TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Chaiyo, Sudkate
AU  - Zavašnik, Janez
AU  - Zagar, Kristina
AU  - Kalcher, Kurt
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2438
AB  - A reagentless third generation electrochemical glucose biosensor was fabricated based on wiring the template enzyme glucose oxidase (GOx) with graphene nanoribbons (GN) in order to create direct electron transfer between the co-factor (flavin adenine dinucleotide, FAD) and the electrode. The strategy involved: (i) isolation of the apo-enzyme by separating it from its co-enzyme; (ii) preparation of graphene nanoribbons (GN) by oxidative unzipping of multi-walled carbon nanotubes; (iii) adsorptive immobilization of GNs on the surface of a screen printed carbon electrode (SPCE); (iv) covalent attachment of FAD to the nanoribbons; (v) recombination of the apo-enzyme with the covalently bound FAD to the holoenzyme; and (vi) stabilization of the bio-layer with a thin membrane of Nafion. The biosensor (referred to as GN/FAD/apo-GOx/Nafion/SPCE) is operated at a potential of +0.475 V vs Ag/AgCl/{3 M KCl} in flow-injection mode with an oxygen-free phosphate buffer (pH 7.5) acting as a carrier. The signals are linearly proportional to the concentration of glucose in the range from 50 to 2000 mgai...L-1 with a detection limit of 20 mgai...L-1. The repeatability (10 measurements, at 1000 mgai...L-1 glucose) is +/- 1.4% and the reproducibility (5 sensors, 1000 mgai...L-1 glucose) is +/- 1.8%. The biosensor was applied to the determination of glucose in human serum.
PB  - Springer Wien, Wien
T2  - Microchimica Acta
T1  - Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor
VL  - 184
IS  - 4
SP  - 1127
EP  - 1134
DO  - 10.1007/s00604-017-2115-5
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Chaiyo, Sudkate and Zavašnik, Janez and Zagar, Kristina and Kalcher, Kurt",
year = "2017",
abstract = "A reagentless third generation electrochemical glucose biosensor was fabricated based on wiring the template enzyme glucose oxidase (GOx) with graphene nanoribbons (GN) in order to create direct electron transfer between the co-factor (flavin adenine dinucleotide, FAD) and the electrode. The strategy involved: (i) isolation of the apo-enzyme by separating it from its co-enzyme; (ii) preparation of graphene nanoribbons (GN) by oxidative unzipping of multi-walled carbon nanotubes; (iii) adsorptive immobilization of GNs on the surface of a screen printed carbon electrode (SPCE); (iv) covalent attachment of FAD to the nanoribbons; (v) recombination of the apo-enzyme with the covalently bound FAD to the holoenzyme; and (vi) stabilization of the bio-layer with a thin membrane of Nafion. The biosensor (referred to as GN/FAD/apo-GOx/Nafion/SPCE) is operated at a potential of +0.475 V vs Ag/AgCl/{3 M KCl} in flow-injection mode with an oxygen-free phosphate buffer (pH 7.5) acting as a carrier. The signals are linearly proportional to the concentration of glucose in the range from 50 to 2000 mgai...L-1 with a detection limit of 20 mgai...L-1. The repeatability (10 measurements, at 1000 mgai...L-1 glucose) is +/- 1.4% and the reproducibility (5 sensors, 1000 mgai...L-1 glucose) is +/- 1.8%. The biosensor was applied to the determination of glucose in human serum.",
publisher = "Springer Wien, Wien",
journal = "Microchimica Acta",
title = "Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor",
volume = "184",
number = "4",
pages = "1127-1134",
doi = "10.1007/s00604-017-2115-5"
}

Mehmeti, E., Stanković, D., Chaiyo, S., Zavašnik, J., Zagar, K.,& Kalcher, K.. (2017). Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor. in Microchimica Acta
Springer Wien, Wien., 184(4), 1127-1134.
https://doi.org/10.1007/s00604-017-2115-5

Mehmeti E, Stanković D, Chaiyo S, Zavašnik J, Zagar K, Kalcher K. Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor. in Microchimica Acta. 2017;184(4):1127-1134.
doi:10.1007/s00604-017-2115-5 .

Mehmeti, Eda, Stanković, Dalibor, Chaiyo, Sudkate, Zavašnik, Janez, Zagar, Kristina, Kalcher, Kurt, "Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor" in Microchimica Acta, 184, no. 4 (2017):1127-1134,
https://doi.org/10.1007/s00604-017-2115-5 . .

TY  - JOUR
AU  - Samphao, Anchalee
AU  - Kunpatee, Kanjana
AU  - Prayoonpokarach, Sanchai
AU  - Wittayakun, Jatuporn
AU  - Šovrc, Ľubomír
AU  - Stanković, Dalibor
AU  - Zagar, Kristina
AU  - Ceh, Miran
AU  - Kalcher, Kurt
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2034
AB  - An ethanol biosensor based on alcohol dehydrogenase (ADH) attached to Au seeds decorated on magnetic nanoparticles (Fe3O4"Au NPs) is presented. ADH was immobilized on Fe3O4"Au NPs, which were subsequently fixed by a magnet on a carbon paste electrode modified with 5% (m:m) MnO2. Optimum conditions for the amperometric determination of ethanol with the biosensor were as follows: working potential +0.1 V (vs. Ag/AgCl); supporting electrolyte: 0.1 M phosphate buffer solution at pH 6.8 containing 0.25 mM of the coenzyme (NAD+); working electrode: carbon paste with magnetically attached Fe3O4"Au NPs (0.012 mg . cm(-2) electrode area) with immobilized alcohol dehydrogenase (120 units per cm(2) of electrode area). Linearity between signal and concentration was found for the range from 0.1 to 2.0 M ethanol (r(2) = 0.995) with a detection limit of 0.07 M, a sensitivity of 0.02 mu A . mM(-1) . cm(-2), a reproducibility of 4.0% RSD, and a repeatability of 2.7% RSD. The results for the determination of ethanol in alcoholic beverages showed good agreement with gas chromatography (GC) with recovery of 96.0-108.8%.
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Electroanalysis
T1  - An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles
VL  - 27
IS  - 12
SP  - 2829
EP  - 2837
DO  - 10.1002/elan.201500315
ER  - 

@article{
author = "Samphao, Anchalee and Kunpatee, Kanjana and Prayoonpokarach, Sanchai and Wittayakun, Jatuporn and Šovrc, Ľubomír and Stanković, Dalibor and Zagar, Kristina and Ceh, Miran and Kalcher, Kurt",
year = "2015",
abstract = "An ethanol biosensor based on alcohol dehydrogenase (ADH) attached to Au seeds decorated on magnetic nanoparticles (Fe3O4"Au NPs) is presented. ADH was immobilized on Fe3O4"Au NPs, which were subsequently fixed by a magnet on a carbon paste electrode modified with 5% (m:m) MnO2. Optimum conditions for the amperometric determination of ethanol with the biosensor were as follows: working potential +0.1 V (vs. Ag/AgCl); supporting electrolyte: 0.1 M phosphate buffer solution at pH 6.8 containing 0.25 mM of the coenzyme (NAD+); working electrode: carbon paste with magnetically attached Fe3O4"Au NPs (0.012 mg . cm(-2) electrode area) with immobilized alcohol dehydrogenase (120 units per cm(2) of electrode area). Linearity between signal and concentration was found for the range from 0.1 to 2.0 M ethanol (r(2) = 0.995) with a detection limit of 0.07 M, a sensitivity of 0.02 mu A . mM(-1) . cm(-2), a reproducibility of 4.0% RSD, and a repeatability of 2.7% RSD. The results for the determination of ethanol in alcoholic beverages showed good agreement with gas chromatography (GC) with recovery of 96.0-108.8%.",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Electroanalysis",
title = "An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles",
volume = "27",
number = "12",
pages = "2829-2837",
doi = "10.1002/elan.201500315"
}

Samphao, A., Kunpatee, K., Prayoonpokarach, S., Wittayakun, J., Šovrc, Ľ., Stanković, D., Zagar, K., Ceh, M.,& Kalcher, K.. (2015). An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles. in Electroanalysis
Wiley-V C H Verlag Gmbh, Weinheim., 27(12), 2829-2837.
https://doi.org/10.1002/elan.201500315

Samphao A, Kunpatee K, Prayoonpokarach S, Wittayakun J, Šovrc Ľ, Stanković D, Zagar K, Ceh M, Kalcher K. An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles. in Electroanalysis. 2015;27(12):2829-2837.
doi:10.1002/elan.201500315 .

Samphao, Anchalee, Kunpatee, Kanjana, Prayoonpokarach, Sanchai, Wittayakun, Jatuporn, Šovrc, Ľubomír, Stanković, Dalibor, Zagar, Kristina, Ceh, Miran, Kalcher, Kurt, "An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles" in Electroanalysis, 27, no. 12 (2015):2829-2837,
https://doi.org/10.1002/elan.201500315 . .

TY  - DATA
AU  - Samphao, Anchalee
AU  - Kunpatee, Kanjana
AU  - Prayoonpokarach, Sanchai
AU  - Wittayakun, Jatuporn
AU  - Šovrc, Ľubomír
AU  - Stanković, Dalibor
AU  - Zagar, Kristina
AU  - Ceh, Miran
AU  - Kalcher, Kurt
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3331
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Electroanalysis
T1  - Supplementary data for the article: Samphao, A.; Kunpatee, K.; Prayoonpokarach, S.; Wittayakun, J.; Švorc, L.; Stankovic, D. M.; Zagar, K.; Ceh, M.; Kalcher, K. An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles. Electroanalysis 2015, 27 (12), 2829–2837. https://doi.org/10.1002/elan.201500315
UR  - https://hdl.handle.net/21.15107/rcub_cherry_3331
ER  - 

@misc{
author = "Samphao, Anchalee and Kunpatee, Kanjana and Prayoonpokarach, Sanchai and Wittayakun, Jatuporn and Šovrc, Ľubomír and Stanković, Dalibor and Zagar, Kristina and Ceh, Miran and Kalcher, Kurt",
year = "2015",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Electroanalysis",
title = "Supplementary data for the article: Samphao, A.; Kunpatee, K.; Prayoonpokarach, S.; Wittayakun, J.; Švorc, L.; Stankovic, D. M.; Zagar, K.; Ceh, M.; Kalcher, K. An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles. Electroanalysis 2015, 27 (12), 2829–2837. https://doi.org/10.1002/elan.201500315",
url = "https://hdl.handle.net/21.15107/rcub_cherry_3331"
}

Samphao, A., Kunpatee, K., Prayoonpokarach, S., Wittayakun, J., Šovrc, Ľ., Stanković, D., Zagar, K., Ceh, M.,& Kalcher, K.. (2015). Supplementary data for the article: Samphao, A.; Kunpatee, K.; Prayoonpokarach, S.; Wittayakun, J.; Švorc, L.; Stankovic, D. M.; Zagar, K.; Ceh, M.; Kalcher, K. An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles. Electroanalysis 2015, 27 (12), 2829–2837. https://doi.org/10.1002/elan.201500315. in Electroanalysis
Wiley-V C H Verlag Gmbh, Weinheim..
https://hdl.handle.net/21.15107/rcub_cherry_3331

Samphao A, Kunpatee K, Prayoonpokarach S, Wittayakun J, Šovrc Ľ, Stanković D, Zagar K, Ceh M, Kalcher K. Supplementary data for the article: Samphao, A.; Kunpatee, K.; Prayoonpokarach, S.; Wittayakun, J.; Švorc, L.; Stankovic, D. M.; Zagar, K.; Ceh, M.; Kalcher, K. An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles. Electroanalysis 2015, 27 (12), 2829–2837. https://doi.org/10.1002/elan.201500315. in Electroanalysis. 2015;.
https://hdl.handle.net/21.15107/rcub_cherry_3331 .

Samphao, Anchalee, Kunpatee, Kanjana, Prayoonpokarach, Sanchai, Wittayakun, Jatuporn, Šovrc, Ľubomír, Stanković, Dalibor, Zagar, Kristina, Ceh, Miran, Kalcher, Kurt, "Supplementary data for the article: Samphao, A.; Kunpatee, K.; Prayoonpokarach, S.; Wittayakun, J.; Švorc, L.; Stankovic, D. M.; Zagar, K.; Ceh, M.; Kalcher, K. An Ethanol Biosensor Based on Simple Immobilization of Alcohol Dehydrogenase on Fe3O4"Au Nanoparticles. Electroanalysis 2015, 27 (12), 2829–2837. https://doi.org/10.1002/elan.201500315" in Electroanalysis (2015),
https://hdl.handle.net/21.15107/rcub_cherry_3331 .