Quantifying the Mechanical Anisotropy in Poly(3-hexylthiophene) Nanofibers
Correlating the structure with nanomechanical property of semicrystalline conjugated-polymer crystal is of essential importance for the performance improvement and design of flexible electronic devices. Although it is well-known that the semicrystalline conjugated-polymer crystal exhibits anisotropi...
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| Published in | ACS macro letters Vol. 9; no. 1; pp. 108 - 114 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
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United States
American Chemical Society
21.01.2020
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| Abstract | Correlating the structure with nanomechanical property of semicrystalline conjugated-polymer crystal is of essential importance for the performance improvement and design of flexible electronic devices. Although it is well-known that the semicrystalline conjugated-polymer crystal exhibits anisotropic structure owing to the π–π and layer stacking of highly coplanar conjugated backbones, the structure–nanomechanical property relationship is missing. Here, we investigated the axial mechanical anisotropy of the P3HT nanofiber by using thermal shape-fluctuation analysis and a three-point bending test based on atomic force microscopy. Our results show that Young’s modulus in the layer-stacking direction (E L) is 1–2 orders of magnitude greater than that in the π-conjugated backbone direction (E B). We attribute this mechanical anisotropy to the π-stacking of the P3HT backbone, but the layer stacking will decrease E L, which weakens the mechanical anisotropy. Moreover, we demonstrated that the P3HT nanofiber shows a loading-rate-independent Young’s modulus and deformation-dependent resilience in the layer-stacking direction. |
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| AbstractList | Correlating the structure with nanomechanical property of semicrystalline conjugated-polymer crystal is of essential importance for the performance improvement and design of flexible electronic devices. Although it is well-known that the semicrystalline conjugated-polymer crystal exhibits anisotropic structure owing to the π-π and layer stacking of highly coplanar conjugated backbones, the structure-nanomechanical property relationship is missing. Here, we investigated the axial mechanical anisotropy of the P3HT nanofiber by using thermal shape-fluctuation analysis and a three-point bending test based on atomic force microscopy. Our results show that Young's modulus in the layer-stacking direction (
) is 1-2 orders of magnitude greater than that in the π-conjugated backbone direction (
). We attribute this mechanical anisotropy to the π-stacking of the P3HT backbone, but the layer stacking will decrease
, which weakens the mechanical anisotropy. Moreover, we demonstrated that the P3HT nanofiber shows a loading-rate-independent Young's modulus and deformation-dependent resilience in the layer-stacking direction. Correlating the structure with nanomechanical property of semicrystalline conjugated-polymer crystal is of essential importance for the performance improvement and design of flexible electronic devices. Although it is well-known that the semicrystalline conjugated-polymer crystal exhibits anisotropic structure owing to the π–π and layer stacking of highly coplanar conjugated backbones, the structure–nanomechanical property relationship is missing. Here, we investigated the axial mechanical anisotropy of the P3HT nanofiber by using thermal shape-fluctuation analysis and a three-point bending test based on atomic force microscopy. Our results show that Young’s modulus in the layer-stacking direction (E L) is 1–2 orders of magnitude greater than that in the π-conjugated backbone direction (E B). We attribute this mechanical anisotropy to the π-stacking of the P3HT backbone, but the layer stacking will decrease E L, which weakens the mechanical anisotropy. Moreover, we demonstrated that the P3HT nanofiber shows a loading-rate-independent Young’s modulus and deformation-dependent resilience in the layer-stacking direction. |
| Author | Zhang, Wenke Ma, Ziwen Yang, Peng Xu, Daren Jiang, Ke Song, Yu |
| AuthorAffiliation | Jilin University State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry Institute of Theoretical Chemistry, College of Chemistry |
| AuthorAffiliation_xml | – name: Institute of Theoretical Chemistry, College of Chemistry – name: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry – name: Jilin University |
| Author_xml | – sequence: 1 givenname: Ke surname: Jiang fullname: Jiang, Ke organization: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry – sequence: 2 givenname: Daren surname: Xu fullname: Xu, Daren organization: Jilin University – sequence: 3 givenname: Ziwen surname: Ma fullname: Ma, Ziwen organization: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry – sequence: 4 givenname: Peng surname: Yang fullname: Yang, Peng organization: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry – sequence: 5 givenname: Yu surname: Song fullname: Song, Yu email: songyu16@jlu.edu.cn organization: Jilin University – sequence: 6 givenname: Wenke orcidid: 0000-0002-4569-6035 surname: Zhang fullname: Zhang, Wenke email: zhangwk@jlu.edu.cn organization: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/35638666$$D View this record in MEDLINE/PubMed |
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| CitedBy_id | crossref_primary_10_1021_acs_jpcc_3c07895 crossref_primary_10_1021_acs_macromol_3c02552 crossref_primary_10_1002_marc_202300437 crossref_primary_10_1021_acs_macromol_0c01975 |
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| Title | Quantifying the Mechanical Anisotropy in Poly(3-hexylthiophene) Nanofibers |
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