Self-assembled block copolymers: Bulk to thin film

Kim, Jin Kon; Lee, Jeong In; Lee, Dong Hoon

doi:10.1007/bf03218519

Cited by 109 publications

(102 citation statements)

References 440 publications

(369 reference statements)

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“…The developed model is ideal to study this type of percolation and transport. In addition, block copolymers naturally phase segregate into typically conductive and structural elements, where percolation is critical [67], and form various representative elements that can be of various dimensionality from 3-D gyroids to 2-D lamellae to 1-D cylinders [68][69][70][71][72]. Similar to the random copolymers, defects in blockcopolymer structures can also cause a change of conductivity within the representative element.…”

Section: Dual-phase Conducting Networkmentioning

confidence: 99%

Resistor-Network Modeling of Ionic Conduction in Polymer Electrolytes

Gostick

Weber

2015

Electrochimica Acta

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A resistor- and pore-network methodology is used to examine transport of ions in various ion-conducting polymers. The model is used to examine ion conduction in random and correlated (at the mesoscale) distributions of high and low conductive domains showing the impact that defects or different conduction modes have on overall effective conductivity and percolation. The specific case of Nafion is modeled where swelling is accounted for as well as a spatially varying conductivity within the nanodomains. The model is also used to investigate conduction in thin-films, where a substantial drop in conductivity is witnessed for films less than 50 nm thick. The model shows good agreement with experimental data and provides a methodology for efficient multiscale modeling of transport in ion-conducting polymers from the nanoscale morphology through the mesoscale transport pathways to the observable macroscale properties

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Section: Dual-phase Conducting Networkmentioning

confidence: 99%

Resistor-Network Modeling of Ionic Conduction in Polymer Electrolytes

Gostick

Weber

2015

Electrochimica Acta

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“…13 Among them, biodegradable polymer was one of the most widely used materials in the stent surface modification. [14][15][16] In this study, the thermal stabilities and film surface properties of both materials (PLAL and PLA) have been investigated by DSC, TGA, contact angle and SEM. The behaviors of cells adhesion and spreaded morphologies on the PLAL surface were observed by SEM and optical microscopy.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of poly(L,L-lactic acid-co-lysine) and its cell compatibility evaluation as coating material on metal

et al. 2010

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This study evaluated and compared the cell adhesion and spreading behavior on the surfaces of biodegradable poly(L,L-lactic acid) (PLA) and poly(L,L-lactic acid-co-lysine) (PLAL) films. The thermal stability and film surface properties were examined by differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), contact angle, and scanning electron microscopy (SEM) to assess the physicochemical characteristics affecting the cell adhesion behavior of materials, PLA and PLAL. Mouse fibroblast cells were cultured on the surface of stainless steel wafers coated with PLA and PLAL. SEM images showed most of the cells spreading slightly on the PLA coating film with a linkage of cellular pseudopods. The degree of cell spreading on the PLAL surface would be higher than that of PLA due to the side-chain effect of (+) charged amino groups easily inducing cell adhesion and spreading. Moreover, the cell viability was also evaluated on PLA and PLAL using a MTT assay, and no acute cytotoxicity was observed.

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“…Because the block copolymer chemistry such as the architecture, chain length, and composition can be varied substantially, it should be possible to fine-tune the properties of the composite. 13 Moreover, the length scale of microstructures in block copolymers is on the order of the characteristic length scale of the chains, ranging from 5 to 100 nm, which may make mesoporous materials with large pore sizes accessible. 11 For example, styrene-based water-soluble diblock ionomers were used to synthesize semiconductor nanoparticles such as PbS and CdS by Adi Eisenberg et al.…”

Section: Introductionmentioning

confidence: 99%

Selective embedding of P2VP coated Pd nanoparticles in PS-b-P2VP block copolymers

2010

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Nanocomposite films with palladium nanoparticles were prepared in a block copolymer with different morphologies. Poly(2-vinylpyridine) (P2VP) and polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) block copolymers were synthesized by living anionic polymerization using a vacuum apparatus system. To fabricate the nanocomposites, palladium nanoparticles with P2VP chains on their surfaces, which were prepared by alcohol reduction (Pd-P2VP) were introduced to the block copolymers. These palladium nanoparticles (4 nm) were embedded selectively in the P2VP domain of PS-b-P2VP. Various nanocomposites with different morphologies were obtained as the volume ratio of the block copolymer and the amount of Pd-P2VP nanoparticles. The block copolymers, nanoparticles and nanocomposites were analyzed by size exclusion chromatography (SEC), 1 H nuclear magnetic resonance spectroscopy ( 1 H NMR), UV/Vis spectroscopy (UV/Vis), and energy filtering-transmission electron microscopy (EF-TEM).

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Self-assembled block copolymers: Bulk to thin film

Cited by 109 publications

References 440 publications

Resistor-Network Modeling of Ionic Conduction in Polymer Electrolytes

Resistor-Network Modeling of Ionic Conduction in Polymer Electrolytes

Synthesis of poly(L,L-lactic acid-co-lysine) and its cell compatibility evaluation as coating material on metal

Selective embedding of P2VP coated Pd nanoparticles in PS-b-P2VP block copolymers

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