Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin
The conductivity of aqueous (distilled and natural water) solutions of fungal melanin (purified and non-purified) has been studied. It has been shown that, in the presence of impurities, the conductivity of the solution increases (for the concentration 0.1 wt% by about an order of magnitude). On the...
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| Veröffentlicht in: | Semiconductor Physics Quantum Electronics & Optoelectronics |
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| Datum: | 2018 |
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| Format: | Artikel |
| Sprache: | Englisch |
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Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2018
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| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/215138 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin / O.V. Kovalchuk, T.M. Kovalchuk // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2018. — Т. 21, № 1. — С. 95-99. — Бібліогр.: 11 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862659464543338496 |
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| author | Kovalchuk, O.V. Kovalchuk, T.M. |
| author_facet | Kovalchuk, O.V. Kovalchuk, T.M. |
| citation_txt | Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin / O.V. Kovalchuk, T.M. Kovalchuk // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2018. — Т. 21, № 1. — С. 95-99. — Бібліогр.: 11 назв. — англ. |
| collection | DSpace DC |
| container_title | Semiconductor Physics Quantum Electronics & Optoelectronics |
| description | The conductivity of aqueous (distilled and natural water) solutions of fungal melanin (purified and non-purified) has been studied. It has been shown that, in the presence of impurities, the conductivity of the solution increases (for the concentration 0.1 wt% by about an order of magnitude). On the concentration dependences of the melanin conductivity within the range of 0.0001 to 1 wt.%, at least three particular sections have been detected. It was suggested that the presence of such sections is caused by three types of aggregation of melanin molecules: aggregation of several (mostly oppositely charged) molecules under the lowest melanin concentration, formation of nanoscale melanin clusters for the concentration of 0.002 to 0.06 wt.%, and formation of micelles, when the melanin concentration is higher than 0.1 wt.%.
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| first_indexed | 2026-03-21T13:47:17Z |
| format | Article |
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| id | nasplib_isofts_kiev_ua-123456789-215138 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1560-8034 |
| language | English |
| last_indexed | 2026-03-21T13:47:17Z |
| publishDate | 2018 |
| publisher | Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| record_format | dspace |
| spelling | Kovalchuk, O.V. Kovalchuk, T.M. 2026-03-09T09:42:02Z 2018 Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin / O.V. Kovalchuk, T.M. Kovalchuk // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2018. — Т. 21, № 1. — С. 95-99. — Бібліогр.: 11 назв. — англ. 1560-8034 PACS: 87.15.N- https://nasplib.isofts.kiev.ua/handle/123456789/215138 https://doi.org/10.15407/spqeo21.01.095 The conductivity of aqueous (distilled and natural water) solutions of fungal melanin (purified and non-purified) has been studied. It has been shown that, in the presence of impurities, the conductivity of the solution increases (for the concentration 0.1 wt% by about an order of magnitude). On the concentration dependences of the melanin conductivity within the range of 0.0001 to 1 wt.%, at least three particular sections have been detected. It was suggested that the presence of such sections is caused by three types of aggregation of melanin molecules: aggregation of several (mostly oppositely charged) molecules under the lowest melanin concentration, formation of nanoscale melanin clusters for the concentration of 0.002 to 0.06 wt.%, and formation of micelles, when the melanin concentration is higher than 0.1 wt.%. The work was carried out with the financial support of the budgetary theme 1.4.B/162 of the Institute of Physics, NAS of Ukraine. We are grateful to L.F. Gorovoi from the Institute of Cell Biology and Genetic Engineering of NAS of Ukraine for providing samples. en Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України Semiconductor Physics Quantum Electronics & Optoelectronics Sensors Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin Article published earlier |
| spellingShingle | Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin Kovalchuk, O.V. Kovalchuk, T.M. Sensors |
| title | Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin |
| title_full | Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin |
| title_fullStr | Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin |
| title_full_unstemmed | Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin |
| title_short | Nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin |
| title_sort | nonmonotonic (in concentration) conductivity of aqueous solutions of fungal melanin |
| topic | Sensors |
| topic_facet | Sensors |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/215138 |
| work_keys_str_mv | AT kovalchukov nonmonotonicinconcentrationconductivityofaqueoussolutionsoffungalmelanin AT kovalchuktm nonmonotonicinconcentrationconductivityofaqueoussolutionsoffungalmelanin |