1
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Moinuddin M, Rane K. Effect of shape anisotropy on the precipitation of dimeric nanoparticles. SOFT MATTER 2023; 19:8604-8616. [PMID: 37909104 DOI: 10.1039/d3sm00827d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
We use grand canonical transition matrix Monte Carlo simulations to study the precipitation of dimeric nanoparticles. The dimers are composed of two particles having different chemical features and separated by a fixed distance. The non-attractive and attractive parts of the dimer are modeled using hard-sphere and square-well potentials, respectively. The shape anisotropy is altered by changing the relative sizes of the two particles. We observe that the stability of the nanosuspension increases with the increase in the size of the non-attractive part of the dimer. The precipitates of dimers having larger non-attractive parts have lower packing densities, contain large cavities, and show evidence of self-assembly in the bulk and on the surface. We also use the results from our simulations and the classical nucleation theory to study the kinetics of precipitation. At a given temperature and relative supersaturation, the rate of homogeneous nucleation increases with the increase in the size of the non-attractive parts. Finally, we use an example to show how our results can guide the design of nanosuspensions containing chemically anisotropic dimers that are stable under particular conditions.
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Affiliation(s)
- Md Moinuddin
- Discipline of Chemical Engineering, Indian Institute of Technology Gandhinagar, Gujarat, 382355, India.
| | - Kaustubh Rane
- Discipline of Chemical Engineering, Indian Institute of Technology Gandhinagar, Gujarat, 382355, India.
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2
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Moinuddin M, Tripathy M. Effect of Architecture and Topology on the Self-Assembly of Polymer-Grafted Nanoparticles. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Md Moinuddin
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai400076, Maharashtra, India
| | - Mukta Tripathy
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai400076, Maharashtra, India
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3
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Huo H, Tan T, Gou L, Chen L, Zhang L, Zhang Q, Liu F. Single-chain tethered nanoparticles with tunable softness: scalable synthesis and unique self-assembly behavior. Polym Chem 2019. [DOI: 10.1039/c9py00849g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A scalable method to prepare single-chain tethered nanoparticles with tunable softness, which results in unique self-assembly behaviors.
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Affiliation(s)
- Haohui Huo
- State Key Laboratory for Mechanical Behaviour of Materials
- Shaanxi International Research Center for Soft Matter
- Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
| | - Tianyi Tan
- State Key Laboratory for Mechanical Behaviour of Materials
- Shaanxi International Research Center for Soft Matter
- Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
| | - Lu Gou
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- School of Science
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Long Chen
- State Key Laboratory for Mechanical Behaviour of Materials
- Shaanxi International Research Center for Soft Matter
- Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
| | - Lei Zhang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- School of Science
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Qilu Zhang
- State Key Laboratory for Mechanical Behaviour of Materials
- Shaanxi International Research Center for Soft Matter
- Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
| | - Feng Liu
- State Key Laboratory for Mechanical Behaviour of Materials
- Shaanxi International Research Center for Soft Matter
- Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
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4
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Balch AL, Winkler K. Two-Component Polymeric Materials of Fullerenes and the Transition Metal Complexes: A Bridge between Metal–Organic Frameworks and Conducting Polymers. Chem Rev 2016; 116:3812-82. [DOI: 10.1021/acs.chemrev.5b00553] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Alan L. Balch
- Department
of Chemistry, University of California, Davis, California 95616, United States
| | - Krzysztof Winkler
- Institute
of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok, Poland
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5
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Haley JD, Iacovella CR, Cummings PT, McCabe C. Examining the aggregation behavior of polymer grafted nanoparticles using molecular simulation and theory. J Chem Phys 2015; 143:054904. [DOI: 10.1063/1.4927819] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Jessica D. Haley
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA
- Multiscale Modeling and Simulation (MuMS) Center, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Christopher R. Iacovella
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA
- Multiscale Modeling and Simulation (MuMS) Center, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Peter T. Cummings
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA
- Multiscale Modeling and Simulation (MuMS) Center, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Clare McCabe
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA
- Multiscale Modeling and Simulation (MuMS) Center, Vanderbilt University, Nashville, Tennessee 37235, USA
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
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6
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Kumar SK, Jouault N, Benicewicz B, Neely T. Nanocomposites with Polymer Grafted Nanoparticles. Macromolecules 2013. [DOI: 10.1021/ma4001385] [Citation(s) in RCA: 594] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sanat K. Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United
States
| | - Nicolas Jouault
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United
States
| | - Brian Benicewicz
- Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Tony Neely
- Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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7
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Lebedev VT, Kul’velis YV, Orlova DN, Melenevskaya EY, Nasonova KV, Vinogradova LV. Structure formation of fullerene-containing propylene oxide oligomers in deuterium water. RUSS J APPL CHEM+ 2013. [DOI: 10.1134/s1070427213040204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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9
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10
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Abstract
It is well recognized that nanocomposites formed by adding nanoparticles to polymers can have significantly enhanced properties relative to the native polymer. This review focuses on three aspects that are central to the outstanding problem of realizing these promised property improvements. First, we ask if there exist general strategies to control nanoparticle spatial distribution. This is an important question because it is commonly accepted that the nanoparticle dispersion state crucially affects property improvements. Because ideas on macroscale composites suggest that optimizing different properties requires different dispersion states, we next ask if we can predict a priori the particle dispersion and organization state that can optimize one (or more) properties of the resulting nanocomposite. Finally, we examine the role that particle shape plays in affecting dispersion and hence property control. This review focuses on recent advances concerning these underpinning points and how they affect measurable properties relevant to engineering applications.
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Affiliation(s)
- Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
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11
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12
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Yao Z, Tam KC. Stimuli-Responsive Water-Soluble Fullerene (C60) Polymeric Systems. Macromol Rapid Commun 2011; 32:1863-85. [DOI: 10.1002/marc.201100426] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 07/25/2011] [Indexed: 11/10/2022]
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13
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Self-assembly of thermo-responsive poly(oligo(ethylene glycol) methyl ether methacrylate)-C60 in water-methanol mixtures. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.06.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Delivery of fullerene-containing complexes via microgel swelling and shear-induced release. Int J Pharm 2010; 384:9-14. [DOI: 10.1016/j.ijpharm.2009.09.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 09/09/2009] [Accepted: 09/11/2009] [Indexed: 11/21/2022]
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16
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Cho SH, Lee DI, Jung JH, Kim TW. Electrical bistabilities and memory stabilities of nonvolatile bistable devices fabricated utilizing C(60) molecules embedded in a polymethyl methacrylate layer. NANOTECHNOLOGY 2009; 20:345204. [PMID: 19652271 DOI: 10.1088/0957-4484/20/34/345204] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Current-voltage (I-V) measurements on Al/fullerene (C(60)) molecules embedded in polymethyl methacrylate/Al devices at 300 K showed a current bistability due to the existence of the C(60) molecules. The on/off ratio of the current bistability for the memory devices was as large as 10(3). The retention time of the devices was above 2.5 x 10(4) s at room temperature, and cycling endurance tests on these devices indicated that the ON and OFF currents showed no degradation until 50,000 cycles. Carrier transport mechanisms for the nonvolatile bistable devices are described on the basis of the I-V experimental and fitting results.
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Affiliation(s)
- Sung Hwan Cho
- National Research Laboratory for Nano Quantum Electronics, Division of Electronics and Computer Engineering, Hanyang University, Seoul, Korea
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17
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Jayaraman A, Schweizer KS. Liquid state theory of the structure and phase behaviour of polymer-tethered nanoparticles in dense suspensions, melts and nanocomposites. MOLECULAR SIMULATION 2009. [DOI: 10.1080/08927020902744680] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Mugisawa M, Kasai R, Sawada H. Cross-linked fluoroalkyl end-capped co-oligomeric nanoparticle-encapsulated fullerenea new approach to the surface modification of traditional organic polymers with fullerene-containing nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:415-421. [PMID: 19032021 DOI: 10.1021/la800875s] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Cross-linked fluoroalkyl end-capped co-oligomeric nanoparticle-encapsulated fullerenes, prepared by deprotecting a fluoroalkyl end-capped isocyanatoethyl methacrylate 2-butanone oxime adduct-1-hydroxy-5-adamantylacrylate co-oligomer in the presence of fullerene, were of well-defined size in the nanometer range (28-82 nm) and exhibited good dispersibility in a variety of solvents such as methanol, ethanol, isopropyl alcohol, tetrahydrofuran, N,N-dimethylformamide, dimethyl sulfoxide, and 1,2-dichloroethane. Transmission electron microscopy images also showed that these nanocomposites were particles with a mean diameter of 45 nm and that the fullerenes were tightly encapsulated into fluorinated nanoparticle cores. In methanol, these fluorinated nanoparticles emitted fluorescence related to the presence of fullerene and were applied in the surface modification of traditional organic polymers such as poly(methyl methacrylate) (PMMA) to effect good oleophobicity imparted by fluorine on the modified film surfaces. Interestingly, a higher fluorescent intensity of fullerene was observed on the modified PMMA surfaces, although the reverse side of these film surfaces yielded an extremely weak fluorescent intensity. More interestingly, a fluorescence microscopy image of the cross-section of the modified PMMA film showed that encapsulated fullerene was arranged regularly above the modified PMMA film surface.
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Affiliation(s)
- Masaki Mugisawa
- Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
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19
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Jayaraman A, Schweizer KS. Effective Interactions, Structure, and Phase Behavior of Lightly Tethered Nanoparticles in Polymer Melts. Macromolecules 2008. [DOI: 10.1021/ma801722m] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arthi Jayaraman
- Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois, 1304 West Green Street, Urbana, Illinois 61801
| | - Kenneth S. Schweizer
- Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois, 1304 West Green Street, Urbana, Illinois 61801
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20
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Jayaraman A, Schweizer KS. Effect of the number and placement of polymer tethers on the structure of concentrated solutions and melts of hybrid nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:11119-11130. [PMID: 18729491 DOI: 10.1021/la801432b] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We have generalized and applied the microscopic polymer reference interaction site model theory to study intermolecular pair correlation functions and collective structure factors of concentrated solutions and melts of spherical nanoparticles carrying one, two, or four tethered polymer chains. A complex interplay of entropy (translational, conformational, and packing) and enthalpy (particle-particle attraction) leads to different structural arrangements with distinctive small- and wide-angle scattering signatures. Strong concentration fluctuations indicative of aggregate formation and/or a tendency for microphase separation occur as the total packing fraction and/or particle-particle attraction strength increase. In analogy with block copolymers, the microphase spinodal curve is estimated by extrapolation of the inverse of the amplitude of the small-angle scattering peak. As the number of tethered chains on nanoparticles increases, the microphase separation boundary spinodal occurs at higher particle-particle attraction strength or lower temperature. For nanoparticles with two tethers, increasing the angle between the attached chains shifts the microphase spinodal to lower temperatures. For nanoparticles with four tethers, the structural correlations are insensitive to various symmetric placements. The tendency for microphase transition is enhanced upon asymmetrically placing all four tethers on one side of the particle due to the high anisotropy of steric hindrance.
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Affiliation(s)
- Arthi Jayaraman
- Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, USA
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21
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Heo GS, Moon B. Anhydride-functionalized fullerene: a versatile precursor for fullerene-based materials. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.07.064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Kai W, Hua L, Dong T, Pan P, Zhu B, Inoue Y. Polyhedral Oligomeric Silsesquioxane- and Fullerene-End-Capped Poly(ε
-caprolactone). MACROMOL CHEM PHYS 2008. [DOI: 10.1002/macp.200800020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Singh R, Goswami T. Synthesis and evaluation of thermal, photophysical and magnetic properties of novel starlike fullerene–organosilane macromolecules. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.03.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Jayaraman A, Schweizer KS. Structure and assembly of dense solutions and melts of single tethered nanoparticles. J Chem Phys 2008; 128:164904. [DOI: 10.1063/1.2907717] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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25
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Wang X, Zhang Y, Zhu Z, Liu S. Fabrication of Fullerene-Containing Hybrid Vesicles via Supramolecular Self-Assembly of a Well-Defined Amphiphilic Block Copolymer Incorporated with a Single C60 Moiety at the Diblock Junction Point. Macromol Rapid Commun 2008. [DOI: 10.1002/marc.200700811] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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26
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Kai W, Hua L, Dong T, Pan P, Zhu B, Inoue Y. Fullerene End-Capped Biodegradable Poly(ɛ-caprolactone). MACROMOL CHEM PHYS 2008. [DOI: 10.1002/macp.200700375] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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Wang C, Ravi P, Tam KC. Supramolecular complex of [60]fullerene-grafted polyelectrolyte and surfactant: mechanism and nanostructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:8798-805. [PMID: 17658759 DOI: 10.1021/la700600r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Water-soluble, pH-responsive mono- and di-[60]fullerene end-capped poly(acrylic acid)s (PAA-C60 and C60-PAA-C60) were synthesized using the atom transfer radical polymerization technique. Isothermal titration calorimetry, dynamic light scattering, UV-vis spectroscopy, and transmission electron microscopy were employed to study the supramolecular complexation between fullerene end-capped PAAs and nonionic surfactant, polyethylene glycol (9-10) tert-octylphenyl ether, also known as Triton X100 (TX100) at different pH values. At pH < 4, TX100 bound specifically to C60 domains driven by hydrophobic and pi-pi interactions between TX100 and fullerene molecules. The binding was exothermic, and the magnitude of the interaction decreased gradually with increasing pH. The amount of polymer-bound TX100 was proportional to the fullerene content, which was approximately 1.3 and approximately 2.5 mM for 5 mM (concentration of carboxylic groups) PAA-C60 and C60-PAA-C60, respectively. Morphological transformations resulting in the formation of polymer/surfactant complex (PSC) precipitates in the course of binding were observed for both polymers. The PSC of PAA-C60 possessed a dense spherical structure, whereas the PSC of C60-PAA-C60 possessed a lamellar stacking structure. The PSC precipitates resolubilized in excess amounts of TX100 to form stable aggregates.
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Affiliation(s)
- Chang Wang
- Singapore-MIT Alliance, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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28
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Affiliation(s)
- Francesco Giacalone
- Dipartimento di Chimica Organica "E. Paterno", Università degli Studi di Palermo, Parco d'Orleans II, I-90128 Palermo, Italy.
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29
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Kai W, Hua L, Dong T, Pan P, Zhu B, Inoue Y. Synthesis and characterization of fullerene grafted poly(ɛ-caprolactone). J Appl Polym Sci 2007. [DOI: 10.1002/app.27621] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Murakami H, Nakanishi T, Morita M, Taniguchi N, Nakashima N. Self-Assembled Aggregates and Molecular Bilayer Films of a Double-Chain Fullerene Lipid: Structure and Electrochemistry. Chem Asian J 2006; 1:860-7. [PMID: 17441129 DOI: 10.1002/asia.200600229] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The self-aggregation behavior of C60 fullerenes that bear two octadecyl chains (lipid 1) as well as the structures and electrochemical properties of cast films of 1 are described. We also examined the self-aggregation behavior in organic solvents of three previously reported compounds: C60 with three each of hexadecyl (lipid 2), tetradecyl (lipid 3), or dodecyl (lipid 4) chains. The fullerene lipids in alcohols spontaneously formed spherical aggregates, whose diameters are related to the alkyl-chain lengths, concentrations of the fullerene lipids, and the solvent polarity. The morphologies of the aggregates showed temperature dependence. Cast films of 1 formed multimolecular bilayer structures that undergo a phase transition typical of lipid bilayer membranes. The electrochemistry of cast films of 1 on an electrode in aqueous medium exhibits temperature dependence.
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Affiliation(s)
- Hiroto Murakami
- Department of Science and Technology, Graduate School of Materials Science, Nagasaki University, Nagasaki 852-8521, Japan
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31
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A Convenient Method for Preparation of Amphiphilic Monomethoxypoly (Ethylene Glycol)–Polystyrene Diblock Copolymer by NMRP Technique. JOURNAL OF POLYMER RESEARCH 2006. [DOI: 10.1007/s10965-006-9079-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Wang M, Pramoda KP, Goh SH. Reinforcing and Toughening of Poly(vinyl chloride) with Double-C60-End-Capped Poly(n-butyl methacrylate). Macromolecules 2006. [DOI: 10.1021/ma0604901] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mian Wang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, and Institute of Materials Research and Engineering, National University of Singapore, 3 Research Link, Singapore 117602
| | - K. P. Pramoda
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, and Institute of Materials Research and Engineering, National University of Singapore, 3 Research Link, Singapore 117602
| | - S. H. Goh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, and Institute of Materials Research and Engineering, National University of Singapore, 3 Research Link, Singapore 117602
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34
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Kai W, Zhao L, Zhu B, Inoue Y. Mechanical Properties of Blends of Double-Fullerene End-Capped Poly(ethylene oxide) and Poly(L-lactic acid). MACROMOL CHEM PHYS 2006. [DOI: 10.1002/macp.200600027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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35
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Wang C, Ravi P, Tam KC. Morphological transformation of [60]fullerene-containing poly(acrylic acid) induced by the binding of surfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:2927-30. [PMID: 16548533 DOI: 10.1021/la052191v] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Water-soluble pH-responsive [60]fullerene end-capped poly(acrylic acid) (PAA85-b-C60) was synthesized using atom-transfer radical polymerization (ATRP) technique. The unusual morphological transformation of the polymer induced by the binding of nonionic surfactant Triton X-100 (TX100) at different degrees of neutralization (alpha) was investigated using isothermal titration calorimetry (ITC), UV-vis spectroscopy, dynamic light scattering (DLS), and transmission electron microscopy (TEM). For the 5 mM (monomer concentration) polymer solution at pH < 4, approximately 1.3 mM TX100 binds specifically to C60 domains of the polymeric micelles driven by hydrophobic interaction, which induces a structural transformation of the polymer from a large compound micelle with a radius of 110 nm to a dense precipitated spherical polymer/surfactant complex (PSC) with a radius of 500 nm. The precipitates are resolubilized by a wetting layer of TX100 in excess surfactant (> 1.7 mM in the polymer solution). The binding is significantly weakened and the complexation is disrupted with increasing pH, where the interaction completely ceased at pH > 6.
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Affiliation(s)
- Chang Wang
- Singapore-MIT Alliance, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore
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36
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37
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Kai W, Zhao L, Zhu B, Inoue Y. Enforcing Effect of Double-Fullerene End-Capped Poly(ethylene oxide) on Mechanical Properties of Poly(L-lactic acid). Macromol Rapid Commun 2006. [DOI: 10.1002/marc.200500696] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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38
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Glotzer SC, Horsch MA, Iacovella CR, Zhang Z, Chan ER, Zhang X. Self-assembly of anisotropic tethered nanoparticle shape amphiphiles. Curr Opin Colloid Interface Sci 2005. [DOI: 10.1016/j.cocis.2005.09.011] [Citation(s) in RCA: 155] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Ying Q, Zhang J, Liang D, Nakanishi W, Isobe H, Nakamura E, Chu B. Fractal behavior of functionalized fullerene aggregates. I. Aggregation of two-handed tetraaminofullerene with DNA. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:9824-31. [PMID: 16229498 DOI: 10.1021/la050557y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
In tris-buffered saline (TBS) with a trace of dimethylformamide (DMF), the homoaggregation process of a functionalized fullerene, the two-handed tetraaminofullerene (TH), and the heteroaggregation process (complex formation) of TH with DNA (pGL3-control plasmid) were studied dynamically by using a combination of static and dynamic laser light scattering measurements. Fractal behavior was investigated in the aggregation process of both TH homoaggregates and TH-DNA heteroaggregates. The stability of aggregates in solution depends on the molar concentration ratio R(M), defined as the molar ratio of moles of TH to moles of the DNA base pair. Higher R(M) values resulted in lower aggregate stability. The transition of the fractal dimension (Df) in TH homoaggregation by rapidly mixing 3.78 microM TH with an equal volume of the blank buffer was found to vary from a value of 1.46 to 2.02. Dynamic light scattering results revealed that, in the aggregation process, the change in the size distribution of aggregates with time could be related to a Df transition. In the Df transition region, the size distribution of homoaggregates displayed a drastic change from a single-mode distribution to a bimodal distribution, which clearly suggested a restructuring process with the formation of large aggregates. When the aggregation process finally reached equilibrium, Df = 2.02, the size of the homoaggregates had a single mode but a broad distribution. However, TH-DNA heteroaggregation showed a Df transition from 1.58 to 1.7, but over a shorter time range of less than 5 min. Then, the Df value fluctuated in the range of 1.7 and finally reached an equilibrium value of Df approximately 1.78, which was independent of molar concentration. There are two main action forces involved in the heteroaggregation process: van der Waals forces and attractive electrostatic forces, with the latter one being stronger and faster than that of the former. Therefore, a two-step action could occur in the heteroaggregation process. In the beginning of mixing, the attractive electrostatic forces dictated the aggregation process, and then van der Waals forces also got involved in the entire aggregation process. By using an initial concentration of 3.78 microM each and R(M) = 1, TH-DNA heteroaggregates showed more stable solution behavior than the homoaggregates. The lower Df value of the heteroaggregates could be related to a looser compact structure. Results from scanning electron microscopy (SEM) also disclosed the different textures between TH homoaggregates and TH-DNA heteroaggregates; the former had a more dense packing than the latter one.
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Affiliation(s)
- Qicong Ying
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA
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Yu H, Gan LH, Hu X, Venkatraman SS, Tam KC, Gan YY. A Novel Amphiphilic Double-[60]Fullerene-Capped Triblock Copolymer. Macromolecules 2005. [DOI: 10.1021/ma051833i] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Yu
- Natural Sciences & Science Education, National Institute of Education, School of Materials Engineering, and School of Mechanical & Aerospace Engineering, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Republic of Singapore
| | - L. H. Gan
- Natural Sciences & Science Education, National Institute of Education, School of Materials Engineering, and School of Mechanical & Aerospace Engineering, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Republic of Singapore
| | - X. Hu
- Natural Sciences & Science Education, National Institute of Education, School of Materials Engineering, and School of Mechanical & Aerospace Engineering, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Republic of Singapore
| | - S. S. Venkatraman
- Natural Sciences & Science Education, National Institute of Education, School of Materials Engineering, and School of Mechanical & Aerospace Engineering, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Republic of Singapore
| | - K. C. Tam
- Natural Sciences & Science Education, National Institute of Education, School of Materials Engineering, and School of Mechanical & Aerospace Engineering, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Republic of Singapore
| | - Y. Y. Gan
- Natural Sciences & Science Education, National Institute of Education, School of Materials Engineering, and School of Mechanical & Aerospace Engineering, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Republic of Singapore
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41
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Ravi P, Dai S, Meng Hong K, Tam KC, Gan LH. Self-assembly of C60 containing poly(methyl methacrylate) in ethyl acetate/decalin mixtures solvent. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.03.061] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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42
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Mya KY, Li X, Chen L, Ni X, Li J, He C. Core−Corona Structure of Cubic Silsesquioxane-Poly(Ethylene Oxide) in Aqueous Solution: Fluorescence, Light Scattering, and TEM Studies. J Phys Chem B 2005; 109:9455-62. [PMID: 16852135 DOI: 10.1021/jp050287s] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Well-defined amphiphilic cubic silsesquioxane-poly(ethylene oxide) (CSSQ-PEO) was prepared from octakis (dimethylsiloxy)octasilsesquioxane (Q8M8(H)) and allyl-PEO through a hydrosilylation reaction. The structure of CSSQ-PEO was characterized by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC). The amphiphilic properties and aggregation process of CSSQ-PEO in aqueous solution were investigated by fluorescence, dynamic and static light scattering (DLS and SLS), and transmission electron microscopy (TEM). The critical aggregation concentration (CAC) determined by fluorescence measurements was found to be 0.28 mg/mL. Combinations of DLS, SLS, and TEM studies showed the existence of core-corona micelle with hydrophobic CSSQ as the core and hydrophilic PEO as the corona in aqueous solution. The observation of two size distribution peaks from DLS measurements revealed the coexistence of small amounts of unassociated unimolecular micelles (approximately 10% of the scattered intensity) together with micellar aggregates when the CSSQ-PEO concentration was < or = 2 mg/mL. The hydrodynamic radii (R(h)) of unassociated unimolecular micelle and micellar aggregates were found to be 26 and 79 nm, respectively. A large R(g)/R(h) ratio (1.46) and the extremely small value of average chain density (4 x 10(-4) g/cm3) indicate the small hydrophobic CSSQ core was surrounded by the extended PEO coronae. The aggregation number (N(agg)) of CSSQ-PEO in aqueous solution was found to be 38 +/- 2 from SLS and 31-40 from TEM, respectively. The long PEO segments act as a spacer between the spherical aggregates, which facilitate the formation of a network-like structure at high concentration.
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Affiliation(s)
- K Yi Mya
- Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602, Republic of Singapore
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43
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Teoh SK, Ravi P, Dai S, Tam KC. Self-Assembly of Stimuli-Responsive Water-Soluble [60]Fullerene End-Capped Ampholytic Block Copolymer. J Phys Chem B 2005; 109:4431-8. [PMID: 16851514 DOI: 10.1021/jp045413r] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A well-defined, water-soluble, pH and temperature stimuli-responsive [60]fullerene (C(60)) containing ampholytic block copolymer of poly((methacrylic acid)-block-(2-(dimethylamino)ethyl methacrylate))-block-C(60) (P(MAA-b-DMAEMA)-b-C(60)) was synthesized by the atom transfer radical polymerization (ATRP) technique. The self-assembly behavior of the C(60) containing polyampholyte in aqueous solution was characterized by potentiometric and conductometric titration, dynamic light scattering (DLS), and transmission electron microscopy. This amphiphilic mono-C(60) end-capped block copolymer shows enhanced solubility in aqueous medium at room and elevated temperatures and at low and high pH but phase separates at intermediate pH between 5.4 and 8.8. The self-assembly of the copolymer is different from that of P(MAA-b-DMAEMA). Examination of the association behavior using DLS revealed the coexistence of unimers and aggregates at low pH at all temperatures studied, with the association being driven by the balance of hydrophobic and electrostatic interactions. Unimers and aggregates of different microstructures are also observed at high pH and at temperatures below the lower critical solution temperature (LCST) of PDMAEMA. At high pH and at temperatures above the LCST of PDMAEMA, the formation of micelles and aggregates coexisting in solution is driven by the combination of hydrophobic, electrostatic, and charge-transfer interactions.
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Affiliation(s)
- Soon Kay Teoh
- School of Mechanical and Aerospace Engineering and Division of Chemical and Biomolecular Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore
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Ravi P, Dai S, Tan CH, Tam KC. Self-Assembly of Alkali-Soluble [60]Fullerene Containing Poly(methacrylic acid) in Aqueous Solution. Macromolecules 2005. [DOI: 10.1021/ma0480547] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Palaniswamy Ravi
- Singapore-MIT Alliance, School of Mechanical and Production Engineering, Division of Chemical & Biomolecular Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore
| | - Sheng Dai
- Singapore-MIT Alliance, School of Mechanical and Production Engineering, Division of Chemical & Biomolecular Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore
| | - Chung How Tan
- Singapore-MIT Alliance, School of Mechanical and Production Engineering, Division of Chemical & Biomolecular Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore
| | - Kam Chiu Tam
- Singapore-MIT Alliance, School of Mechanical and Production Engineering, Division of Chemical & Biomolecular Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore
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45
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Tan CH, Ravi P, Dai S, Tam KC, Gan LH. Solvent-induced large compound vesicle of [60]fullerene containing poly(tert-butyl methacrylate). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:9882-9884. [PMID: 15491229 DOI: 10.1021/la049747j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- Chung How Tan
- School of Mechanical and Production Engineering, Singapore-MIT Alliance, and Natural Sciences, National Institute of Education, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Republic of Singapore
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46
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Affiliation(s)
- Sharon C Glotzer
- Department of Chemical Engineering and the Department of Materials Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109-2136, USA.
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47
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Dai S, Ravi P, Tan CH, Tam KC. Self-assembly behavior of a stimuli-responsive water-soluble [60]fullerene-containing polymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:8569-8575. [PMID: 15379476 DOI: 10.1021/la048826s] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A novel pH- and temperature-responsive water-soluble [60]fullerene-containing poly[2-(dimethylamino)ethyl methacrylate] (C60-b-PDMAEMA) was synthesized by atom transfer radical polymerization. The pH and temperature dependence of the physical properties of the aqueous C60-b-PDMAEMA solution was studied by potentiometric and conductometric titrations, UV-vis transmittance, and laser light scattering techniques. At low pH and at temperatures ranging from 25 to 55 degrees C, in addition to C60-b-PDMAEMA unimers, micelle-like aggregates are produced in the aqueous solution containing C60 hydrophobic cores and protonated PDMAEMA shells. Only unimeric C60-b-PDMAEMAs are found to exist in solution at high pH and low temperature, where PDMAEMA segments form a charge-transfer complex with C60 molecules. However, C60-b-PDMAEMA precipitates from aqueous solution at temperatures exceeding the lower critical solution temperature of PDMAEMA of approximately 45 degrees C. The pH and temperature stimuli-responsive properties of the [60]fullerene-containing polymer in aqueous solution are completely reversible.
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Affiliation(s)
- S Dai
- Singapore-MIT Alliance, Nanyang Technological University, 50 Nanyang Avenue, 639798, Republic of Singapore
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48
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Goh HW, Goh SH, Xu GQ, Lee KY, Yang GY, Lee YW, Zhang WD. Optical Limiting Properties of Double-C60-End-Capped Poly(ethylene oxide), Double-C60-End-Capped Poly(ethylene oxide)/Poly(ethylene oxide) Blend, and Double-C60-End-Capped Poly(ethylene oxide)/Multiwalled Carbon Nanotube Composite. J Phys Chem B 2003. [DOI: 10.1021/jp027726x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. W. Goh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore, DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore, and Institute of Material Research and Engineering, National University of Singapore, Research Link, Singapore 117602, Singapore
| | - S. H. Goh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore, DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore, and Institute of Material Research and Engineering, National University of Singapore, Research Link, Singapore 117602, Singapore
| | - G. Q. Xu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore, DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore, and Institute of Material Research and Engineering, National University of Singapore, Research Link, Singapore 117602, Singapore
| | - K. Y. Lee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore, DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore, and Institute of Material Research and Engineering, National University of Singapore, Research Link, Singapore 117602, Singapore
| | - G. Y. Yang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore, DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore, and Institute of Material Research and Engineering, National University of Singapore, Research Link, Singapore 117602, Singapore
| | - Y. W. Lee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore, DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore, and Institute of Material Research and Engineering, National University of Singapore, Research Link, Singapore 117602, Singapore
| | - W.-D. Zhang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore, DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore, and Institute of Material Research and Engineering, National University of Singapore, Research Link, Singapore 117602, Singapore
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