One-step formation of three-dimensional interconnected T-shaped microstructures inside composites by orthogonal bidirectional self-assembly method
ABSTRACTThe fillers inside a polymer matrix should typically be self-assembled in both the horizontal and vertical directions to obtain 3-dimentional (3D) percolation pathways, whereby the fields of application can be expanded and the properties of organic-inorganic composite films improved. Convent...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2024-12-01
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| Series: | Science and Technology of Advanced Materials |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/14686996.2024.2313957 |
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| author | Zhiming Shen Hiroyuki Saito Wataru Mita Takeshi Fujihara Hong-Baek Cho Tadachika Nakayama |
| author_facet | Zhiming Shen Hiroyuki Saito Wataru Mita Takeshi Fujihara Hong-Baek Cho Tadachika Nakayama |
| author_sort | Zhiming Shen |
| collection | DOAJ |
| description | ABSTRACTThe fillers inside a polymer matrix should typically be self-assembled in both the horizontal and vertical directions to obtain 3-dimentional (3D) percolation pathways, whereby the fields of application can be expanded and the properties of organic-inorganic composite films improved. Conventional dielectrophoresis techniques can typically only drive fillers to self-assemble in only one direction. We have devised a one-step dielectrophoresis-driven approach that effectively induces fillers self-assembly along two orthogonal axes, which results in the formation of 3D interconnected T-shaped iron microstructures (3D-T CIP) inside a polymer matrix. This approach to carbonyl iron powder (CIP) embedded in a polymer matrix results in a linear structure along the thickness direction and a network structure on the top surface of the film. The fillers in the polymer were controlled to achieve orthogonal bidirectional self-assembly using an external alternating current (AC) electric field and a non-contact technique that did not lead to electrical breakdown. The process of 3D-T CIP formation was observed in real time using in situ observation methods with optical microscopy, and the quantity and quality of self-assembly were characterized using statistical and fractal analysis. The process of fillers self-assembly along the direction perpendicular to the electric field was explained by finite element analogue simulations, and the results indicated that the insulating polyethylene terephthalate (PET) film between the electrode and the CIP/prepolymer suspension was the key to the formation of the 3D-T CIP. In contrast to the traditional two-step method of fabricating sandwich-structured film, the fabricated 3D-T CIP film with 3D electrically conductive pathways can be applied as magnetic field sensor. |
| first_indexed | 2024-03-07T16:17:33Z |
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| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-03-07T16:17:33Z |
| publishDate | 2024-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-1c18719f14f643e3ac2a59c09bbdb3382024-03-04T09:48:16ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142024-12-0125110.1080/14686996.2024.2313957One-step formation of three-dimensional interconnected T-shaped microstructures inside composites by orthogonal bidirectional self-assembly methodZhiming Shen0Hiroyuki Saito1Wataru Mita2Takeshi Fujihara3Hong-Baek Cho4Tadachika Nakayama5Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka, Niigata, JapanExtreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka, Niigata, JapanExtreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka, Niigata, JapanNational Institute of Technology, Anan College, Anan, Tokushima, JapanDepartment of Materials Science & Chemical Engineering, Hanyang University ERICA, Ansan, Republic of KoreaExtreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka, Niigata, JapanABSTRACTThe fillers inside a polymer matrix should typically be self-assembled in both the horizontal and vertical directions to obtain 3-dimentional (3D) percolation pathways, whereby the fields of application can be expanded and the properties of organic-inorganic composite films improved. Conventional dielectrophoresis techniques can typically only drive fillers to self-assemble in only one direction. We have devised a one-step dielectrophoresis-driven approach that effectively induces fillers self-assembly along two orthogonal axes, which results in the formation of 3D interconnected T-shaped iron microstructures (3D-T CIP) inside a polymer matrix. This approach to carbonyl iron powder (CIP) embedded in a polymer matrix results in a linear structure along the thickness direction and a network structure on the top surface of the film. The fillers in the polymer were controlled to achieve orthogonal bidirectional self-assembly using an external alternating current (AC) electric field and a non-contact technique that did not lead to electrical breakdown. The process of 3D-T CIP formation was observed in real time using in situ observation methods with optical microscopy, and the quantity and quality of self-assembly were characterized using statistical and fractal analysis. The process of fillers self-assembly along the direction perpendicular to the electric field was explained by finite element analogue simulations, and the results indicated that the insulating polyethylene terephthalate (PET) film between the electrode and the CIP/prepolymer suspension was the key to the formation of the 3D-T CIP. In contrast to the traditional two-step method of fabricating sandwich-structured film, the fabricated 3D-T CIP film with 3D electrically conductive pathways can be applied as magnetic field sensor.https://www.tandfonline.com/doi/10.1080/14686996.2024.2313957T-shaped structureself-assemblydielectrophoresisfractal analysis |
| spellingShingle | Zhiming Shen Hiroyuki Saito Wataru Mita Takeshi Fujihara Hong-Baek Cho Tadachika Nakayama One-step formation of three-dimensional interconnected T-shaped microstructures inside composites by orthogonal bidirectional self-assembly method Science and Technology of Advanced Materials T-shaped structure self-assembly dielectrophoresis fractal analysis |
| title | One-step formation of three-dimensional interconnected T-shaped microstructures inside composites by orthogonal bidirectional self-assembly method |
| title_full | One-step formation of three-dimensional interconnected T-shaped microstructures inside composites by orthogonal bidirectional self-assembly method |
| title_fullStr | One-step formation of three-dimensional interconnected T-shaped microstructures inside composites by orthogonal bidirectional self-assembly method |
| title_full_unstemmed | One-step formation of three-dimensional interconnected T-shaped microstructures inside composites by orthogonal bidirectional self-assembly method |
| title_short | One-step formation of three-dimensional interconnected T-shaped microstructures inside composites by orthogonal bidirectional self-assembly method |
| title_sort | one step formation of three dimensional interconnected t shaped microstructures inside composites by orthogonal bidirectional self assembly method |
| topic | T-shaped structure self-assembly dielectrophoresis fractal analysis |
| url | https://www.tandfonline.com/doi/10.1080/14686996.2024.2313957 |
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