1
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Laus M, Chiarcos R, Gianotti V, Antonioli D, Sparnacci K, Munaò G, Milano G, De Nicola A, Perego M. Evidence of Mechanochemical Control in “Grafting to” Reactions of Hydroxy-Terminated Statistical Copolymers. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c02142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Michele Laus
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Universitá del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, Alessandria 15121, Italy
| | - Riccardo Chiarcos
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Universitá del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, Alessandria 15121, Italy
| | - Valentina Gianotti
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Universitá del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, Alessandria 15121, Italy
| | - Diego Antonioli
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Universitá del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, Alessandria 15121, Italy
| | - Katia Sparnacci
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Universitá del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, Alessandria 15121, Italy
| | - Gianmarco Munaò
- Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università degli Studi di Messina, Viale F. Stagno d’Alcontres 31, Messina 98166, Italy
| | - Giuseppe Milano
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan Yonezawa, Yamagata-ken 992-8510, Japan
| | - Antonio De Nicola
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan Yonezawa, Yamagata-ken 992-8510, Japan
| | - Michele Perego
- CNR-IMM, Unit of Agrate Brianza, Agrate Brianza 20864, Italy
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2
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Wetzler SP, Miller KA, Kisley L, Stanton ALD, Braun PV, Bailey RC. Real-Time Measurement of Polymer Brush Dynamics Using Silicon Photonic Microring Resonators: Analyte Partitioning and Interior Brush Kinetics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10351-10360. [PMID: 32852216 DOI: 10.1021/acs.langmuir.0c01336] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polymer brushes are found in biomedical and industrial technologies, where they exhibit functionalities considerably dependent on polymer brush-solvent-analyte interactions. It remains a difficult challenge to quickly analyze solvent-swollen polymer brushes, both at the solvent-polymer brush interface and in the brush interior, as well as to monitor the kinetics of interaction of solvent-swollen brushes with key analytes. Here, we demonstrate the novel use of silicon photonic microring resonators to characterize in situ swollen polymer brush-analyte interactions. By monitoring resonant wavelength shifts, we find that brush-solvent-analyte interaction parameters can be extracted from a single set of data or from successive analyte introductions using a single brush-coated sensor. The partition coefficient of three industrially relevant plasticizers into hydrophobic and hydrophilic brushes was determined and found to be in agreement with known solubility trends. We found that the diffusion coefficient of the plasticizer into the brush decreases as brush thickness increases, supporting a model of a dense inner brush layer and diffuse outer layer. pKa's of pH-sensitive brushes were determined on the microring resonator platform; upon increasing the dry brush thickness, the pKa for poly(2-dimethylamino ethyl methacrylate) decreased from 8.5 to approach the bulk material pKa of 7.3 and showed dependence on the presence and concentration of salt. These proof-of-concept experiments show how the surface-sensitive nature of the microring resonator detection platform provides valuable information about the interaction of the polymer brushes with the solvents and analytes, not easily accessed by other techniques.
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Affiliation(s)
- Shannon P Wetzler
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Kali A Miller
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Lydia Kisley
- Beckman Institute, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Alexandra L D Stanton
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Paul V Braun
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Ryan C Bailey
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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3
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Qu F, Li D, Ma X, Chen F, Gautrot JE. A Kinetic Model of Oligonucleotide-Brush Interactions for the Rational Design of Gene Delivery Vectors. Biomacromolecules 2019; 20:2218-2229. [PMID: 31017767 DOI: 10.1021/acs.biomac.9b00155] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Polymer brushes are attractive candidates for the design of gene delivery vectors as they allow the systematic study of the impact of structural (type, size, and shape of nanomaterials core) and physicochemical parameters (cationic monomer chemistry, brush thickness, and grafting density) on transfection efficiency. However, relatively little is known of their interactions of oligonucleotides. To study such interactions, we use surface plasmon resonance and developed a kinetic model of brush binding and infiltration. We identify the striking impact that brush grafting density and thickness have on oligonucleotide kinetics of infiltration, binding affinity, and maximum loading. Surprisingly, double-stranded RNA molecules are found to load at significantly higher levels compared to DNA molecules of identical sequence (apart from uracils/thymines). Furthermore, analysis of the kinetics of adsorption of these oligonucleotides indicates that the stoichiometry of binding (ratio of amine versus phosphate residues) is close to parity for the uptake of 20 bp double-stranded RNA. Finally, nanoparticles were designed to be used as gene transfection vectors and to quantify if the brush grafting density and thickness significantly impact transfection efficiencies in a small interfering RNA knockdown assay. Therefore, this study demonstrates the rational design of polymer brush-based nanoparticle vectors for efficient delivery of oligonucleotides. The model developed will allow to uncover how the refinement of the physicochemical and structural properties of polymer brushes enable the tuning of RNA binding and allow the systematic study of cationic vectors efficiency for RNA delivery.
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Affiliation(s)
- Fengjin Qu
- Department of Applied Chemistry, School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an 710072 , PR China
| | | | - Xiaoyan Ma
- Department of Applied Chemistry, School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an 710072 , PR China
| | - Fang Chen
- Department of Applied Chemistry, School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an 710072 , PR China
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4
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Reese CM, Thompson BJ, Logan PK, Stafford CM, Blanton M, Patton DL. Sequential and one-pot post-polymerization modification reactions of thiolactone-containing polymer brushes. Polym Chem 2019; 10:10.1039/c9py01123d. [PMID: 32117471 PMCID: PMC7047779 DOI: 10.1039/c9py01123d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Thiolactone chemistry has garnered significant attention as a powerful post-polymerization modification (PPM) route to mutlifunctional polymeric materials. Here, we apply this versatile chemistry to the fabrication of ultrathin, multifunctional polymer surfaces via aminolysis and thiol-mediated double modifications of thiolactone-containing polymer brushes. Polymer brush surfaces were synthesized via microwave-assisted surface-initiated polymerization of DL-homocysteine thiolactone acrylamide. Aminolysis and thiol-Michael double modifications of the thiolactone-functional brush were explored using both sequential and one-pot reactions with bromobenzyl amine and 1H,1H-perfluoro-N-decyl acrylate. X-ray photoelectron spectroscopy and argon gas cluster ion sputter depth profiling enabled quantitative comparison of the sequential and one-pot PPM routes with regard to conversion and spatial distribution of functional groups immobilized throughout thickness of the brush. While one-pot conditions proved to be more effective in immobilizing the amine and acrylate within the brush, the sequenital reaction enabled the fabrication of multifunctional, micropattterned brush surfaces using reactive microcontact printing.
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Affiliation(s)
- Cassandra M Reese
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Brittany J Thompson
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Phillip K Logan
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Christopher M Stafford
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899
| | - Michael Blanton
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Derek L Patton
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
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5
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Zhang ZJ, Edmondson S, Mears M, Madsen J, Armes SP, Leggett GJ, Geoghegan M. Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution. Macromolecules 2018; 51:6312-6317. [PMID: 30174342 PMCID: PMC6117105 DOI: 10.1021/acs.macromol.8b01193] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 07/26/2018] [Indexed: 12/04/2022]
Abstract
![]()
The
diffusion of rhodamine-labeled poly(ethylene glycol) (r-PEG)
within surface-grafted poly(ethylene glycol) (s-PEG) layers in aqueous
solution at 18 °C was measured by fluorescence correlation spectroscopy.
The diffusion coefficient of r-PEG within s-PEG was controlled by
the grafting density, σ, and scaled as σ–1.42±0.09. It is proposed that a characteristic blob size associated with
the grafted (brush) layer defines the region through which the r-PEG
diffusion occurs. The diffusion coefficients for r-PEG in semidilute
solution were found to be similar to those in the brushes.
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Affiliation(s)
- Zhenyu J Zhang
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, U.K.,School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, U.K
| | - Steve Edmondson
- School of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Matthew Mears
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, U.K
| | - Jeppe Madsen
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Steven P Armes
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Graham J Leggett
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Mark Geoghegan
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, U.K
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6
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Matharu AS, Ahmed S, Almonthery B, Macquarrie DJ, Lee YS, Kim Y. Starbon/High-Amylose Corn Starch-Supported N-Heterocyclic Carbene-Iron(III) Catalyst for Conversion of Fructose into 5-Hydroxymethylfurfural. CHEMSUSCHEM 2018; 11:716-725. [PMID: 29281175 DOI: 10.1002/cssc.201702207] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 12/21/2017] [Indexed: 06/07/2023]
Abstract
Iron-N-heterocyclic carbene complexes (Fe-NHCs) have come to prominence because of their applicability in diverse catalytic reactions, ranging from C-C cross-coupling and C-X bond formation to substitution, reduction, polymerization, and dehydration reactions. The detailed synthesis, characterization, and application of novel heterogeneous Fe-NHC catalysts immobilized on mesoporous expanded high-amylose corn starch (HACS) and Starbon 350 (S350) for facile fructose conversion into 5-hydroxymethylfurfural (HMF) is reported. Both catalyst types showed good performance for the dehydration of fructose to HMF when the reaction was tested at 100 °C with varying time (10 min, 20 min, 0.5 h, 1 h, 3 h and 6 h). For Fe-NHC/S350, the highest HMF yield was 81.7 % (t=0.5 h), with a TOF of 169 h-1 , fructose conversion of 95 %, and HMF selectivity of 85.7 %, whereas for Fe-NHC/expanded HACS, the highest yield was 86 % (t=0.5 h), with a TOF of 206 h-1 , fructose conversion of 87 %, and HMF selectivity of 99 %. Iron loadings of 0.26 and 0.30 mmol g-1 were achieved for Fe-NHC/expanded starch and Fe-NHC/S350, respectively.
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Affiliation(s)
- Avtar S Matharu
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, YO10 5DD, UK
| | - Suleiman Ahmed
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, YO10 5DD, UK
| | - Badriya Almonthery
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, YO10 5DD, UK
| | - Duncan J Macquarrie
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, YO10 5DD, UK
| | - Yoon-Sik Lee
- School of Chemical and Biological Engineering, Seoul National University, 1 Kwanak-Ro, Kwanak-Gu, Seoul, 151-742, Republic of Korea
| | - Yohan Kim
- School of Chemical and Biological Engineering, Seoul National University, 1 Kwanak-Ro, Kwanak-Gu, Seoul, 151-742, Republic of Korea
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7
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Lü T, Zhang S, Qi D, Zhang D, Zhao H. Enhanced demulsification from aqueous media by using magnetic chitosan-based flocculant. J Colloid Interface Sci 2018; 518:76-83. [PMID: 29448228 DOI: 10.1016/j.jcis.2018.02.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 02/05/2018] [Accepted: 02/07/2018] [Indexed: 10/18/2022]
Abstract
A series of quaternized chitosan (QC)-grafted magnetic nanoparticles (MNPs) were successfully synthesized for demulsification from aqueous environments. Fe3O4 MNPs were synthesized by using a coprecipitation method, followed by surface coating with silica and aminopropyl to form a surface for further grafting of QC molecular chains. The synthetic magnetic flocculants were characterized by various technologies and their demulsification performances were evaluated in detail as a function of dosage, QC grafting ratio (Gq), pH and magnetic field. Results showed that pH did not significantly affect oil-water separation performance and MNPs with high Gq exhibited enhanced separation efficiency. The separation capacity was estimated to be >105 mg of diesel oil/mg of magnetic flocculant. Recycling experiment indicated the magnetic flocculant could be recycled up to at least 7 cycles at various pH levels. The grafted QC layer endowed the hybrid MNPs with permanent positive surface charges, thus allowing them to flocculate negatively charged oil droplets via electrostatic patching. The magnetic field could not only accelerate the separation of resulting flocs, but also remove the MNPs-coated dispersed oil droplets. In conclusion, QC-grafted MNPs provide a potentially new technique for developing environmentally friendly and highly efficient magnetic flocculant for practical demulsification applications.
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Affiliation(s)
- Ting Lü
- Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Shuang Zhang
- Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Dongming Qi
- Engineering Research Center of Eco-Dyeing and Finishing of Textiles of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Dong Zhang
- Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Hongting Zhao
- Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
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8
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Guo W, Reese CM, Xiong L, Logan PK, Thompson BJ, Stafford CM, Ievlev AV, Lokitz BS, Ovchinnikova OS, Patton DL. Buckling Instabilities in Polymer Brush Surfaces via Postpolymerization Modification. Macromolecules 2017; 50:8670-8677. [PMID: 29503464 PMCID: PMC5831323 DOI: 10.1021/acs.macromol.7b01888] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We report a simple route to engineer ultrathin polymer brush surfaces with wrinkled morphologies using post-polymerization modification (PPM), where the length scale of the buckled features can be tuned from hundreds of nanometers to one micrometer using PPM reaction time. We show that partial crosslinking of the outer layer of the polymer brush under poor solvent conditions is critical to obtain wrinkled morphologies upon swelling. Characterization of the PPM kinetics and swelling behavior via ellipsometry and the through-thickness composition profile via time-of-flight secondary ion mass spectroscopy (ToF-SIMS) provided keys insight into parameters influencing the buckling behavior.
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Affiliation(s)
- Wei Guo
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Cassandra M. Reese
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Li Xiong
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Phillip K. Logan
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Brittany J. Thompson
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
| | - Christopher M. Stafford
- Materials Science and Engineering Division, Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899
| | - Anton V. Ievlev
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN
| | - Bradley S. Lokitz
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN
| | - Olga S. Ovchinnikova
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN
| | - Derek L. Patton
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS 39406
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9
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Guo W, Xiong L, Reese CM, Amato DV, Thompson BJ, Logan PK, Patton DL. Post-polymerization modification of styrene–maleic anhydride copolymer brushes. Polym Chem 2017. [DOI: 10.1039/c7py01659j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Amine-anhydride reactions on polymer brushes provide a modular post-modification strategy to functional surfaces.
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Affiliation(s)
- Wei Guo
- School of Polymer Science and Engineering
- University of Southern Mississippi
- Hattiesburg
- USA
| | - Li Xiong
- School of Polymer Science and Engineering
- University of Southern Mississippi
- Hattiesburg
- USA
| | - Cassandra M. Reese
- School of Polymer Science and Engineering
- University of Southern Mississippi
- Hattiesburg
- USA
| | - Douglas V. Amato
- School of Polymer Science and Engineering
- University of Southern Mississippi
- Hattiesburg
- USA
| | - Brittany J. Thompson
- School of Polymer Science and Engineering
- University of Southern Mississippi
- Hattiesburg
- USA
| | - Phillip K. Logan
- School of Polymer Science and Engineering
- University of Southern Mississippi
- Hattiesburg
- USA
| | - Derek L. Patton
- School of Polymer Science and Engineering
- University of Southern Mississippi
- Hattiesburg
- USA
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10
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Durie K, Razavi MJ, Wang X, Locklin J. Nanoscale Surface Creasing Induced by Post-polymerization Modification. ACS NANO 2015; 9:10961-10969. [PMID: 26493442 DOI: 10.1021/acsnano.5b04144] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Creasing in soft polymeric films is a result of substantial compressive stresses that trigger instability beyond a critical strain and have been directly related to failure mechanisms in different materials. However, it has been shown that programming these instabilities into soft materials can lead to new applications, such as particle sorting, deformable capillaries, and stimuli-responsive interfaces. In this work, we present a method for fabricating reproducible nanoscale surface instabilities using reactive microcontacting printing (μCP) on activated ester polymer brush layers of poly(pentafluorophenyl acrylate). The sizes and structures of the nanoscale creases can be modulated by varying the grafting density of the brush substrate and pressure applied during μCP. Stress is generated in the film under confinement due to the molecular weight increase of the side chains during post-polymerization modification, which results in substantial in-plane growth in the film and leads to the observed nanoscale creases.
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Affiliation(s)
- Karson Durie
- Department of Chemistry, College of Engineering, and the Center for Nanoscale Science and Engineering, University of Georgia , Athens, Georgia 30602, United States
| | - Mir Jalil Razavi
- Department of Chemistry, College of Engineering, and the Center for Nanoscale Science and Engineering, University of Georgia , Athens, Georgia 30602, United States
| | - Xianqiao Wang
- Department of Chemistry, College of Engineering, and the Center for Nanoscale Science and Engineering, University of Georgia , Athens, Georgia 30602, United States
| | - Jason Locklin
- Department of Chemistry, College of Engineering, and the Center for Nanoscale Science and Engineering, University of Georgia , Athens, Georgia 30602, United States
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11
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12
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Rodda AE, Ercole F, Glattauer V, Gardiner J, Nisbet DR, Healy KE, Forsythe JS, Meagher L. Low Fouling Electrospun Scaffolds with Clicked Bioactive Peptides for Specific Cell Attachment. Biomacromolecules 2015; 16:2109-18. [DOI: 10.1021/acs.biomac.5b00483] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Andrew E. Rodda
- Department of Materials Science and Engineering & Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton 3168, Victoria, Australia
- Cooperative Research
Centre for Polymers, 8 Redwood Drive, Notting Hill 3168, Victoria, Australia
| | - Francesca Ercole
- Department of Materials Science and Engineering & Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology,
Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, 381
Royal Parade, Parkville 3052, Victoria, Australia
| | - Veronica Glattauer
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton 3168, Victoria, Australia
| | - James Gardiner
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton 3168, Victoria, Australia
| | - David R. Nisbet
- School
of Engineering, The Australian National University, Canberra 0200, Australian Capital Territory, Australia
| | - Kevin E. Healy
- Departments
of Bioengineering and Materials Science and Engineering, University of California at Berkeley, Berkeley, California, United States
| | - John S. Forsythe
- Department of Materials Science and Engineering & Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
| | - Laurence Meagher
- Department of Materials Science and Engineering & Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton 3168, Victoria, Australia
- Cooperative Research
Centre for Polymers, 8 Redwood Drive, Notting Hill 3168, Victoria, Australia
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13
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Neratova IV, Kreer T, Sommer JU. Translocation of Molecules with Different Architectures through a Brush-Covered Microchannel. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Irina V. Neratova
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, D-01069 Dresden, Germany
- Institut
für Theoretische Physik, Technische Universität Dresden, Zellescher Weg 17, D-01069 Dresden, Germany
| | - Torsten Kreer
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, D-01069 Dresden, Germany
| | - Jens-Uwe Sommer
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, D-01069 Dresden, Germany
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14
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Krishnamoorthy M, Hakobyan S, Ramstedt M, Gautrot JE. Surface-initiated polymer brushes in the biomedical field: applications in membrane science, biosensing, cell culture, regenerative medicine and antibacterial coatings. Chem Rev 2014; 114:10976-1026. [PMID: 25353708 DOI: 10.1021/cr500252u] [Citation(s) in RCA: 384] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mahentha Krishnamoorthy
- Institute of Bioengineering and ‡School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
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15
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Facile preparation of SiO2 hybrid nanoparticles via Cu2+-amine redox-initiated radical polymerization. Polym Bull (Berl) 2014. [DOI: 10.1007/s00289-014-1209-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Pérez-Perrino M, Navarro R, Prucker O, Rühe J. Binding of Functionalized Polymers to Surface-Attached Polymer Networks Containing Reactive Groups. Macromolecules 2014. [DOI: 10.1021/ma500282b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mónica Pérez-Perrino
- Instituto de Ciencia
yTecnología de Polímeros (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Rodrigo Navarro
- Instituto de Ciencia
yTecnología de Polímeros (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Oswald Prucker
- Laboratory for Chemistry & Physics of Interfaces, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79085 Freiburg, Germany
| | - Jürgen Rühe
- Laboratory for Chemistry & Physics of Interfaces, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79085 Freiburg, Germany
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17
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Tao F, Chen X, Zhai G. Stimuli-Responsive SiO2-graft-Poly(sodium acrylate) Hybrid Nanoparticles via Cu2+-Amine Redox-Initiated Radical Polymerization. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300455] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Feng Tao
- Department of Materials Science and Engineering; Changzhou University; Changzhou 213164 China
| | - Xiaobo Chen
- Department of Materials Science and Engineering; Changzhou University; Changzhou 213164 China
| | - Guangqun Zhai
- Department of Materials Science and Engineering; Changzhou University; Changzhou 213164 China
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18
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Li A, Ramakrishna SN, Schwarz T, Benetti EM, Spencer ND. Tuning surface mechanical properties by amplified polyelectrolyte self-assembly: where "grafting-from" meets "grafting-to". ACS APPLIED MATERIALS & INTERFACES 2013; 5:4913-4920. [PMID: 23656703 DOI: 10.1021/am4006379] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report the interaction of surface-tethered weak polyacid brushes, poly(methacrylic acid), with a weak polybase poly(L-lysine)-graft-poly(ethylene glycol), in solution. The grafted polyacid brushes, grown directly from the silicon substrate by UVLED surface-initiated polymerization, act as a nanotemplate for the solution-phase polybase, which penetrates into the brushes, forming a polyelectrolyte complex (PEC), whose mechanical and nanotribological properties are markedly influenced by the electrostatic assembly conditions. The mechanical effects are amplified due to the architecture of the specific polybase used, which contributes approximately 2k Da per unit charge to the overall system, resulting in an efficient filling of the polyacid brushes, which thus acts as a scaffold. The distribution of the adsorbed copolymers in the PEC films has been investigated by means of confocal microscopy. The unique structure of the PEC films provides a system whose mechanical and nanotribological properties can be tuned over a wide range.
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Affiliation(s)
- Ang Li
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Zurich, Switzerland
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19
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Arnold RM, Locklin J. Self-sorting click reactions that generate spatially controlled chemical functionality on surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5920-5926. [PMID: 23581996 DOI: 10.1021/la4012857] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This Article describes the generation of a patterned surface that can be postpolymerization modified to incorporate fragile macromolecules or delicate biomolecules without the need for special equipment. Two monomers that undergo different click reactions, pentafluorophenyl acrylate (PFPA) and 4-(trimethylsilyl) ethynylstyrene (TMSES), were sequentially polymerized from a silicon surface in the presence of a shadowmask with UV light, generating 12.5 and 62 μm pitch patterns. Two different dyes, 1-aminomethylpyrene (AMP) and 5-azidofluorescein (AF), were covalently attached to the polymer brushes through aminolysis and dual desilylation/copper(I)-catalyzed alkyne/azide cycloaddition (CuAAC) in one pot. Unlike most CuAAC reactions, the terminal alkyne of TMSES was not deprotected prior to functionalization. Although a 2 nm thickness increase was observed for poly(PFPA) brushes after polymerization of TMSES, cross-contamination was not visible through fluorescence microscopy after functionalization.
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Affiliation(s)
- Rachelle M Arnold
- Department of Chemistry, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
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20
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Schmitt SK, Murphy WL, Gopalan P. Crosslinked PEG mats for peptide immobilization and stem cell adhesion. J Mater Chem B 2013; 1:1349-1360. [PMID: 32260808 DOI: 10.1039/c2tb00253a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We have designed a lightly crosslinked PEG based copolymer coating with compositional flexibility as well as extended stability for studying human mesenchymal stem cells (hMSCs). Copolymers contain a majority of poly(ethylene glycol) methyl ether methacrylate (PEGMEMA) as a cytophobic background with poly(ethylene glycol) methacrylate (PEGMA) for peptide coupling, and less than 10% glycidyl methacrylate (GMA) for crosslinking. Copolymer thin films were crosslinked into 30 nm thick mats by either thermal treatment or ultraviolet light and were stable for 35 days in water at 37 °C. The amount of PEGMA in the copolymer was optimized to ∼11% to minimize non-specific cell-protein interactions while maximizing the amount of total bound peptides. Following the binding of RGDSP to the mat, hMSCs were seeded. The hMSC adhesion, spreading and focal adhesion complex formation were promoted in a concentration dependent manner. Mats coupled with a non-adhesive scramble (RDGSP) maintained their cytophobicity. Competitive detachment experiments further demonstrated that cell adhesion was mediated by receptor binding to the RGDSP peptide. Cell culture experiments performed at 1 and 2 weeks show that mats can still resist cell adhesion after incubation in a serum containing medium. X-ray photoelectron spectroscopy (XPS) was effectively used to quantify the average total peptide concentration as 12.6 ± 6.14 pmol cm-2. A square 2.2 mm N (1s) element map shows an average value of 17.9 pmol cm-2 of RGDSP, which correlates well with the multipoint high resolution data. The stability of the copolymer, compositional flexibility, ease of application and the ability to precisely quantify bound peptides on the mats make these materials ideal for the study of cellular processes, where stability, functionality and topography of the biointerface are relevant.
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Affiliation(s)
- Samantha K Schmitt
- Department of Material Science and Engineering, University of Wisconsin, Madison, WI 53706, USA.
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21
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CuSO 4-AMINE REDOX-INITIATED GRAFT POLYMERIZATION FROM GLASS SUBSTRATE SURFACES. ACTA POLYM SIN 2012. [DOI: 10.3724/sp.j.1105.2012.12050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Saha S, Bruening ML, Baker GL. Surface-initiated Polymerization of Azidopropyl Methacrylate and its Film Elaboration via Click Chemistry. Macromolecules 2012; 45:10.1021/ma301556v. [PMID: 24293702 PMCID: PMC3843497 DOI: 10.1021/ma301556v] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Azidopropyl methacrylate (AzPMA), a functional monomer with a pendent azido group, polymerizes from surfaces and provides polymer brushes amenable to subsequent elaboration via click chemistry. In DMF at 50 °C, click reactions between poly(AzPMA) brushes and an alkynylated dye proceed with >90% conversion in a few minutes. However, in aqueous solutions, reaction with an alkyne-containing poly(ethylene glycol) methyl ether (mPEG, Mn=5000) gives <10% conversion after a 12-h reaction at room temperature. Formation of copolymers with AzPMA and polyethylene glycol methyl ether methacrylate (mPEGMA) enables control over the hydrophilicity and functional group density in the copolymer to increase the yield of aqueous click reactions. The copolymers show reaction efficiencies as high as 60%. These studies suggest that for aqueous applications such as bioconjugation via click chemistry, control over brush hydrophilicity is vital.
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Affiliation(s)
- Sampa Saha
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
| | - Merlin L. Bruening
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
| | - Gregory L. Baker
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
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23
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Orski SV, Sheppard GR, Arumugam S, Arnold RM, Popik VV, Locklin J. Rate determination of azide click reactions onto alkyne polymer brush scaffolds: a comparison of conventional and catalyst-free cycloadditions for tunable surface modification. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14693-702. [PMID: 23009188 DOI: 10.1021/la3032418] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The postpolymerization functionalization of poly(N-hydroxysuccinimide 4-vinylbenzoate) brushes with reactive alkynes that differ in relative rates of activity of alkyne-azide cycloaddition reactions is described. The alkyne-derived polymer brushes undergo "click"-type cycloadditions with azido-containing compounds by two mechanisms: a strain-promoted alkyne-azide cycloaddition (SPAAC) with dibenzocyclooctyne (DIBO) and azadibenzocyclooctyne (ADIBO) or a copper-catalyzed alkyne-azide cycloaddition (CuAAC) to a propargyl group (PPG). Using a pseudo-first-order limited rate equation, rate constants for DIBO, ADIBO, and PPG-derivatized polymer brushes functionalized with an azide-functionalized dye were calculated as 7.7 × 10(-4), 4.4 × 10(-3), and 2.0 × 10(-2) s(-1), respectively. The SPAAC click reactions of the surface bound layers were determined to be slower than the equivalent reactions in solution, but the relative ratio of the reaction rates for the DIBO and ADIBO SPAAC reactions was consistent between solution and the polymer layer. The rate of functionalization was not influenced by the diffusion of azide into the polymer scaffold as long as the concentration of azide in solution was sufficiently high. The PPG functionalization by CuAAC had an extremely fast rate, which was comparable to other surface click reaction rates. Preliminary studies of dilute solution azide functionalization indicate that the diffusion-limited regime of brush functionalization impacts a 50 nm polymer brush layer and decreases the pseudo-first-order rate by a constant diffusion-limited factor of 0.233.
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Affiliation(s)
- Sara V Orski
- Department of Chemistry, College of Engineering, and the Center for Nanoscale Science and Engineering, University of Georgia , Athens, Georgia 30602, USA
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24
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Lokitz BS, Wei J, Hinestrosa JP, Ivanov I, Browning JF, Ankner JF, Kilbey SM, Messman JM. Manipulating Interfaces through Surface Confinement of Poly(glycidyl methacrylate)-block-poly(vinyldimethylazlactone), a Dually Reactive Block Copolymer. Macromolecules 2012. [DOI: 10.1021/ma300991p] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Bradley S. Lokitz
- Center for Nanophase Materials
Sciences, Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
| | - Jifeng Wei
- Department of Chemistry, Grinnell College, Grinnell, Iowa 50112, United States
| | - Juan Pablo Hinestrosa
- Center for Nanophase Materials
Sciences, Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
| | - Ilia Ivanov
- Center for Nanophase Materials
Sciences, Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
| | - James F. Browning
- Spallation Neutron Source, Oak Ridge National Laboratory, One Bethel Valley Road,
Oak Ridge, Tennessee 37831, United States
| | - John F. Ankner
- Spallation Neutron Source, Oak Ridge National Laboratory, One Bethel Valley Road,
Oak Ridge, Tennessee 37831, United States
| | - S. Michael Kilbey
- Center for Nanophase Materials
Sciences, Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996,
United States
| | - Jamie M. Messman
- Center for Nanophase Materials
Sciences, Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
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25
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Arnold RM, Sheppard GR, Locklin J. Comparative Aminolysis Kinetics of Different Active Ester Polymer Brush Platforms in Postpolymerization Modification with Primary and Aromatic Amines. Macromolecules 2012. [DOI: 10.1021/ma3005839] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rachelle M. Arnold
- Department of Chemistry, Faculty
of Engineering, and
the Center for Nanoscale Science and Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Gareth R. Sheppard
- Department of Chemistry, Faculty
of Engineering, and
the Center for Nanoscale Science and Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Jason Locklin
- Department of Chemistry, Faculty
of Engineering, and
the Center for Nanoscale Science and Engineering, University of Georgia, Athens, Georgia 30602, United States
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26
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Arnold RM, Huddleston NE, Locklin J. Utilizing click chemistry to design functional interfaces through post-polymerization modification. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31708g] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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27
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Arumugam S, Orski SV, Locklin J, Popik VV. Photoreactive polymer brushes for high-density patterned surface derivatization using a Diels-Alder photoclick reaction. J Am Chem Soc 2011; 134:179-82. [PMID: 22191601 DOI: 10.1021/ja210350d] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Reactive polymer brushes grown on silicon oxide surfaces were derivatized with photoreactive 3-(hydroxymethyl)naphthalene-2-ol (NQMP) moieties. Upon 300 or 350 nm irradiation, NQMP efficiently produces o-naphthoquinone methide (oNQM), which in turn undergoes very rapid Diels-Alder addition to vinyl ether groups attached to a substrate, resulting in the covalent immobilization of the latter. Any unreacted oNQM groups rapidly add water to regenerate NQMP. High-resolution surface patterning is achieved by irradiating NQMP-derivatized surfaces using photolithographic methods. The Diels-Alder photoclick reaction is orthogonal to azide-alkyne click chemistry, enabling sequential photoclick/azide-click derivatizations to generate complex surface functionalities.
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Affiliation(s)
- Selvanathan Arumugam
- Department of Chemistry and the Center for Nanoscale Science and Engineering, University of Georgia, Athens, Georgia 30602, USA
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