1
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Madejová J, Barlog M, Slaný M, Bashir S, Scholtzová E, Tunega D, Jankovič Ľ. Advanced materials based on montmorillonite modified with poly(ethylenimine) and poly(2-methyl-2-oxazoline): Experimental and DFT study. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2
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Self-affinity of AuNPs on polyethyleneimine (PEI) functionalized polypyrrole-derived carbon nanotubes hybrid nanocomposite: A novel interference-free electrochemical sensing platform for caffeine detection. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Mustafa R, Fitian M, Hamilton NB, Li J, Silva WR, Punihaole D. Molecular Insights into the Binding of Linear Polyethylenimines and Single-Stranded DNA Using Raman Spectroscopy: A Quantitative Approach. J Phys Chem B 2022; 126:8404-8414. [PMID: 36222425 PMCID: PMC10413332 DOI: 10.1021/acs.jpcb.2c04939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Establishing how polymeric vectors such as polyethylenimine (PEI) bind and package their nucleic acid cargo is vital toward developing more efficacious and cost-effective gene therapies. To develop a molecular-level picture of DNA binding, we examined how the Raman spectra of PEIs report on their local chemical environment. We find that the intense Raman bands located in the 1400-1500 cm-1 region derive from vibrations with significant CH2 scissoring and NH bending character. The Raman bands that derive from these vibrations show profound intensity changes that depend on both the local dielectric environment and hydrogen bonding interactions with the secondary amine groups on the polymer. We use these bands as spectroscopic markers to assess the binding between low molecular weight PEIs and single-stranded DNA (ssDNA). Analysis of the Raman spectra suggest that PEI primarily binds via electrostatic interactions to the phosphate backbone, which induces the condensation of the ssDNA. We additionally confirm this finding by conducting molecular dynamics simulations. We expect that the spectral correlations determined here will enable future studies to investigate important gene delivery activities, including how PEI interacts with cellular membranes to facilitate cargo internalization into cells.
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Affiliation(s)
- Rusul Mustafa
- Department of Chemistry, University of Vermont, Burlington, Vermont05405, United States
| | - Maria Fitian
- Department of Chemistry and Biochemistry, Siena College, Loudonville, New York12211, United States
| | - Nicholas B Hamilton
- Department of Chemistry, University of Vermont, Burlington, Vermont05405, United States
| | - Jianing Li
- Department of Chemistry, University of Vermont, Burlington, Vermont05405, United States
| | - W Ruchira Silva
- Department of Chemistry and Biochemistry, Siena College, Loudonville, New York12211, United States
| | - David Punihaole
- Department of Chemistry, University of Vermont, Burlington, Vermont05405, United States
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4
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Grenda K, Idström A, Evenäs L, Persson M, Holmberg K, Bordes R. An analytical approach to elucidate the architecture of polyethyleneimines. J Appl Polym Sci 2022. [DOI: 10.1002/app.51657] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Kinga Grenda
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Göteborg Sweden
| | - Alexander Idström
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Göteborg Sweden
| | - Lars Evenäs
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Göteborg Sweden
| | | | - Krister Holmberg
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Göteborg Sweden
| | - Romain Bordes
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Göteborg Sweden
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5
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Tadjenant Y, Dokhan N, Barras A, Addad A, Jijie R, Szunerits S, Boukherroub R. Graphene oxide chemically reduced and functionalized with KOH-PEI for efficient Cr(VI) adsorption and reduction in acidic medium. CHEMOSPHERE 2020; 258:127316. [PMID: 32559494 DOI: 10.1016/j.chemosphere.2020.127316] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 05/30/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
In this study, graphene oxide (GO), polyethyleneimine (PEI) and potassium hydroxide (KOH) were used to synthesize reduced graphene oxide (rGO/PEI-KOH) nanocomposite. The presence and grafting of PEI molecules on the reduced GO surface were assessed by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) analyses. The rGO/PEI-KOH nanocomposite was successfully applied for hexavalent chromium, Cr(VI), wastewater elimination. The resulting rGO/PEI-KOH adsorbent was found to be highly effective for Cr(VI) removal at low pH values and achieved a maximum capacity of experimental adsorption of 398.9 mg/g, which is one of the highest sorption capacity of most GO- and PEI-based adsorbents reported in the literature up to date. Studying the adsorption mechanism, the sorption isotherm revealed that the modified-Langmuir model was the best fit and Cr(VI) removal follows a pseudo-second-order kinetics, with the predominance of intraparticle diffusion during the first step of adsorption. XPS analysis indicated the presence of appreciable amount of Cr(III) on the adsorbent surface, which suggests that the adsorbed Cr(VI) ions were effectively reduced to Cr(III) on the rGO/PEI-KOH adsorbent surface (∼70% of the total adsorbed Cr). Cr(VI) adsorption and subsequent reduction to Cr(III) both contributed to the Cr(VI) removal. The results of the present study highlight the benefits of rGO/PEI-KOH like low cost, environmentally friendly, large toxic Cr(VI) ions adsorption capacity and its effective reduction to less-toxic Cr(III).
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Affiliation(s)
- Yasmine Tadjenant
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France; Research Unit, Materials, Processes and Environment (URMPE), University of Boumerdes, Algeria
| | - Nahed Dokhan
- Research Unit, Materials, Processes and Environment (URMPE), University of Boumerdes, Algeria
| | - Alexandre Barras
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France
| | - Ahmed Addad
- Univ. Lille, CNRS, UMR 8207 - UMET, F-59000 Lille, France
| | - Roxana Jijie
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France
| | - Sabine Szunerits
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France
| | - Rabah Boukherroub
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France.
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6
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Tan ND, Yin JH, Yuan Y, Meng L, Xu N. One-Pot Hydrothermal Synthesis of Highly Fluorescent Polyethyleneimine-capped Copper Nanoclusters for Specific Detection of Rifampicin. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nai-Di Tan
- College of Chemistry and Pharmaceutical Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
| | - Jian-Hang Yin
- College of Materials Science and Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
| | - Yaqing Yuan
- College of Materials Science and Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
| | - Lei Meng
- College of Materials Science and Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
- College of Sciences; Jilin Institute of Chemical Technology; Jilin 132022 China
| | - Na Xu
- College of Materials Science and Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
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7
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Wang W, Naolou T, Ma N, Deng Z, Xu X, Mansfeld U, Wischke C, Gossen M, Neffe AT, Lendlein A. Polydepsipeptide Block-Stabilized Polyplexes for Efficient Transfection of Primary Human Cells. Biomacromolecules 2017; 18:3819-3833. [PMID: 28954190 DOI: 10.1021/acs.biomac.7b01034] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The rational design of a polyplex gene carrier aims to balance maximal effectiveness of nucleic acid transfection into cells with minimal adverse effects. Depsipeptide blocks with an Mn ∼ 5 kDa exhibiting strong physical interactions were conjugated with PEI moieties (2.5 or 10 kDa) to di- and triblock copolymers. Upon nanoparticle formation and complexation with DNA, the resulting polyplexes (sizes typically 60-150 nm) showed remarkable stability compared to PEI-only or lipoplex and facilitated efficient gene delivery. Intracellular trafficking was visualized by observing fluorescence-labeled pDNA and highlighted the effective cytoplasmic uptake of polyplexes and release of DNA to the perinuclear space. Specifically, a triblock copolymer with a middle depsipeptide block and two 10 kDa PEI swallowtail structures mediated the highest levels of transgenic VEGF secretion in mesenchymal stem cells with low cytotoxicity. These nanocarriers form the basis for a delivery platform technology, especially for gene transfer to primary human cells.
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Affiliation(s)
- Weiwei Wang
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
| | - Toufik Naolou
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
| | - Nan Ma
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany.,Institute of Chemistry and Biochemistry, Freie Universität Berlin , 14195 Berlin, Germany
| | - Zijun Deng
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany.,Institute of Chemistry and Biochemistry, Freie Universität Berlin , 14195 Berlin, Germany
| | - Xun Xu
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany.,Institute of Chemistry and Biochemistry, Freie Universität Berlin , 14195 Berlin, Germany
| | - Ulrich Mansfeld
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
| | - Christian Wischke
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
| | - Manfred Gossen
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
| | - Axel T Neffe
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany.,Institute of Chemistry, University of Potsdam , 14476 Potsdam, Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies , Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany.,Institute of Chemistry and Biochemistry, Freie Universität Berlin , 14195 Berlin, Germany.,Institute of Chemistry, University of Potsdam , 14476 Potsdam, Germany
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8
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Rheiner S, Reichel D, Rychahou P, Izumi T, Yang HS, Bae Y. Polymer nanoassemblies with hydrophobic pendant groups in the core induce false positive siRNA transfection in luciferase reporter assays. Int J Pharm 2017. [PMID: 28629980 DOI: 10.1016/j.ijpharm.2017.06.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Poly(ethylene glycol)-conjugated polyethylenimine (PEG-PEI) is a widely studied cationic polymer used to develop non-viral vectors for siRNA therapy of genetic disorders including cancer. Cell lines stably expressing luciferase reporter protein typically evaluate the transfection efficacy of siRNA/PEG-PEI complexes, however recent findings revealed that PEG-PEI can reduce luciferase expression independent of siRNA. This study elucidates a cause of the false positive effect in luciferase assays by using polymer nanoassemblies (PNAs) made from PEG, PEI, poly-(l-lysine) (PLL), palmitate (PAL), and deoxycholate (DOC): PEG-PEI (2P), PEG-PEI-PAL (3P), PEG-PLL (2P'), PEG-PLL-PAL (3P'), and PEG-PEI-DOC (2PD). In vitro transfection and western blot assays of luciferase using a colorectal cancer cell line expressing luciferase (HT29/LUC) concluded that 2P and 2P' caused no luciferase expression reduction while hydrophobically modified PNAs induced a 35-50% reduction (3P'<2PD<3P). Although cell viability remained stagnant, 3P triggered cellular stress responses including increased membrane porosity and decreased ATP and cellular protein concentrations. Raman spectroscopy suggested that hydrophobic groups influence PNA conformation changes, which may have caused over-ubiquitination and degradation of luciferase in the cells. These results indicate that hydrophobically modified PEG-PEI induces cellular distress causing over-ubiquitination of the luciferase protein, producing false positive siRNA transfection in the luciferase assay.
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Affiliation(s)
- Steven Rheiner
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone, Lexington, KY 40536, USA
| | - Derek Reichel
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone, Lexington, KY 40536, USA
| | - Piotr Rychahou
- Markey Cancer Center, University of Kentucky, 800 Rose Street, CC140, Lexington, KY 40536, USA; Department of Surgery, College of Medicine, University of Kentucky, 741 South Limestone, Lexington, KY 40536, USA
| | - Tadahide Izumi
- Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, 1095 V.A. Drive, Lexington, KY 40536, USA
| | - Hsin-Sheng Yang
- Markey Cancer Center, University of Kentucky, 800 Rose Street, CC140, Lexington, KY 40536, USA; Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, 1095 V.A. Drive, Lexington, KY 40536, USA
| | - Younsoo Bae
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone, Lexington, KY 40536, USA.
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9
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Fox SJ, Fazil MHUT, Dhand C, Venkatesh M, Goh ETL, Harini S, Eugene C, Lim RR, Ramakrishna S, Chaurasia SS, Beuerman RW, Verma CS, Verma NK, Loh XJ, Lakshminarayanan R. Insight into membrane selectivity of linear and branched polyethylenimines and their potential as biocides for advanced wound dressings. Acta Biomater 2016; 37:155-64. [PMID: 27079762 DOI: 10.1016/j.actbio.2016.04.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 04/08/2016] [Accepted: 04/09/2016] [Indexed: 12/14/2022]
Abstract
UNLABELLED We report here structure-property relationship between linear and branched polyethylene imines by examining their antimicrobial activities against wide range of pathogens. Both the polymers target the cytoplasmic membrane of bacteria and yeasts, eliciting rapid microbicidal properties. Using multiscale molecular dynamic simulations, we showed that, in both fully or partially protonated forms LPEI discriminates between mammalian and bacterial model membranes whereas BPEI lacks selectivity for both the model membranes. Simulation results suggest that LPEI forms weak complex with the zwitterionic lipids whereas the side chain amino groups of BPEI sequester the zwitterionic lipids by forming tight complex. Consistent with these observations, label-free cell impedance measurements, cell viability assays and high content analysis indicate that BPEI is cytotoxic to human epithelial and fibroblasts cells. Crosslinking of BPEI onto electrospun gelatin mats attenuate the cytotoxicity for fibroblasts while retaining the antimicrobial activity against Gram-positive and yeasts strains. PEI crosslinked gelatin mats elicit bactericidal activity by contact-mediated killing and durable to leaching for 7days. The potent antimicrobial activity combined with enhanced selectivity of the crosslinked ES gelatin mats would expand the arsenel of biocides in the management of superficial skin infections. The contact-mediated microbicidal properties may avert antimicrobial resistance and expand the diversity of applications to prevent microbial contamination. STATEMENT OF SIGNIFICANCE Current commercially available advanced wound dressings are either impregnated with metallic silver or silver salts which have side effects or may not avert antimicrobial resistance. In this article, we have used multidisciplinary approach comprising of computational, chemical and biological methods to understand the antimicrobial properties and biocompatibility of linear (LPEI) and branched (BPEI) polyethylenimines. We then applied this knowledge to develop dual purpose wound dressings containing these polymers, which encourages healing while maintain antimicrobial activity. In addition, the approach can be expanded to rationalize the antimicrobial vs. cytotoxicity of other cationic polymers and the method of crosslinking would enhance their potentials as biocides for advanced materials.
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10
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Huang X, Ishitobi H, Inouye Y. Formation of fluorescent platinum nanoclusters using hyper-branched polyethylenimine and their conjugation to antibodies for bio-imaging. RSC Adv 2016. [DOI: 10.1039/c5ra24522b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Fluorescent Pt NCs@PEI were formed in the cavities coiled by PEI ligands and bio-imaged HeLa cells via conjugation with antibodies.
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Affiliation(s)
- Xin Huang
- Graduate School of Frontier Biosciences
- Osaka University
- Suita
- Japan
| | - Hidekazu Ishitobi
- Graduate School of Frontier Biosciences
- Osaka University
- Suita
- Japan
- Department of Applied Physics
| | - Yasushi Inouye
- Graduate School of Frontier Biosciences
- Osaka University
- Suita
- Japan
- Department of Applied Physics
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11
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Papa AL, Boudon J, Bellat V, Loiseau A, Bisht H, Sallem F, Chassagnon R, Bérard V, Millot N. Dispersion of titanate nanotubes for nanomedicine: comparison of PEI and PEG nanohybrids. Dalton Trans 2015; 44:739-46. [PMID: 25408156 DOI: 10.1039/c4dt02552k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In the present study, we report the dispersion of titanate nanotubes (TiONts) via polymer grafting (PolyEthylene Glycol, PEG) or polymer adsorption (polyethylene imine, PEI) where different TiONts/polymer ratios have been investigated. The TiONts/PEI and TiONts/PEG nanohybrids were characterized by scanning and transmission electron microscopy as well as by zeta potential measurements in order to determine both their dispersion state and stability in water (at different pH for zetametry). The nature of the chemical bonds at the surface of these nanohybrids was investigated by Fourier-transformed infrared (FTIR) spectroscopy while the grafting densities of PEG on the nanotubes were quantified by thermogravimetric analyses (TGA). The nanohybrids reported here are promising tools for biotechnology applications due to their tubular morphology, their very good dispersion in water and the reactivity of their surface.
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Affiliation(s)
- Anne-Laure Papa
- Nanosciences Department, Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS/Université de Bourgogne, BP 47 870, F-21 078 Dijon, France.
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12
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Zhang G, Dang L, Li L, Wang R, Fu H, Shi K. Design and construction of Co3O4/PEI–CNTs composite exhibiting fast responding CO sensor at room temperature. CrystEngComm 2013. [DOI: 10.1039/c3ce40206a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Suresh V, Jayaraman S, Jailani MIBM, Srinivasan MP. In situ application of polyelectrolytes in zinc oxide nanorod synthesis: understanding the effects on the structural and optical characteristics. J Colloid Interface Sci 2012; 394:13-9. [PMID: 23352700 DOI: 10.1016/j.jcis.2012.11.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 10/07/2012] [Accepted: 11/13/2012] [Indexed: 11/25/2022]
Abstract
We report a facile and simple means of synthesizing a macroscopic array of ZnO nanorods with high feature densities using a modified hydrothermal approach that involves the in situ introduction of polyelectrolyte. The ZnO nanorod arrays with heights of 1.5 μm and diameters of 350 nm were consistently reproducible and were bestowed with the advantage of in situ process tunability offered by employing polyethylenimine (PEI) as a surface modifying agent. The fabrication combines benefits from the hydrothermal approach in terms of process simplicity and flexibility and from the use polyelectrolyte that offers a better nanorod surface, quenched defect levels and enhancement of the UV band edge emission. Structural and elemental analysis of the PEI-modified and unmodified nanorods emphasize the fact that the intentional introduction of PEI results in a nanorod with better surface quality as evidenced by photoluminescence (PL) spectra. The tunability of the feature dimensions of the nanorods and an analysis of the bulk and surface (surface defect) responses to the PL point to significant promise of high density orthogonal nanorods in a number of optoelectronic applications. While the defects in the ZnO nanorods can point towards the application of ZnO nanorods in charge trap flash memory devices, highly crystalline, size tunable, high aspect ratio nanorods find applications as building components in solid state lighting.
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Affiliation(s)
- Vignesh Suresh
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576, Singapore
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14
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Li C, Su Y, Lv X, Xia H, Shi H, Yang X, Zhang J, Wang Y. Controllable anchoring of gold nanoparticles to polypyrrole nanofibers by hydrogen bonding and their application in nonenzymatic glucose sensors. Biosens Bioelectron 2012; 38:402-6. [DOI: 10.1016/j.bios.2012.04.049] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 04/12/2012] [Accepted: 04/13/2012] [Indexed: 10/28/2022]
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15
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Herlem G, Gharbi T, Sedrine NB. Analyzing ab initio infrared spectra and electronic properties of polyethylenimine water complexes in the solid state. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.theochem.2010.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Swierczewska M, Hajicharalambous C, Janorkar A, Megeed Z, Yarmush M, Rajagopalan P. Cellular response to nanoscale elastin-like polypeptide polyelectrolyte multilayers. Acta Biomater 2008; 4:827-37. [PMID: 18178532 DOI: 10.1016/j.actbio.2007.11.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2007] [Revised: 10/31/2007] [Accepted: 11/02/2007] [Indexed: 10/22/2022]
Abstract
Ionic elastin-like polypeptide (ELP) conjugates are a new class of biocompatible, self-assembling biomaterials. ELPs composed of the repeat unit (GVGVP)(n) are derived from the primary sequence of mammalian elastin and produced in Escherichia coli. These biopolymers exhibit an inverse transition temperature that renders them extremely useful for applications in cell-sheet engineering. Cationic and anionic conjugates were synthesized by the chemical coupling of ELP to polyethyleneimine (PEI) and polyacrylic acid (PAA). The self-assembly of ELP-PEI and ELP-PAA using the layer-by-layer deposition of alternately charged polyelectrolytes is a simple, versatile technique to generate bioactive and biomimetic surfaces with the ability to modulate cell-substratum interactions. Our studies are focused on cellular response to self-assembled multilayers of ionic (GVGVP)(40) incorporated within the polymeric sequence H(2)N-MVSACRGPG-(GVGVP)(40)-WP-COOH. Angle-dependent XPS studies indicated a difference in the chemical composition at the surface ( approximately 10A below the surface) and subsurface regions. These studies provided additional insight into the growth of the nanoscale multilayer assembly as well as the chemical environment that the cells can sense. Overall, cellular response was enhanced on glass substrata coated with ELP conjugates compared with uncoated surfaces. We report significant differences in cell proliferation, focal adhesions and cytoskeletal organization as a function of the number of bilayers in each assembly. These multilayer assemblies have the potential to be successfully utilized in the rational design of coatings on biomaterials to elicit a desired cellular response.
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Yang Z, Coutinho DH, Yang DJ, Balkus KJ, Ferraris JP. Proton-conducting membranes based on HTFSI-doped PEI/SiO2 nanocomposites. J Memb Sci 2008. [DOI: 10.1016/j.memsci.2007.12.072] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Unal B, Klein RJ, Yocca KR, Hedden RC. Influence of DGEBA crosslinking on Li+ ion conduction in poly(ethyleneimine) gels. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Lee KY, Hwang J, Lee YW, Kim J, Han SW. One-step synthesis of gold nanoparticles using azacryptand and their applications in SERS and catalysis. J Colloid Interface Sci 2007; 316:476-81. [PMID: 17727872 DOI: 10.1016/j.jcis.2007.07.076] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2007] [Revised: 07/28/2007] [Accepted: 07/31/2007] [Indexed: 11/24/2022]
Abstract
A new aqueous-phase method for the preparation of stable gold nanoparticles by using 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosane (azacryptand) as both reductant and stabilizer is reported. Reduction of HAuCl(4) with azacryptand at room temperature yields nano-sized particles within a short time. The obtained gold nanoparticles have been characterized by UV-vis spectroscopy, transmission electron microscopy, and X-ray diffraction. Comparison of FT-IR spectra of azacryptand before and after reaction revealed that azacryptand molecules reduce gold ions as the amino moieties in the molecules are oxidized to imino groups. The prepared gold nanoparticles show efficient surface-enhanced Raman scattering properties and can effectively catalyze reduction of 4-nitrophenol by sodium borohydride in aqueous solution.
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Affiliation(s)
- Kang Yeol Lee
- Department of Chemistry, Research Institute of Natural Science, Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju 660-701, Korea
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20
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Park C, Oh K, Lee S, Kim C. Controlled Release of Guest Molecules from Mesoporous Silica Particles Based on a pH-Responsive Polypseudorotaxane Motif. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603404] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Park C, Oh K, Lee SC, Kim C. Controlled Release of Guest Molecules from Mesoporous Silica Particles Based on a pH-Responsive Polypseudorotaxane Motif. Angew Chem Int Ed Engl 2007; 46:1455-7. [PMID: 17221893 DOI: 10.1002/anie.200603404] [Citation(s) in RCA: 403] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chiyoung Park
- Department of Polymer Science and Engineering, Hyperstructured Organic Materials Research Center, Inha University, Incheon 402-751, South Korea
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Cai K, Ode M, Murakami H. Influence of polyelectrolyte dispersants on the surface chemical properties of aluminum in aqueous suspension. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2006.03.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Choi HS, Ooya T, Lee SC, Sasaki S, Kurisawa M, Uyama H, Yui N. pH Dependence of Polypseudorotaxane Formation between Cationic Linear Polyethylenimine and Cyclodextrins. Macromolecules 2004. [DOI: 10.1021/ma049215+] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sanders RA, Frech R, Khan MA. Crystalline and Solution Phases in N,N,N‘,N‘,N‘ ‘-Pentamethyldiethylenetriamine with LiCF3SO3 and NaCF3SO3. J Phys Chem B 2004. [DOI: 10.1021/jp0313526] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rebecca A. Sanders
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Roger Frech
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Masood A. Khan
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
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