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Aibinder P, Cohen-Erez I, Rapaport H. Rational Formulation of targeted ABT-737 nanoparticles by self-assembled polypeptides and designed peptides. Heliyon 2024; 10:e26095. [PMID: 38420433 PMCID: PMC10900936 DOI: 10.1016/j.heliyon.2024.e26095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/11/2023] [Accepted: 02/07/2024] [Indexed: 03/02/2024] Open
Abstract
Here we present the development of nanoparticles (NPs) formulations specifically designed for targeting the antiapoptotic Bcl-2 proteins on the outer membrane of mitochondria with the drug agent ABT-737. The NPs which are self-assembled by the natural polypeptide poly gamma glutamic acid (ϒPGA) and a designed cationic and amphiphilic peptide (PFK) have been shown to target drugs toward mitochondria. In this study we systematically developed the formulation of such NPs loaded with the ABT-737 and demonstrated the cytotoxic effect of the best identified formulation on MDA-MB-231 cells. Our findings emphasize the critical role of solutions pH and the charged state of the components throughout the formulation process as well as the concentrations of the co-components and their mixing sequence, in achieving the most stable and effective cytotoxic formulation. Our study highlights the potential versatility of designed peptides in combination with biopolymers for improving drug delivery formulations and enhance their targeting abilities.
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Affiliation(s)
- Polina Aibinder
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Ifat Cohen-Erez
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Hanna Rapaport
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Ilse Katz Institute for Nanoscale Science and Technology (IKI), Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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2
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Kour A, Panda HS, Singh IR, Kumar A, Panda JJ. Peptide-metal nanohybrids (PMN): Promising entities for combating neurological maladies. Adv Colloid Interface Sci 2023; 318:102954. [PMID: 37487364 DOI: 10.1016/j.cis.2023.102954] [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] [Received: 02/14/2023] [Revised: 05/29/2023] [Accepted: 06/19/2023] [Indexed: 07/26/2023]
Abstract
Nanotherapeutics are gaining traction in the modern scenario because of their unique and distinct properties which separate them from macro materials. Among the nanoparticles, metal NPs (MNPs) have gained importance due to their distinct physicochemical and biological characteristics. Peptides also exhibit several important functions in humans. Different peptides have received approval as pharmaceuticals, and clinical trials have been commenced for several peptides. Peptides are also used as targeting ligands. Considering all the advantages offered by these two entities, the conjugation of MNPs with peptides has emerged as a potential strategy for achieving successful targeting, diagnosis, and therapy of various neurological pathologies.
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Affiliation(s)
- Avneet Kour
- Institute of Nano Science and Technology, Mohali, Punjab 140306, India; University Institute of Pharmaceutical Sciences, Punjab University, Chandigarh 160014, India
| | | | | | - Ashwani Kumar
- University Institute of Pharmaceutical Sciences, Punjab University, Chandigarh 160014, India
| | - Jiban Jyoti Panda
- Institute of Nano Science and Technology, Mohali, Punjab 140306, India.
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3
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Levi T, Yosefi G, Bitton R, Rapaport H. Macroscopic membranes self‐assembled by alginate and a cationic and amphiphilic peptide for cell culture. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Topaz Levi
- Avram and Stella Goldstein‐Goren Department of Biotechnology Engineering Ben‐Gurion University of the Negev Beer‐Sheva Israel
| | - Gal Yosefi
- Department of Chemical Engineering Ben‐Gurion University of the Negev Beer‐Sheva Israel
| | - Ronit Bitton
- Department of Chemical Engineering Ben‐Gurion University of the Negev Beer‐Sheva Israel
- Ilse Katz Institute for Nanoscale Science and Technology (IKI) Ben‐Gurion University of the Negev Beer‐Sheva Israel
| | - Hanna Rapaport
- Avram and Stella Goldstein‐Goren Department of Biotechnology Engineering Ben‐Gurion University of the Negev Beer‐Sheva Israel
- Ilse Katz Institute for Nanoscale Science and Technology (IKI) Ben‐Gurion University of the Negev Beer‐Sheva Israel
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4
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Yosefi G, Levi T, Rapaport H, Bitton R. Time matters for macroscopic membranes formed by alginate and cationic β-sheet peptides. SOFT MATTER 2020; 16:10132-10142. [PMID: 32812622 DOI: 10.1039/d0sm01197e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hierarchically ordered planar and spherical membranes (sacs) were constructed using amphiphilic and cationic β-sheet peptides that spontaneously assembled together with negatively charged alginate solution. The system was found to form either a fully developed membrane structure with three distinct regions including characteristic perpendicular fibers or a non-fully developed contact layer lacking these standing fibers, depending on the peptide age, membrane geometry and membrane incubation time. The morphological differences were found to strongly depend on fairly-long incubation time frames that influenced both the peptide's intrinsic alignment and the reaction-diffusion process taking place at the interface. A three-stage mechanism was suggested and key parameters affecting the development process were identified. Stability tests in biologically relevant buffers confirmed the suitability of these membranes for bio applications.
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Affiliation(s)
- Gal Yosefi
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
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5
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Yin X, Teradal NL, Jelinek R. Porous Gold Nanotubes for Enhanced Methanol Oxidation Catalysis. ChemistrySelect 2017. [DOI: 10.1002/slct.201702524] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiuxiu Yin
- Department of Chemistry; Ben-Gurion University of the Negev; Beer Sheva 84105 Israel
| | - Nagappa L. Teradal
- Department of Chemistry; Ben-Gurion University of the Negev; Beer Sheva 84105 Israel
| | - Raz Jelinek
- Department of Chemistry; Ben-Gurion University of the Negev; Beer Sheva 84105 Israel
- Ilse Katz Institute for Nanotechnology; Ben-Gurion University of the Negev; Beer Sheva 84105 Israel
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6
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Wang W, Anderson CF, Wang Z, Wu W, Cui H, Liu CJ. Peptide-templated noble metal catalysts: syntheses and applications. Chem Sci 2017; 8:3310-3324. [PMID: 28507701 PMCID: PMC5416928 DOI: 10.1039/c7sc00069c] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 02/11/2017] [Indexed: 01/10/2023] Open
Abstract
Noble metal catalysts have been widely used in many applications because of their high activity and selectivity. However, a controllable preparation of noble metal catalysts still remains as a significant challenge. To overcome this challenge, peptide templates can play a critical role in the controllable syntheses of catalysts owing to their flexible binding with specific metallic surfaces and self-assembly characteristics. By employing peptide templates, the size, shape, facet, structure, and composition of obtained catalysts can all be specifically controlled under the mild synthesis conditions. In addition, catalysts with spherical, nanofiber, and nanofilm structures can all be produced by associating with the self-assembly characteristics of peptide templates. Furthermore, the peptide-templated noble metal catalysts also reveal significantly enhanced catalytic behaviours compared with conventional catalysts because the electron conductivity, metal dispersion, and reactive site exposure can all be improved. In this review, we summarize the research progresses in the syntheses of peptide-templated noble metal catalysts. The applications of the peptide-templated catalysts in organic reactions, photocatalysis, and electrocatalysis are discussed, and the relationship between structure and activity of these catalysts are addressed. Future opportunities, including new catalytic materials designed by using biological principles, are indicated to achieve selective, eco-friendly, and energy neutral synthesis approaches.
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Affiliation(s)
- Wei Wang
- Tianjin Co-Innovation Center of Chemical Science & Engineering , School of Chemical Engineering and Technology , Tianjin University , Tianjin 300072 , China .
- International Joint Research Centre for Catalytic Technology , Key Laboratory of Chemical Engineering Process & Technology for High-Efficiency Conversion , School of Chemistry and Material Science , Heilongjiang University , Harbin 150080 , China
| | - Caleb F Anderson
- Department of Chemical and Biomolecular Engineering , Institute for NanoBioTechnology , Johns Hopkins University , Baltimore , MD 21218 , USA
| | - Zongyuan Wang
- Tianjin Co-Innovation Center of Chemical Science & Engineering , School of Chemical Engineering and Technology , Tianjin University , Tianjin 300072 , China .
| | - Wei Wu
- International Joint Research Centre for Catalytic Technology , Key Laboratory of Chemical Engineering Process & Technology for High-Efficiency Conversion , School of Chemistry and Material Science , Heilongjiang University , Harbin 150080 , China
| | - Honggang Cui
- Department of Chemical and Biomolecular Engineering , Institute for NanoBioTechnology , Johns Hopkins University , Baltimore , MD 21218 , USA
| | - Chang-Jun Liu
- Tianjin Co-Innovation Center of Chemical Science & Engineering , School of Chemical Engineering and Technology , Tianjin University , Tianjin 300072 , China .
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7
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Yu X, Wang Z, Su Z, Wei G. Design, fabrication, and biomedical applications of bioinspired peptide–inorganic nanomaterial hybrids. J Mater Chem B 2017; 5:1130-1142. [DOI: 10.1039/c6tb02659a] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We presented the design, composition, and typical biomedical applications of bioinspired peptide–inorganic nanomaterial hybrids.
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Affiliation(s)
- Xiaoqing Yu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- 100029 Beijing
- China
| | - Zhenping Wang
- Faculty of Production Engineering
- University of Bremen
- D-28359 Bremen
- Germany
| | - Zhiqiang Su
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- 100029 Beijing
- China
| | - Gang Wei
- Faculty of Production Engineering
- University of Bremen
- D-28359 Bremen
- Germany
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8
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Morag A, Jelinek R. “Bottom-up” transparent electrodes. J Colloid Interface Sci 2016; 482:267-289. [DOI: 10.1016/j.jcis.2016.07.079] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 07/10/2016] [Accepted: 07/29/2016] [Indexed: 12/01/2022]
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9
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Bhunia SK, Zeiri L, Manna J, Nandi S, Jelinek R. Carbon-Dot/Silver-Nanoparticle Flexible SERS-Active Films. ACS APPLIED MATERIALS & INTERFACES 2016; 8:25637-25643. [PMID: 27585236 DOI: 10.1021/acsami.6b10945] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Development of effective platforms for surface enhanced Raman scattering (SERS) sensing has mostly focused on fabrication of colloidal metal surfaces and tuning of their surface morphologies, designed to create "hot spots" in which plasmonic fields yield enhanced SERS signals. We fabricated distinctive SERS-active flexible films comprising polydimethylsiloxane (PDMS) embedding carbon dots (C-dots) and coated with silver nano-particles (Ag NPs). We show that the polymer-associated Ag NPs and C-dots intimately affected the physical properties of each other. In particular, the C-dot-Ag-NP-polymer films exhibited SERS properties upon deposition of versatile targets, both conventional SERS-active dyes as well as bacterial samples. We show that the SERS response was correlated to the formation C-dots within the polymer film and the physical proximity between the C-dots and Ag NPs, indicating that coupling between the plasmonic fields of the Ag NPs and C-dots' excitons constituted a prominent factor in the SERS properties.
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Affiliation(s)
- Susanta Kumar Bhunia
- Department of Chemistry, Ben Gurion University of the Negev , Beer Sheva 84105, Israel
| | - Leila Zeiri
- Ilse Katz Institute for Nanotechnology, Ben Gurion University of the Negev , Beer Sheva 84105, Israel
| | - Joydeb Manna
- Department of Chemistry, Ben Gurion University of the Negev , Beer Sheva 84105, Israel
| | - Sukhendu Nandi
- Department of Chemistry, Ben Gurion University of the Negev , Beer Sheva 84105, Israel
| | - Raz Jelinek
- Department of Chemistry, Ben Gurion University of the Negev , Beer Sheva 84105, Israel
- Ilse Katz Institute for Nanotechnology, Ben Gurion University of the Negev , Beer Sheva 84105, Israel
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10
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Yin X, Peretz Y, Oppenheimer PG, Zeiri L, Masarwa A, Froumin N, Jelinek R. Conductive and SERS-active colloidal gold films spontaneously formed at a liquid/liquid interface. RSC Adv 2016. [DOI: 10.1039/c6ra03403a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Colloidal Au film forms at a water/pentane interface through spontaneous crystallization/reduction of water-soluble gold complex.
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Affiliation(s)
- Xiuxiu Yin
- Department of Chemistry
- Ben Gurion University of the Negev
- Beer Sheva 84105
- Israel
| | - Yossef Peretz
- Department of Chemistry
- Ben Gurion University of the Negev
- Beer Sheva 84105
- Israel
| | | | - Leila Zeiri
- Ilse Katz Institute for Nanotechnology
- Ben Gurion University of the Negev
- Beer Sheva 84105
| | - Alexandra Masarwa
- Department of Chemistry
- Ben Gurion University of the Negev
- Beer Sheva 84105
- Israel
| | - Natalya Froumin
- Ilse Katz Institute for Nanotechnology
- Ben Gurion University of the Negev
- Beer Sheva 84105
| | - Raz Jelinek
- Department of Chemistry
- Ben Gurion University of the Negev
- Beer Sheva 84105
- Israel
- Ilse Katz Institute for Nanotechnology
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11
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Ma Q, Zhang H, Liu W, Ge J, Wu J, Wang S, Wang P. Surface-enhanced Raman scattering substrate based on cysteamine-modified gold nanoparticle aggregation for highly sensitive pentachlorophenol detection. RSC Adv 2016. [DOI: 10.1039/c6ra15774b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A new surface-enhanced Raman scattering (SERS) substrate based on cysteamine-modified gold nanoparticles (AuNPs) on the glass surface has been developed for the monitoring of pentachlorophenol (PCP) in water samples.
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Affiliation(s)
- Qian Ma
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Hongyan Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Weimin Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Jiechao Ge
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Jiasheng Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Shujun Wang
- Beijing Key Laboratory of Optical Detection Technology for Oil and Gas
- China University of Petroleum
- Beijing 102249
- China
| | - Pengfei Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
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12
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Manna J, Vinod TP, Flomin K, Jelinek R. Photocatalytic hybrid Au/ZnO nanoparticles assembled through a one-pot method. J Colloid Interface Sci 2015; 460:113-8. [PMID: 26319327 DOI: 10.1016/j.jcis.2015.08.053] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 08/23/2015] [Indexed: 11/17/2022]
Abstract
Growth of metal domains on semiconductor nanoparticles is known to enhance their photocatalytic properties. We prepared ZnO nanoparticles decorated with metallic Au domains through a new one-pot microwave-based strategy. The synthetic route utilized microwave-heating of a mixture of only three components: Zn(2+) salt, Au(SCN)4(-) which served as a precursor for metallic gold, and Tris base. The Tris molecules had a dual role in the process, both shaping the morphology of the ZnO particles, as well as constituting docking and nucleation sites for the Au(SCN)4(-) ions. The Au complex subsequently underwent spontaneous crystallization/reduction without co-addition of reducing or stabilizing agents, yielding Au nanoparticles attached to the ZnO surface. We show that the hybrid Au/ZnO nanoparticles exhibited enhanced photocatalytic properties compared to the plain ZnO nanoparticles.
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Affiliation(s)
- Joydeb Manna
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - T P Vinod
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Kobi Flomin
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Raz Jelinek
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
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13
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Cohen-Erez I, Rapaport H. Coassemblies of the Anionic Polypeptide γ-PGA and Cationic β-Sheet Peptides for Drug Delivery to Mitochondria. Biomacromolecules 2015; 16:3827-35. [DOI: 10.1021/acs.biomac.5b01140] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ifat Cohen-Erez
- Avram and Stella
Goldstein-Goren Department of Biotechnology Engineering and Ilse Katz Institute for Nanoscale Science
and Technology (IKI), Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Hanna Rapaport
- Avram and Stella
Goldstein-Goren Department of Biotechnology Engineering and Ilse Katz Institute for Nanoscale Science
and Technology (IKI), Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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14
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15
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Kim YO, Jang HS, Kim YH, You JM, Park YS, Jin K, Kang O, Nam KT, Kim JW, Lee SM, Lee YS. A tyrosine-rich peptide induced flower-like palladium nanostructure and its catalytic activity. RSC Adv 2015. [DOI: 10.1039/c5ra11817d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Flower-like palladium nanostructure (Pd nano-flower) induced by tyrosine-rich peptide, Tyr-Tyr-Ala-His-Ala-Tyr-Tyr (YYAHAYY), showed excellent catalytic activities in copper-free Sonogashira cross-coupling reaction in water.
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Affiliation(s)
- Young-O Kim
- School of Chemical and Biological Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
| | - Hyung-Seok Jang
- School of Chemical and Biological Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
| | - Yo-han Kim
- School of Chemical and Biological Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
| | - Jae Myoung You
- School of Chemical and Biological Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
| | - Yong-Sun Park
- Department of Materials Science and Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
| | - Kyoungsuk Jin
- Department of Materials Science and Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
| | - Onyu Kang
- Department of Chemical Engineering
- Kangwon National University
- Samcheok 245-711
- Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
| | - Jung Won Kim
- Department of Chemical Engineering
- Kangwon National University
- Samcheok 245-711
- Republic of Korea
| | - Sang-Myung Lee
- Department of Chemical Engineering
- Kangwon National University
- Chuncheon 200-701
- Republic of Korea
| | - Yoon-Sik Lee
- School of Chemical and Biological Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
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16
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Trachtenberg A, Vinod T, Jelinek R. Transparent, conductive polystyrene in three dimensional configurations. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.08.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Vinod TP, Froumin N, Mogiliansky D, Zeiri L, Ezersky V, Jelinek R. Nanostructure Synthesis at the Solid-Water Interface: Spontaneous Assembly and Chemical Transformations of Tellurium Nanorods. Chemphyschem 2014; 15:3026-31. [DOI: 10.1002/cphc.201402223] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 06/05/2014] [Indexed: 11/12/2022]
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18
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Stefaniu C, Brezesinski G, Möhwald H. Langmuir monolayers as models to study processes at membrane surfaces. Adv Colloid Interface Sci 2014; 208:197-213. [PMID: 24612663 DOI: 10.1016/j.cis.2014.02.013] [Citation(s) in RCA: 161] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 02/13/2014] [Accepted: 02/14/2014] [Indexed: 12/12/2022]
Abstract
The use of new sophisticated and highly surface sensitive techniques as synchrotron based X-ray scattering techniques and in-house infrared reflection absorption spectroscopy (IRRAS) has revolutionized the monolayer research. Not only the determination of monolayer structures but also interactions between amphiphilic monolayers at the soft air/liquid interface and molecules dissolved in the subphase are important for many areas in material and life sciences. Monolayers are convenient quasi-two-dimensional model systems. This review focuses on interactions between amphiphilic molecules in binary and ternary mixtures as well as on interfacial interactions with interesting biomolecules dissolved in the subphase. The phase state of monolayers can be easily triggered at constant temperature by increasing the packing density of the lipids by compression. Simultaneously the monolayer structure changes are followed in situ by grazing incidence X-ray diffraction or IRRAS. The interactions can be indirectly determined by the observed structure changes. Additionally, the yield of enzymatic reaction can be quantitatively determined, secondary structures of peptides and proteins can be measured and compared with those observed in bulk. In this way, the influence of a confinement on the structural properties of biomolecules can be determined. The adsorption of DNA can be quantified as well as the competing adsorption of ions at charged interfaces. The influence of modified nanoparticles on model membranes can be clearly determined. In this review, the relevance and utility of Langmuir monolayers as suitable models to study physical and chemical interactions at membrane surfaces are clearly demonstrated.
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Affiliation(s)
- Cristina Stefaniu
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, D-14476 Potsdam, Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, D-14476 Potsdam, Germany
| | - Helmuth Möhwald
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, D-14476 Potsdam, Germany.
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19
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Vinod TP, Jelinek R. Nonplanar conductive surfaces via "bottom-up" nanostructured gold coating. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3341-3346. [PMID: 24548243 DOI: 10.1021/am4053656] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Development of technologies for the construction of bent, curved, and flexible conductive surfaces is among the most important albeit challenging goals in the promising field of "flexible electronics". We present a generic solution-based "bottom-up" approach for assembling conductive gold nanostructured layers on nonplanar polymer surfaces. The simple two-step experimental scheme is based upon incubation of an amine-displaying polymer [the abundantly used poly(dimethylsiloxane) (PDMS), selected here as a proof of concept] with Au(SCN)4(-), followed by a brief treatment with a conductive polymer [poly(3,4-thylenedioxythiophene)/poly(styrenesulfonate)] solution. Importantly, no reducing agent is co-added to the gold complex solution. The resultant surfaces are conductive and exhibit a unique "nanoribbon" gold morphology. The scheme yields conductive layers upon PDMS in varied configurations: planar, "wrinkled", and mechanically bent surfaces. The technology is simple, inexpensive, and easy to implement for varied polymer surfaces (and other substances), opening the way for practical applications in flexible electronics and related fields.
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Affiliation(s)
- T P Vinod
- Ilse Katz Institute for Nanoscale Science and Technology and Department of Chemistry, Ben Gurion University of the Negev , Beer Sheva 8410, Israel
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