New Polyelectrolyte Architectures

Bohrisch, Jörg; Eisenbach, Claus D.; Jaeger, Werner; Mori, Hideharu; Müller, Axel H. E.; Rehahn, Matthias; Schaller, Christian; Traser, Steffen; Wittmeyer, Patrick

doi:10.1007/b11266

Cited by 55 publications

(51 citation statements)

References 160 publications

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“…However, star polymers expand significantly less than linear polymers of the same molecular weight. [13] This suggests that less roughness will be introduced to the sidewall during the development step if a star resist is substituted for a linear resist.…”

Section: Introductionmentioning

confidence: 99%

Comparison of star and linear ArF resists

et al. 2010

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Linear and star-shaped ArF photoresists were prepared and preliminary lithographic comparison was performed using electron-beam exposure. An oligo-initiator based on saccharose forms the core of the star shaped photoresist from which three standard ArF photoresist monomers, α-gamma butyrolactone methacrylate (GBLMA), methyl adamantyl methacrylate (MAMA) and hydroxyl adamantyl methacrylate (HAMA) were polymerized. Conditions were adjusted to obtain a low polydispersity, 6 kg/mol star polymer with a degree of polymerization of approximately five mers per arm. For comparison, a linear photoresist control was prepared using the same scheme. The star resist architecture was found to improve roughness without reducing sensitivity or resolution.

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Section: Introductionmentioning

confidence: 99%

Comparison of star and linear ArF resists

et al. 2010

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“…Owing to the intra-and intermolecular Coulombic interactions, they demonstrate special solution properties, which are strongly influenced by the type and concentration of salt in aqueous solution. In addition to the electrostatic forces, the flexibility of the polymer backbones and molecular architectures also show great impact on their properties [18]. Many theoretical studies on the simple linear polyelectrolytes have revealed the nature of their behavior in aqueous solutions [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…However, polyelectrolytes with other architectures present a more complicated problem. Only recently have polyelectrolytes with nonlinear topologies attracted considerable theoretical and experimental interests, mainly originating in their possible applications as nano-building blocks and nano-templates [18].…”

Section: Introductionmentioning

confidence: 99%

Polyelectrolyte Stars and Cylindrical Brushes

Plamper

Ballauff

et al. 2009

Advances in Polymer Science

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This review summarizes recent work in the field of polyelectrolyte stars and cylindrical brushes. Synthesis of anionic and cationic polyelectrolyte stars and cylindrical brushes by different synthetic strategies is introduced. Solution properties such as titration, osmotic pressure, and inter-polyelectrolyte complexes (IPECs) of the stars and brushes are briefly discussed. We also highlight the use of core-shell polyelectrolyte brushes as the template for the preparation of superparamagnetic hybrid cylinders.

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“…Ionic macromolecules have an ability to change conformation as a response to variations in the ionic strength and pH of solution. Polymers containing ionic groups may be divided into two classes, polyelectrolytes and polyzwitterions 1–8. Polyelectrolytes contain anionic or cationic groups, while polyzwitterions contain both anionic and cationic groups.…”

Section: Introductionmentioning

confidence: 99%

Effect of Chemical Structure and Charge Distribution on Behavior of Polyzwitterions in Solution

Лезов

Vlasov

Polushina

et al. 2012

Macromolecular Symposia

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Summary: The hydrodynamic and conformational properties of polyelectrolyte poly(N,N‐diallyl‐N,N‐dimethylammonium chloride) and its corresponding polybetaine poly(2‐diallyl(methyl)ammonio)acetate) molecules in aqueous solutions with various ionic strength and pH, were studied by viscometry, static and dynamic light scattering methods. It was established that a 1 M NaCl solution is a thermodynamically good solvent for poly(N,N‐diallyl‐N,N‐dimethylammonium chloride). In water solutions conformation of poly(2‐diallyl(methyl)ammonio)acetate) molecules corresponds to polymer coil under θ–conditions. An increase in the concentration of NaCl in water and 0.1M NaOH solutions from 0 to 1 mol/l brings about a sharp gain in the intrinsic viscosity of the polymer and in the hydrodynamic radius of molecules. This effect results from the decomposition of zwitterion pairs responsible for the compact conformation of polymer molecules in water and 0.1 M NaOH. The Kuhn segment length for poly(2‐diallyl(methyl)ammonio)acetate) molecules A = 6.3 nm determined in water and in 0.1 M NaOH solutions practically coincided with A value 6.6 nm, received in 1 M NaCl and in 0.1 M NaOH/1M NaCl. For poly(N,N‐diallyl‐N,N‐dimethylammonium chloride) molecules in 1 M NaCl solutions A = 3.9 nm.

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New Polyelectrolyte Architectures

Cited by 55 publications

References 160 publications

Comparison of star and linear ArF resists

Comparison of star and linear ArF resists

Polyelectrolyte Stars and Cylindrical Brushes

Effect of Chemical Structure and Charge Distribution on Behavior of Polyzwitterions in Solution

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