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Kestir SM, Şahin Keskin S, Ergüder Ö, Ük N, Türker Y, Nar I, Trabzon L, Ünlü C. Ultraprecise control over photophysical properties of novel amino acid functionalized CdTeS quantum dots and their effect on emission of yellow-emissive carbon dots. Dalton Trans 2023; 52:5704-5714. [PMID: 37021878 DOI: 10.1039/d3dt00019b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Cadmium based quantum dots (QDs) are amongst the most studied nanomaterials due to their excellent photophysical properties which can be controlled by controlling size and/or composition of the nanocrystal. However,...
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Affiliation(s)
- Sacide Melek Kestir
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey.
| | - Sultan Şahin Keskin
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey.
- Istanbul Technical University Nanotechnology Research and Application Center (ITUNano), Istanbul, Turkey
- MEMS Research Center, Istanbul Technical University, Istanbul, Turkey
| | - Özge Ergüder
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey.
| | - Nida Ük
- Istanbul Technical University Nanotechnology Research and Application Center (ITUNano), Istanbul, Turkey
- Istanbul Technical University, Polymer Science and Technology, Maslak, 34469 Istanbul, Turkey
| | - Yurdanur Türker
- Sabanci University Nanotechnology Research & Application Center (SUNUM), Sabanci University, Istanbul, Turkey
| | - Ilgın Nar
- Istanbul Technical University Nanotechnology Research and Application Center (ITUNano), Istanbul, Turkey
| | - Levent Trabzon
- MEMS Research Center, Istanbul Technical University, Istanbul, Turkey
- Faculty of Mechanical Engineering, Istanbul Technical University, Istanbul, Turkey
| | - Caner Ünlü
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey.
- Istanbul Technical University Nanotechnology Research and Application Center (ITUNano), Istanbul, Turkey
- Istanbul Technical University, Polymer Science and Technology, Maslak, 34469 Istanbul, Turkey
- Istanbul Technical University, Faculty of Science and Letters, Department of Chemistry, Maslak, Istanbul, 34469, Turkey
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Kahya N, Kestir SM, Öztürk S, Yolaç A, Torlak E, Kalaycıoğlu Z, Akın-Evingür G, Erim FB. Antioxidant and antimicrobial chitosan films enriched with aqueous sage and rosemary extracts as food coating materials: Characterization of the films and detection of rosmarinic acid release. Int J Biol Macromol 2022; 217:470-480. [PMID: 35835308 DOI: 10.1016/j.ijbiomac.2022.07.073] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/06/2022] [Accepted: 07/09/2022] [Indexed: 11/23/2022]
Abstract
Chitosan films containing aqueous extracts of sage and rosemary were prepared as a potential food coating material with antioxidant and antibacterial properties. The effect of adding extracts at different concentrations on the mechanical, physical, and optical properties of the films was investigated. The addition of the extracts significantly increased Young's modulus values of the films compared to the chitosan film, and a significant decrease was observed in the swelling percentage and water vapor permeability of the films. Since all the prepared films were ionically cross-linked, the increase in water solubility of the films with the addition of the extract was at a low level. The release of rosmarinic acid, which is found in significant amounts in both plants, from the films was monitored by the capillary electrophoresis. The antioxidant properties imparted to the films by the addition of plant extracts were determined by DPPH and FRAP methods. The addition of plant extracts increased the antimicrobial property of chitosan films against Staphylococcus aureus and Escherichia coli. Films containing sage and rosemary extracts showed potential for use as food coating materials.
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Affiliation(s)
- Nilay Kahya
- Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey
| | - Sacide Melek Kestir
- Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey
| | - Seray Öztürk
- Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey
| | - Alara Yolaç
- Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey
| | - Emrah Torlak
- Necmettin Erbakan University, Department of Molecular Biology and Genetics, Konya, Turkey
| | - Zeynep Kalaycıoğlu
- Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey
| | - Gülşen Akın-Evingür
- Piri Reis University, Department of Industrial Engineering, Tuzla, Istanbul, Turkey
| | - F Bedia Erim
- Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey.
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Ünlü C, Budak E, Kestir SM. Altering natural photosynthesis through quantum dots: effect of quantum dots on viability, light harvesting capacity and growth of photosynthetic organisms. Funct Plant Biol 2022; 49:444-451. [PMID: 35184797 DOI: 10.1071/fp21136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Quantum dots are versatile fluorescent semiconductor nanocrystals with unique photophysical properties. They have been used in various research fields of biotechnology effectively for almost three decades including cell imaging, protein tracking, energy transfer, etc. With their great potential as energy donors or acceptors, quantum dots have also been used in many studies about altering growth rate and photosynthetic activity of photosynthetic organisms by manipulating their light harvesting capacity. In this review, effect of quantum dots on growth rate of photosynthetic organisms and light harvesting capacity of photosynthetic organisms were discussed in details together with toxic effects of cadmium-based and carbon-based quantum dots on photosynthetic organisms. In short, as one of the promising materials of nanotechnology, quantum dots have become one of the essential research topics in photosynthesis research area and will help researchers to manipulate natural photosynthesis in future.
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Affiliation(s)
- Caner Ünlü
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey; and Istanbul Technical University, Faculty of Science and Letters, Department of Chemistry, Maslak, 34469 Istanbul, Turkey; and Istanbul Technical University Nanotechnology Research and Application Centre (ITUNano), Istanbul, Turkey
| | - Esranur Budak
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey
| | - Sacide Melek Kestir
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey
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