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Kim N, Li X, Kim SH, Kim J. Colloidally stable organic–inorganic hybrid nanoparticles prepared using alkoxysilane-functionalized amphiphilic polymer precursors and mechanical properties of their cured coating film. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.07.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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2
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Radzevicius P, Krivorotova T, Makuska R. Synthesis by one-pot RAFT polymerization and properties of amphiphilic pentablock copolymers with repeating blocks of poly(2-hydroxyethyl methacrylate) and poly(butyl methacrylate). Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.12.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Etampawala TN, Aryal D, Osti NC, He L, Heller WT, Willis CL, Grest GS, Perahia D. Association of a multifunctional ionic block copolymer in a selective solvent. J Chem Phys 2016; 145:184903. [DOI: 10.1063/1.4967291] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - Dipak Aryal
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA
| | - Naresh C. Osti
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA
| | - Lilin He
- Biology and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - William T. Heller
- Biology and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Carl L. Willis
- Kraton Polymers US LLC, 16400 Park Row, Houston, Texas 77084, USA
| | - Gary S. Grest
- Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
| | - Dvora Perahia
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA
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4
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Seppala JE, Lewis RL, Epps TH. Spatial and orientation control of cylindrical nanostructures in ABA triblock copolymer thin films by raster solvent vapor annealing. ACS NANO 2012; 6:9855-9862. [PMID: 23035916 DOI: 10.1021/nn303416p] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present a spatially resolved approach for the solvent vapor annealing (SVA) of block copolymer thin films that permits the facile and relatively rapid manipulation of nanoscale ordering and nanostructure orientation. In our method, a localized (point) SVA zone is created through the use of a vapor delivery nozzle. This point annealing zone can be rastered across the thin film using a motorized stage to control the local nanoscale structure and orientation in a cylinder-forming ABA triblock copolymer thin film. At moderate rastering speeds (∼100 μm/s) (i.e., relatively modest annealing time at a given point), the film displayed ordered cylindrical nanostructures with the cylinders oriented parallel to the substrate surface. As the rastering speed was decreased (∼10 μm/s), the morphology transformed into a surface nanostructure indicative of cylinders oriented perpendicular to the substrate surface. These perpendicular cylinder orientations also were created by rastering multiple times over the same region, and this effect was found when rastering in either retrace (overlapping) or crossed-path (orthogonal) geometries. Similar trends in nanostructure orientation and ordering were obtained from various nozzle diameters by accounting for differences in solvent flux and annealing time, illustrating the universality of this approach. Finally, we note that our "stylus-based" raster solvent vapor annealing technique allows a given point to be solvent annealed approximately 2 orders of magnitude faster than conventional "bell jar" solvent vapor annealing.
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Affiliation(s)
- Jonathan E Seppala
- Department of Chemical & Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
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5
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Yablon DG, Gannepalli A, Proksch R, Killgore J, Hurley DC, Grabowski J, Tsou AH. Quantitative Viscoelastic Mapping of Polyolefin Blends with Contact Resonance Atomic Force Microscopy. Macromolecules 2012. [DOI: 10.1021/ma2028038] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dalia G. Yablon
- Corporate
Strategic Research, ExxonMobil Research and Engineering, Annandale, New
Jersey 08801, United States
| | - Anil Gannepalli
- Asylum Research, Santa Barbara, California
93117, United States
| | - Roger Proksch
- Asylum Research, Santa Barbara, California
93117, United States
| | - Jason Killgore
- Materials
Reliability Division, National Institute of Standards and Technology, Boulder,
Colorado 80305, United States
| | - Donna C. Hurley
- Materials
Reliability Division, National Institute of Standards and Technology, Boulder,
Colorado 80305, United States
| | - Jean Grabowski
- Corporate
Strategic Research, ExxonMobil Research and Engineering, Annandale, New
Jersey 08801, United States
| | - Andy H. Tsou
- Corporate
Strategic Research, ExxonMobil Research and Engineering, Annandale, New
Jersey 08801, United States
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6
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Yang M, Mao J, Nie W, Dong Z, Wang D, Zhao Z, Ji X. Facile synthesis and responsive behavior of PDMS-b
-PEG diblock copolymer brushes via photoinitiated “thiol-ene” click reaction. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.25985] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Grozea CM, Li ITS, Grozea D, Walker GC. Microdomain Orientation of Diblock Copolymer Ultrathin Films Solvent Annealed at Low Temperatures. Macromolecules 2011. [DOI: 10.1021/ma102470v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Claudia M. Grozea
- Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada
| | - Isaac T. S. Li
- Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada
| | - Daniel Grozea
- Department of Materials Science and Engineering, University of Toronto, Toronto M5S 3E4, Canada
| | - Gilbert C. Walker
- Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada
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8
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Wang Y, Tong L, Steinhart M. Swelling-induced morphology reconstruction in block copolymer nanorods: kinetics and impact of surface tension during solvent evaporation. ACS NANO 2011; 5:1928-1938. [PMID: 21323333 DOI: 10.1021/nn1029444] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Nanoscopic domain structures of BCP nanorods can be converted into well-defined mesopore systems by swelling the BCP minority component with a selective solvent at temperatures below the bulk glass transition temperature of the nonswelling matrix. The initial stage of this process involves rapid morphology reconstruction of the nonswelling majority domains to accommodate the increased volume of the swelling minority domains caused by rapid solvent uptake. Morphology reconstruction slows down once entropic restoring forces of the swelling chains impede further uptake of swelling agent. Upon evaporation of the swelling agent, mesopores form in place of the swollen domains as the swollen minority blocks undergo entropic relaxation while intermediate nonequilibrium morphologies in the BCP nanorods are fixated by the reconstructed majority component. The surface area of mesopores developing when swollen cylindrical minority domains collapse may be minimized by the growth of Rayleigh instabilities. Depending on swelling temperature, swelling agent, and BCP architecture, BCP nanorods with one or several cylindrical channels undulated or uniform in diameter running along their long axes, linear strings of spherical cavities, and continuous mesopore systems can be obtained.
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Affiliation(s)
- Yong Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, PR China.
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9
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Kelly JY, Albert JNL, Howarter JA, Kang S, Stafford CM, Epps TH, Fasolka MJ. Investigation of thermally responsive block copolymer thin film morphologies using gradients. ACS APPLIED MATERIALS & INTERFACES 2010; 2:3241-3248. [PMID: 20961126 DOI: 10.1021/am100695m] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report the use of a gradient library approach to characterize the structure and behavior of thin films of a thermally responsive block copolymer (BCP), poly(styrene-b-tert-butyl acrylate) (PS-b-PtBA), which exhibits chemical deprotection and morphological changes above a thermal threshold. Continuous gradients in temperature and film thickness, as well as discrete substrate chemistry conditions, were used to examine trends in deprotection, nanoscale morphology, and chemical structure. Thermal gradient annealing permitted the extraction of transformation rate constants (k(t)) for the completion of thermal deprotection and rearrangement of the film morphology from a single BCP library on hydroxyl and alkyl surfaces, respectively. The transformation rate constants ranged from 1.45 × 10(-4) s(-1) to 5.02 × 10(-5) s(-1) for temperatures between 185 and 140 °C for hydroxyl surfaces. For the same temperature range, the alkyl surfaces yielded k(t) values ranging from 4.76 × 10(-5) s(-1) to 5.73 × 10(-6) s(-1), an order of magnitude slower compared to hydroxyl surfaces. Activation energies of the thermal deprotection and film transformation on these surfaces were also extrapolated from linear fits to Arrhenius behavior. Moreover, we noted a morphology shift and orientation transformation from parallel lamellae to perpendicular cylinders at the free surface because of changes in volume fraction and surface energetics of the initially symmetric BCP. Using gradient techniques, we are able to correlate morphological and chemical structure changes in a rapid fashion, determine kinetics of transitions, and demonstrate the effect of surface chemistry on the deprotection reaction in thermally responsive BCP thin films.
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Affiliation(s)
- Jennifer Y Kelly
- Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
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10
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Park JH, Sun Y, Goldman YE, Composto RJ. Tunable nanoscale channels in diblock copolymer films for biomolecule organization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:10961-10967. [PMID: 20459081 PMCID: PMC2894990 DOI: 10.1021/la100985a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We describe an approach to create nanoscale, functionalized channels in block copolymer films and demonstrate their use as templates for attaching filamentous actin (F-actin). Topographic and chemical patterns on the surface are created and controlled by exposure to UV-ozone (UVO) and reacting with an amine-terminated silane, respectively. Continuous UVO exposure degrades polymer domains by an autocatalytic reaction, and thus, film thickness decreases in a sigmoidal manner. Utilizing the differential etching rates of each domain, nanoscale channels with tunable depth and width are created by varying UVO exposure time and block copolymer molecular weight, respectively. For a perpendicular lamellar morphology poly(styrene-b-methyl methacrylate), P(S-b-MMA), films (65 nm), initially exhibiting higher MMA domains, undergo a height inversion after 3 min of UVO because MMA domains etch twice as fast as S domains. The maximum height difference between domains is approximately 16 nm after approximately 10 min of UVO. Similar behavior is observed for UVO etching of a parallel cylinder morphology. UVO exposure also produces reactive polar groups on the surfaces of poly(styrene) and poly(methyl methacrylate) as well as their corresponding domains in P(S-b-MMA). By exposing UVO-treated films to 3-aminopropyltriethoxysilane (APTES), P(S-b-MMA) surface becomes enriched with amine groups which act as binding sites for biomolecules. Under physiological conditions (pH approximately 7.4), these positively charged nanostructures attract negatively charged F-actin by an electrostatic interaction.
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Affiliation(s)
- Jung Hyun Park
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104
- Nano/Bio Interface Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104
- Department of Biomedical Engineering, Columbia University, New York, New York 10027
| | - Yujie Sun
- Nano/Bio Interface Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104
- Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Yale E. Goldman
- Nano/Bio Interface Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104
- Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Russell J. Composto
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104
- Nano/Bio Interface Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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11
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Chen Z, He C, Li F, Tong L, Liao X, Wang Y. Responsive micellar films of amphiphilic block copolymer micelles: control on micelle opening and closing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:8869-8874. [PMID: 20387851 DOI: 10.1021/la904623e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We reported the deliberate control on the micelle opening and closing of amphiphilic polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) micellar films by exposing them to selective solvents. We first treated the micellar films with polar solvents including ethanol and water (pH = 4, 8, and 12) that have different affinities to P2VP. We observed opening of the micelles in all the cases. Both the size of opened pores and the opening rate are dependent on the solvency of different solvents for P2VP. We then explored the closing behavior of the opened micelles using solvents having different affinities to PS. We found that the opened micelles were recovered to their initial closed micelle forms. The recovery was accompanied by a slow micelle disassociation process which gradually reduced the micelle size. The rates of the micelle closing and disassociation are also dependent on the solvency of different solvents for PS.
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Affiliation(s)
- Zhiquan Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China
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Li Z, Sai H, Warren SC, Kamperman M, Arora H, Gruner SM, Wiesner U. Metal Nanoparticle/Block Copolymer Composite Assembly and Disassembly. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2009; 21:5578-5584. [PMID: 21103025 PMCID: PMC2988680 DOI: 10.1021/cm9020673] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Ligand-stabilized platinum nanoparticles (Pt NPs) were self-assembled with poly(isoprene-block-dimethylaminoethyl methacrylate) (PI-b-PDMAEMA) block copolymers to generate organic-inorganic hybrid materials. High loadings of NPs in hybrids were achieved through usage of N,N-di-(2-(allyloxy)ethyl)-N-3-mercaptopropyl-N-3-methylammonium chloride as the ligand, which provided high solubility of NPs in various solvents as well as high affinity to PDMAEMA. From NP synthesis, existence of sub-1 nm Pt NPs was confirmed by high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) images. Estimations of the Pt NP ligand head group density based on HAADF-STEM images and thermogravimetric analysis (TGA) data yielded results comparable to what has been found for alkanethiol self-assembled monolayers (SAMs) on flat Pt {111} surfaces. Changing the volume fraction of Pt NPs in block copolymer-NP composites yielded hybrids with spherical micellar, wormlike micellar, lamellar and inverse hexagonal morphologies. Disassembly of hybrids with spherical, wormlike micellar, and lamellar morphologies generated isolated metal-NP based nano-spheres, cylinders and sheets, respectively. Results suggest the existence of powerful design criteria for the formation of metal-based nanostructures from designer blocked macromolecules.
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Affiliation(s)
- Zihui Li
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853
| | - Hiroaki Sai
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853
| | - Scott C. Warren
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853
| | - Marleen Kamperman
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853
| | - Hitesh Arora
- Department of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, 14853
| | - Sol M. Gruner
- Department of Physics, Cornell University, Ithaca, NY, 14853
- Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY, 14853
| | - Ulrich Wiesner
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853
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