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Salomäki M, Ouvinen T, Marttila L, Kivelä H, Leiro J, Mäkilä E, Lukkari J. Polydopamine Nanoparticles Prepared Using Redox-Active Transition Metals. J Phys Chem B 2019; 123:2513-2524. [PMID: 30813731 PMCID: PMC6727379 DOI: 10.1021/acs.jpcb.8b11994] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/27/2019] [Indexed: 01/01/2023]
Abstract
Autoxidation of dopamine to polydopamine by dissolved oxygen is a slow process that requires highly alkaline conditions. Polydopamine can be formed rapidly also in mildly acidic and neutral solutions by using redox-active transition-metal ions. We present a comparative study of polydopamine nanoparticles formed by autoxidation and aerobic or anaerobic oxidation in the presence of Ce(IV), Fe(III), Cu(II), and Mn(VII). The UV-vis spectra of the purified nanoparticles are similar, and dopaminechrome is an early intermediate species. At low pH, Cu(II) requires the presence of oxygen and chloride ions to produce polydopamine at a reasonable rate. The changes in dispersibility and surface charge take place at around pH 4, which indicates the presence of ionizable groups, especially carboxylic acids, on their surface. X-ray photoelectron spectroscopy shows the presence of three different classes of carbons, and the carbonyl/carboxylate carbons amount to 5-15 atom %. The N 1s spectra show the presence of protonated free amino groups, suggesting that these groups may interact with the π-electrons of the intact aromatic dihydroxyindole moieties, especially in the metal-induced samples. The autoxidized and Mn(VII)-induced samples do not contain metals, but the metal content is 1-2 atom % in samples prepared with Ce(IV) or Cu(II), and ca. 20 atom % in polydopamine prepared in the presence of Fe(III). These differences in the metal content can be explained by the oxidation and complexation properties of the metals using the general model developed. In addition, the nitrogen content is lower in the metal-induced samples. All of the metal oxidants studied can be used to rapidly prepare polydopamine at room temperature, but the possible influence of the metal content and nitrogen loss should be taken into account.
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Affiliation(s)
- Mikko Salomäki
- Department
of Chemistry, Department of Physics and Astronomy, Turku University Centre for Surfaces
and Materials (MatSurf), and Doctoral Programme in Physical and Chemical
Sciences, University of Turku, FI-20014 Turku, Finland
| | - Tuomo Ouvinen
- Department
of Chemistry, Department of Physics and Astronomy, Turku University Centre for Surfaces
and Materials (MatSurf), and Doctoral Programme in Physical and Chemical
Sciences, University of Turku, FI-20014 Turku, Finland
| | - Lauri Marttila
- Department
of Chemistry, Department of Physics and Astronomy, Turku University Centre for Surfaces
and Materials (MatSurf), and Doctoral Programme in Physical and Chemical
Sciences, University of Turku, FI-20014 Turku, Finland
| | - Henri Kivelä
- Department
of Chemistry, Department of Physics and Astronomy, Turku University Centre for Surfaces
and Materials (MatSurf), and Doctoral Programme in Physical and Chemical
Sciences, University of Turku, FI-20014 Turku, Finland
| | - Jarkko Leiro
- Department
of Chemistry, Department of Physics and Astronomy, Turku University Centre for Surfaces
and Materials (MatSurf), and Doctoral Programme in Physical and Chemical
Sciences, University of Turku, FI-20014 Turku, Finland
| | - Ermei Mäkilä
- Department
of Chemistry, Department of Physics and Astronomy, Turku University Centre for Surfaces
and Materials (MatSurf), and Doctoral Programme in Physical and Chemical
Sciences, University of Turku, FI-20014 Turku, Finland
| | - Jukka Lukkari
- Department
of Chemistry, Department of Physics and Astronomy, Turku University Centre for Surfaces
and Materials (MatSurf), and Doctoral Programme in Physical and Chemical
Sciences, University of Turku, FI-20014 Turku, Finland
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Jin Z, Fan H. The modulation of melanin-like materials: methods, characterization and applications. POLYM INT 2016. [DOI: 10.1002/pi.5187] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhaoxia Jin
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
| | - Hailong Fan
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
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Kim YJ, Wu W, Chun SE, Whitacre JF, Bettinger CJ. Biologically derived melanin electrodes in aqueous sodium-ion energy storage devices. Proc Natl Acad Sci U S A 2013; 110:20912-7. [PMID: 24324163 PMCID: PMC3876213 DOI: 10.1073/pnas.1314345110] [Citation(s) in RCA: 159] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Biodegradable electronics represents an attractive and emerging paradigm in medical devices by harnessing simultaneous advantages afforded by electronically active systems and obviating issues with chronic implants. Integrating practical energy sources that are compatible with the envisioned operation of transient devices is an unmet challenge for biodegradable electronics. Although high-performance energy storage systems offer a feasible solution, toxic materials and electrolytes present regulatory hurdles for use in temporary medical devices. Aqueous sodium-ion charge storage devices combined with biocompatible electrodes are ideal components to power next-generation biodegradable electronics. Here, we report the use of biologically derived organic electrodes composed of melanin pigments for use in energy storage devices. Melanins of natural (derived from Sepia officinalis) and synthetic origin are evaluated as anode materials in aqueous sodium-ion storage devices. Na(+)-loaded melanin anodes exhibit specific capacities of 30.4 ± 1.6 mAhg(-1). Full cells composed of natural melanin anodes and λ-MnO2 cathodes exhibit an initial potential of 1.03 ± 0.06 V with a maximum specific capacity of 16.1 ± 0.8 mAhg(-1). Natural melanin anodes exhibit higher specific capacities compared with synthetic melanins due to a combination of beneficial chemical, electrical, and physical properties exhibited by the former. Taken together, these results suggest that melanin pigments may serve as a naturally occurring biologically derived charge storage material to power certain types of medical devices.
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Affiliation(s)
- Young Jo Kim
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
| | - Wei Wu
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
| | - Sang-Eun Chun
- Department of Chemistry, University of Oregon, Eugene, OR 97403; and
| | - Jay F. Whitacre
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
- Departments of Engineering and Public Policy and
| | - Christopher J. Bettinger
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
- Biomedical Engineering,Carnegie Mellon University, Pittsburgh, PA 15213
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