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Duc Van N, Manh Ha N, Van Dung N, Thi Huyen Ngoc H, Van Truong P. Biosynthesis of plasmonic Ag/Bi2O2CO3 nanocomposites from Acacia hybrid leaf extract with enhanced photocatalytic activity. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Khuyen HT, Huong TT, Van ND, Huong NT, Vu N, Lien PT, Nam PH, Nghia VX. Synthesis of Multifunctional Eu(III) Complex Doped Fe 3O 4/Au Nanocomposite for Dual Photo-Magnetic Hyperthermia and Fluorescence Bioimaging. Molecules 2023; 28:molecules28020749. [PMID: 36677807 PMCID: PMC9865881 DOI: 10.3390/molecules28020749] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/15/2023]
Abstract
In this paper, the luminescent complex Eu(3-thenoyltrifluoroacetonate)3 was integrated with Fe3O4 and gold (Au) nanoparticles to form a multifunctional nanocomposite, Fe3O4/Au/Eu(TTA)3 (FOASET NC), for dual magnetic-photothermal therapy and biomedical imaging. Upon functionalization with amine-NH2, the FOASET NC exhibits a small size of 60-70 nm and strong, sharp emission at λmax = 614 nm, enhanced by surface plasmon resonance (SPR) of Au nanoparticles that provided an effective label for HT29 colorectal cancer cells by fluorescence microscopy imaging. In addition, a hyperthermia temperature (42-46 °C) was completely achieved by using these FOASET NCs in an aqueous solution with three heating modes for (i) Magnetic therapy (MT), (ii) Photothermal therapy (PT), and (iii) Dual magnetic-photothermal therapy (MPT). The heating efficiency was improved in the dual magnetic-photothermal heating mode.
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Affiliation(s)
- Hoang Thi Khuyen
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Department of Materials Science and Energy, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Correspondence: or ; Tel.: +84-4-973756768
| | - Tran Thu Huong
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Department of Materials Science and Energy, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Nguyen Duc Van
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Nguyen Thanh Huong
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Department of Materials Science and Energy, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Nguyen Vu
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Pham Thi Lien
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Pham Hong Nam
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Vu Xuan Nghia
- 108 Military Central Hospital, 01 Tran Hung Dao, Hai Ba Trung, Hanoi 100000, Vietnam
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Cui J, Duc Van N, Zhang F, Hama Y. Evaluation of Applicability of Minimum Required Compressive Strength for Cold Weather Concreting Based on Winter Meteorological Factors. Materials (Basel) 2022; 15:8490. [PMID: 36499987 PMCID: PMC9741463 DOI: 10.3390/ma15238490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/16/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
In this paper, we evaluated the applicability of the minimum required compressive strength for cold weather concreting based on winter meteorological factors. In this study, a compressive strength test, dynamic elastic modulus test, hydration degree test, underwater weighing test, and freeze-thaw test were performed to investigate the effect of compressive strength development at early ages on frost resistance of concrete. In particular, the ASTM equivalent number of cycles (CyASTM-sp) of various locations was estimated based on winter meteorological factors. The results of experiments showed that the frost resistance of concrete at early ages increases with increased compressive strength. The relative dynamic modulus of elasticity of concrete of 5.0 MPa showed that it can be maintained above 90% within 18 freeze-thaw cycles. In addition, the CyASTM-sp results showed that a compressive strength of 5.0 MPa can protect concrete from early age frost damage in all investigated locations, indicating that a compressive strength of 5.0 MPa is the minimum required for safe and reliable cold weather concreting. However, for concrete structures subjected to repeated freeze-thaw cycles, it is necessary to select a higher compressive strength value according to the construction condition.
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Affiliation(s)
- Jiahui Cui
- Division of Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan
| | - Nguyen Duc Van
- College of Environmental Technology, Muroran Institute of Technology, Muroran 050-8585, Japan
| | - Feng Zhang
- Division of Sustainable and Environmental Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan
| | - Yukio Hama
- College of Environmental Technology, Muroran Institute of Technology, Muroran 050-8585, Japan
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Duc Van N, Kuroiwa E, Kim J, Choi H, Hama Y. Influence of Restrained Condition on Mechanical Properties, Frost Resistance, and Carbonation Resistance of Expansive Concrete. Materials (Basel) 2020; 13:ma13092136. [PMID: 32380711 PMCID: PMC7254230 DOI: 10.3390/ma13092136] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 04/29/2020] [Accepted: 05/04/2020] [Indexed: 12/02/2022]
Abstract
This paper presents the results of an experimental investigation of the effect of the restrained condition on the mechanical properties, frost resistance, and carbonation resistance of expansive concrete with different water–binder ratios. In this study, length change ratio test, expansion strain test, compressive strength test, mercury intrusion porosimetry test, underwater weighing test, freezing–thawing test, and accelerated carbonation test were performed to evaluate the mechanical properties, pore size distribution, total porosity, and durability of expansive concrete under both restrained and unrestrained conditions. The test results indicate that the length change ratio and expansion strain of the expansive concrete were controlled by the restrained condition. The compressive strength of expansive concrete was enhanced by the triaxial restraining when the amount of expansive additive was 40 kg/m3 of concrete. Two hypotheses were described to explain the change of pore structure change expansive mortar. The results also indicate that the carbonation resistance and frost resistance were improved by the uniaxial restrained condition. Furthermore, the effect of the restrained condition must be considered to evaluate not only the experimental results of the expansive concrete with a high EX replacement level but also the expansive concrete combining other cement replacement materials.
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Affiliation(s)
- Nguyen Duc Van
- Division of Engineering, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan;
| | - Emika Kuroiwa
- Course of Architecture and Building Engineering, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan;
| | - Jihoon Kim
- College of Environmental Technology, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan;
| | - Hyeonggil Choi
- School of Architecture, Kyungpook National University, Daegu 41566, Korea
- Correspondence: (H.C.); (Y.H.)
| | - Yukio Hama
- College of Environmental Technology, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan;
- Correspondence: (H.C.); (Y.H.)
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Huong NT, Van ND, Tien DM, Tung DK, Binh NT, Anh TK, Minh LQ. Structural and luminescent properties of (Eu,Tb)PO4·H2O nanorods/nanowires prepared by microwave technique. J RARE EARTH 2011. [DOI: 10.1016/s1002-0721(10)60619-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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