Block Copolymer Based Nanostructures: Materials, Processes, and Applications to Electronics

Kim, Ho-Cheol; Park, Sang-Min; Hinsberg, William D.

doi:10.1021/cr900159v

Cited by 929 publications

(845 citation statements)

References 174 publications

Supporting

Mentioning

839

Contrasting

Unclassified

Order By: Relevance

“…polymersomes), 65,[68][69][70] which have potential applications in nanomedicine, cell biology, electronics, energy and catalysis. [71][72][73][74] Block copolymer self-assembly is traditionally performed via post-polymerization processing of soluble copolymers using a solvent switch, 65 a pH switch 75 or thin film rehydration techniques. 76 However, these processing techniques are typically only utilized in relatively dilute solution (< 1 %).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of poly(amino acid methacrylate)-stabilized diblock copolymer nano-objects

et al. 2015

View full text Add to dashboard Cite

International audienceAmino acids constitute one of Nature's most important building blocks. Their remarkably diverse properties (hydrophobic/hydrophilic character, charge density, chirality, reversible cross-linking etc.) dictate the structure and function of proteins. The synthesis of artificial peptides and proteins comprising main chain amino acids is of particular importance for nanomedicine. However, synthetic polymers bearing amino acid side-chains are more readily prepared and may offer desirable properties for various biomedical applications. Herein we describe an efficient route for the synthesis of poly(amino acid methacrylate)-stabilized diblock copolymer nano-objects. First, either cysteine or glutathione is reacted with a commercially available methacrylate-acrylate adduct to produce the corresponding amino acid-based methacrylic monomer (CysMA or GSHMA). Well-defined water-soluble macromolecular chain transfer agents (PCysMA or PGSHMA macro-CTAs) are then prepared via RAFT polymerization, which are then chain-extended via aqueous RAFT dispersion polymerization of 2-hydroxypropyl methacrylate. In situ polymerization- induced self-assembly (PISA) occurs to produce sterically-stabilized diblock copolymer nano-objects. Although only spherical nanoparticles could be obtained when PGSHMA was used as the sole macro-CTA, either spheres, worms or vesicles can be prepared using either PCysMA macro-CTA alone or binary mixtures of poly(glycerol monomethacrylate) (PGMA) with either PCysMA or PGSHMA macro-CTAs. The worms formed soft free-standing thermo-responsive gels that undergo degelation on cooling as a result of a worm-to-sphere transition. Aqueous electrophoresis studies indicate that all three copolymer morphologies exhibit cationic character below pH 3.5 and anionic character above pH 3.5. This pH sensitivity corresponds to the known behavior of the poly(amino acid methacrylate) steric stabilizer chains

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of poly(amino acid methacrylate)-stabilized diblock copolymer nano-objects

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Beyond their mere aesthetic value, some of the resulting ordered and disordered structures of diblock copolymers have found uses as nanoscale templates and filters 4,5 . Colloidal analogues, however, have thus far only given rise to disordered microphases, such as clusters and gels [6][7][8] .…”

mentioning

confidence: 99%

Communication: Microphase equilibrium and assembly dynamics

Zhuang

Charbonneau

2017

The Journal of Chemical Physics

View full text Add to dashboard Cite

Despite many attempts, ordered equilibrium microphases have yet to be obtained in experimental colloidal suspensions. The recent computation of the equilibrium phase diagram of a microscopic, particle-based microphase former (Zhuang et al., Phys. Rev. Lett. 116, 098301 (2016)) has nonetheless found such mesoscale assemblies to be thermodynamically stable. Here, we consider their equilibrium and assembly dynamics. At intermediate densities above the order-disorder transition, we identify four different dynamical regimes and the structural changes that underlie the dynamical crossovers from one disordered regime to the next. Below the order-disorder transition, we also find that periodic lamellae are the most dynamically accessible of the periodic microphases. Our analysis thus offers a comprehensive view of the disordered microphase dynamics and a route to the assembly of periodic microphases in a putative well-controlled, experimental system.

show abstract

“…The self-assembly of block copolymers (BCPs) is another template-based fabrication route to achieve 2D ordering of nanostructures. 188,189 Under appropriate conditions, BCPs selfassemble or phase-separate to form ordered nanoscale patterns, such as aligned cylinders and lamellas, of constituent blocks with a domain spacing that depends on the molecular weight, segment 5 size and the strength of interaction between the polymer blocks. [188][189][190] BCP thin films can be transformed into nanoscale templates with well-ordered 2D patterns by selective removal of one of the constituent blocks of the copolymer [188][189][190] .…”

Section: Two-dimensional Ferroelectric Nanostructuresmentioning

confidence: 99%

“…188,189 Under appropriate conditions, BCPs selfassemble or phase-separate to form ordered nanoscale patterns, such as aligned cylinders and lamellas, of constituent blocks with a domain spacing that depends on the molecular weight, segment 5 size and the strength of interaction between the polymer blocks. [188][189][190] BCP thin films can be transformed into nanoscale templates with well-ordered 2D patterns by selective removal of one of the constituent blocks of the copolymer [188][189][190] . Kang et al 135 used a polystyrene-b-poly(ethyleneoxide) (PS-b-PEO) di-10 block polymer template for the confined crystallisation of the ferroelectric polymer PVDF-TrFE into trenches, which were 30 nm in width and 50 nm in periodicity.…”

Section: Two-dimensional Ferroelectric Nanostructuresmentioning

confidence: 99%

Ferroelectric nanoparticles, wires and tubes: synthesis, characterisation and applications

2013

View full text Add to dashboard Cite

Nanostructured materials are central to the evolution of future electronics and information technologies. Ferroelectrics have already been established as a dominant branch in the electronics sector because of their diverse application range such as ferroelectric memories, ferroelectric tunnel junctions, etc. The on-going dimensional downscaling of materials to allow packing of increased numbers of components onto integrated circuits provides the momentum for the evolution of nanostructured ferroelectric materials and devices. Nanoscaling of ferroelectric materials can result in a modification of their functionality, such as phase transition temperature or Curie temperature (TC), domain dynamics, dielectric constant, coercive field, spontaneous polarisation and piezoelectric response. Furthermore, nanoscaling can be used to form high density arrays of monodomain ferroelectric nanostructures, which is desirable for the miniaturisation of memory devices. This review article highlights some research breakthroughs in the fabrication, characterisation and applications of nanoscale ferroelectric materials over the last decade, with priority given to novel synthetic strategies

show abstract

Block Copolymer Based Nanostructures: Materials, Processes, and Applications to Electronics

Cited by 929 publications

References 174 publications

Synthesis and characterization of poly(amino acid methacrylate)-stabilized diblock copolymer nano-objects

Synthesis and characterization of poly(amino acid methacrylate)-stabilized diblock copolymer nano-objects

Communication: Microphase equilibrium and assembly dynamics

Ferroelectric nanoparticles, wires and tubes: synthesis, characterisation and applications

Contact Info

Product

Resources

About