Self-assembly of a semi-fluorinated diblock copolymer in a selective solvent

Ratnaweera, Dilru; Shrestha, Umesh; Osti, Naresh C.; Kuo, Chung-Mien; Clarson, Stephen J.; Littrell, Kenneth C.; Perahia, Dvora

doi:10.1039/c2sm06117a

Cited by 5 publications

(3 citation statements)

References 35 publications

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“…This plot is useful for studying nanogel degree of globularity, flexibility and compactness. 29,55 The peak appearing in the Kratky plot at higher temperatures suggests the formation of globular particles above 35 1C. As the temperature further increases, the peak becomes more defined suggesting an increase in globularity.…”

Section: Nanogel Cross-linking Via Peptides To Increase Stability Andmentioning

confidence: 99%

Tuneable peptide cross-linked nanogels for enzyme-triggered protein delivery

et al. 2020

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Section: Nanogel Cross-linking Via Peptides To Increase Stability Andmentioning

confidence: 99%

Tuneable peptide cross-linked nanogels for enzyme-triggered protein delivery

et al. 2020

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“…This is consistent with the traditional amphiphilic block copolymer micelles where N agg decreases with increasing temperature for the UCST system. 60,66,67 Based on the structural parameters, the interfacial area per chain as a function of c salt is estimated by 4π(R core ) 2 /N agg , as displayed in Figure 7a. Since the interfacial area per chain represents a measure of unfavorable interaction between coacervates and aqueous media, the reduced interfacial tension of the coacervates at higher c salt is confirmed by the larger interfacial area per chain.…”

Section: Dlsmentioning

confidence: 99%

Ionic Strength-Dependent Structure of Complex Coacervate Core Micelles

Heo,

Choi

2024

J. Phys. Chem. B

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Salt concentration-dependent structure of complex coacervate core micelles (C3Ms), formed by polyether-based block copolyelectrolytes containing cationic ammonium (A) or anionic sulfonate (S) groups in aqueous media, is investigated by light scattering and small-angle X-ray/neutron scattering (SAX/NS). As the salt concentration increases, both a core radius (R core ) and an aggregation number (N agg ) significantly decrease, but a corona thickness (L corona ) is nearly unchanged. Larger salt concentrations can lower the interfacial tension between the coacervate cores and aqueous media, resulting in an increased interfacial area per chain and a more relaxed conformation of the core blocks. Based on the structure characterization, the scaling relationship between structure parameters (i.e., R core , N agg , and L corona ) and salt concentration is obtained and compared to the theoretical description estimated by the free energy balance between the entropic penalty of core stretching and the interfacial energy. We propose that the free energy contribution of the core block stretching is not negligible in C3Ms because of the highly swollen cores caused by water.

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“…In 2012, Perahia et al 189 reported the self-assembly of a poly(semi-fluorinated siloxane)-containing diblock copolymer, poly(trifluoro propyl methylsiloxane)-b-polystyrene (PSiF-b-PS) in toluene (a selective solvent for PS). The high incompatibility of the PSiF block drove the aggregation.…”

Section: Fluorinated Siloxanementioning

confidence: 99%