The interplay of chemical structure, physical properties, and structural design as a tool to modulate the properties of melanins within mesopores Article Swipe
Alessandro Pira
,
Alberto Amatucci
,
Claudio Melis
,
Alessandro Pezzella
,
Paola Manini
,
Marco d’Ischia
,
Guido Mula
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1038/s41598-022-14347-y
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1038/s41598-022-14347-y
The design of modern devices that can fulfil the requirements for sustainability and renewable energy applications calls for both new materials and a better understanding of the mixing of existing materials. Among those, surely organic–inorganic hybrids are gaining increasing attention due to the wide possibility to tailor their properties by accurate structural design and materials choice. In this work, we’ll describe the tight interplay between porous Si and two melanic polymers permeating the pores. Melanins are a class of biopolymers, known to cause pigmentation in many living species, that shows very interesting potential applications in a wide variety of fields. Given the complexity of the polymerization process beyond the formation and structure, the full understanding of the melanins' properties remains a challenging task. In this study, the use of a melanin/porous Si hybrid as a tool to characterize the polymer’s properties within mesopores gives new insights into the conduction mechanisms of melanins. We demonstrate the dramatic effect induced on these mechanisms in a confined environment by the presence of a thick interface. In previous studies, we already showed that the interactions at the interface between porous Si and eumelanin play a key role in determining the final properties of composite materials. Here, thanks to a careful monitoring of the photoconductivity properties of porous Si filled with melanins obtained by ammonia-induced solid-state polymerization (AISSP) of 5,6-dihydroxyindole (DHI) or 1,8-dihydroxynaphthalene (DHN), we investigate the effect of wet, dry, and vacuum cycles of storage from the freshly prepared samples to months-old samples. A computational study on the mobility of water molecules within a melanin polymer is also presented to complete the understanding of the experimental data. Our results demonstrate that: (a) the hydration-dependent behavior of melanins is recovered in large pores (≈ 60 nm diameter) while is almost absent in thinner pores (≈ 20 nm diameter); (b) DHN-melanin materials can generate higher photocurrents and proved to be stable for several weeks and more sensitive to the wet/dry variations.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1038/s41598-022-14347-y
- https://www.nature.com/articles/s41598-022-14347-y.pdf
- OA Status
- gold
- Cited By
- 8
- References
- 80
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4284894084
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4284894084Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1038/s41598-022-14347-yDigital Object Identifier
- Title
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The interplay of chemical structure, physical properties, and structural design as a tool to modulate the properties of melanins within mesoporesWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
-
2022Year of publication
- Publication date
-
2022-07-06Full publication date if available
- Authors
-
Alessandro Pira, Alberto Amatucci, Claudio Melis, Alessandro Pezzella, Paola Manini, Marco d’Ischia, Guido MulaList of authors in order
- Landing page
-
https://doi.org/10.1038/s41598-022-14347-yPublisher landing page
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https://www.nature.com/articles/s41598-022-14347-y.pdfDirect link to full text PDF
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YesWhether a free full text is available
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-
goldOpen access status per OpenAlex
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https://www.nature.com/articles/s41598-022-14347-y.pdfDirect OA link when available
- Concepts
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Mesoporous material, Polymerization, Materials science, Porosity, Polymer, Nanotechnology, Porous medium, Rational design, Characterization (materials science), Computer science, Chemistry, Composite material, Organic chemistry, CatalysisTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
8Total citation count in OpenAlex
- Citations by year (recent)
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2025: 2, 2024: 3, 2023: 1, 2022: 2Per-year citation counts (last 5 years)
- References (count)
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80Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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| abstract_inverted_index.photoconductivity | 210 |
| abstract_inverted_index.5,6-dihydroxyindole | 225 |
| abstract_inverted_index.hydration-dependent | 280 |
| abstract_inverted_index.organic–inorganic | 35 |
| abstract_inverted_index.1,8-dihydroxynaphthalene | 228 |
| cited_by_percentile_year.max | 97 |
| cited_by_percentile_year.min | 89 |
| countries_distinct_count | 1 |
| institutions_distinct_count | 7 |
| sustainable_development_goals[0].id | https://metadata.un.org/sdg/12 |
| sustainable_development_goals[0].score | 0.44999998807907104 |
| sustainable_development_goals[0].display_name | Responsible consumption and production |
| citation_normalized_percentile.value | 0.72041426 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | False |