Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites
Epsilon-negative materials (ENMs) hold promise for the advancement of the next generation of electronic devices. Most epsilon-negative materials strongly correlate with metal properties, which limits their applications in electronic packaging. Instead, achieving a negative permittivity in the insula...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Online Access: | https://hdl.handle.net/10356/174783 |
| _version_ | 1811681726924062720 |
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| author | Wei, Zaixin Liu, Yao Zhang, Yan Aleksanteri, Kallioniemi Leevi Qi, Xiangru Zhang, Zidong Wang, Zhongyang Gao, Weibo Fan, Runhua |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Wei, Zaixin Liu, Yao Zhang, Yan Aleksanteri, Kallioniemi Leevi Qi, Xiangru Zhang, Zidong Wang, Zhongyang Gao, Weibo Fan, Runhua |
| author_sort | Wei, Zaixin |
| collection | NTU |
| description | Epsilon-negative materials (ENMs) hold promise for the advancement of the next generation of electronic devices. Most epsilon-negative materials strongly correlate with metal properties, which limits their applications in electronic packaging. Instead, achieving a negative permittivity in the insulating state is expected to show the decoupling of electrical and thermal conductivities, and experimental demonstration of this behavior is lacking. In this study, multi-walled carbon nanotubes (MWCNTs)@polydopamine (PDA)-silver/polyimide (PI) nanocomposites are engineered to achieve weakly negative permittivity, which is attributed to the localized plasma oscillations. The PDA layer and nano-Ag are exploited to confine electrons with MWCNTs for improving energy transport while perturbing directional current, thereby realizing high thermal conductivity and low electrical conductivity. This work provides insights into the fundamental nature of heat and charge transport in epsilon-negative systems. |
| first_indexed | 2024-10-01T03:45:32Z |
| format | Journal Article |
| id | ntu-10356/174783 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:45:32Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1747832024-04-15T15:37:02Z Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites Wei, Zaixin Liu, Yao Zhang, Yan Aleksanteri, Kallioniemi Leevi Qi, Xiangru Zhang, Zidong Wang, Zhongyang Gao, Weibo Fan, Runhua School of Physical and Mathematical Sciences Chemistry Nanocomposites Thermal conductivity Epsilon-negative materials (ENMs) hold promise for the advancement of the next generation of electronic devices. Most epsilon-negative materials strongly correlate with metal properties, which limits their applications in electronic packaging. Instead, achieving a negative permittivity in the insulating state is expected to show the decoupling of electrical and thermal conductivities, and experimental demonstration of this behavior is lacking. In this study, multi-walled carbon nanotubes (MWCNTs)@polydopamine (PDA)-silver/polyimide (PI) nanocomposites are engineered to achieve weakly negative permittivity, which is attributed to the localized plasma oscillations. The PDA layer and nano-Ag are exploited to confine electrons with MWCNTs for improving energy transport while perturbing directional current, thereby realizing high thermal conductivity and low electrical conductivity. This work provides insights into the fundamental nature of heat and charge transport in epsilon-negative systems. Published version The project was supported by the National Natural Science Foundation of China [grant No. 52171141, 51971119], the National Key Research and Development Program of China [grant No. 2022YFB3505104, 2022YFB3706604], the Natural Science Foundation of Shandong Province [grant No. ZR2020YQ32, ZR2022JQ19], Z.X.W. gratefully acknowledges the support from the China Scholarship Council. The authors acknowledge the support of NRF QEP support with NRF2021-QEP2-03-p10. 2024-04-11T01:13:25Z 2024-04-11T01:13:25Z 2024 Journal Article Wei, Z., Liu, Y., Zhang, Y., Aleksanteri, K. L., Qi, X., Zhang, Z., Wang, Z., Gao, W. & Fan, R. (2024). Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites. Advanced Electronic Materials, 10(4), 2300614-. https://dx.doi.org/10.1002/aelm.202300614 2199-160X https://hdl.handle.net/10356/174783 10.1002/aelm.202300614 2-s2.0-85183582789 4 10 2300614 en Advanced Electronic Materials © 2024 The Authors. Advanced Electronic Materials published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf |
| spellingShingle | Chemistry Nanocomposites Thermal conductivity Wei, Zaixin Liu, Yao Zhang, Yan Aleksanteri, Kallioniemi Leevi Qi, Xiangru Zhang, Zidong Wang, Zhongyang Gao, Weibo Fan, Runhua Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites |
| title | Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites |
| title_full | Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites |
| title_fullStr | Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites |
| title_full_unstemmed | Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites |
| title_short | Negative correlation between thermal and electrical conductivity in epsilon-negative nanocomposites |
| title_sort | negative correlation between thermal and electrical conductivity in epsilon negative nanocomposites |
| topic | Chemistry Nanocomposites Thermal conductivity |
| url | https://hdl.handle.net/10356/174783 |
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