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Ozaki M, Imai T, Tsuruoka T, Sakashita S, Tomizaki KY, Usui K. Elemental composition control of gold-titania nanocomposites by site-specific mineralization using artificial peptides and DNA. Commun Chem 2021; 4:1. [PMID: 36697560 PMCID: PMC9814042 DOI: 10.1038/s42004-020-00440-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 12/01/2020] [Indexed: 01/28/2023] Open
Abstract
Biomineralization, the precipitation of various inorganic compounds in biological systems, can be regulated in terms of the size, morphology, and crystal structure of these compounds by biomolecules such as proteins and peptides. However, it is difficult to construct complex inorganic nanostructures because they precipitate randomly in solution. Here, we report that the elemental composition of inorganic nanocomposites can be controlled by site-specific mineralization by changing the number of two inorganic-precipitating peptides bound to DNA. With a focus on gold and titania, we constructed a gold-titania photocatalyst that responds to visible light excitation. Both microscale and macroscale observations revealed that the elemental composition of this gold-titania nanocomposite can be controlled in several ten nm by changing the DNA length and the number of peptide binding sites on the DNA. Furthermore, photocatalytic activity and cell death induction effect under visible light (>450 nm) irradiation of the manufactured gold-titania nanocomposite was higher than that of commercial gold-titania and titania. Thus, we have succeeded in forming titania precipitates on a DNA terminus and gold precipitates site-specifically on double-stranded DNA as intended. Such nanometer-scale control of biomineralization represent a powerful and efficient tool for use in nanotechnology, electronics, ecology, medical science, and biotechnology.
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Affiliation(s)
- Makoto Ozaki
- grid.258669.60000 0000 8565 5938Faculty of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047 Japan
| | - Takahito Imai
- grid.440926.d0000 0001 0744 5780Department of Materials Chemistry, Ryukoku University, 1-5 Yokotani, Seta Oe-cho, 520-2194 Otsu, Japan
| | - Takaaki Tsuruoka
- grid.258669.60000 0000 8565 5938Faculty of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047 Japan
| | - Shungo Sakashita
- grid.258669.60000 0000 8565 5938Faculty of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047 Japan
| | - Kin-ya Tomizaki
- grid.440926.d0000 0001 0744 5780Department of Materials Chemistry, Ryukoku University, 1-5 Yokotani, Seta Oe-cho, 520-2194 Otsu, Japan ,grid.440926.d0000 0001 0744 5780Department of Materials Chemistry and Innovative Materials and Processing Research Center, Ryukoku University, 1-5 Yokotani, Seta Oe-cho, 520-2194 Otsu, Japan
| | - Kenji Usui
- grid.258669.60000 0000 8565 5938Faculty of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047 Japan
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2
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Moonitz SA, Shepard N, Noriega R. Multimodal spectroscopic investigation of the conformation and local environment of biomolecules at an electrified interface. J Mater Chem B 2020; 8:7024-7030. [PMID: 32716450 DOI: 10.1039/d0tb01158d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The complex and dynamic interfacial regions between biological samples and electronic components pose many challenges for characterization, including their evolution over multiple temporal and spatial scales. Spectroscopic probes of buried interfaces employing mid-infrared plasmon resonances and time-resolved fluorescence detection in the visible range are used to study the properties of polypeptides adsorbed at the surface of a working electrode. Information from these complementary spectroscopic probes reveals the interplay of solvation, electric fields, and ion concentration on their resulting macromolecular conformations.
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Affiliation(s)
- Sasha A Moonitz
- University of Utah, Department of Chemistry, 315 S. 1400 E, Salt Lake City, UT 84112, USA.
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3
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Ozaki M, Yoshida S, Oura M, Tsuruoka T, Usui K. Effect of tryptophan residues on gold mineralization by a gold reducing peptide. RSC Adv 2020; 10:40461-40466. [PMID: 35520858 PMCID: PMC9057565 DOI: 10.1039/d0ra07098j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 10/17/2020] [Indexed: 11/21/2022] Open
Abstract
AuBP1, obtained by phage display selection, was previously shown to produce gold nanoparticles without reducing agents. The tryptophan (Trp) residue located at the N-terminus of this peptide contributes to the reduction of Au3+ to Au0 and is involved in the nucleation and crystal growth of gold nanoparticles. However, clear guidelines for relationships between the number of Trp residues in the peptide and its gold reducing ability have not been established. We focused on gold mineralization and attempted to elucidate aspects of the underlying mechanism. We performed a detailed evaluation of the effects of modifying the N-terminus of the core sequence on gold mineralization without reducing agents. Besides, advantages of utilizing peptides in manufacturing gold nanoparticles are shown. UV-Vis measurements, TEM observations, and kinetic analyses were used to show that increasing the number of Trp residues in the peptide increases the reducing ability, causing predominance of the nucleation reaction and the production of small gold nanoparticles. In addition, these peptides also had the ability as a dispersant to protect the surface of gold nanoparticles. Furthermore, the catalytic activity of mineralized gold nanoparticles with peptides was higher than that of a commercial gold nanoparticle. This study should help to elucidate the relationship between peptide sequence and mineralization ability for use in materials chemistry. Increasing the number of tryptophan (Trp) in peptides led to higher gold reducing ability and the peptides could disperse the generated gold-nanoparticles.![]()
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Affiliation(s)
- Makoto Ozaki
- Faculty of Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe
- Japan
| | - Shuhei Yoshida
- Faculty of Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe
- Japan
| | - Maho Oura
- Faculty of Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe
- Japan
| | - Takaaki Tsuruoka
- Faculty of Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe
- Japan
| | - Kenji Usui
- Faculty of Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe
- Japan
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4
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Buckle EL, Lum JS, Roehrich AM, Stote RE, Vandermoon B, Dracinsky M, Filocamo SF, Drobny GP. Serine-Lysine Peptides as Mediators for the Production of Titanium Dioxide: Investigating the Effects of Primary and Secondary Structures Using Solid-State NMR Spectroscopy and DFT Calculations. J Phys Chem B 2018; 122:4708-4718. [PMID: 29595262 DOI: 10.1021/acs.jpcb.8b00745] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A biomimetic approach to the formation of titania (TiO2) nanostructures is desirable because of the mild conditions required in this form of production. We have identified a series of serine-lysine peptides as candidates for the biomimetic production of TiO2 nanostructures. We have assayed these peptides for TiO2-precipitating activity upon exposure to titanium bis(ammonium lactato)dihydroxide and have characterized the resulting coprecipitates using scanning electron microscopy. A subset of these assayed peptides efficiently facilitates the production of TiO2 nanospheres. Here, we investigate the process of TiO2 nanosphere formation mediated by the S-K peptides KSSKK- and SKSK3SKS using one-dimensional and two-dimensional solid-state NMR (ssNMR) on peptide samples with uniformly 13C-enriched residues. ssNMR is used to assign 13C chemical shifts (CSs) site-specifically in each free peptide and TiO2-embedded peptide, which are used to derive secondary structures in the neat and TiO2 coprecipitated states. The backbone 13C CSs are used to assess secondary structural changes undergone during the coprecipitation process. Side-chain 13C CS changes are analyzed with density functional theory calculations and used to determine side-chain conformational changes that occur upon coprecipitation with TiO2 and to determine surface orientation of lysine side chains in TiO2-peptide composites.
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Affiliation(s)
- Erika L Buckle
- Department of Chemistry , University of Washington , Box 351700 , Seattle , Washington 98195 , United States
| | - June S Lum
- Biological Sciences and Technology Team , US Army Natick Soldier Research, Development and Engineering Center , Natick , Massachusetts 01760 , United States
| | - Adrienne M Roehrich
- Department of Chemistry , University of Washington , Box 351700 , Seattle , Washington 98195 , United States
| | - Robert E Stote
- Biological Sciences and Technology Team , US Army Natick Soldier Research, Development and Engineering Center , Natick , Massachusetts 01760 , United States
| | - Branden Vandermoon
- Department of Chemistry , University of Washington , Box 351700 , Seattle , Washington 98195 , United States
| | - Martin Dracinsky
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo 2 , 16610 Prague , Czech Republic
| | - Shaun F Filocamo
- Biological Sciences and Technology Team , US Army Natick Soldier Research, Development and Engineering Center , Natick , Massachusetts 01760 , United States
| | - Gary P Drobny
- Department of Chemistry , University of Washington , Box 351700 , Seattle , Washington 98195 , United States
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5
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Gunasekera B, Abou Diwan C, Altawallbeh G, Kalil H, Maher S, Xu S, Bayachou M. Functional Layer-by-Layer Thin Films of Inducible Nitric Oxide (NO) Synthase Oxygenase and Polyethylenimine: Modulation of Enzyme Loading and NO-Release Activity. ACS APPLIED MATERIALS & INTERFACES 2018; 10:7745-7755. [PMID: 29359547 DOI: 10.1021/acsami.7b17575] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nitric oxide (NO) release counteracts platelet aggregation and prevents the thrombosis cascade in the inner walls of blood vessels. NO-release coatings also prevent thrombus formation on the surface of blood-contacting medical devices. Our previous work has shown that inducible nitric oxide synthase (iNOS) films release NO fluxes upon enzymatic conversion of the substrate l-arginine. In this work, we report on the modulation of enzyme loading in layer-by-layer (LbL) thin films of inducible nitric oxide synthase oxygenase (iNOSoxy) on polyethylenimine (PEI). The layer of iNOSoxy is electrostatically adsorbed onto the PEI layer. The pH of the iNOSoxy solution affects the amount of enzyme adsorbed. The overall negative surface charge of iNOSoxy in solution depends on the pH and hence determines the density of adsorbed protein on the positively charged PEI layer. We used buffered iNOSoxy solutions adjusted to pHs 8.6 and 7.0, while saline PEI solution was used at pH 7.0. Atomic force microscopy imaging of the outermost layer shows higher protein adsorption with iNOSoxy at pH 8.6 than with a solution of iNOSoxy at pH 7.0. Graphite electrodes with PEI/iNOSoxy films show higher catalytic currents for nitric oxide reduction mediated by iNOSoxy. The higher enzyme loading translates into higher NO flux when the enzyme-modified surface is exposed to a solution containing the substrate and a source of electrons. Spectrophotometric assays showed higher NO fluxes with iNOSoxy/PEI films built at pH 8.6 than with films built at pH 7.0. Fourier transform infrared analysis of iNOSoxy adsorbed on PEI at pH 8.6 and 7.0 shows structural differences of iNOSoxy in films, which explains the observed changes in enzymatic activity. Our findings show that pH provides a strategy to optimize the NOS loading and enzyme activity in NOS-based LbL thin films, which enables improved NO release with minimum layers of PEI/NOS.
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Affiliation(s)
- Bhagya Gunasekera
- Department of Chemistry , Cleveland State University , 2399 Euclid Avenue SR 397 , Cleveland , Ohio 44120 , United States
| | - Charbel Abou Diwan
- Department of Chemistry , Cleveland State University , 2399 Euclid Avenue SR 397 , Cleveland , Ohio 44120 , United States
| | - Ghaith Altawallbeh
- Department of Chemistry , Cleveland State University , 2399 Euclid Avenue SR 397 , Cleveland , Ohio 44120 , United States
| | - Haitham Kalil
- Department of Chemistry , Cleveland State University , 2399 Euclid Avenue SR 397 , Cleveland , Ohio 44120 , United States
| | - Shaimaa Maher
- Department of Chemistry , Cleveland State University , 2399 Euclid Avenue SR 397 , Cleveland , Ohio 44120 , United States
| | - Song Xu
- Keysight Technologies , 1400 Foutaingrove Parkway , Santa Rosa 95403 , California , United States
| | - Mekki Bayachou
- Department of Chemistry , Cleveland State University , 2399 Euclid Avenue SR 397 , Cleveland , Ohio 44120 , United States
- Department of Pathobiology , Lerner Research Institute , The Cleveland Clinic , Cleveland , Ohio 44106 , United States
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6
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Sprenger KG, Prakash A, Drobny G, Pfaendtner J. Investigating the Role of Phosphorylation in the Binding of Silaffin Peptide R5 to Silica with Molecular Dynamics Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:1199-1207. [PMID: 28981294 DOI: 10.1021/acs.langmuir.7b02868] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Biomimetic silica formation, a process that is largely driven by proteins, has garnered considerable interest in recent years due to its role in the development of new biotechnologies. However, much remains unknown of the molecular-scale mechanisms underlying the binding of proteins to biomineral surfaces such as silica, or even of the key residue-level interactions between such proteins and surfaces. In this study, we employ molecular dynamics (MD) simulations to study the binding of R5-a 19-residue segment of a native silaffin peptide used for in vitro silica formation-to a silica surface. The metadynamics enhanced sampling method is used to converge the binding behavior of R5 on silica at both neutral (pH 7.5) and acidic (pH 5) conditions. The results show fundamental differences in the mechanism of binding between the two cases, providing unique insight into the pH-dependent ability of R5 and native silaffin to precipitate silica. We also study the effect of phosphorylation of serine residues in R5 on both the binding free energy to silica and the interfacial conformation of the peptide. Results indicate that phosphorylation drastically decreases the binding free energy and changes the structure of silica-adsorbed R5 through the introduction of charge and steric repulsion. New mechanistic insights from this work could inform rational design of new biomaterials and biotechnologies.
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Affiliation(s)
- K G Sprenger
- Department of Chemical Engineering, University of Washington , Seattle, Washington 98105, United States
| | - Arushi Prakash
- Department of Chemical Engineering, University of Washington , Seattle, Washington 98105, United States
| | - Gary Drobny
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Jim Pfaendtner
- Department of Chemical Engineering, University of Washington , Seattle, Washington 98105, United States
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7
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Buckle EL, Roehrich A, Vandermoon B, Drobny GP. Comparative Study of Secondary Structure and Interactions of the R5 Peptide in Silicon Oxide and Titanium Oxide Coprecipitates Using Solid-State NMR Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10517-10524. [PMID: 28898103 PMCID: PMC6786483 DOI: 10.1021/acs.langmuir.7b01048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A biomimetic, peptide-mediated approach to inorganic nanostructure formation is of great interest as an alternative to industrial production methods. To investigate the role of peptide structure on silica (SiO2) and titania (TiO2) morphologies, we use the R5 peptide domain derived from the silaffin protein to produce uniform SiO2 and TiO2 nanostructures from the precursor silicic acid and titanium bis(ammonium lactato)dihydroxide, respectively. The resulting biosilica and biotitania nanostructures are characterized using scanning electron microscopy. To investigate the process of R5-mediated SiO2 and TiO2 formation, we carry out 1D and 2D solid-state NMR (ssNMR) studies on R5 samples with uniformly 13C- and 15N-labeled residues to determine the backbone and side-chain chemical shifts. 13C chemical shift data are in turn used to determine peptide backbone torsion angles and secondary structure for the R5 peptide neat, in silica, and in titania. We are thus able to assess the impact of the different mineral environments on peptide structure, and we can further elucidate from 13C chemical shifts change the degree to which various side chains are in close proximity to the mineral phases. These comparisons add to the understanding of the role of R5 and its structure in both SiO2 and TiO2 formation.
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Affiliation(s)
- Erika L Buckle
- Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195, United States
| | - Adrienne Roehrich
- Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195, United States
| | - Branden Vandermoon
- Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195, United States
| | - Gary P Drobny
- Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195, United States
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8
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Ping H, Xie H, Xiang M, Su BL, Wang Y, Zhang J, Zhang F, Fu Z. Confined-space synthesis of nanostructured anatase, directed by genetically engineered living organisms for lithium-ion batteries. Chem Sci 2016; 7:6330-6336. [PMID: 28567245 PMCID: PMC5450446 DOI: 10.1039/c6sc02311h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 07/14/2016] [Indexed: 01/18/2023] Open
Abstract
Biomineral formation processes in nature are temporally and spatially regulated under the functions of biomolecules in a confined space. It is potentially very productive to rationally design a mineralized system by taking into account confined space as well as biomolecules. The laboratory technique of "bacterial cell surface display" is an ideal platform to host catalytically active proteins in a three-dimensionally confined space. In the present study, aiming to regulate the synthesis of nanostructured TiO2 anatase, repeating segments of silaffin were displayed on Escherichia coli surfaces through genetic manipulation. The displayed protein electrostatically interacted with a titanium source and catalyzed the hydrolysis of titanium dioxide precursors through hydrogen bonding interactions on the cell surface. In the subsequent calcination process, the genetically modified cells not only served as a framework for producing rod-shaped TiO2 assembled by nanoparticles, but also provided a carbon source in situ. The size of nanoparticles was controlled by changing the number of tandem repeats of the protein segment. The as prepared TiO2 anatase exhibited unique characteristics including nanosized anatase crystals, mesoporous structure and carbon coating. When tested as the anode electrode of a lithium-ion battery, it showed excellent lithium storage performance. The carbon coated anatase anode shows a higher specific capacity of 207 mA h g-1 after 200 cycles at a current rate of 1C and an ultra-long cycling lifetime of 5000 cycles with an outstanding retention capacity of 149 mA h g-1 at a higher rate of 10C. This bioprocess-inspired approach may help broaden the scope and impact of nanosized biominerals.
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Affiliation(s)
- Hang Ping
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , 430070 , China .
| | - Hao Xie
- School of Chemistry , Chemical Engineering, and Life Science , Wuhan University of Technology , Wuhan , 430070 , China .
| | - Mingyu Xiang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , 430070 , China .
| | - Bao-Lian Su
- Laboratory of Inorganic Materials Chemistry , University of Namur , Namur , B-5000 , Belgium
| | - Yucheng Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , 430070 , China .
| | - Jinyong Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , 430070 , China .
| | - Fan Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , 430070 , China .
| | - Zhengyi Fu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , 430070 , China .
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9
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Zhang A, Xie H, Liu N, Chen BL, Ping H, Fu ZY, Su BL. Crystallization of calcium carbonate under the influences of casein and magnesium ions. RSC Adv 2016. [DOI: 10.1039/c6ra23556e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The significant morphological changes of calcium carbonate crystals were investigated and observed in the presence of casein and magnesium ions.
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Affiliation(s)
- Ao Zhang
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- China
| | - Hao Xie
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- China
| | - Nian Liu
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- China
| | - Bao-Li Chen
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- China
| | - Hang Ping
- Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Zheng-Yi Fu
- Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Bao-Lian Su
- Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
- Laboratory of Inorganic Materials Chemistry
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10
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Jantschke A, Koers E, Mance D, Weingarth M, Brunner E, Baldus M. Insight into the Supramolecular Architecture of Intact Diatom Biosilica from DNP-Supported Solid-State NMR Spectroscopy. Angew Chem Int Ed Engl 2015; 54:15069-73. [DOI: 10.1002/anie.201507327] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Indexed: 01/23/2023]
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11
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Jantschke A, Koers E, Mance D, Weingarth M, Brunner E, Baldus M. Einblick in die supramolekulare Architektur von intaktem Diatomeen-Biosilikat mithilfe DNP-verstärkter Festkörper-NMR-Spektroskopie. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Wang XL, Xie H, Su BL, Cheng YB, Xie JJ, Ping H, Wang MH, Zhang JY, Zhang F, Fu ZY. A bio-process inspired synthesis of vaterite (CaCO3), directed by a rationally designed multifunctional protein, ChiCaSifi. J Mater Chem B 2015; 3:5951-5956. [DOI: 10.1039/c5tb00650c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bio-process inspired synthesis of vaterite (CaCO3) is achieved under the functions of a rationally designed multifunctional protein, ChiCaSifi.
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Affiliation(s)
- X.-L. Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - H. Xie
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- China
| | - B.-L. Su
- Laboratory of Inorganic Materials Chemistry
- University of Namur
- B-5000 Namur
- Belgium
| | - Y.-B. Cheng
- Department of Materials Engineering
- Monash University
- Victoria 3800
- Australia
| | - J.-J. Xie
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - H. Ping
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - M.-H. Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - J.-Y. Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | | | - Z.-Y. Fu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
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13
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Lang Y, Finn DP, Caruso F, Pandit A. Fabrication of nanopatterned polymeric microparticles using a diatom as a sacrificial template. RSC Adv 2014. [DOI: 10.1039/c4ra06728b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Diatoms serve as sacrificial templates to fabricate polymeric microparticles with elaborate nano-scale architecture.
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Affiliation(s)
- Yvonne Lang
- Network of Excellence for Functional Biomaterials
- National University of Ireland
- Galway, Ireland
| | - David. P. Finn
- Pharmacology and Therapeutics
- School of Medicine and Centre for Pain Research
- National University of Ireland
- Galway, Ireland
| | - Frank Caruso
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Victoria 3010, Australia
| | - Abhay Pandit
- Network of Excellence for Functional Biomaterials
- National University of Ireland
- Galway, Ireland
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14
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Lang Y, del Monte F, Rodriguez BJ, Dockery P, Finn DP, Pandit A. Integration of TiO2 into the diatom Thalassiosira weissflogii during frustule synthesis. Sci Rep 2013; 3:3205. [PMID: 24220344 PMCID: PMC3826116 DOI: 10.1038/srep03205] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 10/25/2013] [Indexed: 11/10/2022] Open
Abstract
Nature has inspired the design of complex hierarchical structures in the field of material science. Diatoms, unicellular algae with a hallmark intricate siliceous cell wall, have provided such a stimulus. Altering the chemistry of the diatom frustule has been explored to expand on the potential application of diatoms. The ability to modify the diatom in vivo opens the possibility to tailor the diatom to the end application. Herein, we report the chemical modification of the living diatom T. weissflogii using a titania precursor, titanium (IV) bis-(ammonium lactato)-dihydroxide (TiBALDH). Incorporation of Ti into the diatom is achieved via repeated treatment of cultures with non-toxic concentrations of TiBALDH. The characteristic architectural features of the diatom are unaltered following chemical modification. Transformation of the living diatom provides opportunity to confer novel structural, chemical or functional properties upon the diatom. We report on a photocatalytic ability imparted upon the TiBALDH-modified diatom.
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Affiliation(s)
- Yvonne Lang
- 1] Network of Excellence for Functional Biomaterials [2] Pharmacology & Therapeutics, School of Medicine [3] Centre for Pain Research, National Centre for Biomedical Engineering Science National University of Ireland, Galway, Ireland
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15
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Pamirsky IE, Golokhvast KS. Silaffins of diatoms: from applied biotechnology to biomedicine. Mar Drugs 2013; 11:3155-67. [PMID: 24065158 PMCID: PMC3806462 DOI: 10.3390/md11093155] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 07/29/2013] [Accepted: 08/12/2013] [Indexed: 11/24/2022] Open
Abstract
Silaffins are involved in the formation of the cell walls of diatoms. It is known that silaffins can precipitate silica in vitro, forming nano- and micro-particles in the shape of spheres and plates containing many pores. It is important to note that the deposition of silica and the particle morphology in the presence of silaffins affects chemical and physical agents (e.g., peptides, polyamines, phosphate, nitrogen, and the mechanical changes of the reaction mixture). It is believed that silaffins act as an organic matrix for silica-genesis and that silica pore size should reflect the pattern of a matrix. Here, biotechnology related to silaffins is discussed in the context of “a hypothesis of silaffin matrix” and “the LCPA-phosphate model”. We discuss the most promising area of silaffin biotechnology—the development of production methods for silicon structures with desired shapes and nanostructural properties that can be used to create biocompatible materials.
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Affiliation(s)
- Igor E Pamirsky
- Analytical Center of Mineralogical and Geochemical Studies, Institute of Geology and Nature Management Far Eastern Branch, Russian Academy of Sciences, 1 Relochny Lane, Blagoveshchensk 675000, Russian Federation
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Puddu V, Slocik JM, Naik RR, Perry CC. Titania binding peptides as templates in the biomimetic synthesis of stable titania nanosols: insight into the role of buffers in peptide-mediated mineralization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9464-9472. [PMID: 23815089 DOI: 10.1021/la401777x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this Article, we report the unusual behavior of two peptides (Ti-1 (QPYLFATDSLIK) and Ti-2 (GHTHYHAVRTQT)) with high affinity for titania that efficiently promote titania mineralization from an aqueous titanium bisammonium lactatodihydroxide (TiBALDH) solution, yielding small (ca. 4 nm) titania nanoparticles. As a result, we were able to produce for the first time using a biomimetic approach highly stable sub-10-nm titania sols. Both sequences show a high titania mineralization activity per unit peptide concentration and a capacity to control particle size and stabilize nanoparticles through specific surface interactions. We also show that phosphate ions disrupt the controlled particle formation and stabilization achieved in the presence of the two peptides. The products obtained from phosphate buffered solutions are titanium-containing materials (not pure oxide) with poor morphological control similar to those previously reported by others. Our results provide important insights into understanding the mechanism of titania mineralization in a range of different aqueous media (water, Tris, and phosphate buffer).
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Affiliation(s)
- Valeria Puddu
- Interdisciplinary Biomedical Research Centre, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, United Kingdom
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André R, Natalio F, Tahir MN, Berger R, Tremel W. Self-cleaning antimicrobial surfaces by bio-enabled growth of SnO2 coatings on glass. NANOSCALE 2013; 5:3447-3456. [PMID: 23475228 DOI: 10.1039/c3nr00007a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Conventional vapor-deposition techniques for coatings require sophisticated equipment and/or high-temperature resistant substrates. Therefore bio-inspired techniques for the fabrication of inorganic coatings have been developed in recent years. Inspired by the biology behind the formation of the intricate skeletons of diatoms orchestrated by a class of cationic polyamines (silaffins) we have used surface-bound spermine, a naturally occurring polyamine, to promote the fast deposition of homogeneous, thin and transparent biomimetic SnO2 coatings on glass surfaces. The bio-enabled SnO2 film is highly photoactive, i.e. it generates superoxide radicals (O2˙(-)) upon sunlight exposure resulting in a strong degradation of organic contaminants and a strong antimicrobial activity. Upon illumination the biomimetic SnO2 coating exhibits a switchable amphiphilic behavior, which - in combination with its photoactivity - creates a self-cleaning surface. The intrinsic self-cleaning properties could lead to the development of new protective, antifouling coatings on various substrates.
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Affiliation(s)
- Rute André
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55099 Mainz, Germany
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Abstract
Polyelectrolyte multilayer films are a versatile functionalization method of surfaces and rely on the alternated adsorption of oppositely charged species. Among such species, charged dyes can also be alternated with oppositely charged polymers, which is challenging from a fundamental point of view, because polyelectrolytes require a minimal number of charges, whereas even monovalent dyes can be incorporated during the alternated adsorption process. We will not only focus on organic dyes but also on their inorganic counterparts and on metal complexes. Such films offer plenty of possible applications in dye sensitized solar cells. In addition, dyes are massively used in the textile industry and in histology to stain textile fibers or tissues. However, the excess of non bound dyes poses serious environmental problems. It is hence of the highest interest to design materials able to adsorb such dyes in an almost irreversible manner. Polyelectrolyte multilayer films, owing to their ion exchange behavior can be useful for such a task allowing for impressive overconcentration of dyes with respect to the dye in solution. The actual state of knowledge of the interactions between charged dyes and adsorbed polyelectrolytes is the focus of this review article.
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Affiliation(s)
- Vincent Ball
- Institut National de la Santé et de la Recherche Médicale, UMR 1121, 11 rue Humann, Strasbourg Cédex 67085, France; E-Mail: ; Tel.: +33-3-90-24-32-58; Fax: +33-3-90-24-33-79
- Faculté de Chirurgie Dentaire, Université de Strasbourg, 1 Place de l'Hôpital, Strasbourg 67000, France
- Fédération de Médecine Translationelle de Strasbourg, 1 Place de l'Hôpital, Strasbourg 67000, France
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Wallet B, Kharlampieva E, Campbell-Proszowska K, Kozlovskaya V, Malak S, Ankner JF, Kaplan DL, Tsukruk VV. Silk layering as studied with neutron reflectivity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:11481-9. [PMID: 22697306 DOI: 10.1021/la300916e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Neutron reflectivity (NR) measurements of ultrathin surface films (below 30 nm) composed of Bombyx mori silk fibroin protein in combination with atomic force microscopy and ellipsometry were used to reveal the internal structural organization in both dry and swollen states. Reconstituted aqueous silk solution deposited on a silicon substrate using the spin-assisted layer-by-layer (SA-LbL) technique resulted in a monolayer silk film composed of random nanofibrils with constant scattering length density (SLD). However, a vertically segregated ordering with two different regions has been observed in dry, thicker, seven-layer SA-LbL silk films. The vertical segregation of silk multilayer films indicates the presence of a different secondary structure of silk in direct contact with the silicon oxide surface (first 6 nm). The layered structure can be attributed to interfacial β-sheet crystallization and the formation of well-developed nanofibrillar nanoporous morphology for the initially deposited silk surface layers with the preservation of less dense, random coil secondary structure for the layers that follow. This segregated structure of solid silk films defines their complex nonuniform behavior in the D(2)O environment with thicker silk films undergoing delamination during swelling. For a silk monolayer with an initial thickness of 6 nm, we observed the increase in the effective thickness by 60% combined with surprising decrease in density. Considering the nanoporous morphology of the hydrophobic silk layer, we suggested that the apparent increase in its thickness in liquid environment is caused by the air nanobubble trapping phenomenon at the liquid-solid interface.
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Affiliation(s)
- Brett Wallet
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Shchepelina O, Drachuk I, Gupta MK, Lin J, Tsukruk VV. Silk-on-silk layer-by-layer microcapsules. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:4655-60. [PMID: 21915919 DOI: 10.1002/adma.201102234] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 07/16/2011] [Indexed: 05/26/2023]
Affiliation(s)
- Olga Shchepelina
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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