Knežević, Sara

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  • Knežević, Sara (2)
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Author's Bibliography

TiO2/APTES cross-linked to carboxylic graphene based impedimetric glucose biosensor

Ognjanović, Miloš; Stanković, Vesna; Knežević, Sara; Antić, Bratislav; Vranješ-Đurić, Sanja; Stanković, Dalibor M.

(2020)

TY  - JOUR
AU  - Ognjanović, Miloš
AU  - Stanković, Vesna
AU  - Knežević, Sara
AU  - Antić, Bratislav
AU  - Vranješ-Đurić, Sanja
AU  - Stanković, Dalibor M.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9040
AB  - Herein, we proposed a novel approach and state-of-the-art technology for the improvement of the materials and enzyme immobilization at the electrode surface and construction of impedimetric glucose biosensor. We silanized titanium dioxide nanoparticles using (3-aminopropyl)triethoxysilane (APTES), for the preparation of cross-linked material nanoparticles, with carboxylic graphene. The silanization of titanium dioxide nanoparticles and an increase in electron shuttle was proven feasible when this composite was able to achieve about 30% higher current than non-silanized material. The proposed approach was used for the modification of the printed three-electrode system and the development of the impedimetric glucose biosensor. The material morphology and electrochemical characteristics were confirmed by spectroscopic and electrochemical methods. The present combination effectively modified the electrode surface and serve as a promising basis for the construction of Point-of-Care devices. Developed biosensor possesses wide operating linear range toward glucose detection from 50 µmol to 1000 µmol, with the limit of detection of 24 µmol. Finally, negligible interference effect and application in the real sample indicate that the proposed mechanism can be successfully applied to the assessment of glucose level in only one drop of real sample.
T2  - Microchemical Journal
T1  - TiO2/APTES cross-linked to carboxylic graphene based impedimetric glucose biosensor
VL  - 158
SP  - 105150
DO  - 10.1016/j.microc.2020.105150
ER  - 
@article{
author = "Ognjanović, Miloš and Stanković, Vesna and Knežević, Sara and Antić, Bratislav and Vranješ-Đurić, Sanja and Stanković, Dalibor M.",
year = "2020",
abstract = "Herein, we proposed a novel approach and state-of-the-art technology for the improvement of the materials and enzyme immobilization at the electrode surface and construction of impedimetric glucose biosensor. We silanized titanium dioxide nanoparticles using (3-aminopropyl)triethoxysilane (APTES), for the preparation of cross-linked material nanoparticles, with carboxylic graphene. The silanization of titanium dioxide nanoparticles and an increase in electron shuttle was proven feasible when this composite was able to achieve about 30% higher current than non-silanized material. The proposed approach was used for the modification of the printed three-electrode system and the development of the impedimetric glucose biosensor. The material morphology and electrochemical characteristics were confirmed by spectroscopic and electrochemical methods. The present combination effectively modified the electrode surface and serve as a promising basis for the construction of Point-of-Care devices. Developed biosensor possesses wide operating linear range toward glucose detection from 50 µmol to 1000 µmol, with the limit of detection of 24 µmol. Finally, negligible interference effect and application in the real sample indicate that the proposed mechanism can be successfully applied to the assessment of glucose level in only one drop of real sample.",
journal = "Microchemical Journal",
title = "TiO2/APTES cross-linked to carboxylic graphene based impedimetric glucose biosensor",
volume = "158",
pages = "105150",
doi = "10.1016/j.microc.2020.105150"
}
Ognjanović, M., Stanković, V., Knežević, S., Antić, B., Vranješ-Đurić, S.,& Stanković, D. M.. (2020). TiO2/APTES cross-linked to carboxylic graphene based impedimetric glucose biosensor. in Microchemical Journal, 158, 105150.
https://doi.org/10.1016/j.microc.2020.105150
Ognjanović M, Stanković V, Knežević S, Antić B, Vranješ-Đurić S, Stanković DM. TiO2/APTES cross-linked to carboxylic graphene based impedimetric glucose biosensor. in Microchemical Journal. 2020;158:105150.
doi:10.1016/j.microc.2020.105150 .
Ognjanović, Miloš, Stanković, Vesna, Knežević, Sara, Antić, Bratislav, Vranješ-Đurić, Sanja, Stanković, Dalibor M., "TiO2/APTES cross-linked to carboxylic graphene based impedimetric glucose biosensor" in Microchemical Journal, 158 (2020):105150,
https://doi.org/10.1016/j.microc.2020.105150 . .
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A single drop histamine sensor based on AuNPs/MnO2 modified screen-printed electrode

Knežević, Sara; Ognjanović, Miloš; Nedić, Nemanja; Mariano, Jose F. M. L.; Milanović, Zorana; Petković, Branka B.; Antić, Bratislav; Vranješ-Đurić, Sanja; Stanković, Dalibor M.

(2020)

TY  - JOUR
AU  - Knežević, Sara
AU  - Ognjanović, Miloš
AU  - Nedić, Nemanja
AU  - Mariano, Jose F. M. L.
AU  - Milanović, Zorana
AU  - Petković, Branka B.
AU  - Antić, Bratislav
AU  - Vranješ-Đurić, Sanja
AU  - Stanković, Dalibor M.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8834
AB  - In order to ensure high food quality, one of the prime importance is the detection and quantification of histamine, well known marine food poison. In this work, we constructed novel electrochemical biosensor for the detection of histamine based on gold nanoparticles decorated on manganese dioxide (Au/MnO2) and used for modification of screen-printed carbon electrode (Au/MnO2@SPCE). The constructed sensor was then used for the estimation of histamine content in a single drop. Materials used in this study were synthesized and characterized using HR-TEM, XRPD and electrochemical methods. The amperometric detection method was optimized and, under selected operating parameters (supporting electrolyte pH 6, working potential of 1 V), the proposed sensor possesses linear working range from 0.3 µM to 5.1 µM, with a detection limit of 0.08 µM. The effect of selected interferences was investigated and it was found that the developed approach offers accurate, precise, selective, fast and reproducible quantification of histamine using only one drop of the sample. In the end, this work stands as a proof-of-concept of the modified electrodes and electrochemical detection as a promising and prospective approach for the applications in real-time monitoring of the food quality.
T2  - Microchemical Journal
T1  - A single drop histamine sensor based on AuNPs/MnO2 modified screen-printed electrode
VL  - 155
SP  - 104778
DO  - 10.1016/j.microc.2020.104778
ER  - 
@article{
author = "Knežević, Sara and Ognjanović, Miloš and Nedić, Nemanja and Mariano, Jose F. M. L. and Milanović, Zorana and Petković, Branka B. and Antić, Bratislav and Vranješ-Đurić, Sanja and Stanković, Dalibor M.",
year = "2020",
abstract = "In order to ensure high food quality, one of the prime importance is the detection and quantification of histamine, well known marine food poison. In this work, we constructed novel electrochemical biosensor for the detection of histamine based on gold nanoparticles decorated on manganese dioxide (Au/MnO2) and used for modification of screen-printed carbon electrode (Au/MnO2@SPCE). The constructed sensor was then used for the estimation of histamine content in a single drop. Materials used in this study were synthesized and characterized using HR-TEM, XRPD and electrochemical methods. The amperometric detection method was optimized and, under selected operating parameters (supporting electrolyte pH 6, working potential of 1 V), the proposed sensor possesses linear working range from 0.3 µM to 5.1 µM, with a detection limit of 0.08 µM. The effect of selected interferences was investigated and it was found that the developed approach offers accurate, precise, selective, fast and reproducible quantification of histamine using only one drop of the sample. In the end, this work stands as a proof-of-concept of the modified electrodes and electrochemical detection as a promising and prospective approach for the applications in real-time monitoring of the food quality.",
journal = "Microchemical Journal",
title = "A single drop histamine sensor based on AuNPs/MnO2 modified screen-printed electrode",
volume = "155",
pages = "104778",
doi = "10.1016/j.microc.2020.104778"
}
Knežević, S., Ognjanović, M., Nedić, N., Mariano, J. F. M. L., Milanović, Z., Petković, B. B., Antić, B., Vranješ-Đurić, S.,& Stanković, D. M.. (2020). A single drop histamine sensor based on AuNPs/MnO2 modified screen-printed electrode. in Microchemical Journal, 155, 104778.
https://doi.org/10.1016/j.microc.2020.104778
Knežević S, Ognjanović M, Nedić N, Mariano JFML, Milanović Z, Petković BB, Antić B, Vranješ-Đurić S, Stanković DM. A single drop histamine sensor based on AuNPs/MnO2 modified screen-printed electrode. in Microchemical Journal. 2020;155:104778.
doi:10.1016/j.microc.2020.104778 .
Knežević, Sara, Ognjanović, Miloš, Nedić, Nemanja, Mariano, Jose F. M. L., Milanović, Zorana, Petković, Branka B., Antić, Bratislav, Vranješ-Đurić, Sanja, Stanković, Dalibor M., "A single drop histamine sensor based on AuNPs/MnO2 modified screen-printed electrode" in Microchemical Journal, 155 (2020):104778,
https://doi.org/10.1016/j.microc.2020.104778 . .
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