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Filtreler
Bulunan: 21 Adet 0.001 sn
Yazar/lar : YILDIZ, Hüseyin Beki ... ✕Koleksiyon : Metalurji ve Malzeme ... ✕
Koleksiyon [3]
İlgili Araştırmacılar [1]
Ambargo Durumu [1]
Tam Metin [2]
Yayın Türü [2]
Yazar/lar [20]
Atıf Dizini [4]
Konu Başlıkları [20]
Yayıncı [16]
Yayın Tarihi [6]
Yayın Dili [2]
dc.description.provenance [5]
Erişime Açık

A Novel Architecture Based On A Conducting Polymer And Calixarene Derivative: İts Synthesis And Biosensor Construction

GÖKOĞLAN, Tuğba Ceren | SÖYLEMEZ, Saniye | KESİK, Melis | ÜNAY, Hande | SAYIN, Serkan | YILDIZ, Hüseyin Bekir | ÇIRPAN, Ali | TOPPARE, Levent

In this study, a novel amperometric glucose biosensor based on a selenium comprising conducting polymer and calixarene was developed. Firstly, poly(2-(2-octyldodecyl)-4,7-di(selenoph-2-yl)-2H-benzo[d][1,2,3]triazole), poly((SBTz)) was electrodeposited onto a graphite electrode by an electropolymerization technique. Then, a newly synthesized calixarene and gold nanoparticle (AuNP) mixture was used for the improvement of biosensor characteristics. GOx, as a model enzyme was immobilized on the modified electrode surface. The constructed surface serves as a sufficient immobilization platform for t ...Daha fazlası

Makale 2015 Royal Society of Chemistry 4 Görüntülenme
Erişime Açık

Calixarene assembly with enhanced photocurrents using P(SNS-NH2)/CdS nanoparticle structure modified Au electrode systems

SAYIN, Serkan | AZAK, Hacer | YILDIZ, Hüseyin Bekir | ÇAMURLU, Pınar | UYSAL AKKUŞ, Gülderen | TOPPARE, Lale | ERSÖZ, Mustafa

Two novel calix[n]arene-adorned gold electrodes producing high photocurrent intensities were successfully constructed by embedding gold electrode surfaces with both P(4-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl)benzenamine) conducting polymer and 4-mercaptoboronic acid-functionalized semiconductor CdS nanoparticles to facilitate the binding of calix[n]arene sulfonic acids with nanoparticles. This structure enabled an electron transfer cascade that both induced effective charge separation and efficiently generated photocurrent. The prepared electrodes were used to generate photocurrent by relying o ...Daha fazlası

Makale 2015 Royal Society of Chemistry 5 Görüntülenme
Erişime Açık

A photoelectrochemical device for water splitting using oligoaniline-crosslinked [Ru(bpy)2(bpyCONHArNH2)]+2 dye/IrO2 nanoparticle array on TiO2 photonic crystal modified electrode

YILDIZ, Hüseyin Bekir | BEZGİN ÇARBAŞ, Buket | SÖNMEZOĞLU, Savaş | KARAMAN, Mustafa | TOPPARE, Levent

This article describes the construction of photoelectrochemical cell system splitting water into hydrogen and oxygen using UV–vis light under constant applied voltage. Oligoaniline-crosslinked 2-(4-aminobenzyl)malonic acid functionalized IrO2·nH2O nanoparticles and visible light absorbing dye, [Ru(bpy)2(bpyCONHArNH2)+2] arrays on titanium dioxide (TiO2) photonic crystals modified electrodes were used as photoanode, and nanostructures based on bonding of Pt nanoparticles by using electropolymerization on poly 4-(2,5-di(thiophene-2-il)-1H-pyrrol-1-il)benzenamine P(SNS-NH2) conducting polymer mod ...Daha fazlası

Makale 2017 International Journal of Hydrogen Energy (Elsevier) 7 Görüntülenme
Erişime Açık

Hydrophobic coating of surfaces by plasma polymerization in an RF plasma reactor with an outer planar electrode: synthesis, characterization and biocompatibility

KARAMAN, Mustafa | GÜRSOY, Mehmet | AYKÜL, Fatmanur | TOSUN, Zahide | DEMİREL KARS, Meltem | YILDIZ, Hüseyin Bekir

This paper presents the plasma polymerization of poly(hexa fl uorobutyl acrylate)(PHFBA) thin fi lms on different substrates in an RF plasma reactor with an outer planar electrode. This reactor con fi guration allows large area uniformity and fast processing times. Deposition rates of up to 60 nm min−1 were observed. The in fl uence of plasma power and substrate temperature on the deposition rate, structure and wettability of the as-deposited fi lms was investigated. It was observed that better hydrophobicity was obtained at high plasma power and in low temperature conditions. PHFBA thin fi lms depo ...Daha fazlası

Makale 2017 Plasma Science And Technology (Hefei Institutes of Physical Science, Chinese Academy of Sciences and IOP Publishing) 5 Görüntülenme
Erişime Açık

Novel amperometric xanthine biosensor based on xanthine oxidase immobilized on electrochemically polymerized 10-[4H-dithieno(3,2-b:2′,3′-d)pyrrole-4-yl]decane-1-amine film

DERVISEVIC, Muamer | DERVISEVIC, Esma | AZAK, Hacer | ÇEVİK, Emre | ŞENEL, Mehmet | YILDIZ, Hüseyin Bekir

In this paper, a novel amperometric xanthine (X) biosensor is constructed by xanthine oxidase (XOx) immobilization on the pencil graphite electrode (PGE). Xanthine oxidase is immobilized using glutaraldehyde (GA) on the electrochemically polymerized conducting polymer film. The detection of xanthine is based on its consumed amount due to the enzymatic reaction of xanthine oxidase. The effects of polymer thickness, applied potential, pH, and temperature were investigated and optimum parameters were found to be five cycles, +5 V, +0.5 V and 30 °C, respectively. Storage stability, operation stabi ...Daha fazlası

Makale 2016 Elsevier 4 Görüntülenme
Erişime Açık

Enzyme‐Based Biosensors in Food Industry via Surface Modifications (Chapter 7)

GAZEL, Nilay | YILDIZ, Hüseyin Bekir

Enzyme technology has received great attention with improvements in biological remediation techniques. Enzyme-based biosensors can qualify as a measuring system as they permit the detection of biological events by detecting biochemical changes in biological processes. Advantages of biosensors are identification of even small quantities, cost effectiveness, and requirement of less power and less volume for identifying a wide linear range for usage [1]. Moreover, biosensors have high sensitivity, selectivity, and good response time for different kinds of applications.

Kitap Bölümü 2017 Wiley‐VCH Verlag GmbH & Co. KGaA 9 Görüntülenme
Erişime Açık

Construction of an Amperometric Cholesterol Biosensor Based on DTP(aryl)aniline Conducting Polymer Bound Cholesterol Oxidase

ÇEVİK, Emre | CERİT, Alaaddin | GAZEL, Nilay | YILDIZ, Hüseyin Bekir

In this study, an amperometric cholesterol biosensor was constructed based on cholesterol oxidase immobilized on a conducting 4-(4H-dithienol[3,2-b:2’,3’d]pyrrole-4)aniline polymer, (DTP(aryl)aniline). Glassy carbon electrodes were covered with P(DTP(aryl)aniline) which is used for the wiring of enzyme to the electrode surface by using electro-polymerization. The electron transfer was successfully made by the bio-catalytic activity and possession of the unique morphology of the polymer allowed efficient immobilization of the cholesterol oxidase enzyme. Analytical performances, linear range, de ...Daha fazlası

Makale 2018 Electroanalysis (Wiley) 10 Görüntülenme
Erişime Açık

Calixarene modified montmorillonite: A novel design for biosensing applications

SÖNMEZ, Burak | SAYIN, Serkan | YALÇINKAYA, Esra Evrim | AĞ SELECİ, Didem | YILDIZ, Hüseyin Bekir | ODACI DEMİRKOL, Dilek | TİMUR, Suna

Here we report the synthesis, characterization and application of calixarene (Calix) modified montmorillonite (Mt) as a platform for bio-applications such as biomolecule immobilization and biosensing technologies. This modification enhanced the biomolecule immobilization capability of Mt. Initially, amino-functionalised calixarenes (Calix-NH2) were synthesized and used as a modifier. X-ray diffraction, Fourier transform infrared spectroscopy, zeta potential and thermal gravimetric analysis were performed to verify the modification of the clay minerals. For the biosensor construction, Calix-NH2 ...Daha fazlası

Makale 2014 Royal Society of Chemistry 2 Görüntülenme
Erişime Açık

Construction of ferrocene modified conducting polymer based amperometric urea biosensor

DERVISEVIC, Muammer | DERVISEVIC, Esma | ŞENEL, Mehmet | ÇEVİK, Emre | YILDIZ, Hüseyin Bekir | ÇAMURLU, Pınar

Herein, an electrochemical urea sensing bio-electrode is reported that has been constructed by fi rstly electropolymerizing 4-(2,5-Di(thiophen-2-yl)-1H-pyrrol-1-yl)aniline monomer (SNS-Aniline) on Pencil Graphite Electrode (PGE), then modifying the polymer coated electrode surface with di-amino-Ferrocene (DAFc) as the mediator, and lastly Urease enzyme through glutaraldehyde crosslinking. The e ff ect of pH, temperature, polymer thickness, and applied potential on the electrode current response was investigated besides performing storage and operational stability experiments with the interferenc ...Daha fazlası

Makale 2017 Enzyme And Microbial Technology (Elsevier) 4 Görüntülenme
Erişime Açık

Synthesis of Various Calix [4] arene Derivatives with Mercaptoalkyl Chains and Their Application in Removing Cr (VI) from Aqueous Solution

SAYIN, Serkan | YILDIZ, Hüseyin Bekir | EYMÜR, Serkan

Four different mercaptoalkyl-substituted calixarene derivatives (5,11,17, 23-tetra-tert-butyl-25,27-bis(3-mercaptopropoxyl)-26,28-dihydroxycalix [4]arene, 25,27-bis(3-mercaptopropoxyl)-26,28-dihydroxycalix[4]arene, 25,27-bis(5-mercaptopentanoxyl)-26,28-dihydroxycalix[4]areneand5,17di-tert-butyl-11,23-di-carboxyl-26,28-bis(3-mercaptopropoxyl)-25,27-dihydroxycalix[4]arene) were synthesized. Their structures were characterized by Fourier transform infrared spectroscopy (FTIR), 1H and 13C NMR spectroscopy, and elemental analysis techniques. Moreover, their extraction capabilities at different para ...Daha fazlası

Makale 2018 Polycyclic Aromatic Compounds (Taylor and Francis) 5 Görüntülenme
Erişime Açık

MIPs and Aptamers for Recognition of Proteins in Biomimetic Sensing

MENGER, Marcus | YARMAN, Aysu | ERDŐSSY, Júlia | YILDIZ, Hüseyin Bekir | GYURCSÁNYI, Róbert Ervin | SCHELLER, Frieder Wolfram

Biomimetic binders and catalysts have been generated in order to substitute the biological pendants in separation techniques and bioanalysis. The two major approaches use either "evolution in the test tube" of nucleotides for the preparation of aptamers or total chemical synthesis for molecularly imprinted polymers (MIPs). The reproducible production of aptamers is a clear advantage, whilst the preparation of MIPs typically leads to a population of polymers with different binding sites. The realization of binding sites in the total bulk of the MIPs results in a higher binding capacity, however ...Daha fazlası

Makale 2016 2 Görüntülenme
Erişime Açık

A Novel Immobilization Matrix For The Biosensing Of Phenol: Self Assembled Monolayers Of Calixarenes

TAŞÇI, Filiz | SAYIN, Serkan | AĞ SELECİ, Didem | DEMİR, Bilal | AZAK, Hacer | YILDIZ, Hüseyin Bekir | ODACI DEMİRKOL, Dilek | TİMUR, Suna

Aim: The development of calixarene based phenol biosensor. Methods: This study describes the application of a calixarene derivative, 5,17-diamino-25,27-bis(3-thiol-1-oxypropane)-26,28-dihydroxycalix[4]arene (HS-Calix-NH2) which has both amino and thiol functionalities, in the practical surface modifications for biomolecule binding. The structure of HS-Calix-NH2 allows easy inter-action with Au surface and one-step biomolecule immo-bilization. Self-assembled monolayers (SAMs) of p-amino-functionalized mercaptoalkylcalixarene (HS-Calix-NH2) were formed onto the Au electrode. Then, Laccase (Lac) ...Daha fazlası

Makale 2017 Turkish Journal of Biochemistry (Turkish Biochemical Society) 7 Görüntülenme
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