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Browsing by Author "Çakıroğlu, Bekir"

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A facile and effective immobilization of glucose oxidase on tannic acid modified CoFe2O4 magnetic nanoparticles

Seher Altun; Çakıroğlu, Bekir; Munteha Ozacar; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2015)

This article presents a study of glucose oxidase (GOx) immobilization by employing tannic acid (TA) modified-CoFe2O4 (CFO) magnetic nanoparticles which demonstrates novel aspect for enzyme immobilization. By using the ...
A Photoelectrochemical Biosensor Fabricated using Hierarchically Structured Gold Nanoparticle and MoS2 on Tannic Acid Templated Mesoporous TiO2

Çakıroğlu, Bekir; Özacar, Mahmut (WILEY-V C H VERLAG GMBH, 2020)

In a tannic acid assisted synthesis of mesoporous TiO2, tannic acid was used as a cost effective and non-toxic template for pore formation. Meanwhile, a gold nanoparticles (Au NPs) deposited TiO2 nanocomposite was coated ...
A Photoelectrochemical Biosensor Fabricated using Hierarchically Structured Gold Nanoparticle and MoS2 on Tannic Acid Templated Mesoporous TiO2

Çakıroğlu, Bekir; Çakıroğlu, Bekir; Özacar, Mahmut (WILEY-V C H VERLAG GMBH, 2019)

In a tannic acid assisted synthesis of mesoporous TiO2, tannic acid was used as a cost effective and non-toxic template for pore formation. Meanwhile, a gold nanoparticles (Au NPs) deposited TiO2 nanocomposite was coated ...
A photoelectrochemical glucose and lactose biosensor consisting of gold nanoparticles, MnO2 and g-C3N4 decorated TiO2

Çakıroğlu, Bekir; Yigit Can Demirci; Emine Gokgoz; Özacar, Mahmut (ELSEVIER SCIENCE SA, 2019)

In this study, an innovative light-sensitive hybrid material was used for the photoelectrochemical (PEC) biosensor fabrication. Herein, gold nanoparticles modified mesoporous TiO2 was coated on an indium fin oxide substrate, ...
A self-powered photoelectrochemical biosensor for H2O2, and xanthine oxidase activity based on enhanced chemiluminescence resonance energy transfer through slow light effect in inverse opal TiO2

Çakıroğlu, Bekir; Özacar, Mahmut; Özacar, Mahmut (ELSEVIER ADVANCED TECHNOLOGY, 2019)

TiO2 inverse opal photonic crystals (IOPCs) were fabricated by using polystyrene template. TiO2 IOPCs based photoelectrochemical (PEC) biosensor was fabricated for the precise and stable detection of Heme without external ...
A self-powered photoelectrochemical glucose biosensor based on supercapacitor Co3O4-CNT hybrid on TiO2

Çakıroğlu, Bekir; Çakıroğlu, Bekir; Özacar, Mahmut (ELSEVIER ADVANCED TECHNOLOGY, 2018)

In this study, a photoelectrochemical (PEC) biosensor was constructed by depositing supercapacitor carbon nanotubes (CNT) and Co3O4 onto the anatase TiO2 coated ITO electrodes. Herein, supercapacitor Co3O4 was employed as ...
Covalent immobilization of trypsin onto modified magnetite nanoparticles and its application for casein digestion

Atacan, Keziban; Çakıroğlu, Bekir; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2017)

The immobilization method consists of the production magnetite nanoparticles (Fe3O4) by solvothermal treatment of FeCl3 and sodium acetate (NaAc) in the presence of ethylene glycol. Subsequently, the surface of magnetite ...
Efficient protein digestion using immobilized trypsin onto tannin modified Fe3O4 magnetic nanoparticles

Atacan, Keziban; Atacan, Keziban; Çakıroğlu, Bekir; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2017)

Fe3O4 magnetic nanoparticles (MNPs) were prepared via solvothermal method. A commercially available trypsin was covalently immobilized onto MNPs modified with tannin (T) via a novel binding process. The morphology, structure, ...
Elektrokimyasal ve fotoelektrokimyasalbiyosensör sistemlerinin geliştirilmesi = Development of electrochemical and photoelectrochemical biosensor systems

Çakıroğlu, Bekir (Sakarya Üniversitesi, 2021)

Bu tez çalışmasında, biyolojik açıdan önemli olan glukoz, hidrojen peroksit, ksantin oksidaz elektrokimyasal ve fotoelektrokimyasal olarak ölçülmüştür. Materyallerin sentezinde mümkün olduğunca yeşil kimya esaslı, ucuz ve ...
Improvement of the stability and activity of immobilized trypsin on modified Fe3O4 magnetic nanoparticles for hydrolysis of bovine serum albumin and its application in the bovine milk

Atacan, Keziban; Atacan, Keziban; Çakıroğlu, Bekir; Çakıroğlu, Bekir; Özacar, Mahmut (ELSEVIER SCI LTD, 2016)

Trypsin (EC 3.4.21.4) was successfully immobilized on the surface of Fe3O4 magnetic nanoparticles that had been pre-treated with gallic acid (GA). Measurements of protein load by using Bradford assay and the trypsin-catalyzed ...
Novel hydroxyapatite/graphene oxide/collagen bioactive composite coating on Ti16Nb alloys by electrodeposition

Yılmaz, Eren; Çakıroğlu, Bekir; Gökçe, Azim; Fındık, Fehim; H. Ozkan Gulsoy; Nagihan Gulsoy; Ozal Mutlu; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2019)

A novel implant coating material containing graphene oxide (GO) and collagen (COL), and hydroxyapatite (HA) was fabricated with the aid of tannic acid by electrodeposition. The surface of Ti16Nb alloy was subjected to ...
Photoelectrochemical and Non-Enzymatic Glucose Sensor Based on Modified Fehling's Test by Using Ti/TiO2 NTs-rGO-Cu2O Electrode

Çakıroğlu, Bekir; Özacar, Mahmut (ELECTROCHEMICAL SOC INC, 2019)

Herein, semiconductor Cu2O/reduced graphene oxide (rGO) coated TiO2 nanotubes (NTs) arrayed titanium foil was used as a photoelectrochemical (PEC) glucose sensor. The concentration of Cu2O nanoparticles (NPs) obtained by ...
Reduced Graphene Oxide/Pt Nanoparticles/Zn-MOF-74 Nanomaterial for a Glucose Biosensor Construction

Didem Uzak; Atheer Atiroglu; Vesen Atiroglu; Çakıroğlu, Bekir; Özacar, Mahmut (WILEY-V C H VERLAG GMBH, 2019)

In this study, a new glucose biosensor was fabricated by immobilizing glucose oxidase (GOx) on platinum nanoparticles (Pt NPs) decorated reduced graphene oxide (rGO)/Zn-MOF-74 hybrid nanomaterial. Herein, the biosensor ...
Tannic Acid Modified Electrochemical Biosensor for Glucose Sensing Based on Direct Electrochemistry

Çakıroğlu, Bekir; Özacar, Mahmut (WILEY-V C H VERLAG GMBH, 2017)

A novel glucose biosensor was constructed through the immobilization of glucose oxidase (GOx) on gold nanoparticles (Au NPs) deposited, and chemically reduced graphene oxide (rGO) nanocomposite. In the synthesis, tannic ...
Tannic Acid-Reduced Graphene Oxide Deposited with Pt Nanoparticles for Switchable Bioelectronics and Biosensors Based on Direct Electrochemistry

Bilge Akkaya; Çakıroğlu, Bekir; Özacar, Mahmut (AMER CHEMICAL SOC, 2018)

In this study, we reported a novel biosensor based on direct electrochemistry of glucose oxidase (GOx) on a tannic acid-reduced graphene oxide nanocomposite modified glassy carbon electrode deposited with Pt nanoparticles. ...