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Publisher DOI: 10.3390/nano10061144
Title: Nanocomposites with p- and n-type conductivity controlled by type and content of nanotubes in thermosets for thermoelectric applications
Language: English
Authors: Kröning, Katharina 
Krause, Beate 
Pötschke, Petra 
Fiedler, Bodo  
Keywords: epoxy;carbon nanotubes;thermoelectric;Seebeck coefficient;power factor
Issue Date: 10-Jun-2020
Publisher: Multidisciplinary Digital Publishing Institute
Source: Nanomaterials 10 (6): 1144 (2020)
Journal: Nanomaterials 
Abstract (english): 
In this work, composites based on epoxy resin and various carbon nanotubes (CNTs) were studied regarding their thermoelectric properties. The epoxy composites were prepared by infiltration of preformed CNT buckypapers. The influence of different types of CNTs on the Seebeck coefficient was investigated, namely lab-made and commercially available multi walled carbon nanotubes (MWCNTs), lab-made nitrogen doped MWCNTs (N-MWCNT) and commercially available single walled carbon nanotubes (SWCNTs). It was found that only by varying the lab-made MWCNT content could both n- and p-type composites be produced with Seebeck coefficients between −9.5 and 3.1 µV/K. The incorporation of N-MWCNTs resulted in negative Seebeck coefficients of −11.4 to −17.4 µV/K. Thus, the Seebeck coefficient of pure SWCNT changed from 37.4 to −25.5 µV/K in the epoxy/1 wt. % SWCNT composite. A possible explanation for the shift in the Seebeck coefficient is the change of the CNTs Fermi level depending on the number of epoxy molecules on the CNT surface.
DOI: 10.15480/882.2819
ISSN: 2079-4991
Institute: Kunststoffe und Verbundwerkstoffe M-11 
Document Type: Article
Project: Publikationsfonds 2020 
More Funding information: Landesforschungsförderung Hamburg (LEF-FV)
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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