSSCs). Surface analysis showed the homo...

Purpose The purpose of this paper was to investigate the effects of hydrochloric acid (HCl), hydrazine, methyl methacrylate, styrene and hexamethyldisiloxane by radio-frequency (rf) plasma graftings on surface properties of wool and denim fabrics. Design/methodology/approach During plasma treatments, processing time was varied under optimized plas...

A highly versatile 2D screen-printing fabrication of nature-inspired fish swimmers is described. The new screen-printing approach offers large-scale cost-effective fabrication of efficient multi-functional chemically-powered motors. Diverse fish architectures, consisting of several predesigned printed layers, including the mid-body, head, tail, and...

Titanium tetrachloride plasma were used to enhance the electrochromic properties of vanadium oxide (V2O5) powder. The plasma treatments were performed in a rotating 13.56 MHz radio frequency plasma system with optimized parameters. Titanium tetrachloride plasma treated and untreated V2O5 powders were deposited by pyrolysis spraying methods on to in...

An effective and rapid bacterial killing nanotechnology strategy based on lysozyme-modified fuel-free nanomotors is demonstrated. The efficient antibacterial property of lysozyme, associated with the cleavage of glycosidic bonds of peptidoglycans present in the bacteria cell wall, has been combined with ultrasound (US)-propelled porous gold nanowir...

Efficient and controlled nanoscale propulsion in harsh environments requires careful design and manufacturing of nanomachines which can harvest and translate the propelling forces with high spatial and time resolution. Here we report a new class of artificial nanomachine, named magneto-acoustic hybrid nanomotor, which displays efficient propulsion...

The motivation of this study is using plasma modification to significantly increase the performance of the hot mix asphalt. The surface of mineral filler was modified by using three different components: tungsten disulphide under peroxide (WS2 – H2O2), tungsten disulphide under water (WS2 – H2O) and silicon dioxide (SiO2) nano powders. Hot mix asph...

A poly(vinylferrocene) (PVFc)/cellulose acetate (CA) fibers were obtained using an electrospinning method. The electrospinning process was controlled in situ with a quartz crystal microbalance (QCM) system. Fiber formation was observed through adjusting PVFc concentration. Morphological characteristics depending on the changes of atomic % ratio val...

A rational strategy for fabricating PEDOT-S/PVA (poly(4-(2,3-dihydrothieno [3,4-b] [1,4] — dioxin-2-yl-methoxy)-1-butanesulfonic acid/polyvinyl alcohol) nanofibers by in situ-plasma deposition was developed. The key process was electrospinning of EDOT-S/PVA and further its modification by oxygen plasma in a radio frequency (RF) plasma treatment cha...

Cleaning process applied to microorganisms on any substance is called as sterilization. This process can be applied with different methods such as chemical (EtO), filtration (gases, liquids), temperature sterilizations etc. However, these methods have some drawbacks. Plasma sterilization is one of the rapidly developing technique in the study of di...

Lower energy efficiency and higher cost are main challenges of current photovoltaics (PVs) and limit their using in widespread area. Nanostructure hybrid PVs that combined organic and inorganic nanoparticles, showed excellent performance with the intent of incorporating the advantages nano-scale materials 1,2 .

PEDOT films were deposited by microwave (MW) and radio frequency (RF) plasma in a medium pressure of 0.02 Torr without precursor. In-situ optical emission spectroscopy (OES) measurement was carried out to determine plasma phase and to adjust discharge parameters. The other spectroscopic methods were used to characterize deposited thin films and to...

The need for sensitive, selective, rapid and low-cost detection systems for DNA and DNA–drug interactions are in crucial demand for diagnostics and real-world applications. This work details the preparation of poly(3,4-ethylenedioxythiophene) (PEDOT) coated chitosan (CHIT) and the use of PEDOT coated CHIT modified disposable pencil graphite electro...

Electrochromic (EC) properties of tungsten trioxide (WO3) was improved with preparing hybrids of tungsten trioxide-titanium dioxide (WO3–TiO2) and tungsten trioxide-poly(3,4 ethylenedioxythiophene) (WO3–PEDOT) by a rotating capacitively coupled radio-frequency (RF: 13.56 MHz) plasma reactor. Energy-dispersive x-ray spectroscopy mapping results indi...

Electron beam and radio frequency (RF: 13.56 MHz) magnetron sputtering methods were used to obtain a highly transparent and conductive indium tin oxide (ITO) films. The coated thin films were treated by RF-H2O plasma in order to improve optical and electrical properties. RF-H2O plasma characteristics were investigated by optical emission spectrosco...

The paper presents the results of the research on a new polymer-membrane and gel electrolytes for electrochromic devices. A complementary solid-state electrochromic device consisting of cathodically coloring working electrode of WO3 and anodically coloring counter electrode of NiO films is prepared to compare the effects of gel or membrane forms of...

PEDOT (poly-3,4-ethylene dioxythiophene) is one of the most attractive polythiophene derivatives and has been studied intensively for last decades in many research areas as conductive polymer [1]. In this study, PEDOT was used to modify natural chitosan biopolymer using RF EDOT plasma produced at low pressure (0.02 Torr) with 13.56 MHz frequency at...

Chitosan nano powders were modified using RF hydrazine plasma produced at low pressure (26.66Pa) with 13.56MHz frequency at a power of 100W for 30min. Characterization and investigation of the properties of plasma-modified chitosan (PMCh) and non-modified chitosan (Ch) were carried out using an optical monochromator, FTIR, florescence analysis, TGA...