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Articles 1 - 30 of 35
Full-Text Articles in Entire DC Network
Modeling Chain Packing In Complex Phases Of Self-Assembled Block Copolymers, Anugu Abhiram Reddy
Modeling Chain Packing In Complex Phases Of Self-Assembled Block Copolymers, Anugu Abhiram Reddy
Doctoral Dissertations
Block copolymer (BCP) melts undergo microphase seperation and form ordered soft matter crystals with varying domain shapes and symmetries. We study the con- nection between diblock copolymer molecular designs and thermodynamic selection of ordered crystals by modeling features of variable sub-domain geometry filled with individual blocks within non-canonical sphere-like and network phases that together with layered, cylindrical and canonical spherical phases forms “natural forms” of self- assembled amphiphilic soft matter at large. First, we present a model to revise our understanding of optimal Frank-Kasper sphere-like morphologies by advancing the- ory to account for varying domain volumes. We then develop generic …
Self-Assembling Networks In Soft Materials, Ishan Prasad
Self-Assembling Networks In Soft Materials, Ishan Prasad
Doctoral Dissertations
This dissertation presents a study on heterogeneous network structure in two distinct classes of soft material systems: disordered assemblies of jammed binary spheres and ordered morphologies of block copolymer melts. The aim is to investigate the combined role of geometry and entropy in structure formation of soft matter assemblies. First, we investigate the influence of particle size asymmetry on structural properties of jammed binary sphere mixtures. We give evidence of two distinct classes of materials separated by a critical size ratio that marks the onset of a sharp transition due to simultaneous jamming of a sub-component of the packing. We …
Guiding The Self-Assembly Of Block Copolymers In 2d And 3d With Minimal Patterning, Jaewon Choi
Guiding The Self-Assembly Of Block Copolymers In 2d And 3d With Minimal Patterning, Jaewon Choi
Doctoral Dissertations
Directed self-assembly (DSA) of block copolymers (BCPs) based on topographic patterns is one of the most promising strategies for overcoming resolution limitations in the current lithographic process and fabricating the next generation data storage devices. While the DSA of BCPs with deep topographic patterning has been extensively studied both experimentally and theoretically over the past two decades, less attention has been paid to the development of the DSA process using minimal topographic patterning. This dissertation focuses on understanding the effect of minimal topographic patterning on guiding the self-assembly of BCPs in 2D and 3D. We demonstrate that minimal trench patterns …
Cell Adhesion Biophysics On Dynamic Polymer Constructs, Andreas Kourouklis
Cell Adhesion Biophysics On Dynamic Polymer Constructs, Andreas Kourouklis
Doctoral Dissertations
The biophysical characteristics of cell adhesion from single protein to cell length scales have primarily been studied using purely elastic substrates. However, natural extracellular matrix (ECM) is viscoelastic and contains mobile components. In this work, we combined chemistry and cell biology tools to design and characterize laterally mobile viscoelastic polymer films that promote receptor-specific cell adhesion. Moreover, we used amphiphilic block copolymers that are end-labeled with RGD peptide ligands to allow for integrin-mediated cell adhesion. The addition of a trace hydrophobic homopolymer in the supported bilayer block-copolymer films is used to tune the lateral mobility of the films. NIH 3T3 …
Photocleavable Junctions In Complex Polymer Architectures And Photoetchable Thermoplastics, Elizabeth Surles Sterner
Photocleavable Junctions In Complex Polymer Architectures And Photoetchable Thermoplastics, Elizabeth Surles Sterner
Doctoral Dissertations
Polymer materials have become important tools in nanomanufacturing due to their facile processing and ready attainment of the necessary feature sizes. The development of cleavable junctions has led to advances in the production of polymer nanotemplates. Photocleavage strategies have come to the forefront of the field because photons, as a cleavage stimulus, do not have the mass-transport limitations of chemical methods, and provide for targeted two- and three-dimensional feature control. This dissertation presents a method for producing photocleavable materials by one-pot copper-catalyzed azide-alkyne “click” chemistry (CuAAC), activator regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) and activated ester …
Helical Ordering In Chiral Block Copolymers, Wei Zhao
Helical Ordering In Chiral Block Copolymers, Wei Zhao
Open Access Dissertations
The phase behavior of chiral block copolymers (BCPs*), namely, BCPs with at least one of the constituent block is formed by chiral monomers, is studied both experimentally and theoretically. Specifically, the formation of a unique morphology with helical sense, the H* phase, where the chiral block forms nanohelices hexagonally embedded in the matrix of achiral block, is investigated. Such unique morphology was first observed in the cast film of polystyrene-b-poly(L-lactide) (PS-b-PLLA) from a neutral solvent dichloromethane at room temperature with all the nanohelices being left-handed, which would switch to right-handed if the PLLA block changes to …
Pla-Peo-Pla Triblock Copolymer Hydrogels For Soft Tissue Engineering : Properties, Assembly, And Structure., Naomi Sanabria Delong
Pla-Peo-Pla Triblock Copolymer Hydrogels For Soft Tissue Engineering : Properties, Assembly, And Structure., Naomi Sanabria Delong
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Water-Soluble Polymers From Norbornene Monomers., Sterling F. Alfred
Water-Soluble Polymers From Norbornene Monomers., Sterling F. Alfred
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Influence Of Ion-Complexation On The Alignment Of Polystyrene-Block-Poly(Methyl Methacrylate) Copolymer Thin Films Under An Electric Field., Jia-Yu Wang
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Ionic And Nonionic Polymer Gels., Jessica L. Mccoy
Ionic And Nonionic Polymer Gels., Jessica L. Mccoy
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Hierarchical Organization In Polymeric Systems., Dongseok Shin
Hierarchical Organization In Polymeric Systems., Dongseok Shin
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Nanoscale Physics Of Polymeric Liquid On Silicon Dioxide Nanotemplates From Block Copolymer Thin Films., Narupol Intasanta
Nanoscale Physics Of Polymeric Liquid On Silicon Dioxide Nanotemplates From Block Copolymer Thin Films., Narupol Intasanta
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Grain Growth Kinetics In Microphase Separated Anbn Star Block Copolymers., Xiaochuan Hu
Grain Growth Kinetics In Microphase Separated Anbn Star Block Copolymers., Xiaochuan Hu
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Solvent Enhanced Block Copolymer Ordering In Thin Films., Matthew J. Misner
Solvent Enhanced Block Copolymer Ordering In Thin Films., Matthew J. Misner
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Morphologies And Tensile Properties Of Block Copolymers With Different Molecular Architectures., Yuqing Zhu
Morphologies And Tensile Properties Of Block Copolymers With Different Molecular Architectures., Yuqing Zhu
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Miktoarm Star Block Copolymers : Effects Of Molecular Architecture On Morphology., Lizhang Yang
Miktoarm Star Block Copolymers : Effects Of Molecular Architecture On Morphology., Lizhang Yang
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Alignment Of Diblock Copolymers With Electric Fields., Jason Derouchey
Alignment Of Diblock Copolymers With Electric Fields., Jason Derouchey
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Nanostructures Of Crystalline Block Copolymers., Sheng Hong
Nanostructures Of Crystalline Block Copolymers., Sheng Hong
Doctoral Dissertations 1896 - February 2014
No abstract provided.
The Disorder-To-Order Phase Transition In Poly(Styrene-Block-N-Butyl Methacrylate) : The Effect Of Pressure., Michael Anthony Pollard
The Disorder-To-Order Phase Transition In Poly(Styrene-Block-N-Butyl Methacrylate) : The Effect Of Pressure., Michael Anthony Pollard
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Controlling Polymer Thin Film Structures By Tuning Interfacial Interactions., Elbert E. Huang
Controlling Polymer Thin Film Structures By Tuning Interfacial Interactions., Elbert E. Huang
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Synthesis And Characterization Of Blends Of Poly(Ethylene-B-(Atactic)Propylene) With Polyethylene., Andrew A. Bushelman
Synthesis And Characterization Of Blends Of Poly(Ethylene-B-(Atactic)Propylene) With Polyethylene., Andrew A. Bushelman
Doctoral Dissertations 1896 - February 2014
No abstract provided.
The Morphological Behavior Of Miktoarm Star And Multiple-Graft Block Copolymers., Frederick Louis Beyer
The Morphological Behavior Of Miktoarm Star And Multiple-Graft Block Copolymers., Frederick Louis Beyer
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Synthesis Of Organic-Inorganic Hybrids Via Ozone Chemistry : Synthesis, Characterization And Mechanical Properties Of Polystyrene-Polyetherimide Aba Block Copolymers., Anthony G. Karandinos
Synthesis Of Organic-Inorganic Hybrids Via Ozone Chemistry : Synthesis, Characterization And Mechanical Properties Of Polystyrene-Polyetherimide Aba Block Copolymers., Anthony G. Karandinos
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Synthesis, Characterization, And Modelling Of Pblg-Pi Rod-Coil Diblock Copolymers :: Microstructure In Solution And At Interfaces/, Diane E. Bennett
Synthesis, Characterization, And Modelling Of Pblg-Pi Rod-Coil Diblock Copolymers :: Microstructure In Solution And At Interfaces/, Diane E. Bennett
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Liquid Crystal Block Oligomers Of Linear And Star Topology/, K. Troy Milliken
Liquid Crystal Block Oligomers Of Linear And Star Topology/, K. Troy Milliken
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Melt Crystallization Of Ferroelectric Copolymers Of Poly(Vinylidene Fluoride-Trifluoroethylene)/, Katherine Antolin Bakeev
Melt Crystallization Of Ferroelectric Copolymers Of Poly(Vinylidene Fluoride-Trifluoroethylene)/, Katherine Antolin Bakeev
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Molecular Aspects Of Rubberlike Elasticity :: A Comparison Of Two Different Network Systems/, Bert J. Reekmans
Molecular Aspects Of Rubberlike Elasticity :: A Comparison Of Two Different Network Systems/, Bert J. Reekmans
Doctoral Dissertations 1896 - February 2014
No abstract provided.
The Influence Of Surfaces On Structure Formation/, John R. Reffner
The Influence Of Surfaces On Structure Formation/, John R. Reffner
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Density Functional Theory Of Microphase Separation In Block Copolymers And Monte Carlo Simulations Of Polyelectrolyte Electrophoresis/, James M. Melenkevitz
Density Functional Theory Of Microphase Separation In Block Copolymers And Monte Carlo Simulations Of Polyelectrolyte Electrophoresis/, James M. Melenkevitz
Doctoral Dissertations 1896 - February 2014
No abstract provided.
Morphologies And Morphological Transitions In Binary Blends Of Diblock Copolymer And Homopolymer/, Karen Irene Winey
Morphologies And Morphological Transitions In Binary Blends Of Diblock Copolymer And Homopolymer/, Karen Irene Winey
Doctoral Dissertations 1896 - February 2014
No abstract provided.