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454 results on '"Atar, Necip"'

13. Thiram Determination in Milk Samples by Surface Plasmon Resonance Based on Molecularly Imprinted Polymers and Sulphur-Doped Titanium Dioxide.

Author

Harmankaya, Sezen, Deveci, Hacı Ahmet, Harmankaya, Ahmet, Gül, Fatma Hazan, Atar, Necip, and Yola, Mehmet Lütfi

Subjects
SURFACE plasmon resonance, MOLECULAR imprinting, ETHYLENE glycol, TITANIUM dioxide, SOL-gel processes, IMPRINTED polymers
Abstract

In this work, a new surface plasmon resonance (SPR) sensor based on sulphur-doped titanium dioxide (S-TiO2) nanostructures and molecularly imprinted polymer (MIP) was presented for thiram (THI) determination in milk samples. Firstly, the S-TiO2 nanomaterial with a high product yield was prepared by using a facile sol-gel hydrolysis technique with a high product yield. After that, UV polymerization was carried out for the preparation of the THI-imprinted SPR chip based on S-TiO2 using a mixture including ethylene glycol dimethacrylate (EGDMA) as the cross-linker, N,N′-azobisisobutyronitrile (AIBN) as the initiator, and methacryloylamidoglutamicacid (MAGA) as the monomer. The reliability of the sensor preparation procedure has been successfully proven by characterization studies of the prepared nanomaterials and SPR chip surfaces through spectroscopic, microscopic, and electrochemical methods. As a result, the prepared SPR sensor showed linearity in the range of 1.0 × 10−9–1.0 × 10−7 M with a detection limit (LOD) of 3.3 × 10−10 M in the real samples, and a sensor technique for THI determination with high sensitivity, repeatability, and selectivity can be included in the literature. [ABSTRACT FROM AUTHOR]

Published
2024
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16. An amplified voltammetric sensor based on platinum nanoparticle/polyoxometalate/two-dimensional hexagonal boron nitride nanosheets composite and ionic liquid for determination of N-hydroxysuccinimide in water samples

Author

Karimi-Maleh, Hassan, Karimi, Fatemeh, Malekmohammadi, Samira, Zakariae, Nilofar, Esmaeili, Roghayeh, Rostamnia, Sadegh, Yola, Mehmet Lütfi, Atar, Necip, Movaghgharnezhad, Shirin, Rajendran, Saravanan, Razmjou, Amir, Orooji, Yasin, Agarwal, Shilpi, and Gupta, Vinod Kumar

Published
2020
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34. Fenpicoxamid-Imprinted Surface Plasmon Resonance (SPR) Sensor Based on Sulfur-Doped Graphitic Carbon Nitride and Its Application to Rice Samples.

Author

Akıcı, Şule Yıldırım, Bankoğlu Yola, Bahar, Karslıoğlu, Betül, Polat, İlknur, Atar, Necip, and Yola, Mehmet Lütfi

Subjects
SURFACE plasmon resonance, NITRIDES, ETHYLENE glycol, PREPARED foods, RICE, DETECTORS
Abstract

This research attempt involved the development and utilization of a newly designed surface plasmon resonance (SPR) sensor which incorporated sulfur-doped graphitic carbon nitride (S-g-C3N4) as the molecular imprinting material. The primary objective was to employ this sensor for the quantitative analysis of Fenpicoxamid (FEN) in rice samples. The synthesis of S-g-C3N4 with excellent purity was achieved using the thermal poly-condensation approach, which adheres to the principles of green chemistry. Afterwards, UV polymerization was utilized to fabricate a surface plasmon resonance (SPR) chip imprinted with FEN, employing S-g-C3N4 as the substrate material. This process involved the inclusion of N,N′-azobisisobutyronitrile (AIBN) as the initiator, ethylene glycol dimethacrylate (EGDMA) as the cross-linker, methacryloylamidoglutamic acid (MAGA) as the monomer, and FEN as the analyte. After successful structural analysis investigations on a surface plasmon resonance (SPR) chip utilizing S-g-C3N4, which was imprinted with FEN, a comprehensive investigation was conducted using spectroscopic, microscopic, and electrochemical techniques. Subsequently, the kinetic analysis applications, namely the determination of the limit of quantification (LOQ) and the limit of detection (LOD), were carried out. For analytical results, the linearity of the FEN-imprinted SPR chip based on S-g-C3N4 was determined as 1.0–10.0 ng L−1 FEN, and LOQ and LOD values were obtained as 1.0 ng L−1 and 0.30 ng L−1, respectively. Finally, the prepared SPR sensor's high selectivity, repeatability, reproducibility, and stability will ensure safe food consumption worldwide. [ABSTRACT FROM AUTHOR]

Published
2024
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