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Pradhan MK, Gupta D, Namdev KR, Miglani C, Pal A, Srivastava A. Anion-responsive self-assembled hydrogels of a phenylalanine-TREN conjugate allow sequential release of propranolol and doxorubicin. NANOSCALE 2022; 14:15079-15090. [PMID: 36200975 DOI: 10.1039/d2nr04320c] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Stimuli-responsive self-assembled and supramolecular hydrogels derived from peptide amphiphiles have opened exciting new avenues in biomedicine and drug delivery. Herein, we screened a series of phenylalanine-amphiphiles possessing polyamine and oxyethylene appendages for their self-assembly and anion-responsiveness and found that the tris(aminoethyl)amine (TREN) containing amphiphile NapF-TREN formed injectable hydrogels that could be disrupted upon the addition of stoichiometric amounts of tetrahedral monovalent anions such as H2PO4- and HSO4-, while the addition of other anions such as Cl-, HPO42-, CO32-, HCO3- or SO42- did not affect the gel stability. The anion-gelator interaction was investigated by 1H and 31P NMR spectroscopy as well as by Isothermal Titration Calorimetry (ITC). These studies confirmed a 1 : 1 stoichiometry and revealed negative enthalpy and negative entropy for the binding of H2PO4- with NapF-TREN. Microscopic investigations by TEM, AFM, and SAXS revealed that H2PO4- anions induced a nanofiber-to-nanoglobule morphological change in the aqueous self-assemblies of NapF-TREN. However, upon ageing the samples, slow reformation of the nanofibers was also observed, reflecting the reversibility of the anion-gelator interaction. The anion- and pH-responsive nature of the NapF-TREN hydrogels was exploited to program sequential release of entrapped drugs propranolol and doxorubicin.
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Affiliation(s)
- Manas Kumar Pradhan
- Department of Chemistry, Indian Institute of Science Education and Research, Bhauri, Bhopal By-pass Road, Bhopal-462066, India.
| | - Deepika Gupta
- Chemical Biology Unit, Institute of Nano Science and Technology, Sector 81, Mohali, Punjab 140306, India.
| | - Kavthekar Rupesh Namdev
- Department of Chemistry, Indian Institute of Science Education and Research, Bhauri, Bhopal By-pass Road, Bhopal-462066, India.
| | - Chirag Miglani
- Chemical Biology Unit, Institute of Nano Science and Technology, Sector 81, Mohali, Punjab 140306, India.
| | - Asish Pal
- Chemical Biology Unit, Institute of Nano Science and Technology, Sector 81, Mohali, Punjab 140306, India.
| | - Aasheesh Srivastava
- Department of Chemistry, Indian Institute of Science Education and Research, Bhauri, Bhopal By-pass Road, Bhopal-462066, India.
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2
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Liu Y, Jin H, Zhang Q, Guo R. Amphiphilic protein controlled synthesis of rice-shaped copper oxide and its substrate dependent enzyme-mimicking activity. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1848572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Yan Liu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, P. R. China
| | - Haijia Jin
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, P. R. China
| | - Qianya Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, P. R. China
| | - Rong Guo
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, P. R. China
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3
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Jadhav RG, Singh D, Krivoshapkin PV, Das AK. Electrodeposited Organic–Inorganic Nanohybrid as Robust Bifunctional Electrocatalyst for Water Splitting. Inorg Chem 2020; 59:7469-7478. [DOI: 10.1021/acs.inorgchem.0c00227] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Rohit G. Jadhav
- Department of Chemistry, Indian Institute of Technology Indore, Indore 453552, India
| | - Devraj Singh
- Department of Chemistry, Indian Institute of Technology Indore, Indore 453552, India
| | | | - Apurba K. Das
- Department of Chemistry, Indian Institute of Technology Indore, Indore 453552, India
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4
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Liu Y, Jin H, Zou W, Guo R. Protein-mediated sponge-like copper sulfide as an ingenious and efficient peroxidase mimic for colorimetric glucose sensing. RSC Adv 2020; 10:28819-28826. [PMID: 35520084 PMCID: PMC9055861 DOI: 10.1039/d0ra05496h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 07/29/2020] [Indexed: 12/19/2022] Open
Abstract
Strenuous efforts have been made to develop nanozymes for achieving the performance of natural enzymes to broaden their application in practice, but the fabrication of high-performance and biocompatible nanozymes via facile and versatile approaches has always been a great challenge. Here, sponge-like casein-CuS hybrid has been facilely synthesized in the presence of amphiphilic protein-casein through a simple one-step approach. Casein-CuS hybrid exhibits substrates-dependent peroxidase-like activity. Casein-CuS hybrid exhibits well peroxidase-like activity with 3,3′,5,5′-tetramethylbenzidine (TMB) and 1,2-diaminobenzene (OPD) as substrates, and the affinity of OPD towards the hybrid nanozyme is much higher than that of TMB. More importantly, due to the high affinity of OPD and the well biocompatibility of the hybrid nanozyme, a superior enzyme cascade for glucose based on the well cooperative effect of casein-CuS hybrid and glucose oxidase is developed. The proposed glucose sensor exhibits a wide linear range of 0.083 to 75 μM and a detection limit of 5 nM. This suggests the promising utilization of protein–metal hybrid nanozymes as robust and potent peroxidase mimics in the medical, food and environmental detection fields. Strenuous efforts have been made to develop nanozymes for achieving the performance of natural enzymes, but the fabrication of high-performance and biocompatible nanozymes via facile and versatile approaches has always been a great challenge.![]()
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Affiliation(s)
- Yan Liu
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
| | - Haijia Jin
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
| | - Wenting Zou
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
| | - Rong Guo
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
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5
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Diaferia C, Balasco N, Sibillano T, Ghosh M, Adler-Abramovich L, Giannini C, Vitagliano L, Morelli G, Accardo A. Amyloid-Like Fibrillary Morphology Originated by Tyrosine-Containing Aromatic Hexapeptides. Chemistry 2018; 24:6804-6817. [PMID: 29504716 DOI: 10.1002/chem.201800351] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Indexed: 01/04/2023]
Abstract
Phenylalanine-based nanostructures have attracted the attention of the material science community for their functional properties. These properties strongly depend on the hierarchic organization of the nanostructure that in turn can be finely tuned by punctual chemical modifications of the building blocks. Herein, we investigate how the partial or the complete replacement of the Phe residues in PEG8 -(Phe)6 (PEG8 -F6) with tyrosines to generate PEG8 -(Phe-Tyr)3 (PEG8 -(FY)3) or PEG8 -(Tyr)6 (PEG8 -Y6) affects the structural/functional properties of the nanomaterial formed by the parental compound. Moreover, the effect of the PEG derivatization was evaluated through the characterization of the peptides without the PEG moiety (Tyr)6 (Y6) and (Phe-Tyr)3 ((FY)3). Both PEG8 -Y6 and PEG8 -(FY)3 can self-assemble in water at micromolar concentrations in β-sheet-rich nanostructures. However, WAXS diffraction patterns of these compounds present significant differences. PEG8 -(FY)3 shows a 2D WAXS oriented fiber diffraction profile characterized by the concomitant presence of a 4.7 Å meridional and a 12.5 Å equatorial reflection that are generally associated with cross-β structure. On the other hand, the pattern of PEG8 -Y6 is characterized by the presence of circles typically observed in the presence of PEG crystallization. Molecular modeling and dynamics provide an atomic structural model of the peptide spine of these compounds that is in good agreement with WAXS experimental data. Gelation phenomenon was only detected for PEG8 -(FY)3 above a concentration of 1.0 wt % as confirmed by storage (G'≈100 Pa) and loss (G''≈28 Pa) moduli in rheological studies. The cell viability on CHO cells of this soft hydrogel was certified to be 90 % after 24 hours of incubation.
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Affiliation(s)
- Carlo Diaferia
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II" and DFM Scarl, Via Mezzocannone 16, 80134, Naples, Italy
| | - Nicole Balasco
- Institute of Biostructures and Bioimaging (IBB), CNR, Via Mezzocannone 16, 80134, Naples, Italy
| | - Teresa Sibillano
- Institute of Crystallography (IC), CNR, Via Amendola 122, 70126, Bari, Italy
| | - Moumita Ghosh
- Department of Oral Biology, The Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Lihi Adler-Abramovich
- Department of Oral Biology, The Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Cinzia Giannini
- Institute of Crystallography (IC), CNR, Via Amendola 122, 70126, Bari, Italy
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging (IBB), CNR, Via Mezzocannone 16, 80134, Naples, Italy
| | - Giancarlo Morelli
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II" and DFM Scarl, Via Mezzocannone 16, 80134, Naples, Italy
| | - Antonella Accardo
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II" and DFM Scarl, Via Mezzocannone 16, 80134, Naples, Italy
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6
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Almohammed S, Zhang F, Rodriguez BJ, Rice JH. Photo-induced surface-enhanced Raman spectroscopy from a diphenylalanine peptide nanotube-metal nanoparticle template. Sci Rep 2018; 8:3880. [PMID: 29497167 PMCID: PMC5832858 DOI: 10.1038/s41598-018-22269-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 02/16/2018] [Indexed: 11/09/2022] Open
Abstract
UV irradiation of aligned diphenylalanine peptide nanotubes (FF-PNTs) decorated with plasmonic silver nanoparticles (Ag NPs) enables photo-induced surface-enhanced Raman spectroscopy. UV-induced charge transfer facilitates a chemical enhancement that provides up to a 10-fold increase in surface-enhanced Raman intensity and allows the detection of a wide range of small molecules and low Raman cross-section molecules at concentrations as low as 10-13 M. The aligned FF-PNT/Ag NP template further prevents photodegradation of the molecules under investigation. Our results demonstrate that FF-PNTs can be used as an alternative material to semiconductors such as titanium dioxide for photo-induced surface-enhanced Raman spectroscopy applications.
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Affiliation(s)
- Sawsan Almohammed
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Fengyuan Zhang
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Brian J Rodriguez
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland.
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
| | - James H Rice
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland.
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7
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Mason TO, Michaels TCT, Levin A, Dobson CM, Gazit E, Knowles TPJ, Buell AK. Thermodynamics of Polypeptide Supramolecular Assembly in the Short-Chain Limit. J Am Chem Soc 2017; 139:16134-16142. [DOI: 10.1021/jacs.7b00229] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas O. Mason
- Department of Chemistry, University of Cambridge, Cambridge CB2 1TN, United Kingdom
| | - Thomas C. T. Michaels
- Department of Chemistry, University of Cambridge, Cambridge CB2 1TN, United Kingdom
- Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Aviad Levin
- Department of Chemistry, University of Cambridge, Cambridge CB2 1TN, United Kingdom
| | | | - Ehud Gazit
- Department for Molecular Microbiology and Biotechnology, University of Tel Aviv, Tel Aviv 6997801, Israel
| | - Tuomas P. J. Knowles
- Department of Chemistry, University of Cambridge, Cambridge CB2 1TN, United Kingdom
| | - Alexander K. Buell
- Institute of Physical Biology, University of Düsseldorf, Düsseldorf 40225, Germany
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8
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Sarmoor SS, Hoseini SJ, Hashemi Fath R, Roushani M, Bahrami M. Facile synthesis of PtSnZn nanosheet thin film at oil-water interface by use of organometallic complexes: An efficient catalyst for methanol oxidation and p
-nitrophenol reduction reactions. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3979] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Sajad Saberi Sarmoor
- Department of Chemistry, Faculty of Sciences; Yasouj University; Yasouj 7591874831 Iran
| | - S. Jafar Hoseini
- Department of Chemistry, Faculty of Sciences; Yasouj University; Yasouj 7591874831 Iran
| | - Roghayeh Hashemi Fath
- Department of Chemistry, Faculty of Sciences; Yasouj University; Yasouj 7591874831 Iran
| | - Mahmoud Roushani
- Department of Chemistry, Faculty of Sciences; Ilam University; Ilam 69315516 Iran
| | - Mehrangiz Bahrami
- Department of Chemistry, Faculty of Sciences; Yasouj University; Yasouj 7591874831 Iran
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9
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Johny M, Vijayalakshmi K, Das A, Roy P, Mishra A, Dasgupta J. Modulating the Phe–Phe dipeptide aggregation landscape via covalent attachment of an azobenzene photoswitch. Chem Commun (Camb) 2017; 53:9348-9351. [DOI: 10.1039/c7cc04106c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A covalently modified trans-H-(l)AzoPhe–Phe–OH dipeptide shows reversible photo-switching between its native fibril and vesicle aggregate morphology.
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Affiliation(s)
- Melby Johny
- Department of Chemical Sciences
- Tata Institute of Fundamental Research
- Mumbai
- India
| | | | - Ankita Das
- Department of Chemical Sciences
- Tata Institute of Fundamental Research
- Mumbai
- India
| | - Palas Roy
- Department of Chemical Sciences
- Tata Institute of Fundamental Research
- Mumbai
- India
| | - Aseem Mishra
- KIIT-Technology Business Incubator & KIIT-School of Biotechnology
- KIIT University
- Bhubaneswar
- India
| | - Jyotishman Dasgupta
- Department of Chemical Sciences
- Tata Institute of Fundamental Research
- Mumbai
- India
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10
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Bhagat SD, Srivastava A. Rods, helices and spherulites: diverse self-assembled architectures froml-phenylalanine derivatives. CrystEngComm 2016. [DOI: 10.1039/c5ce02545a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Ma Z, Qiu Y, Yang H, Huang Y, Liu J, Lu Y, Zhang C, Hu P. Effective Synergistic Effect of Dipeptide-Polyoxometalate-Graphene Oxide Ternary Hybrid Materials on Peroxidase-like Mimics with Enhanced Performance. ACS APPLIED MATERIALS & INTERFACES 2015; 7:22036-22045. [PMID: 26388072 DOI: 10.1021/acsami.5b07046] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dipeptide-polyoxometalates (POMs)-graphene oxide (GO) ternary hybrid is an excellent peroxidase-like mimic, exhibiting enhanced peroxidase-like activity compared to POMs alone. The hybrid was readily prepared through a reprecipitation method involving electrostatic encapsulation of H3PW12O40 (PW12) by cationic diphenylalanine (FF) peptide and coassembly of FF@PW12 spheres with graphene oxide (GO). Using 3,3',5,5'-tetramethylbenzidine (TMB) as the chromogenic substrate, the peroxidase-like activity of FF@PW12 was evaluated in the heterogeneous phase, and it is 13 times higher than that of pristine PW12 in the homogeneous phase. Furthermore, ternary hybrids of FF@PW12@GO containing 5 wt % GO could enhance the activity 1.7 times higher than that of FF@PW12. The noncovalent interactions of hydrogen bonding and ionic interaction between GO and POMs are speculated to result in the synergistic effect for the enhancement of peroxidase-like performance. The strong interactions between rGO and PW12 are evaluated by a four-probe Hall measurement via the van der Pauw method, and rGO is significantly p-doped by the doping effect of PW12 with lower LUMO energy than that of the energy level of rGO and also due to the electron reservoir feature of PW12. Cyclic voltammogram measurements also suggest that GO causes significant influence on the electronic structure of the reduced forms of the redox couples of PW12. The nature of the TMB catalytic reaction may originate from the generation of the hydroxyl radical ((•)OH) from the decomposition of H2O2 by ternary hybrids and the formation of peroxo species of POM. Taking advantage of the UV-vis signals of TMB being correlated to the concentration of H2O2, FF@PW12@GO can be used to detect H2O2 within the limit of detection of 0.11 μM, and the detection range is 1-75 μM. The present method indeed opens up a promising route in constructing heterogeneous peroxidase-like mimics through the use of POMs via the introduction of GO for building H2O2 sensors.
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Affiliation(s)
- Zhuo Ma
- School of Life Science and Technology, Harbin Institute of Technology , 92 West Dazhi Street, Harbin, Heilongjiang 150001, P.R. China
| | - Yunfeng Qiu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology , Harbin, Heilongjiang 150090, China
- Key Lab of Microsystem and Microstructure, Ministry of Education, Harbin Institute of Technology , No. 2 YiKuang Street, Harbin, Heilongjiang 150080, PR China
| | - Huihui Yang
- Key Lab of Microsystem and Microstructure, Ministry of Education, Harbin Institute of Technology , No. 2 YiKuang Street, Harbin, Heilongjiang 150080, PR China
| | - Yanmin Huang
- Key Lab of Microsystem and Microstructure, Ministry of Education, Harbin Institute of Technology , No. 2 YiKuang Street, Harbin, Heilongjiang 150080, PR China
| | - Jingjing Liu
- Key Lab of Microsystem and Microstructure, Ministry of Education, Harbin Institute of Technology , No. 2 YiKuang Street, Harbin, Heilongjiang 150080, PR China
| | - Yue Lu
- Key Lab of Microsystem and Microstructure, Ministry of Education, Harbin Institute of Technology , No. 2 YiKuang Street, Harbin, Heilongjiang 150080, PR China
| | - Chen Zhang
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720-1760, United States
| | - PingAn Hu
- Key Lab of Microsystem and Microstructure, Ministry of Education, Harbin Institute of Technology , No. 2 YiKuang Street, Harbin, Heilongjiang 150080, PR China
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12
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Watanabe S, Watarai H. Acceleration of Insulin Amyloid Fibrillation at Liquid–Liquid Interfaces. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20150058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Shiori Watanabe
- Department of Chemistry, Graduate School of Science, Osaka University
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13
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Organometallic precursor route for the fabrication of PtSn bimetallic nanotubes and Pt3Sn/reduced-graphene oxide nanohybrid thin films at oil–water interface and study of their electrocatalytic activity in methanol oxidation. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.07.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Hoseini SJ, Bahrami M, Roushani M. High CO tolerance of Pt/Fe/Fe2O3nanohybrid thin film suitable for methanol oxidation in alkaline medium. RSC Adv 2014. [DOI: 10.1039/c4ra04138k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Hoseini SJ, Bahrami M, Dehghani M. Formation of snowman-like Pt/Pd thin film and Pt/Pd/reduced-graphene oxide thin film at liquid–liquid interface by use of organometallic complexes, suitable for methanol fuel cells. RSC Adv 2014. [DOI: 10.1039/c4ra01625d] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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16
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Hoseini SJ, Mousavi N, Roushani M, Mosaddeghi L, Bahrami M, Rashidi M. Thin film formation of platinum nanoparticles at oil–water interface, using organoplatinum(ii) complexes, suitable for electro-oxidation of methanol. Dalton Trans 2013; 42:12364-9. [DOI: 10.1039/c3dt51175h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Tao K, Wang J, Li Y, Xia D, Shan H, Xu H, Lu JR. Short peptide-directed synthesis of one-dimensional platinum nanostructures with controllable morphologies. Sci Rep 2013; 3:2565. [PMID: 23995118 PMCID: PMC3759059 DOI: 10.1038/srep02565] [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: 06/18/2013] [Accepted: 08/15/2013] [Indexed: 02/02/2023] Open
Abstract
Although one dimensional (1D) Pt nanostructures with well-defined sizes and shapes have fascinating physiochemical properties, their preparation remains a great challenge. Here we report an easy and novel synthesis of 1D Pt nanostructures with controllable morphologies, through the combination of designer self-assembling I3K and phage-displayed P7A peptides. The nanofibrils formed via I3K self-assembly acted as template. Pt precursors ((PtCl4)(2-) and (PtCl6)(2-)) were immobilized by electrostatic interaction on the positively charged template surface and subsequent reduction led to the formation of 1D Pt nanostructures. P7A was applied to tune the continuity of the Pt nanostructures. Here, the electrostatic repulsion between the deprotonated C-terminal carboxyl groups of P7A molecules was demonstrated to play a key role. We finally showed that continuous and ordered 1D Pt morphology had a significantly improved electrochemical performance for the hydrogen and methanol electro-oxidation in comparison with either 1D discrete Pt nanoparticle assemblies or isolated Pt nanoparticles.
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Affiliation(s)
- Kai Tao
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Jiqian Wang
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Yanpeng Li
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Daohong Xia
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Honghong Shan
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Hai Xu
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Jian R. Lu
- Biological Physics Group, School of Physics and Astronomy, the University of Manchester, Manchester M13 9PL, United Kingdom
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18
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Guo C, Luo Y, Zhou R, Wei G. Probing the self-assembly mechanism of diphenylalanine-based peptide nanovesicles and nanotubes. ACS NANO 2012; 6:3907-3918. [PMID: 22468743 DOI: 10.1021/nn300015g] [Citation(s) in RCA: 218] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Nanostructures, particularly those from peptide self-assemblies, have attracted great attention lately due to their potential applications in nanotemplating and nanotechnology. Recent experimental studies reported that diphenylalanine-based peptides can self-assemble into highly ordered nanostructures such as nanovesicles and nanotubes. However, the molecular mechanism of the self-organization of such well-defined nanoarchitectures remains elusive. In this study, we investigate the assembly pathway of 600 diphenylalanine (FF) peptides at different peptide concentrations by performing extensive coarse-grained molecular dynamics (MD) simulations. Based on forty 0.6-1.8 μs trajectories at 310 K starting from random configurations, we find that FF dipeptides not only spontaneously assemble into spherical vesicles and nanotubes, consistent with previous experiments, but also form new ordered nanoarchitectures, namely, planar bilayers and a rich variety of other shapes of vesicle-like structures including toroid, ellipsoid, discoid, and pot-shaped vesicles. The assembly pathways are concentration-dependent. At low peptide concentrations, the self-assembly involves the fusion of small vesicles and bilayers, whereas at high concentrations, it occurs through the formation of a bilayer first, followed by the bending and closure of the bilayer. Energetic analysis suggests that the formation of different nanostructures is a result of the delicate balance between peptide-peptide and peptide-water interactions. Our all-atom MD simulation shows that FF nanostructures are stabilized by a combination of T-shaped aromatic stacking, interpeptide head-to-tail hydrogen-bonding, and peptide-water hydrogen-bonding interactions. This study provides, for the first time to our knowledge, the self-assembly mechanism and the molecular organization of FF dipeptide nanostructures.
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Affiliation(s)
- Cong Guo
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Sciences (Ministry of Education), and Department of Physics, Fudan University, 220 Handan Road, Shanghai, 200433, China
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19
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Wu X, Xiong S, Wang M, Shen J, Chu PK. Low-frequency Raman scattering of bioinspired self-assembled diphenylalanine nanotubes/microtubes. OPTICS EXPRESS 2012; 20:5119-5126. [PMID: 22418317 DOI: 10.1364/oe.20.005119] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Low-frequency Raman scattering from self-assembled bioinspired diphenylalanine (FF) nanotubes/microtubes (NTs/MTs) has been observed for the first time. Four double peaks are identified as the three-dimensional localized collective (acoustic phonon) vibrations of FF molecules in the subnanometer crystalline structure (biological building block) forming the FF NTs/MTs. The increased energy separations between two subpeaks caused by the loss of water in the nanochannel cores are due to the enhancement of vibrational couplings between the FF molecules as a result of the reduction of the influence from water on the coupling. The results provide experimental evidence of localized but still weakly coupled vibrations in organic crystalline nanostructures in the low-frequency region.
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Affiliation(s)
- Xinglong Wu
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
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Su Y, He Q, Yan X, Fei J, Cui Y, Li J. Peptide mesocrystals as templates to create an Au surface with stronger surface-enhanced Raman spectroscopic properties. Chemistry 2011; 17:3370-5. [PMID: 21341331 DOI: 10.1002/chem.201003141] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Indexed: 02/01/2023]
Abstract
The design and fabrication of various nanostructures with predefined geometry and composition is a big challenge of nanotechnology. Here we demonstrate an Au nanoflake film replicated from a self-assembled, well-ordered, dipeptide flower-like hierarchical architecture. Such morphology can give rise to useful and remarkable surface-enhanced Raman spectroscopy (SERS) properties. We obtained these nanostructures by using a scaffold of flake-built spherical dipeptide aggregations. Gold nanoparticles were sputtered on the surface of as-assembled dipeptide by an etching system. After removing the dipeptide templates by ethanol, a metal crust was left with a morphology similar to that of the dipeptide hierarchical structure. The different steps within the process were monitored by using electron microscopy, energy-dispersive spectrum (EDS) analysis and atomic force microscopy (AFM). Cyclic voltammetry and Raman spectra were employed to prove the SERS effect of the obtained Au substrates. The enhancement factor is estimated to be about 10(4) for 4-mercaptobenzoic acid (4-MBA) molecules on the Au nanoflake surfaces.
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Affiliation(s)
- Ying Su
- Beijing National Laboratory for Molecular Sciences, Key Lab of Colloid and Interface Science, Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Zhong Guan Cun, Beijing, 100190 PR China
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Sanghamitra NJ, Varghese N, Rao C. Effect of curcumin and Cu2+/Zn2+ ions on the fibrillar aggregates formed by the amyloid peptide and other peptides at the organic–aqueous interface. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.07.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Krishnaswamy R, Sood AK. Growth, self-assembly and dynamics of nano-scale films at fluid interfaces. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b916489h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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