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Kramer N, Sivron I, Le Saux G, Mendieta-Moreno JI, Ashkenasy N. Enhancement of electronic effects at a biomolecule-inorganic interface by multivalent interactions. Phys Chem Chem Phys 2023; 25:3251-3257. [PMID: 36625465 DOI: 10.1039/d2cp03679g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The binding of peptides and proteins through multiple weak interactions is ubiquitous in nature. Biopanning has been used to "hijack" this multivalent binding for the functionalization of surfaces. For practical applications it is important to understand how multivalency influences the binding interactions and the resulting behaviour of the surface. Considering the importance of optimization of the electronic properties of surfaces in diverse electronic and optoelectronic applications, we study here the relation between the multivalency effect and the resulting modulation of the surface work function. We use 12-mer peptides, which were found to strongly bind to oxide surfaces, to functionalize indium tin oxide (ITO) surfaces. We show that the affinity of the peptides for the ITO surface, and concurrently the effect on the ITO work function, are linearly affected by the number of basic residues in the sequence. The multivalent binding interactions lead to a peptide crowding effect, and a stronger modulation of the work function for adodecapeptide than for a single basic amino acid functionalization. The bioderived molecular platform presented herein can pave the way to a novel approach to improve the performance of optoelectronic devices in an eco-friendly manner.
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Affiliation(s)
- Naomi Kramer
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
| | - Ido Sivron
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
| | - Guillaume Le Saux
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
| | - Jesús I Mendieta-Moreno
- Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | - Nurit Ashkenasy
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel. .,Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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2
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Kramer N, Sarkar S, Kronik L, Ashkenasy N. Systematic modification of the indium tin oxide work function via side-chain modulation of an amino-acid functionalization layer. Phys Chem Chem Phys 2019; 21:21875-21881. [PMID: 31553031 DOI: 10.1039/c9cp04079j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Controlled modification of the semiconductor surface work function is of fundamental importance for improvements in the efficiency of (opto-)electronic devices. Binding amino acids to a semiconductor surface through their common carboxylic group offers a versatile tool for modulation of surface properties by the choice of their side chain. This approach is demonstrated here by tailoring the surface work function of indium tin oxide, one of the most abundant transparent electrodes in organic optoelectronic devices. We find that the work function can be systematically tuned by the side chain of the amino acid, resulting in either an increase or a decrease of the work function, over a large range of ∼250 meV. This side chain effect is mostly due to alteration of the dipole component perpendicular to the surface, with a generally smaller contribution for changes in surface band bending. These findings also shed light on electronic interactions at the interface between proteins and semiconductors, which are of importance for future bio-electronic devices.
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Affiliation(s)
- Naomi Kramer
- Department of Materials Engineering and Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
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3
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Amit M, Yuran S, Gazit E, Reches M, Ashkenasy N. Tailor-Made Functional Peptide Self-Assembling Nanostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1707083. [PMID: 29989255 DOI: 10.1002/adma.201707083] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 04/05/2018] [Indexed: 05/08/2023]
Abstract
Noncovalent interactions are the main driving force in the folding of proteins into a 3D functional structure. Motivated by the wish to reveal the mechanisms of the associated self-assembly processes, scientists are focusing on studying self-assembly processes of short protein segments (peptides). While this research has led to major advances in the understanding of biological and pathological process, only in recent years has the applicative potential of the resulting self-assembled peptide assemblies started to be explored. Here, major advances in the development of biomimetic supramolecular peptide assemblies as coatings, gels, and as electroactive materials, are highlighted. The guiding lines for the design of helical peptides, β strand peptides, as well as surface binding monolayer-forming peptides that can be utilized for a specific function are highlighted. Examples of their applications in diverse immerging applications in, e.g., ecology, biomedicine, and electronics, are described. Taking into account that, in addition to extraordinary design flexibility, these materials are naturally biocompatible and ecologically friendly, and their production is cost effective, the emergence of devices incorporating these biomimetic materials in the market is envisioned in the near future.
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Affiliation(s)
- Moran Amit
- Department of Materials Engineering, Ben Gurion University of the Negev, Beer-Sheva, 84105, Israel
- Department of Electrical and Computer Engineering, UC San Diego, La Jolla, CA, 92093-0407, USA
| | - Sivan Yuran
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Ehud Gazit
- Department of Molecular Microbiology and Biotechnology, Department of Materials Science and Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Meital Reches
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Nurit Ashkenasy
- Department of Materials Engineering, Ben Gurion University of the Negev, Beer-Sheva, 84105, Israel
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4
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Berto M, Diacci C, D'Agata R, Pinti M, Bianchini E, Lauro MD, Casalini S, Cossarizza A, Berggren M, Simon D, Spoto G, Biscarini F, Bortolotti CA. EGOFET Peptide Aptasensor for Label-Free Detection of Inflammatory Cytokines in Complex Fluids. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/adbi.201700072] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Marcello Berto
- Dipartimento di Scienze della Vita; Università di Modena e Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Chiara Diacci
- Dipartimento di Scienze della Vita; Università di Modena e Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Roberta D'Agata
- Dipartimento di Scienze Chimiche; Università di Catania; V.le A. Doria 6 95131 Catania
| | - Marcello Pinti
- Dipartimento di Scienze della Vita; Università di Modena e Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Elena Bianchini
- Dipartimento di Scienze della Vita; Università di Modena e Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Michele Di Lauro
- Dipartimento di Scienze della Vita; Università di Modena e Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Stefano Casalini
- Dipartimento di Scienze della Vita; Università di Modena e Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Andrea Cossarizza
- Dipartimento di Scienze Mediche e Chirurgiche Materno-Infantili e dell'Adulto; Università di Modena e Reggio Emilia; Via Campi 287 41125 Modena Italy
| | - Magnus Berggren
- Laboratory of Organic Electronics; Department of Science and Technology; ITN; Linköping University; S-601 74 Norrköping Sweden
| | - Daniel Simon
- Laboratory of Organic Electronics; Department of Science and Technology; ITN; Linköping University; S-601 74 Norrköping Sweden
| | - Giuseppe Spoto
- Dipartimento di Scienze Chimiche; Università di Catania; V.le A. Doria 6 95131 Catania
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici; c/o Dipartimento di Scienze Chimiche; Università di Catania; Viale Andrea Doria 6 95131 Catania Italy
| | - Fabio Biscarini
- Dipartimento di Scienze della Vita; Università di Modena e Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Carlo A. Bortolotti
- Dipartimento di Scienze della Vita; Università di Modena e Reggio Emilia; Via Campi 103 41125 Modena Italy
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Matmor M, Lengyel GA, Horne WS, Ashkenasy N. Peptide-functionalized semiconductor surfaces: strong surface electronic effects from minor alterations to backbone composition. Phys Chem Chem Phys 2017; 19:5709-5714. [DOI: 10.1039/c6cp07198h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Semiconductor surface electronic properties are shown to be sensitive to subtle changes in the backbone composition of surface-bound dipeptide ligands.
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Affiliation(s)
- Maayan Matmor
- Department of Materials Engineering
- Ben Gurion University of the Negev
- Beer-Sheva
- Israel
| | | | - W. Seth Horne
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
| | - Nurit Ashkenasy
- Department of Materials Engineering
- Ben Gurion University of the Negev
- Beer-Sheva
- Israel
- The Ilze Katz Institute for Nanoscale Science and Technology
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6
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Cannon DA, Ashkenasy N, Tuttle T. Influence of Solvent in Controlling Peptide-Surface Interactions. J Phys Chem Lett 2015; 6:3944-3949. [PMID: 26722896 DOI: 10.1021/acs.jpclett.5b01733] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Protein binding to surfaces is an important phenomenon in biology and in modern technological applications. Extensive experimental and theoretical research has been focused in recent years on revealing the factors that govern binding affinity to surfaces. Theoretical studies mainly focus on examining the contribution of the individual amino acids or, alternatively, the binding potential energies of the full peptide, which are unable to capture entropic contributions and neglect the dynamic nature of the system. We present here a methodology that involves the combination of nonequilibrium dynamics simulations with strategic mutation of polar residues to reveal the different factors governing the binding free energy of a peptide to a surface. Using a gold-binding peptide as an example, we show that relative binding free energies are a consequence of the balance between strong interactions of the peptide with the surface and the ability for the bulk solvent to stabilize the peptide.
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Affiliation(s)
- Daniel A Cannon
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Nurit Ashkenasy
- Department of Materials Engineering and the Ilze Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev , Beer-Sheva, Israel
| | - Tell Tuttle
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
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Tarakeshwar P, Palma JL, Holland GP, Fromme P, Yarger JL, Mujica V. Probing the Nature of Charge Transfer at Nano-Bio Interfaces: Peptides on Metal Oxide Nanoparticles. J Phys Chem Lett 2014; 5:3555-3559. [PMID: 26278609 DOI: 10.1021/jz501854x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Characterizing the nano-bio interface has been a long-standing endeavor in the quest for novel biosensors, biophotovoltaics, and biocompatible electronic devices. In this context, the present computational work on the interaction of two peptides, A6K (Ac-AAAAAAK-NH2) and A7 (Ac-AAAAAAA-NH2) with semiconducting TiO2 nanoparticles is an effort to understand the peptide-metal oxide nanointerface. These investigations were spurred by recent experimental observations that nanostructured semiconducting metal oxides templated with A6K peptides not only stabilize large proteins like photosystem-I (PS-I) but also exhibit enhanced charge-transfer characteristics. Our results indicate that α-helical structures of A6K are not only energetically more stabilized on TiO2 nanoparticles, but the resulting hybrids also exhibit enhanced electron transfer characteristics. This enhancement can be attributed to substantial changes in the electronic characteristics at the peptide-TiO2 interface. Apart from understanding the mechanism of electron transfer (ET) in peptide-stabilized PS-I on metal oxide nanoparticles, the current work also has implications in the development of novel solar cells and photocatalysts.
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Affiliation(s)
- Pilarisetty Tarakeshwar
- †Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Julio L Palma
- ‡Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5001, United States
| | - Gregory P Holland
- §Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182-1030, United States
| | - Petra Fromme
- †Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Jeffery L Yarger
- †Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Vladimiro Mujica
- †Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, United States
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