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Herget K, Frerichs H, Pfitzner F, Tahir MN, Tremel W. Functional Enzyme Mimics for Oxidative Halogenation Reactions that Combat Biofilm Formation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1707073. [PMID: 29920781 DOI: 10.1002/adma.201707073] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/18/2018] [Indexed: 06/08/2023]
Abstract
Transition-metal oxide nanoparticles and molecular coordination compounds are highlighted as functional mimics of halogenating enzymes. These enzymes are involved in halometabolite biosynthesis. Their activity is based upon the formation of hypohalous acids from halides and hydrogen peroxide or oxygen, which form bioactive secondary metabolites of microbial origin with strong antibacterial and antifungal activities in follow-up reactions. Therefore, enzyme mimics and halogenating enzymes may be valuable tools to combat biofilm formation. Here, halogenating enzyme models are briefly described, enzyme mimics are classified according to their catalytic functions, and current knowledge about the settlement chemistry and adhesion of fouling organisms is summarized. Enzyme mimics with the highest potential are showcased. They may find application in antifouling coatings, indoor and outdoor paints, polymer membranes for water desalination, or in aquacultures, but also on surfaces for food packaging, door handles, hand rails, push buttons, keyboards, and other elements made of plastic where biofilms are present. The use of natural compounds, formed in situ with nontoxic and abundant metal oxide enzyme mimics, represents a novel and efficient "green" strategy to emulate and utilize a natural defense system for preventing bacterial colonization and biofilm growth.
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Affiliation(s)
- Karoline Herget
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Hajo Frerichs
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Felix Pfitzner
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Muhammad Nawaz Tahir
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
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Coombs SG, Khodjaniyazova S, Bright FV. Exploiting the 3-Aminopropyltriethoxysilane (APTES) autocatalytic nature to create bioconjugated microarrays on hydrogen-passivated porous silicon. Talanta 2018; 177:26-33. [DOI: 10.1016/j.talanta.2017.09.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 09/12/2017] [Accepted: 09/13/2017] [Indexed: 10/18/2022]
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Destino JF, Craft AK, Bright FV. Three-Dimensional pH Mapping within Model Hybrid Xerogel Thin Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:4119-4128. [PMID: 28388846 DOI: 10.1021/acs.langmuir.6b04518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
When xerogel films derived from carboxyethylsilanetriol (COE) and tetraethoxysilane (TEOS) or 3-aminopropyltriethoxysilane (APTES), n-octyltriethoxysilane (C8), and TEOS are formed on Al2O3 they exhibit chemically segregated domains with unique chemistries and topographies. These characteristics are important for marine antifouling. By using the ratiometric fluorescent probe 5 (and 6)-carboxy SNARF-1 (C.SNARF-1) in concert with confocal fluorescence microscopy, we determine the pH in three dimensions within these hybrid films. For the COE/TEOS film, 4-5 μm diameter dendritically shaped features form, and they extend ∼100 nm above the film base. These dendritic features are acidic (pH < 7) in comparison to the film base. Their average diameter decreases as we progress from the solution-film interface toward the film-Al2O3 interface. Planes located at the solution-film interface, film center, and film-Al2O3 interface exhibit acidic surface areas that are 20% below, 50% above, and 70% below the average COE mole fraction used to create the film. In the APTES/C8/TEOS films, 1-3 μm diameter mesa-shaped features form, and they extend up to 450 nm above the film base. These mesa features are basic (pH > 7) in comparison to the film base and are columnar in shape, extending without change in diameter throughout the entire film. From the solution-film interface the planes located within the first 3/4 of the film exhibit basic surface areas that are equivalent to the average APTES mole fraction used to create the film. However, as one approaches the film-Al2O3 interface, many new 100-200 nm basic subsurface regions appear. The basic surface area in those film planes within 400-500 nm of the film-Al2O3 interface are enriched in APTES by up to 500% above the average APTES mole fraction used to create the film.
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Affiliation(s)
- Joel F Destino
- Department of Chemistry, Natural Sciences Complex, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
| | - Andrew K Craft
- Department of Chemistry, Natural Sciences Complex, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
| | - Frank V Bright
- Department of Chemistry, Natural Sciences Complex, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
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Kirillova A, Marschelke C, Friedrichs J, Werner C, Synytska A. Hybrid Hairy Janus Particles as Building Blocks for Antibiofouling Surfaces. ACS APPLIED MATERIALS & INTERFACES 2016; 8:32591-32603. [PMID: 27933847 DOI: 10.1021/acsami.6b10588] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Herein, we report a new strategy for the design of antifouling surfaces by using hybrid hairy Janus particles. The amphiphilic Janus particles possess either a spherical or a plateletlike shape and have core-shell structures with an inorganic core and hydrophilic/hydrophobic polymeric shells. Subsequently, these bifunctional Janus particles enable the fabrication of surfaces with modularity in chemical composition and final surface topography, which possess antifouling properties. The antifouling and fouling-release capability of the composite Janus particle-based surfaces is investigated using the marine biofilm-forming bacteria Cobetia marina. The Janus particle-based coatings are robust and significantly reduce bacterial retention under both static and dynamic conditions independent of the particle geometry. The plateletlike (kaolinite-based) Janus particles represent a scalable system for the rational design of antifouling coatings as well as their large-scale production and application in the future.
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Affiliation(s)
- Alina Kirillova
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Strasse 6, 01069 Dresden, Germany
- Technische Universität Dresden , Fakultät Mathematik und Naturwissenschaften, 01062 Dresden, Germany
| | - Claudia Marschelke
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Strasse 6, 01069 Dresden, Germany
- Technische Universität Dresden , Fakultät Mathematik und Naturwissenschaften, 01062 Dresden, Germany
| | - Jens Friedrichs
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Strasse 6, 01069 Dresden, Germany
- Technische Universität Dresden , Fakultät Mathematik und Naturwissenschaften, 01062 Dresden, Germany
| | - Carsten Werner
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Strasse 6, 01069 Dresden, Germany
- Technische Universität Dresden , Fakultät Mathematik und Naturwissenschaften, 01062 Dresden, Germany
| | - Alla Synytska
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Strasse 6, 01069 Dresden, Germany
- Technische Universität Dresden , Fakultät Mathematik und Naturwissenschaften, 01062 Dresden, Germany
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Destino JF, Jones ZR, Gatley CM, Zhang Y, Craft AK, Detty MR, Bright FV. Hybrid Sol-Gel-Derived Films That Spontaneously Form Complex Surface Topographies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10113-10119. [PMID: 27607195 DOI: 10.1021/acs.langmuir.6b02664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Surface patterns over multiple length scales are known to influence various biological processes. Here we report the synthesis and characterization of new, two-component xerogel thin films derived from carboxyethylsilanetriol (COE) and tetraethoxysilane (TEOS). Atomic force microscopy (AFM) reveals films surface with branched and hyper branched architectures that are ∼2 to 30 μm in diameter, that extend ∼3 to 1300 nm above the film base plane with surface densities that range from 2 to 77% surface area coverage. Colocalized AFM and Raman spectroscopy show that these branched structures are COE-rich domains, which are slightly stiffer (as shown from phase AFM imaging) and exhibit lower capacitive force in comparison with film base plane. Raman mapping reveals there are also discrete domains (≤300 nm in diameter) that are rich in COE dimers and densified TEOS, which do not appear to correspond with any surface structure seen by AFM.
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Affiliation(s)
- Joel F Destino
- Department of Chemistry, Natural Sciences Complex , SUNY-Buffalo, Buffalo, New York 14260-3000, United States
| | - Zachary R Jones
- Department of Chemistry, Ithaca College , Ithaca, New York 14850, United States
| | - Caitlyn M Gatley
- Department of Chemistry, Natural Sciences Complex , SUNY-Buffalo, Buffalo, New York 14260-3000, United States
| | - Yi Zhang
- Department of Chemistry, Natural Sciences Complex , SUNY-Buffalo, Buffalo, New York 14260-3000, United States
| | - Andrew K Craft
- Department of Chemistry, Natural Sciences Complex , SUNY-Buffalo, Buffalo, New York 14260-3000, United States
| | - Michael R Detty
- Department of Chemistry, Natural Sciences Complex , SUNY-Buffalo, Buffalo, New York 14260-3000, United States
| | - Frank V Bright
- Department of Chemistry, Natural Sciences Complex , SUNY-Buffalo, Buffalo, New York 14260-3000, United States
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Leng C, Sun S, Zhang K, Jiang S, Chen Z. Molecular level studies on interfacial hydration of zwitterionic and other antifouling polymers in situ. Acta Biomater 2016; 40:6-15. [PMID: 26923530 DOI: 10.1016/j.actbio.2016.02.030] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 01/19/2016] [Accepted: 02/22/2016] [Indexed: 12/16/2022]
Abstract
UNLABELLED Antifouling polymers have wide applications in biomedical engineering and marine industry. Recently, zwitterionic materials have been reported as promising candidates for antifouling applications, while strong hydration is believed to be the key antifouling mechanism. Zwitterionic materials can be designed with various molecular structures, which affect their hydration and antifouling performance. Although strong hydration has been proposed to occur at the material surfaces, probing the solid material/water interfaces is challenging with traditional analytical techniques. Here in this review, we will review our studies on surface hydration of zwitterionic materials and other antifouling materials by using sum frequency generation (SFG) vibrational spectroscopy, which provides molecular understanding of the water structures at various material surfaces. The materials studied include zwitterionic polymer brushes with different molecular structures, amphiphilic polymers with zwitterionic groups, uncharged hydrophilic polymer brushes, amphiphilic polypeptoids, and widely used antifouling material poly(ethylene glycol). We will compare the differences among zwitterionic materials with various molecular structures as well as the differences between antifouling materials and fouling surfaces of control samples. We will also discuss the effects of pH and biological molecules like proteins on the surface hydration of the zwitterionic materials. Using SFG spectroscopy, we have measured the hydration layers of antifouling materials and found that strong hydrogen bonds are key to the formation of strong hydration layers preventing protein fouling at the polymer interfaces. STATEMENT OF SIGNIFICANCE Antifouling polymers have wide applications in biomedical engineering and marine industry. Recently, zwitterionic materials have been reported as promising candidates for antifouling applications, while strong hydration is believed to be the key antifouling mechanism. However, zwitterionic materials can be designed with various molecular structures, which affect their hydration and antifouling performance. Moreover, although strong hydration has been proposed to occur at the material surfaces, probing the solid material/water interfaces is challenging with traditional analytical techniques. Here in this manuscript, we will review our studies on surface hydration of zwitterionic materials and other antifouling materials by using sum frequency generation (SFG) vibrational spectroscopy, which provides molecular understanding of the water structures at various material surfaces. The materials studied include zwitterionic polymer brushes with different molecular structures, amphiphilic polymers with zwitterionic groups, uncharged hydrophilic polymer brushes, amphiphilic polypeptoids, and widely used antifouling material poly(ethylene glycol). We will compare the differences among zwitterionic materials with various molecular structures as well as the differences between antifouling materials and fouling surfaces of control samples. We will also discuss the effects of pH and biological molecules like proteins on the surface hydration of the zwitterionic materials. All the SFG results indicate that strongly hydrogen-bonded water at the materials' surfaces (strong surface hydration) is closely correlated to the good antifouling properties of the materials. This review will be widely interested by readers of Acta Biomaterialia and will impact many different research fields in chemistry, materials, engineering, and beyond.
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