Aysegul Uygun Oksuz

T.C. Süleyman Demirel Üniversitesi | SDU · Department of Chemistry

Polylactic acid (PLA) being a renewable polyester have extensively researched in the biomedical field due to its non-toxicity, high biocompatibility, and easy processing properties. However, low functionalization ability and hydrophobicity limit its applications and hence demands physical and chemical modifications to overcome these limitations. Co...

Electrospun fibers of 7-methyl-4-phenyl-8-(4’-methoxy)phenylazopyrazolo[5,1-c][1,2,4]triazine-3-carboxylic acid ethyl ester (PCA-4) and 7-methyl-4-phenyl-8-(2’-methoxy)phenylazopyrazolo[5,1-c][1,2,4]triazine-3-carboxylic acid ethyl ester (PCA-2) were produced using electrospinning technique. Poly(methylmethacrylate) (PMMA) was used as support elect...

Artificial motors (robots) that are inspired by natural motors have captivated much attention with their attractive performances and special features. These miniaturized nano/micromotors have succeeded many important tasks in different fields including (bio)sensing, cargo transport, cell isolation and trapping, nanosurgery, gene therapy, and drug d...

In the emerging field of perovskite solar cells, rational hole selective layer development is considered a double‐engine of this progress. To tap into the full potential and accelerate the commercialization path, Machine Learning (ML) is being tasked for perovskite screening. However, sincere efforts have not led to the design of hole selective lay...

The aim of this study is to fabricate streptomycin sulfate (STM)-loaded bis-chalcone/poly(methyl methacrylate) (PMMA)/poly(ethylene oxide) (PEO) based fiber mats for drug delivery and antibacterial applications. This study presents the synergetic effect of a bis-chalcone derivatives ((2E,6E)‐2,6–bis[(thiophen‐2–yl)methylene]cyclohexanone (BTC) or (...

A facile and non-enzymatic electrochemical sensor is developed by the simple electrodeposition of Prussian Blue (PB) on conductive indium tin oxide coated polyethylene terephthalate (PET) substrate. The conductive flexible thin film based on PB were prepared with electrochemical deposition from acidic solution containing a mixture ferric and ferric...

Perovskites as a semiconductor are of profound interest and arguably, the investigation on the distinctive perovskite composition is paramount to fabricate efficient devices and solar cells. We probed the role of anion and cations and their impact on optoelectronic and photovoltaic properties. We report a machine learning approach to predict the ba...

In this present study, the preparation of chitosan functionalized gold‑nickel wire nanomachines (nanomotors) ([email protected] NMs) for motion-based double-stranded deoxyribonucleic acid (dsDNA) recognition and detection was described. Synthesis of the nanomachines was accomplished by Ni layer formation using direct current (DC) magnetron sputteri...

Enhanced electrochemical and optical properties of poly(3-methylthiophene)/tungsten oxide (PMeT/WO3) hybrid nanostructure based electrochromic devices (ECDs) are presented. Hybrid nanostructures were prepared by electrodeposition technique in the presence of four different ionic liquids; 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4), 1-bu...

A library of metal oxide‐conjugated polymer composites was prepared, encompassing of WO3‐polyaniline (PANI), WO3‐poly(N‐methylaniline) (PMANI), WO3‐poly(2‐fluoroaniline) (PFANI), WO3‐polythiophene (PTh), WO3‐polyfuran (PFu) and WO3‐poly(3,4‐ethylenedioxythiophene) (PEDOT) which were used as hole selective layers for perovskite solar cells (PSCs) de...

An electrochemical-sensing platform for determination of dopamine (DA) was fabricated using MnO2–polyaniline (MnO2–PANI) composite. The MnO2–PANI composite was prepared through in situ radio-frequency plasma polymerization of aniline monomer over MnO2 under rotating conditions and followed by external iodine doping to boost conductivity of final I2...

The synthesis and biomedical applications of nano/micromotors have attracted great attention. In this work, preparation and characterization of catalytic gold/poly(3,4-ethylenedioxythiophene)/platinum (Au/PEDOT/Pt) micromotors were reported to present their contribution for cancer biomarker miRNA-21 detection. Potential use of these motors for poss...

Artificial nano‐ and microswimmers are promising as versatile nanorobots for applications in biomedicine, environmental chemistry, and materials science. Herein, a hybrid micromotor containing a conjugated polymer (poly(3,4‐ethylenedioxythiophene) (PEDOT), and a catalytic structure composed of platinum (Pt) synthesized using a template‐supported el...

This work introduces improved performances of self-propelled tubular micromotors based on radio frequency (RF)–rotating plasma-prepared graphene oxide-poly(aniline) (GO-PANI), graphene oxide/poly(ethylaniline) (GO-PEANI), and graphene oxide/poly(fluoroaniline) (GO-PFANI) composites as outer layer and platinum (Pt) as the catalytic inner layer. Scan...

Functionalized micro/nanomotors having immobilized biological molecules provide excellent and powerful tools for the detection of target molecules. Based on surface modifications and mobilities of micromotors, we report herein a new experimental design of high-speed, self-propelled and plasma modified micromotors for biomedical applications. Within...

This study shows that the model fitting based on machine learning (ML) from experimental data can successfully predict the electrochromic characteristics of single- and dual-type flexible electrochromic devices (ECDs) by using tungsten trioxide (WO3) and WO3/vanadium pentoxide (V2O5), respectively. Seven different regression methods were used for e...

We showed that nickel Prussian blue analogue (NiPBA) films were electrochemically deposited onto a conducting transparent indium tin oxide coated with polyethylene terephthalate electrodes. The flexible NiPBA films were characterized by means of scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDS), X-ray photoelectronspectros...

In the present study, the electrosynthesis and the electrochemical characterization of azo dyes doped poly(3,4-ethylenedioxythiophene (PEDOT) were described. PEDOT film was electrochemically deposited onto indium doped tin oxide (ITO) coated/glass electrode, following azo dyes adsorption. The electropolymerized-PEDOT films on ITO glass were doped w...

The electrochemical behavior of (2E,5E)-2,5-dibenzylidenecyclopentanone (P1) and (2E,5E)-2,5-bis(4-nitrobenzyli-dene)cyclopentanone (P2) known as bis-chalcone derivatives was studied by cyclic voltammetry (CV) using an indium tin oxide (ITO) as the working electrode. Repeated cyclic voltammograms measurements exhibited excellent long-term redox sta...

We managed to provide one-step facile electrochromic device (ECD) preparation to incorporate two cathodic coloring components into lithium ion (Li+)-doped UV-curable electrolyte. The hybrid-based flexible ECDs were fabricated by using tungsten trioxide (WO3) and poly(3,4-ethylenedioxythiophene) (PEDOT) as electrochromic components without the need...

In this work, the electrochromic (EC) application of the hybrid fibers based on bis‐thiomethylcyclohexanone derivatives is evaluated. For this purpose, two new bis‐thiomethylcyclohexanone derivatives, 2,6‐bis(phenyl(phenylthio)methyl)cyclohexanone (PPTMC) and 2,6‐bis((2,6‐dichlorophenyl)(phenylthio)methyl)cyclohexanone (CPPTMC), were synthesized by...

In this work, the electrochromic (EC) application of the hybrid fibers based on bisthiomethylcyclohexanone derivatives is evaluated. For this purpose, two new bisthiomethylcyclohexanone derivatives, 2,6-bis(phenyl(phenylthio)methyl)cyclohexanone (PPTMC) and 2,6-bis((2,6-dichlorophenyl)(phenylthio)methyl)cyclohexanone (CPPTMC), were synthesized by t...

Vanadium pentoxide (V2O5) electrochromic material was modified by furan plasma polymerization method and electrochromic properties of the new V2O5/Polyfuran (PFu) composite material were examined in three different electrolytes (lithium perchlorate (LiClO4), lithium trifluoromethanesulfonate (LiTRIF), sodium perchlorate (NaClO4), which influence si...

The electrical properties of Au/PEDOT:WO3/p-Si hybrid devices were studied in terms of current–voltage (I–V) and capacitance–voltage (C–V) measurements. Poly (3,4-ethylene dioxythiophene/tungsten trioxide (PEDOT:WO3) composite was prepared by an in situ chemical oxidative polymerization of monomer in 1-butyl-3-methylimidazoliumtetrafluoroborate (BM...

In this study, nonthermal atmospheric pressure plasma (NTAPP) method was performed for the sterilization of natural rose water which has a great potential as drug and food additive. NTAPP is applied to rose water containing mesophilic aerobic bacteria, mold and yeast. Experiments were carried out at a voltage of 500 V, a rotating speed of 500 rpm a...

Self-propelled catalytic micromotors offer considerable promise in terms of many applications. Catalytic micromotors are strongly influenced by the presence and concentration of specific ions and chemicals in the environment, making them useful as sensors and actuators. In this work, copper (Cu)-platinum (Pt) micromotors were fabricated by using th...

This study focuses on the electrochromic device (ECD) applications of poly(3,4-ethylenedioxythiophene)/tungsten oxide (PEDOT/WO3) hybrid nanofibers prepared via electrospinning method. Nanoporous WO3 films were initially electrosynthesized on Pt sheet. The PEDOT layer was electropolymerized onto the entire surface of the WO3 nanoporous host framewo...

The tungsten oxide (WO3) nanofibers were grown directly onto an ITO-coated glass via an electrospinning method for electrochromic applications. The electrochromic properties of WO3 nanofibers were investigated in the presence of different electrolytes including a series of ionic liquids and classic LiClO4-PC system. A significant optical modulation...

Nanocomposites of graphene (GR) with polythiophene (PTh) or poly(3,4-ethylenedioxythiophene) (PEDOT) through a versatile and environmentally benign process, utilizing radio frequency (RF) plasma polymerization, were made. The morphological characterization of these nanocomposites was performed using various microscopy techniques and it revealed tha...

This study reports that quartz crystal microbalance (QCM) is used to determine the effect of chitosan derivatives obtained by chemical method on biofilm inhibition. Plasma grafted chitosan (pchito) was modified chemically with both 5-methyl-4-phenyl-thiophene-3-carboxylic acid (MFTKA) and 4-(thiophene-2-sulfonylamino)-benzoic acid (TSABA). The quar...

Tungsten trioxide‐poly(3,4‐ethylenedioxythiophene) (WO3‐PEDOT) and tungsten trioxide‐polyfuran (WO3‐PFu) were prepared by rf rotating plasma polymerization. Electrochromic hybrid thin films were fabricated onto flexible polyethylene terephthalate (PET)/ indium tin oxide (ITO) film using electron beam evaporation method. In order to deeply character...

The preparation of polyfuran–graphene (PFu/GR) and polyfuran–multi-walled carbon nanotube (PFu/MWCNT) nanocomposites was carried out via a plasma polymerization. The characterizations of the pure GR, MWCNTs and the nanocomposites coated with PFu were performed using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scan...

Modification of W5O14 and MoS2 nanostructures was carried out using 3,4-ethylenedioxythiophene monomer in a capacitively coupled, RF rotating plasma reactor. Raman spectroscopy and X-ray diffraction (XRD) measurements were used for structural characterization. The surface morphologies of nanomaterials were investigated using transmission electron m...

This study presents the preparation of graphene (GR) nanocomposites with polyaniline (PANI) and polypyrrole (PPy) through the fast, versatile and environmentally friendly process of radio frequency (RF)-plasma polymerization. Morphological characterization of the nanocomposites is performed using scanning electron microscopy (SEM) and shows that th...

Two bis-chalcone derivatives, (2E,6E)-2,6-bis[(thiophen-2-yl)methylene]cyclohexanone (C1) and (2E,6E)-2,6-bis[(furan-2-yl)methylene]cyclohexanone (C2)-based electrochromic (EC) nanofibers were produced in the presence of poly(methyl methacrylate) (PMMA) as supporting polymer using the electrospinning technique. The scanning electron microscopy (SEM...

The aim of this work is to investigate the suitability of electrospinning for biomedical applications and to produce fast-dissolving drug delivery through uniform dextran nanofiber nonwoven maps. To prepare oral fast-dissolving drug delivery nonwoven maps via electrospinning technology, ibuprofen (Ibu) and acetylsalicylic acid (ASA) as the model dr...

We report the first successful applications of tungsten oxide/conducting polymer hybrid nanofiber assemblies in electrochromic devices. Poly(3,4-ethylenedioxythiophene)/tungsten oxide (PEDOT/WO3) and polypyrrole/tungsten oxide (PPy/WO3) composites were prepared by an in situ chemical oxidative polymerization of monomers in different ionic liquids;...

Multi-walled carbon nanotube (MWCNT) was modified via plasma polymerization of aniline by applying different radio frequency (RF: 13.56 MHz) powers. The modified MWCNTs were investigated in terms of morphology, chemical structure and thermal behaviors, indicating the formation of composites based on the surface modification of MWCNT with polyanilin...

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...

A flexible e-textile has growing curiosity in the NEMS and MEMS of science and technology. This work has been done fabrication of electrochromic device based on wool textile substrates. Indium tin oxide (ITO) or platinum (Pt) and tungsten oxide WO3 film layers were used as conductive and the electrochromic material, respectively. All active layers...

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...

Tungsten oxide (WO3) thin films were deposited onto flexible substrates using radio frequency magnetron sputtering for high electrochromic performance purposes. The effects of both non-aqueous electrolytes (lithium perchlorate (LiClO4), lithium trifluoromethanesulfonate (LiTRIF)) and the electrochromic thickness layers on the electrochromic propert...

Operating at ambient pressure allows industry (such as textile industry) to move from batch to continuous processing and also facilitates much simpler equipment designs with reduced maintenance requirements due to the lack of vacuum pumps, seals, etc [1]. Recent advances in this technology have included the development plasma techniques which makes...

Vanadium oxide/poly (3,4- ethylenedioxythiophene)(V2O5-PEDOT) hybrid materials were prepared in a rotating quartz plasma reactor via capacitively coupled radio frequency (RF 13.56 MHz) plasma. Thin films of V2O5-PEDOT hybrid and V2O5 were obtained by electron beam evaporation technique onto flexible PET substrate for electrochromic devices (ECDs) a...

Much effort is currently devoted to implementing new materials in electrodes that will be used in electrochromic (EC) technology. Tungsten oxide (WO3) has emerged as one of the key materials for EC devices (ECDs) since it shows the best EC activity among transition metal oxides. However, hybrid nanostructures have been investigated in order to enha...

Porphyrin sensitizer (Por) containing 4-carboxybiphenyl and 2-thienyl and its metallated Zn(II) derivative (ZnPor) were synthesized and investigated. The porphyrin dyes were characterized by MALDI-MS, ¹H NMR, UV–vis, fluorescence and cyclic voltammetry methods. It was found that using of biphenyl bridge between anchoring group and porphyrin core en...

Electrochromic textile was obtained by magnetron sputtering process on flexible electrospun conductive polyethylene terephthalate (PET) fiber mesh. Vanadium oxide (V2O5) was magnetron sputtered onto conductive PET/PEDOT-PSS fiber substrate under 100 W RF and room temperature conditions. V2O5 coated conducting fabrics were characterized by means of...

A quartz crystal microbalance DNA biosensor based on plasma prepared polythiophene /titanium dioxide (PT/TiO2) nanocomposite was developed for the detection of genetically modified organisms (GMOs). DNA hybridization was studied by quartz crystal microbalance (QCM) and cyclic voltammetry (CV) measurements. Single stranded DNA probes were immobilize...

In this study, the properties of composites of polyfuran/chitosan (PFu/Ch) were electrochemically investigated as potential glucose sensors. Polyfuran (PFu) and polyfuran/chitosan composite films were coated onto indium thin oxide electrode by atmospheric pressure plasma glow discharge method. The prepared films were characterized by Fourier transf...

Poly(3,4-ethylenedioxxythiophene) (PEDOT), polyaniline (PANI) and polythiophene (PTh) based multi-walled carbon nanotube (MWCNT) composites were successfully prepared using RF-rotating plasma grafting method. Morphological characterizations of composites were determined using scanning electron microscopy (SEM), which showed that conducting polymers...

This study focuses on the electrochromic device (ECD) applications of poly(3,4-ethylenedioxythiophene)/tungsten oxide (PEDOT/WO3) hybrid nanofibers prepared via electrospinning method. Nanoporous WO3 films were initially electrosynthesized on Pt sheet. The PEDOT layer was electropolymerized onto the entire surface of the WO3 nanoporous host framewo...

This study presents the modification of multi-walled carbon nanotube (MWCNT) with poly(3-hexylthiophene) (P3HT) and polypyrrole (PPy) through the fast, versatile, and environmentally friendly process of radiofrequency (RF)-rotating plasma polymerization. Morphological characterization of composites was performed using scanning electron microscopy (...

Poly(3,4-ethylenedioxythiophene)/tungsten (PEDOT/W) composites were prepared by an in situ chemical oxidative polymerization of 3,4-ethylenedioxythiophene in different ionic liquids; 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), 1-butyl- 3-methylimidazolium bis(trifluoromethylsul...

MoS2 nanotubes were coated with conductive polymer thiophene by atmospheric pressure radio-frequency (RF) glow discharge. MoS2 nanotubes were prepared by thermal decomposition of hexadecylamine (HDA) intercalated laminar MoS2 precursor on anodized aluminum oxide template and the thiophene was polymerized directly on surface of these nanotubes as in...

Two ferrocenyl-substituted N-acetyl-2-pyrazolines, N-acetyl-3-(2-furyl)-5-ferrocenyl-2-pyrazoline (Fc-1) and N-acetyl-3-(2-thienyl)-5-ferrocenyl-2-pyrazoline (Fc-2) electrospun fibers, were produced in the presence of plasma-modified chitosan (PMCh)/poly(ethylene terephthalate) (PET) supporting polymers with an electrospinning method. The morpholog...