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Brizuela Guerra N, Morais Lima JV, Nozella NL, Boratto MH, Paulin JV, Graeff CFDO. Electrochemical Doping Effect on the Conductivity of Melanin-Inspired Materials. ACS APPLIED BIO MATERIALS 2024; 7:2186-2196. [PMID: 38466818 DOI: 10.1021/acsabm.3c01166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Eumelanin is a natural pigment that can be particularly valuable for sustainable bioelectronic devices due to its inherent biocompatibility and hydration-dependent conductivity. However, the low conductivity of eumelanin limits its technological development. In this research, electrochemical doping was proposed as an alternative route to increase the electronic conductivity of synthetic eumelanin derivatives. Thin films of sulfonated eumelanin were deposited on platinum interdigitated electrodes and electrochemically treated by using cyclic voltammetry and chronoamperometry treatments. X-ray photoelectron spectroscopy analysis confirmed ion doping in sulfonated melanin. Current-voltage, current-time, and electrochemical impedance measurements were used to investigate the effect of different aqueous electrolytes (including KCl and LiClO4) treatments on the charge transport of sulfonated eumelanin. We show that the conductivity depends on the type and size of the anion used and can reach 10-3 S·cm-1. Additionally, depending on the electrolyte, there is a change in charge transport from mixed ionic/electronic to a predominantly electronic-only conduction. Our results show that the chemical nature of the ion plays an important role in the electrochemical doping and, consequently, in the charge transport of eumelanin. These insights serve as inspiration to explore the use of alternative electrolytes with different compositions further and develop eumelanin-based devices with tunable conductivities.
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Affiliation(s)
- Nayrim Brizuela Guerra
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - João Victor Morais Lima
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - Natan Luis Nozella
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - Miguel Henrique Boratto
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - João Vitor Paulin
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
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2
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Dittrich M, Paulo C, Knabe N, Sturm H, Zaitsev V, Gorbushina AA. Microscopic Raman study of fungal pigment using the genetically amenable rock inhabitant Knufia petricola as a model organism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123250. [PMID: 37625274 DOI: 10.1016/j.saa.2023.123250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023]
Abstract
Fungal pigments such as melanin and carotenoids are distinctive markers of animal and plant pathogenic fungi as well as their environmental relatives. These complex pigments play important roles in pathogenicity and stress tolerance while also being useful as biomarkers. Accordingly, it is important to be able to identify in situ the pigments in black fungi, a group of clinical and environmental importance. In this study, wild-type and genetically modified strains of Knufia petricola A95 and wild fungal cells attached to ancient rock were investigated for their spectroscopic and microscopic Raman features and morphological appearance. Knockout mutants of melanin synthesis genes pks1 (polyketide synthase), sdh1 (scytalone dehydratase), and both pks1 and the carotenoid synthesis gene phd1 (phytoene desaturase) were studied We applied two different Raman microscopes using two lasers, with 633 nm and 488 nm wavelengths. We analyzed and compared Raman spectra between the measured reference substances and the mutant and wild-type strains. In the wild strain WT:A95, the peaks close to melanin peals were found at 1353 cm-1 and 1611 cm-1. There are no characteristic melanin peaks at 1580-1600 cm-1 and around 1350 cm-1 at the spectrum of the Δpks1/Δphd1 mutant and the Δsdh1 mutant. The Δpks1 mutant spectrum has the peaks at the beta-carotene v2 C-C in-plane stretch at 1155 cm-1 and v3 C-CH3 deformation at 1005 cm-1. The peaks of carotenoids and melanin were found in all mutants and the wild strain, except the Δpks1/Δphd1 mutant. Raman spectra allow for discrimination between the various pigments. Hence, interactions between natural fungal melanin, as well as other protective pigments, and complex environmental matrices can be characterized on a range of spatial and temporal scales.
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Affiliation(s)
- Maria Dittrich
- University of Toronto Scarborough, 1065 Military Trail, Toronto, ON M1C 1A4, Canada.
| | - Carlos Paulo
- University of Toronto Scarborough, 1065 Military Trail, Toronto, ON M1C 1A4, Canada
| | - Nicole Knabe
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - Heinz Sturm
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - Vladimir Zaitsev
- Moscow State University, Physics Department, Leninskie Gory, 1-2, Moscow, Russia
| | - Anna A Gorbushina
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany; Freie Universität Berlin, Malteserstrasse 74-100, Berlin, Germany
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3
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Wu Z, Deng B, Zhou Y, Xie H, Zhang Y, Lin L, Ye J. Non-Invasive Detection, Precise Localization, and Perioperative Navigation of In Vivo Deep Lesions Using Transmission Raman Spectroscopy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2301721. [PMID: 37340601 PMCID: PMC10460859 DOI: 10.1002/advs.202301721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/20/2023] [Indexed: 06/22/2023]
Abstract
Non-invasive detection and precise localization of deep lesions have attracted significant attention for both fundamental and clinical studies. Optical modality techniques are promising with high sensitivity and molecular specificity, but are limited by shallow tissue penetration and the failure to accurately determine lesion depth. Here the authors report in vivo ratiometric surface-enhanced transmission Raman spectroscopy (SETRS) for non-invasive localization and perioperative surgery navigation of deep sentinel lymph nodes in live rats. The SETRS system uses ultrabright surface-enhanced Raman spectroscopy (SERS) nanoparticles with a low detection limit of 10 pM and a home-built photosafe transmission Raman spectroscopy setup. The ratiometric SETRS strategy is proposed based on the ratio of multiple Raman spectral peaks for obtaining lesion depth. Via this strategy, the depth of the phantom lesions in ex vivo rat tissues is precisely determined with a mean-absolute-percentage-error of 11.8%, and the accurate localization of a 6-mm-deep rat popliteal lymph node is achieved. The feasibility of ratiometric SETRS allows the successful perioperative navigation of in vivo lymph node biopsy surgery in live rats under clinically safe laser irradiance. This study represents a significant step toward the clinical translation of TRS techniques, providing new insights for the design and implementation of in vivo SERS applications.
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Affiliation(s)
- Zongyu Wu
- State Key Laboratory of Systems Medicine for Cancer, School of biomedical engineeringShanghai Jiao Tong UniversityShanghai200030P. R. China
| | - Binge Deng
- State Key Laboratory of Systems Medicine for Cancer, School of biomedical engineeringShanghai Jiao Tong UniversityShanghai200030P. R. China
| | - Yutong Zhou
- State Key Laboratory of Systems Medicine for Cancer, School of biomedical engineeringShanghai Jiao Tong UniversityShanghai200030P. R. China
| | - Haoqiang Xie
- State Key Laboratory of Systems Medicine for Cancer, School of biomedical engineeringShanghai Jiao Tong UniversityShanghai200030P. R. China
| | - Yumin Zhang
- State Key Laboratory of Systems Medicine for Cancer, School of biomedical engineeringShanghai Jiao Tong UniversityShanghai200030P. R. China
| | - Li Lin
- State Key Laboratory of Systems Medicine for Cancer, School of biomedical engineeringShanghai Jiao Tong UniversityShanghai200030P. R. China
| | - Jian Ye
- State Key Laboratory of Systems Medicine for Cancer, School of biomedical engineeringShanghai Jiao Tong UniversityShanghai200030P. R. China
- Institute of Medical RoboticsShanghai Jiao Tong UniversityShanghai200240P. R. China
- Shanghai Key Laboratory of Gynecologic Oncology, Ren Ji Hospital, School of MedicineShanghai Jiao Tong UniversityShanghai200127P. R. China
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4
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Seredin P, Goloshchapov D, Buylov N, Kashkarov V, Shikhaliev K, Potapov A, Ippolitov Y, Kartsev V, Kuyumchyan S, de Oliveira Freitas R. A Study of the Peculiarities of the Formation of a Hybrid Interface Based on Polydopamine between Dental Tissues and Dental Composites, Using IR and Raman Microspectroscopy, at the Submicron Level. Int J Mol Sci 2023; 24:11636. [PMID: 37511394 PMCID: PMC10380397 DOI: 10.3390/ijms241411636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/14/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
The creation of buffer (hybrid) layers that provide improved adhesion to two heterogeneous materials is a promising and high-priority research area in the field of dental materials science. In our work, using FTIR and Raman microspectroscopy at the submicron level in a system of dental composites/intact dental enamel, we assessed the molecular features of formation and chemically visualized the hybrid interface formed on the basis of a nature-like adhesive, polydopamine (PDA). It is shown that a homogeneous bioinspired PDA-hybrid interface with an increased content of O-Ca-O bonds can be created using traditional methods of dental tissue pretreatment (diamond micro drilling, acid etching), as well as the subsequent alkalinization procedure and the developed synthesis technology. The development of the proposed technology for accelerated deposition of PDA-hybrid layers, as well as the creation of self-assembled biomimetic nanocomposites with antibacterial properties, may in the future find clinical application for minimally invasive dental restoration procedures.
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Affiliation(s)
- Pavel Seredin
- Solid State Physics and Nanostructures Department, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Dmitry Goloshchapov
- Solid State Physics and Nanostructures Department, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Nikita Buylov
- Solid State Physics and Nanostructures Department, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Vladimir Kashkarov
- Solid State Physics and Nanostructures Department, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Khidmet Shikhaliev
- Laboratory of Organic Additives for the Processes of Chemical and Electrochemical Deposition of Metals and Alloys Used in the Electronics Industry, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Andrey Potapov
- Laboratory of Organic Additives for the Processes of Chemical and Electrochemical Deposition of Metals and Alloys Used in the Electronics Industry, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Yuri Ippolitov
- Department of Pediatric Dentistry with Orthodontia, Voronezh State Medical University, Studentcheskaya St. 11, 394006 Voronezh, Russia
| | | | - Sergey Kuyumchyan
- Saint Petersburg State University Hospital, 154, Fontanka River Embankment, 198103 St. Petersburg, Russia
| | - Raul de Oliveira Freitas
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Sao Paulo, Brazil
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5
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Bedran ZV, Zhukov SS, Abramov PA, Tyurenkov IO, Gorshunov BP, Mostert AB, Motovilov KA. Water-Activated Semiquinone Formation and Carboxylic Acid Dissociation in Melanin Revealed by Infrared Spectroscopy. Polymers (Basel) 2021; 13:4403. [PMID: 34960952 PMCID: PMC8705668 DOI: 10.3390/polym13244403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/29/2021] [Accepted: 12/09/2021] [Indexed: 01/22/2023] Open
Abstract
Eumelanin is a widespread biomacromolecule pigment in the biosphere and has been widely investigated for numerous bioelectronics and energetic applications. Many of these applications depend on eumelanin's ability to conduct proton current at various levels of hydration. The origin of this behavior is connected to a comproportionation reaction between oxidized and reduced monomer moieties and water. A hydration-dependent FTIR spectroscopic study on eumelanin is presented herein, which allows for the first time tracking the comproportionation reaction via the gradual increase of the overall aromaticity of melanin monomers in the course of hydration. We identified spectral features associated with the presence of specific "one and a half" C𝌁O bonds, typical for o-semiquinones. Signatures of semiquinone monomers with internal hydrogen bonds and that carboxylic groups, in contrast to semiquinones, begin to dissociate at the very beginning of melanin hydration were indicated. As such, we suggest a modification to the common hydration-dependent conductivity mechanism and propose that the conductivity at low hydration is dominated by carboxylic acid protons, whereas higher hydration levels manifest semiquinone protons.
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Affiliation(s)
- Zakhar V. Bedran
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Institute Lane 9, 141701 Dolgoprudny, Russia; (Z.V.B.); (S.S.Z.); (P.A.A.); (I.O.T.); (B.P.G.)
| | - Sergey S. Zhukov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Institute Lane 9, 141701 Dolgoprudny, Russia; (Z.V.B.); (S.S.Z.); (P.A.A.); (I.O.T.); (B.P.G.)
| | - Pavel A. Abramov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Institute Lane 9, 141701 Dolgoprudny, Russia; (Z.V.B.); (S.S.Z.); (P.A.A.); (I.O.T.); (B.P.G.)
| | - Ilya O. Tyurenkov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Institute Lane 9, 141701 Dolgoprudny, Russia; (Z.V.B.); (S.S.Z.); (P.A.A.); (I.O.T.); (B.P.G.)
| | - Boris P. Gorshunov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Institute Lane 9, 141701 Dolgoprudny, Russia; (Z.V.B.); (S.S.Z.); (P.A.A.); (I.O.T.); (B.P.G.)
| | - A. Bernardus Mostert
- Department of Chemistry, Swansea University, Singleton Park, Swansea SA2 8PP, UK;
| | - Konstantin A. Motovilov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Institute Lane 9, 141701 Dolgoprudny, Russia; (Z.V.B.); (S.S.Z.); (P.A.A.); (I.O.T.); (B.P.G.)
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6
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Badillo-Ramírez I, Saniger JM, Popp J, Cialla-May D. SERS characterization of dopamine and in situ dopamine polymerization on silver nanoparticles. Phys Chem Chem Phys 2021; 23:12158-12170. [PMID: 34008659 DOI: 10.1039/d1cp00966d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dopamine (DA) regulates several functions in the central nervous system and its depletion is responsible for psychological disorders like Parkinson's disease. Several analytical approaches have been presented for DA detection in pathological diagnosis. SERS spectroscopy is a highly promising technique for the sensitive detection of DA. However, an improvement in its detection in aqueous solution is highly desirable for reliable quantification in biological fluids. In this work, we explored a label-free SERS approach for DA detection, employing two conventional methods to synthesize Ag colloids: reduction via citrates (c-AgNPs) and reduction via hydroxylamine (h-AgNPs), and SERS measurements were performed with a laser at 488 nm wavelength. Under these conditions, DA was identified through reproducible SERS spectra in the c-AgNP medium; however, the SERS spectra of DA in h-AgNP solution showed a completely different SERS profile. SERS band analysis revealed that DA in h-AgNPs was oxidized and converted into polydopamine (PDA), which was triggered after exposure to laser radiation. DA oxidation and PDA formation were followed over time through the SERS band profile at pH 7, 9 and 12. We found that in situ PDA formation started after 50 min of laser irradiation of DA at pH 7, while DA was quickly oxidized at pH 9 and 12. Here, we present a detailed SERS band analysis of PDA, which sheds light on the molecular steps in the pathway formation of the PDA structure. Spectroscopic analysis and characterization revealed that a long laser exposure time led to the formation of stable PDA complexes with AgNPs, which allowed us to propose a novel approach for synthesis of AgNP-PDA composites. In conclusion, to detect DA through a label-free SERS approach, c-AgNPs must be employed, while stable AgNP-PDA materials can be achieved with h-AgNPs and 488 nm laser excitation.
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Affiliation(s)
- Isidro Badillo-Ramírez
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito exterior S/N, Ciudad Universitaria, 04510, Ciudad de México, Mexico.
| | - José M Saniger
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito exterior S/N, Ciudad Universitaria, 04510, Ciudad de México, Mexico.
| | - Jürgen Popp
- Friedrich Schiller University Jena, Institute of Physical Chemistry and Abbe Center of Photonics, Helmholtzweg 4, 07745, Jena, Germany and Leibniz Institute of Photonic Technology, Jena, Member of the Leibniz Research Alliance - Leibniz Health Technologies, Albert-Einstein-Str. 9, 07745, Jena, Germany
| | - Dana Cialla-May
- Friedrich Schiller University Jena, Institute of Physical Chemistry and Abbe Center of Photonics, Helmholtzweg 4, 07745, Jena, Germany and Leibniz Institute of Photonic Technology, Jena, Member of the Leibniz Research Alliance - Leibniz Health Technologies, Albert-Einstein-Str. 9, 07745, Jena, Germany
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7
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Understanding the way eumelanin works: A unique example of properties and skills driven by molecular heterogeneity. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Coy E, Iatsunskyi I, Colmenares JC, Kim Y, Mrówczyński R. Polydopamine Films with 2D-like Layered Structure and High Mechanical Resilience. ACS APPLIED MATERIALS & INTERFACES 2021; 13:23113-23120. [PMID: 33969981 PMCID: PMC8289185 DOI: 10.1021/acsami.1c02483] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 04/28/2021] [Indexed: 05/14/2023]
Abstract
Highly oriented, layered, and mechanically resilient films of polydopamine (PDA) have been synthesized from the air/water interface. The films show a unique layered structure, as shown by scanning and transmission electron studies (SEM/TEM) and X-ray diffraction analysis (XRD), which resemble that of 2D layered materials. The films exhibit a composition typical of PDA-based materials, as evidenced by X-ray photoelectron spectroscopy (XPS); moreover, the samples present the distinctive resonance modes of PDA-based nanomaterials in Raman and infrared spectroscopy (FTIR) experiments. The presence of highly ordinated 3-4 protomolecule stacking, taking place at the air/water interface, with a unique eumelanin-like supramolecular arrangement is presented. Moreover, the films show superior mechanical resilience with E = 13 ± 4 GPa and H = 0.21 ± 0.03 GPa, as revealed by nanoindentation experiments, making them highly resilient and easily transferable. Finally, the ordering induced by the interface opens many possibilities for further studies, including those regarding the supramolecular structure on PDA due to their similarity to 2D layered materials.
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Affiliation(s)
- Emerson Coy
- NanoBioMedical
Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
| | - Igor Iatsunskyi
- NanoBioMedical
Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
| | - Juan Carlos Colmenares
- Institute
of Physical Chemistry, Polish Academy of
Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Yeonho Kim
- Research
Institute of Basic Sciences, Incheon National
University, Incheon 22012, Republic of Korea
| | - Radosław Mrówczyński
- Faculty
of Chemistry, Adam Mickiewicz University, ul. Uniwersytet Poznańskiego
8, 61-614 Poznań, Poland
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9
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Fredi G, Simon F, Sychev D, Melnyk I, Janke A, Scheffler C, Zimmerer C. Bioinspired Polydopamine Coating as an Adhesion Enhancer Between Paraffin Microcapsules and an Epoxy Matrix. ACS OMEGA 2020; 5:19639-19653. [PMID: 32803059 PMCID: PMC7424712 DOI: 10.1021/acsomega.0c02271] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 07/15/2020] [Indexed: 05/26/2023]
Abstract
Microencapsulated phase change materials (PCMs) are attracting increasing attention as functional fillers in polymer matrices, to produce smart thermoregulating composites for applications in thermal energy storage (TES) and thermal management. In a polymer composite, the filler-matrix interfacial adhesion plays a fundamental role in the thermomechanical properties. Hence, this work aims to modify the surface of commercial PCM microcapsules through the formation of a layer of polydopamine (PDA), a bioinspired polymer that is emerging as a powerful tool to functionalize chemically inert surfaces due to its versatility and great adhesive potential in many different materials. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) evidenced that after PDA coating, the surface roughness increased from 9 to 86 nm, which is beneficial, as it allows a further increase in the interfacial interaction by mechanical interlocking. Spectroscopic techniques allowed investigating the surface chemistry and identifying reactive functional groups of the PDA layer and highlighted that, unlike the uncoated microcapsules, the PDA layer is able to react with oxirane groups, thereby forming a covalent bond with the epoxy matrix. Hot-stage optical microscopy and differential scanning calorimetry (DSC) highlighted that the PDA modification does not hinder the melting/crystallization process of the paraffinic core. Finally, SEM micrographs of the cryofracture surface of epoxy composites containing neat or PDA-modified microcapsules clearly evidenced improved adhesion between the capsule shell and the epoxy matrix. These results showed that PDA is a suitable coating material with considerable potential for increasing the interfacial adhesion between an epoxy matrix and polymer microcapsules with low surface reactivity. This is remarkably important not only for this specific application but also for other classes of composite materials. Future studies will investigate how the deposition parameters affect the morphology, roughness, and thickness of the PDA layer and how the layer properties influence the capsule-matrix adhesion.
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Affiliation(s)
- Giulia Fredi
- Department
of Industrial Engineering, University of
Trento, Via Sommarive 9, I-38123 Trento, Italy
| | - Frank Simon
- Leibniz-Institut
für Polymerforschung, Hohe Straße 6, D-01069 Dresden, Germany
| | - Dmitrii Sychev
- Leibniz-Institut
für Polymerforschung, Hohe Straße 6, D-01069 Dresden, Germany
| | - Inga Melnyk
- Leibniz-Institut
für Polymerforschung, Hohe Straße 6, D-01069 Dresden, Germany
| | - Andreas Janke
- Leibniz-Institut
für Polymerforschung, Hohe Straße 6, D-01069 Dresden, Germany
| | - Christina Scheffler
- Leibniz-Institut
für Polymerforschung, Hohe Straße 6, D-01069 Dresden, Germany
| | - Cordelia Zimmerer
- Leibniz-Institut
für Polymerforschung, Hohe Straße 6, D-01069 Dresden, Germany
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10
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Pinheiro FL, Prado G, Ito S, Simon JD, Wakamatsu K, Anelli LE, Andrade JAF, Glass K. Chemical characterization of pterosaur melanin challenges color inferences in extinct animals. Sci Rep 2019; 9:15947. [PMID: 31685890 PMCID: PMC6828676 DOI: 10.1038/s41598-019-52318-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 10/11/2019] [Indexed: 12/18/2022] Open
Abstract
Melanosomes (melanin-bearing organelles) are common in the fossil record occurring as dense packs of globular microbodies. The organic component comprising the melanosome, melanin, is often preserved in fossils, allowing identification of the chemical nature of the constituent pigment. In present-day vertebrates, melanosome morphology correlates with their pigment content in selected melanin-containing structures, and this interdependency is employed in the color reconstruction of extinct animals. The lack of analyses integrating the morphology of fossil melanosomes with the chemical identification of pigments, however, makes these inferences tentative. Here, we chemically characterize the melanin content of the soft tissue headcrest of the pterosaur Tupandactylus imperator by alkaline hydrogen peroxide oxidation followed by high-performance liquid chromatography. Our results demonstrate the unequivocal presence of eumelanin in T. imperator headcrest. Scanning electron microscopy followed by statistical analyses, however, reveal that preserved melanosomes containing eumelanin are undistinguishable to pheomelanin-bearing organelles of extant vertebrates. Based on these new findings, straightforward color inferences based on melanosome morphology may not be valid for all fossil vertebrates, and color reconstructions based on ultrastructure alone should be regarded with caution.
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Affiliation(s)
- Felipe L Pinheiro
- Laboratório de Paleobiologia, Universidade Federal do Pampa, São Gabriel, 97300-162, Brazil.
| | - Gustavo Prado
- Instituto de Geociências, Universidade de São Paulo, São Paulo, Brazil.
| | - Shosuke Ito
- Department of Chemistry, Fujita Health University School of Medical Sciences, Toyoake, Aichi, 470-1192, Japan
| | | | - Kazumasa Wakamatsu
- Department of Chemistry, Fujita Health University School of Medical Sciences, Toyoake, Aichi, 470-1192, Japan
| | - Luiz E Anelli
- Instituto de Geociências, Universidade de São Paulo, São Paulo, Brazil
| | - José A F Andrade
- Centro de Pesquisas Paleontológicas da Chapada do Araripe, Departamento Nacional de Produção Mineral, 63100-440, Crato, Brazil
| | - Keely Glass
- Department of Chemistry, Duke University, Durham, NC, 27708, USA
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11
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Silva DJD, Wiebeck H. Predicting LDPE/HDPE blend composition by CARS-PLS regression and confocal Raman spectroscopy. POLIMEROS 2019. [DOI: 10.1590/0104-1428.00218] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Srisuk P, Bishi DK, Berti FV, Silva CJR, Kwon IK, Correlo VM, Reis RL. Eumelanin Nanoparticle-Incorporated Polyvinyl Alcohol Nanofibrous Composite as an Electroconductive Scaffold for Skeletal Muscle Tissue Engineering. ACS APPLIED BIO MATERIALS 2018; 1:1893-1905. [DOI: 10.1021/acsabm.8b00465] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Pathomthat Srisuk
- 3B’s Research Group, I3Bs, Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga 4805-017, Portugal
- Division of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Khon Kaen University, 123 Mittraphab Highway, Mueang
District, Khon Kaen 40002, Thailand
| | - Dillip K. Bishi
- 3B’s Research Group, I3Bs, Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga 4805-017, Portugal
| | - Fernanda V. Berti
- 3B’s Research Group, I3Bs, Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga 4805-017, Portugal
- Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Santa Catarina 88040, Brazil
| | - Carlos J. R. Silva
- Department/Center of Chemistry, Universidade do Minho, Braga 4710-057, Portugal
| | - Il Keun Kwon
- Department of Dental Materials, School of Dentistry, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02477, Republic of Korea
| | - Vitor M. Correlo
- 3B’s Research Group, I3Bs, Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga 4805-017, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Barco, Guimarães 4805-017, Portugal
| | - Rui L. Reis
- 3B’s Research Group, I3Bs, Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga 4805-017, Portugal
- Department of Dental Materials, School of Dentistry, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02477, Republic of Korea
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Barco, Guimarães 4805-017, Portugal
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Chen D, Mei Y, Hu W, Li CM. Electrochemically enhanced antibody immobilization on polydopamine thin film for sensitive surface plasmon resonance immunoassay. Talanta 2018; 182:470-475. [DOI: 10.1016/j.talanta.2018.02.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/02/2018] [Accepted: 02/08/2018] [Indexed: 12/31/2022]
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14
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da Silva DJ, Wiebeck H. CARS-PLS regression and ATR-FTIR spectroscopy for eco-friendly and fast composition analyses of LDPE/HDPE blends. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1507-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Bonavolontà C, Lisio CD, d'Ischia M, Maddalena P, Manini P, Pezzella A, Valentino M. Anomalous evolution of broadband optical absorption reveals dynamic solid state reorganization during eumelanin build-up in thin films. Sci Rep 2017; 7:522. [PMID: 28364123 PMCID: PMC5428701 DOI: 10.1038/s41598-017-00597-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 03/07/2017] [Indexed: 11/29/2022] Open
Abstract
The origin of eumelanin optical properties remains a formidable conundrum preventing a detailed understanding of the complex photo-protective role of these widespread natural pigments and the rational design of innovative bioinspired materials for optoelectronic applications. Here we report the unusual kinetic and thickness-dependent evolution of the optical properties of black eumelanin polymers generated by spontaneous aerial polymerization of 5,6-dihydroxyindole (DHI) thin films (0.1-1 μm), consistent with peculiar solid state reorganization mechanisms governing broadband absorption. The complete reversal of eumelanin UV-visible transmittance spectrum curvature on passing from 0.2 to 0.5 μm thick films, the marked increase in visible extinction coefficients with increasing film thickness and the higher UV extinction coefficients in slowly vs. rapidly generated polymers concur to support distinct dynamic regimes of solid-state molecular reorganization at the nanoscale level and to do affect the development of broadband visible absorption. Solid state control of molecular reorganization disclosed herein may delineate new rational strategies for tuning optical properties in eumelanin thin films for optoelectronic applications.
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Affiliation(s)
- Carmela Bonavolontà
- Department of Physics "E. Pancini", University of Naples "Federico II", Via Cintia, I-80126, Napoli, Italy.
- INFN, Sezione di Napoli, Via Cintia, 80126, Napoli, Italy.
| | - Corrado de Lisio
- Department of Physics "E. Pancini", University of Naples "Federico II", Via Cintia, I-80126, Napoli, Italy
- CNR-SPIN U.O.S. di Napoli, Via Cintia, 80126, Napoli, Italy
| | - Marco d'Ischia
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, I-80126, Napoli, Italy
| | - Pasqualino Maddalena
- Department of Physics "E. Pancini", University of Naples "Federico II", Via Cintia, I-80126, Napoli, Italy
| | - Paola Manini
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, I-80126, Napoli, Italy
| | - Alessandro Pezzella
- INFN, Sezione di Napoli, Via Cintia, 80126, Napoli, Italy.
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, I-80126, Napoli, Italy.
- Institute for Polymers, Composites and Biomaterials (IPCB), CNR, Via Campi Flegrei 34, 80078, Pozzuoli (Na), Italy.
| | - Massimo Valentino
- INFN, Sezione di Napoli, Via Cintia, 80126, Napoli, Italy
- CNR-SPIN U.O.S. di Napoli, Via Cintia, 80126, Napoli, Italy
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16
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Ambrico M. SPECIAL ISSUE: Melanin, a long lasting history bridging natural pigments and organic bioelectronics. POLYM INT 2016. [DOI: 10.1002/pi.5239] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Feng J, Fan H, Zha DA, Wang L, Jin Z. Characterizations of the Formation of Polydopamine-Coated Halloysite Nanotubes in Various pH Environments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10377-10386. [PMID: 27643526 DOI: 10.1021/acs.langmuir.6b02948] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Recent studies demonstrated that polydopamine (PDA) coating is universal to nearly all substrates, and it endows substrates with biocompatibility, postfunctionality, and other useful properties. Surface chemistry of PDA coating is important for its postmodifications and applications. However, there is less understanding of the formation mechanism and surface functional groups of PDA layers generated in different conditions. Halloysite is a kind of clay mineral with tubular nanostructure. Water-swellable halloysite has unique reactivity. In this study, we have investigated the reaction of dopamine in the presence of water-swellable halloysite. We have tracked the reaction progresses in different pH environments by using UV-vis spectroscopy and surface-enhanced Raman spectroscopy (SERS). The surface properties of PDA on halloysite were clarified by X-ray photoelectron spectroscopy (XPS), SERS, Fourier transform infrared (FTIR) characterizations, zeta potential, surface wettability, and morphological characterizations. We noticed that the interaction between halloysite surface and dopamine strongly influences the surface functionality of coated PDA. In addition, pH condition further modulates surface functional groups, resulting in less content of secondary/aromatic amine in PDA generated in weak acidic environment. This study demonstrates that the formation mechanism of polydopamine becomes complex in the presence of inorganic nanomaterials. Substrate property and reaction condition dominate the functionality of obtained PDA together.
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Affiliation(s)
- Junran Feng
- Department of Chemistry, Renmin University of China , 100872 Beijing, People's Republic of China
| | - Hailong Fan
- Department of Chemistry, Renmin University of China , 100872 Beijing, People's Republic of China
| | - Dao-An Zha
- School of Science, Beijing Jiaotong University , No. 3 Shang Yuan Cun, Haidian District, Beijing 100044, People's Republic of China
| | - Le Wang
- Department of Chemistry, Renmin University of China , 100872 Beijing, People's Republic of China
| | - Zhaoxia Jin
- Department of Chemistry, Renmin University of China , 100872 Beijing, People's Republic of China
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