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Ostovari F, Dehghani Z. Influence of aminated graphene nanosheets on electro–optical performance and nonlinear optical properties of nematic liquid crystal. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Synthesis and Characterization of Graphite Intercalation Compounds with Sulfuric Acid. CRYSTALS 2022. [DOI: 10.3390/cryst12030421] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
In this work, graphite intercalation compounds (GICs) were synthesized using three different oxidizers: (NH4)2S2O8, K2S2O8, and CrO3 with and without P2O5 as a water-binding agent. Furthermore, the samples obtained were heat-treated at 800 °C. Specimens were characterized by optical microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and scanning electron microscopy (SEM). The correlation between different characteristic parameters of the Raman analysis has shown that the use of CrO3 results in a much higher structural disorder compared to the products obtained using persulfate oxidizers. Narrowing the correlation set revealed that minimal defect concentration can be reached by using K2S2O8, while the use of (NH4)2S2O8 causes a slightly higher concentration of defects. It was also established that the additional use of P2O5 can help to achieve more effective intercalation and has a positive effect on the formation of the stage I GIC phase. After heat treatment, the intercalated products mostly return to a graphite-like structure; however, the samples obtained with CrO3 stand out with the most significant changes in their surface morphology. Therefore, analysis suggests that GICs obtained using persulfate oxidizers and P2O5 could be a candidate to produce high-quality graphene or graphene oxide.
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Mahendran GB, Ramalingam SJ, Rayappan JBB, Gumpu MB, Kumar RG, Lakshmanakumar M, Nesakumar N. Amperometric Detection of Mercury Ions Using Piperazine‐Functionalized Reduced Graphene Oxide as an Efficient Sensing Platform. ChemistrySelect 2022. [DOI: 10.1002/slct.202103601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- G. Balu Mahendran
- PG and Research Department of Chemistry A.V.V.M Sri Pushpam College (Autonomous) Affiliated to Bharathidasan University Poondi, Thanjavur Tamil Nadu 613 503 India
| | - S. Jothi Ramalingam
- PG and Research Department of Chemistry A.V.V.M Sri Pushpam College (Autonomous) Affiliated to Bharathidasan University Poondi, Thanjavur Tamil Nadu 613 503 India
| | - John Bosco Balaguru Rayappan
- School of Electrical & Electronics Engineering SASTRA Deemed to be University Thanjavur 613 401 Tamil Nadu India
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB) SASTRA Deemed to be University Thanjavur 613 401 Tamil Nadu India
| | - Manju Bhargavi Gumpu
- Department of Physics National Institute of Technology Tiruchirappalli 620 015 Tamil Nadu India
| | - Rajendran Ganesh Kumar
- PG and Research Department of Chemistry Pachaiyappa's College Chennai 600 030 Tamil Nadu India
| | - Muthaiyan Lakshmanakumar
- School of Electrical & Electronics Engineering SASTRA Deemed to be University Thanjavur 613 401 Tamil Nadu India
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB) SASTRA Deemed to be University Thanjavur 613 401 Tamil Nadu India
| | - Noel Nesakumar
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB) SASTRA Deemed to be University Thanjavur 613 401 Tamil Nadu India
- School of Chemical & Biotechnology SASTRA Deemed to be University Thanjavur 613 401 Tamil Nadu India
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Efficient synthesis of amine-functionalized graphene oxide by ultrasound-assisted reactions and density functional theory mechanistic insight. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01798-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Douda J, González-Vargas CR, Mota-Díaz II, Basiuk EV, Hernández-Contreras XA, Fuentes-García JA, Bornacelli J, Torres-Torres C. Photoluminescent properties of liposome-encapsulated amine-functionalized nanodiamonds. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/abc1c5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Abstract
In the present work, amine-functionalized nanodiamonds (NDs) have been encapsulated in liposomes and studied in order to observe the modification of their photoluminescence properties. NDs were functionalized with aromatic amines such as 1-aminopyrene and 2-aminofluorene, and the aliphatic amine 1-octadecylamine. Morphology, structural and optical properties of NDs and amine-modified NDs were analyzed by transmission electron microscopy, atomic force microscopy, scanning electron microscopy, and photoluminescence. The amine-functionalized NDs were successfully encapsulated in lecithin liposomes prepared by the green and conventional methods. The obtained results show significant changes in photoluminescent properties of functionalized NDs, and were more potentialized after liposome encapsulation. Our findings could be applied in the development of new kinds of water-dispersible fluorescent hybrids, liposome-NDs, with the capability of drug encapsulation for use in diagnostics and therapy (theragnostic liposomes). All-optical sensors with possibilities for tailoring their response for other biomedical applications can be also contemplated.
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Rakhshanipour M, Eshghi H, Bakavoli M. New functionalization of graphene oxide with N
2
O
2
ligand for efficient loading of Cu nanostructures as a heterogeneous nanocatalyst for the synthesis of β‐hydroxy‐1,2,3‐triazoles. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5426] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Mansoureh Rakhshanipour
- Department of Chemistry, Faculty of ScienceFerdowsi University of Mashhad Mashhad 9177948974 Iran
| | - Hossein Eshghi
- Department of Chemistry, Faculty of ScienceFerdowsi University of Mashhad Mashhad 9177948974 Iran
| | - Mehdi Bakavoli
- Department of Chemistry, Faculty of ScienceFerdowsi University of Mashhad Mashhad 9177948974 Iran
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