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Melanin thin-films: a perspective on optical and electrical properties

J. V. Paulin Orcid Logo, A. P. Coleone, A. Batagin-Neto Orcid Logo, Gregory Burwell Orcid Logo, Paul Meredith Orcid Logo, C. F. O. Graeff, Bernard Mostert Orcid Logo

Journal of Materials Chemistry C, Volume: 9, Issue: 26, Pages: 8345 - 8358

Swansea University Authors: Gregory Burwell Orcid Logo, Paul Meredith Orcid Logo, Bernard Mostert Orcid Logo

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DOI (Published version): 10.1039/d1tc01440d

Abstract

Melanins are an essential natural pigment found throughout nature. Due to their inherent biocompatibility, optical and electronic properties, the melanins are attracting attention as model materials for sustainable organic optoelectronic and bioelectronic applications. Standard melanin is notoriousl...

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Published in: Journal of Materials Chemistry C
ISSN: 2050-7526 2050-7534
Published: Royal Society of Chemistry (RSC) 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa64649
first_indexed 2023-10-03T13:43:11Z
last_indexed 2024-11-25T14:14:26Z
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Due to their inherent biocompatibility, optical and electronic properties, the melanins are attracting attention as model materials for sustainable organic optoelectronic and bioelectronic applications. Standard melanin is notoriously insoluble, which complicates processability considerably. Hence, the creation of synthetic derivatives that have similar optical&#x2013;electronic properties but with increased solubility are avenues of active investigation. In this work, we investigate soluble non-functionalised (NF) and sulfonated (S) melanin derivatives. So far, these new synthetic derivatives&#x2019; optical and electrical properties have not been explored in full, which would allow their effective application in optoelectronic devices. Our optical results suggest that these materials have high refractive indices and also high dispersion and chromatic aberration. In addition, no significant differences in NF-melanin's charge transport deposited from pure water or aqueous ammonia solution were observed, and S-melanin's functional groups did not affect the hydration-dependence conductivity, only its sensitivity to environmental humidity. The similarities and differences in spectra and values comparing NF and S-melanin are discussed based on their structural differences.</abstract><type>Journal Article</type><journal>Journal of Materials Chemistry C</journal><volume>9</volume><journalNumber>26</journalNumber><paginationStart>8345</paginationStart><paginationEnd>8358</paginationEnd><publisher>Royal Society of Chemistry (RSC)</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>2050-7526</issnPrint><issnElectronic>2050-7534</issnElectronic><keywords>Melanins, thin-films, optoelectronic, bioelectronic</keywords><publishedDay>14</publishedDay><publishedMonth>6</publishedMonth><publishedYear>2021</publishedYear><publishedDate>2021-06-14</publishedDate><doi>10.1039/d1tc01440d</doi><url>http://dx.doi.org/10.1039/d1tc01440d</url><notes/><college>COLLEGE NANME</college><department>Biosciences Geography and Physics School</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>BGPS</DepartmentCode><institution>Swansea University</institution><apcterm>Another institution paid the OA fee</apcterm><funders>S&#xE3;o Paulo Research Foundation , National Council for Scientific and Technological Development , Coordination for the Improvement of Higher Education Personnel (CAPES). Welsh Government European Regional Development Fund European Union's Horizon 2020 Research and Innovation program Welsh Government's S&#xEA;r Cymru II Capacity Builder Accelerator Program Welsh European Funding Office Swansea University Strategic Initiative in Sustainable Advanced Materials Center for Scientific Computing (NCC/GridUNESP) of the S&#xE3;o Paulo State University (UNESP)</funders><projectreference>FAPESP; grants 2012/03116-7, 2013/07296-2, 2015/23000-1, 2018/02411-1 CNPq, grants: 573636/2008-7, 308360/2018-4, 420449/2018-3 Marie Sk&#x142;odowska-Curie grant agreement no. 663830</projectreference><lastEdited>2023-11-06T11:33:36.5577648</lastEdited><Created>2023-10-03T14:36:12.0041461</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Physics</level></path><authors><author><firstname>J. 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O.</firstname><surname>Graeff</surname><order>6</order></author><author><firstname>Bernard</firstname><surname>Mostert</surname><orcid>0000-0002-9590-2124</orcid><order>7</order></author></authors><documents><document><filename>64649__28934__07a94dadaea946b686364fa781b5a709.pdf</filename><originalFilename>64649.AAM.pdf</originalFilename><uploaded>2023-11-06T11:07:15.7261763</uploaded><type>Output</type><contentLength>773031</contentLength><contentType>application/pdf</contentType><version>Accepted Manuscript</version><cronfaStatus>true</cronfaStatus><embargoDate>2022-06-14T00:00:00.0000000</embargoDate><copyrightCorrect>true</copyrightCorrect><language>eng</language></document></documents><OutputDurs/></rfc1807>
spelling 2023-11-06T11:33:36.5577648 v2 64649 2023-10-03 Melanin thin-films: a perspective on optical and electrical properties 49890fbfbe127d4ae94bc10dc2b24199 0000-0002-2534-9626 Gregory Burwell Gregory Burwell true false 31e8fe57fa180d418afd48c3af280c2e 0000-0002-9049-7414 Paul Meredith Paul Meredith true false a353503c976a7338c7708a32e82f451f 0000-0002-9590-2124 Bernard Mostert Bernard Mostert true false 2023-10-03 BGPS Melanins are an essential natural pigment found throughout nature. Due to their inherent biocompatibility, optical and electronic properties, the melanins are attracting attention as model materials for sustainable organic optoelectronic and bioelectronic applications. Standard melanin is notoriously insoluble, which complicates processability considerably. Hence, the creation of synthetic derivatives that have similar optical–electronic properties but with increased solubility are avenues of active investigation. In this work, we investigate soluble non-functionalised (NF) and sulfonated (S) melanin derivatives. So far, these new synthetic derivatives’ optical and electrical properties have not been explored in full, which would allow their effective application in optoelectronic devices. Our optical results suggest that these materials have high refractive indices and also high dispersion and chromatic aberration. In addition, no significant differences in NF-melanin's charge transport deposited from pure water or aqueous ammonia solution were observed, and S-melanin's functional groups did not affect the hydration-dependence conductivity, only its sensitivity to environmental humidity. The similarities and differences in spectra and values comparing NF and S-melanin are discussed based on their structural differences. Journal Article Journal of Materials Chemistry C 9 26 8345 8358 Royal Society of Chemistry (RSC) 2050-7526 2050-7534 Melanins, thin-films, optoelectronic, bioelectronic 14 6 2021 2021-06-14 10.1039/d1tc01440d http://dx.doi.org/10.1039/d1tc01440d COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University Another institution paid the OA fee São Paulo Research Foundation , National Council for Scientific and Technological Development , Coordination for the Improvement of Higher Education Personnel (CAPES). Welsh Government European Regional Development Fund European Union's Horizon 2020 Research and Innovation program Welsh Government's Sêr Cymru II Capacity Builder Accelerator Program Welsh European Funding Office Swansea University Strategic Initiative in Sustainable Advanced Materials Center for Scientific Computing (NCC/GridUNESP) of the São Paulo State University (UNESP) FAPESP; grants 2012/03116-7, 2013/07296-2, 2015/23000-1, 2018/02411-1 CNPq, grants: 573636/2008-7, 308360/2018-4, 420449/2018-3 Marie Skłodowska-Curie grant agreement no. 663830 2023-11-06T11:33:36.5577648 2023-10-03T14:36:12.0041461 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics J. V. Paulin 0000-0002-2379-6203 1 A. P. Coleone 2 A. Batagin-Neto 0000-0003-4609-9002 3 Gregory Burwell 0000-0002-2534-9626 4 Paul Meredith 0000-0002-9049-7414 5 C. F. O. Graeff 6 Bernard Mostert 0000-0002-9590-2124 7 64649__28934__07a94dadaea946b686364fa781b5a709.pdf 64649.AAM.pdf 2023-11-06T11:07:15.7261763 Output 773031 application/pdf Accepted Manuscript true 2022-06-14T00:00:00.0000000 true eng
title Melanin thin-films: a perspective on optical and electrical properties
spellingShingle Melanin thin-films: a perspective on optical and electrical properties
Gregory Burwell
Paul Meredith
Bernard Mostert
title_short Melanin thin-films: a perspective on optical and electrical properties
title_full Melanin thin-films: a perspective on optical and electrical properties
title_fullStr Melanin thin-films: a perspective on optical and electrical properties
title_full_unstemmed Melanin thin-films: a perspective on optical and electrical properties
title_sort Melanin thin-films: a perspective on optical and electrical properties
author_id_str_mv 49890fbfbe127d4ae94bc10dc2b24199
31e8fe57fa180d418afd48c3af280c2e
a353503c976a7338c7708a32e82f451f
author_id_fullname_str_mv 49890fbfbe127d4ae94bc10dc2b24199_***_Gregory Burwell
31e8fe57fa180d418afd48c3af280c2e_***_Paul Meredith
a353503c976a7338c7708a32e82f451f_***_Bernard Mostert
author Gregory Burwell
Paul Meredith
Bernard Mostert
author2 J. V. Paulin
A. P. Coleone
A. Batagin-Neto
Gregory Burwell
Paul Meredith
C. F. O. Graeff
Bernard Mostert
format Journal article
container_title Journal of Materials Chemistry C
container_volume 9
container_issue 26
container_start_page 8345
publishDate 2021
institution Swansea University
issn 2050-7526
2050-7534
doi_str_mv 10.1039/d1tc01440d
publisher Royal Society of Chemistry (RSC)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://dx.doi.org/10.1039/d1tc01440d
document_store_str 1
active_str 0
description Melanins are an essential natural pigment found throughout nature. Due to their inherent biocompatibility, optical and electronic properties, the melanins are attracting attention as model materials for sustainable organic optoelectronic and bioelectronic applications. Standard melanin is notoriously insoluble, which complicates processability considerably. Hence, the creation of synthetic derivatives that have similar optical–electronic properties but with increased solubility are avenues of active investigation. In this work, we investigate soluble non-functionalised (NF) and sulfonated (S) melanin derivatives. So far, these new synthetic derivatives’ optical and electrical properties have not been explored in full, which would allow their effective application in optoelectronic devices. Our optical results suggest that these materials have high refractive indices and also high dispersion and chromatic aberration. In addition, no significant differences in NF-melanin's charge transport deposited from pure water or aqueous ammonia solution were observed, and S-melanin's functional groups did not affect the hydration-dependence conductivity, only its sensitivity to environmental humidity. The similarities and differences in spectra and values comparing NF and S-melanin are discussed based on their structural differences.
published_date 2021-06-14T14:34:15Z
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score 11.048237

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