Lamellae orientation in block copolymer films with ionic complexes.

Lamellae orientation in block copolymer films with ionic complexes. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Lamellae orientation in block copolymer films with ionic complexes. Abstract Text:

Jia-Yu Wang,Wei Chen,James D Sievert,Thomas P Russell,

Lamellae orientation in lithium-complexed polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) copolymer films on natively oxidized silicon wafers is investigated as a function of film thickness and percentage of carbonyl groups coordinated with lithium ions using cross-sectional transmission electron microscopy and grazing incidence small-angle X-ray scattering. For films with a lower percentage of ionic complexes, the strong surface interaction of the PMMA blocks with the substrate is not changed significantly and the orientation of the lamellar microdomains depends on the film thickness and is dictated by a coupling of the interfacial interactions and the degree of microphase separation. For films with a higher percentage of ionic complexes, the surface interaction is mediated. Along with the enhanced immiscibility between the two blocks, which drives the self-assembly into a stronger microphase segregation, an orientation of the lamellar microdomains normal to the surface is seen, independent of film thickness. Thus, by tuning the amount of ionic complexes, the orientation of lamellar microdomain can be controlled from a random arrangement to being oriented parallel or perpendicular to the film surface without any surface modification or use of external fields, which opens a simple and general route for the fabrication of nanostructured materials.

Lamellae orientation in block copolymer films with ionic complexes. Publishing Authors By Initials

JY Wang,W Chen,JD Sievert,TP Russell,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Lamellae orientation in block copolymer films with ionic complexes. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Langmuir : the ACS journal of surfaces and colloid

VOLUME: 24

Page Numbers: 3545-50

Journal Abbreviation:

ISSN: 0743-7463

DAY: 19

MONTH: 02

YEAR: 2008

Lamellae orientation in block copolymer films with ionic complexes. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9882736

Lamellae orientation in block copolymer films with ionic complexes. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Lamellae orientation in block copolymer films with ionic complexes. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Lamellae orientation in block copolymer films with ionic complexes.

AFFILIATION: Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003.

Country: United States

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Langmuir

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Lamellae orientation in block copolymer films with ionic complexes Related Publications

• Autonomic dysfunction in obstructive sleep apnea is associated with impaired glucose regulation.
• Binding isotherms by continuous-flow dynamic dialysis.
• Columnar cell variant of papillary thyroid carcinoma.
• Commentary to 'Comorbidity in Finnish migraine families'.
• Comparison of the genetic effects of equimolar doses of ENU and MNU: while the chemicals differ dramatically in their mutagenicity in stem-cell spermatogonia, both elicit very high mutation rates in differentiating spermatogonia.
• Dynamic posttranscriptional regulation of epsilon-globin gene expression in vivo.
• Enzymatic reduction of oxysterols impairs LXR signaling in cultured cells and the livers of mice.
• Evidence-based fertility treatment: what do we mean?
• Foamy-virus-mediated gene transfer to canine repopulating cells.
• In vivo quantitation of intratumoral radioisotope uptake using micro-single photon emission computed tomography/computed tomography.
• Infected cell carriers: a new strategy for systemic delivery of oncolytic measles viruses in cancer virotherapy.
• Letter to the editor.
• Magnesium deficiency in patients on home enteral nutrition.
• Metabotropic glutamate receptor 3 protects neurons from glucose-induced oxidative injury by increasing intracellular glutathione concentration.
• Morphine-stimulated nitric oxide release in rabbit aqueous humor.
• Mutation of beta-glucosidase 2 causes glycolipid storage disease and impaired male fertility.
• Nonspecific binding to structured RNA and preferential unwinding of an exposed helix by the CYT-19 protein, a DEAD-box RNA chaperone.
• Novel transparent nano- to micro-heterogeneous substrates for in-situ cell migration study.
• Obscurin-like 1, OBSL1, is a novel cytoskeletal protein related to obscurin.
• Ovine bronchial-derived relaxing factor: changes with development and hyperoxic ventilation.
• Probing the mechanisms of DEAD-box proteins as general RNA chaperones: the C-terminal domain of CYT-19 mediates general recognition of RNA.
• Relationship of seminal vesicle size and measures of libido in yearling beef bulls.
• Removal of Ocular Artifacts from EEG: A Comparison of Adaptive Filtering Method and Regression Method Using Simulated Data.
• Small animal absorbed radiation dose from serial micro-computed tomography imaging.
• Solitary intramedullary plasmacytoma of the skull base mimicking aggressive meningioma.
• Spring-loaded heptad repeat residues regulate the expression and activation of paramyxovirus fusion protein.
• Structural polymorphism of I-E subregion antigens determined by a gene in the H-2K to I-B genetic interval.
• T-cell depletion eliminates the development of cardiac allograft vasculopathy in mice rendered tolerant by the induction of mixed chimerism.
• The prevalence and characteristics of migraine in twins from the general population.
• Who is publishing in Theriogenology and on what subjects?