Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications

Abstract We investigate conducting characteristics of biochar derived from the pyrolysis of a paper at terahertz frequencies. Paper is annealed under temperatures ranging from 600 to 1000 °C to modify structural and electrical properties. We experimentally observe that the terahertz conductivity inc...

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Autores principales:	Woongkyu Park, Hyuntae Kim, Hajung Park, Soobong Choi, Sung Ju Hong, Young-Mi Bahk
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d0ac30c7c5ce4be889d1c4d26e80e7f3
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spelling	oai:doaj.org-article:d0ac30c7c5ce4be889d1c4d26e80e7f32021-12-02T18:33:47ZBiochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications10.1038/s41598-021-98009-52045-2322https://doaj.org/article/d0ac30c7c5ce4be889d1c4d26e80e7f32021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98009-5https://doaj.org/toc/2045-2322Abstract We investigate conducting characteristics of biochar derived from the pyrolysis of a paper at terahertz frequencies. Paper is annealed under temperatures ranging from 600 to 1000 °C to modify structural and electrical properties. We experimentally observe that the terahertz conductivity increases above 102 S/m as the annealing temperature increases up to 800 °C. From structural characterization using energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, we confirm that more graphitic biochars are produced in high annealing temperature, in agreement with the improvement of terahertz conductivity. Our results show that biochar can be a highly promising candidate to be used in paper-based devices operating at terahertz frequencies.Woongkyu ParkHyuntae KimHajung ParkSoobong ChoiSung Ju HongYoung-Mi BahkNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Woongkyu Park Hyuntae Kim Hajung Park Soobong Choi Sung Ju Hong Young-Mi Bahk Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications
description	Abstract We investigate conducting characteristics of biochar derived from the pyrolysis of a paper at terahertz frequencies. Paper is annealed under temperatures ranging from 600 to 1000 °C to modify structural and electrical properties. We experimentally observe that the terahertz conductivity increases above 102 S/m as the annealing temperature increases up to 800 °C. From structural characterization using energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, we confirm that more graphitic biochars are produced in high annealing temperature, in agreement with the improvement of terahertz conductivity. Our results show that biochar can be a highly promising candidate to be used in paper-based devices operating at terahertz frequencies.
format	article
author	Woongkyu Park Hyuntae Kim Hajung Park Soobong Choi Sung Ju Hong Young-Mi Bahk
author_facet	Woongkyu Park Hyuntae Kim Hajung Park Soobong Choi Sung Ju Hong Young-Mi Bahk
author_sort	Woongkyu Park
title	Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications
title_short	Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications
title_full	Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications
title_fullStr	Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications
title_full_unstemmed	Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications
title_sort	biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d0ac30c7c5ce4be889d1c4d26e80e7f3
work_keys_str_mv	AT woongkyupark biocharasalowcostecofriendlyandelectricallyconductivematerialforterahertzapplications AT hyuntaekim biocharasalowcostecofriendlyandelectricallyconductivematerialforterahertzapplications AT hajungpark biocharasalowcostecofriendlyandelectricallyconductivematerialforterahertzapplications AT soobongchoi biocharasalowcostecofriendlyandelectricallyconductivematerialforterahertzapplications AT sungjuhong biocharasalowcostecofriendlyandelectricallyconductivematerialforterahertzapplications AT youngmibahk biocharasalowcostecofriendlyandelectricallyconductivematerialforterahertzapplications
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Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications

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