Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices
Disordered carbon materials, both amorphous and with long-range order, have been used in a variety of applications, from conductive additives and contact materials to transistors and photovoltaics. Here we show a flexible solution-based method of preparing thin films with tunable electrical properti...
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| Format: | Article |
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American Chemical Society (ACS)
2017
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| Online Access: | http://hdl.handle.net/1721.1/111973 https://orcid.org/0000-0001-8975-6434 https://orcid.org/0000-0003-4148-2424 https://orcid.org/0000-0003-1281-2359 |
| _version_ | 1811087942651740160 |
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| author | Keller, Brent D. Ferralis, Nicola Grossman, Jeffrey C. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Keller, Brent D. Ferralis, Nicola Grossman, Jeffrey C. |
| author_sort | Keller, Brent D. |
| collection | MIT |
| description | Disordered carbon materials, both amorphous and with long-range order, have been used in a variety of applications, from conductive additives and contact materials to transistors and photovoltaics. Here we show a flexible solution-based method of preparing thin films with tunable electrical properties from suspensions of ball-milled coals following centrifugation. The as-prepared films retain the rich carbon chemistry of the starting coals with conductivities ranging over orders of magnitude, and thermal treatment of the resulting films further tunes the electrical conductivity in excess of 7 orders of magnitude. Optical absorption measurements demonstrate tunable optical gaps from 0 to 1.8 eV. Through low-temperature conductivity measurements and Raman spectroscopy, we demonstrate that variable range hopping controls the electrical properties in as-prepared and thermally treated films and that annealing increases the sp 2 content, localization length, and disorder. The measured hopping energies demonstrate electronic properties similar to amorphous carbon materials and reduced graphene oxide. Finally, Joule heating devices were fabricated from coal-based films, and temperatures as high as 285 °C with excellent stability were achieved. |
| first_indexed | 2024-09-23T13:54:16Z |
| format | Article |
| id | mit-1721.1/111973 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:54:16Z |
| publishDate | 2017 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1119732022-09-28T16:58:41Z Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices Keller, Brent D. Ferralis, Nicola Grossman, Jeffrey C. Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Research Laboratory of Electronics Keller, Brent D. Ferralis, Nicola Grossman, Jeffrey C. Disordered carbon materials, both amorphous and with long-range order, have been used in a variety of applications, from conductive additives and contact materials to transistors and photovoltaics. Here we show a flexible solution-based method of preparing thin films with tunable electrical properties from suspensions of ball-milled coals following centrifugation. The as-prepared films retain the rich carbon chemistry of the starting coals with conductivities ranging over orders of magnitude, and thermal treatment of the resulting films further tunes the electrical conductivity in excess of 7 orders of magnitude. Optical absorption measurements demonstrate tunable optical gaps from 0 to 1.8 eV. Through low-temperature conductivity measurements and Raman spectroscopy, we demonstrate that variable range hopping controls the electrical properties in as-prepared and thermally treated films and that annealing increases the sp 2 content, localization length, and disorder. The measured hopping energies demonstrate electronic properties similar to amorphous carbon materials and reduced graphene oxide. Finally, Joule heating devices were fabricated from coal-based films, and temperatures as high as 285 °C with excellent stability were achieved. 2017-10-26T17:50:50Z 2017-10-26T17:50:50Z 2016-05 2015-11 2017-10-10T17:13:33Z Article http://purl.org/eprint/type/JournalArticle 1530-6984 1530-6992 http://hdl.handle.net/1721.1/111973 Keller, Brent D. et al. “Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices.” Nano Letters 16, 5 (May 2016): 2951–2957 © 2016 American Chemical Society. https://orcid.org/0000-0001-8975-6434 https://orcid.org/0000-0003-4148-2424 https://orcid.org/0000-0003-1281-2359 http://dx.doi.org/10.1021/ACS.NANOLETT.5B04735 Nano Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society (ACS) MIT Web Domain |
| spellingShingle | Keller, Brent D. Ferralis, Nicola Grossman, Jeffrey C. Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices |
| title | Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices |
| title_full | Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices |
| title_fullStr | Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices |
| title_full_unstemmed | Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices |
| title_short | Rethinking Coal: Thin Films of Solution Processed Natural Carbon Nanoparticles for Electronic Devices |
| title_sort | rethinking coal thin films of solution processed natural carbon nanoparticles for electronic devices |
| url | http://hdl.handle.net/1721.1/111973 https://orcid.org/0000-0001-8975-6434 https://orcid.org/0000-0003-4148-2424 https://orcid.org/0000-0003-1281-2359 |
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