Fabrication of a promising immobilization platform based on electrochemical synthesis of a conjugated polymer

2018-07-01
Buber, Ece
SÖYLEMEZ, SANİYE
UDUM, YASEMİN
Toppare, Levent Kamil
Since conjugated polymers are an important class of materials with remarkable properties in biosensor applications, in this study, a novel glucose biosensor based on a conjugated polymer was fabricated via the electropolymerization of the monomer 10,13-bis(4-hexylthiophen-2-yl)dipyridol[3,2-a:2',3'-c]phenazine onto a graphite electrode surface. Glucose oxidase (GOx) was used as the model biological recognition element. As a result of the enzymatic reaction between GOx and glucose, the glucose amount was determined by monitoring the change in the oxygen level associated with substrate concentration via the amperometric detection technique. The proposed system possessed superior properties with K-M(app) value of 0.262 mM, 2.88 x 10(-3) mM limit of detection and 105.12 mu A mM(-1) cm(-2) sensitivity. These results show that conjugated polymer film provides an effective and stable immobilization matrix for the enzyme. Finally, the biosensor was applied successfully to several commercially available beverage samples for glucose determination proving an inexpensive and highly sensitive system applicable for real time analyses.
COLLOIDS AND SURFACES B-BIOINTERFACES

Suggestions

A novel approach for the fabrication of a flexible glucose biosensor: The combination of vertically aligned CNTs and a conjugated polymer
GOKOGLAN, Tugba Ceren; SOYLEMEZ, Saniye; KESİK, Melis; DOGRU, Itir Bakis; TUREL, Onur; YÜKSEL, Recep; Ünalan, Hüsnü Emrah; Toppare, Levent Kamil (2017-04-01)
A novel flexible glucose biosensor using vertically aligned carbon nanotubes (VACNT) and a conjugated polymer (CP) was fabricated. A scaffold based on VACNT grown on aluminum foil (VACNT-Al foil) with poly (9,9-di-(2-ethylhexyl)-fluorenyl-2,7-diyl)-end capped with 2,5-diphenyl-1,2,4-oxadiazole (PFLO) was used as the immobilization matrix for the glucose biosensor. Glucose oxidase (GOx) was immobilized on a modified indium tin oxide (ITO) coated polyethylene terephthalate (PET) electrode surface. The biosens...
A new ethanol biosensor based on polyfluorene-g-poly(ethylene glycol) and multiwalled carbon nanotubes
Bekmezci, Siddika Aybuke; SÖYLEMEZ, SANİYE; Yilmaz, Gorkem; Udum, Yasemin A.; Yağcı, Yusuf; Toppare, Levent Kamil (Elsevier BV, 2020-01-05)
Functionalization of the conjugated polymers has gained considerable interest in the biomedical engineering and biosensing applications as distinct properties can be imparted to the corresponding pristine analogues. In the present work, we report a novel sensing platform for the quantification of ethanol through a macromolecular design involving polyfluorene-g-poly(ethylene glycol) (PF-g-PEG) and multiwalled carbon nanotubes (MWCNTs). First, poly(ethylene glycol) with fluorene functionality (PEG-FL) was syn...
Construction and amperometric biosensing performance of a novel platform containing carbon nanotubes-zinc phthalocyanine and a conducting polymer
Buber, Ece; Yuzer, Abdulcelil; Soylemez, Saniye; Kesik, Melis; Ince, Mine; Toppare, Levent Kamil (2017-03-01)
A novel glucose oxidase (GOx) based amperometric biosensor utilizing a conducting polymer (CP), multi walled carbon nanotubes (MWCNTs) and a novel water soluble zinc phthalocyanine (ZnPc) was constructed. For this purpose, a novel ZnPc was synthesized to examine the role of being a part of support material for enzyme deposition. High water solubility was achieved with the introduction of tetra quaternized imidazolyl moieties at the peripheral positions of phthalocyanine. In order to fabricate the proposed b...
Selenium containing conducting polymer based pyranose oxidase biosensor for glucose detection
Gokoglan, Tugba Ceren; SÖYLEMEZ, SANİYE; Kesik, Melis; Toksabay, Sinem; Toppare, Levent Kamil (2015-04-01)
A novel amperometric pyranose oxidase (PyOx) biosensor based on a selenium containing conducting polymer has been developed for the glucose detection. For this purpose, a conducting polymer; poly(4,7-bis(thieno[3,2-b]thiophen-2-yl)benzo[c][1,2,5] selenadiazole) (poly(BSeTT)) was synthesized via electropolymerisation on gold electrode to examine its matrix property for glucose detection. For this purpose, PyOx was used as the model enzyme and immobilised via physical adsorption technique. Amperometric detect...
An effective surface design based on a conjugated polymer and silver nanowires for the detection of paraoxon in tap water and milk
Turan, Janset; Kesik, Melis; SÖYLEMEZ, SANİYE; Goker, Seza; Coskun, Sahin; Ünalan, Hüsnü Emrah; Toppare, Levent Kamil (2016-06-02)
In this study, a novel approach for the fabrication of a biosensor utilizing a conducting polymer and silver nanowires is reported. To obtain immobilization platform for butyrylcholinesterase (BChE), a graphite electrode was modified with the poly(5,6-bis(octyloxy)-4,7-di(thieno[3][3,2-b]thiophen-2yl)benzo[c][1,2,5]oxoadiazole) (PTTBO) which has a hydrophobic alkyl chain as the pendant group providing hydrophobic nature to the matrix. Since biomolecules contain both hydrophobic and hydrophilic parts in thei...
Citation Formats
E. Buber, S. SÖYLEMEZ, Y. UDUM, and L. K. Toppare, “Fabrication of a promising immobilization platform based on electrochemical synthesis of a conjugated polymer,” COLLOIDS AND SURFACES B-BIOINTERFACES, pp. 392–396, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43185.