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Article
Inorganic Nanocrystals with Dendrimer Templates: Mesoscopic Model System and Route to New Nanocomposites
We investigate nanostructures that are formed when dendrimers act as hosts. Poly(amidoamine) (PAMAM) dendrimers can be used as templates for inorganic nanocrystals, both in aqueous solution1-3 and in a polymeric ...
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Article
Organic-Inorganic Hybrid Particles by Dendrimer Nanotemplating
Poly (amidoamine) (PAMAM) dendrimers are used to create organic-inorganic hybrid colloids in aqueous solution. The formation of gold colloids upon reduction of a gold salt precursor serves as a model reaction ...
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Article
Chromatographic Separation of Single Wall Carbon Nanotubes
Size exclusion chromatography (SEC) is shown to be an effective method to characterize single wall carbon nanotube (SWNT) dispersions. SEC separates nanotube dispersions by size, and measures the intrinsic vis...
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Article
Determination of Pore Size Distributions in Nano-Porous Thin Films from Small Angle Scattering
Small angle neutron and x-ray scattering (SANS, SAXS) are powerful tools in determination of the pore size and content of nano-porous materials with low dielectric constants (low-k) that are being developed as...
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Article
Characterization of Nanoporous Low-k Thin Films by Contrast Match SANS
Small-angle neutron scattering (SANS) contrast variation is used to characterize matrix properties and pore size in nanoporous low-dielectric constant (low-k) thin films. Using a vapor adsorption technique, SA...
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Article
Structure and property characterization of low-k dielectric porous thin films
A novel methodology is developed that uses a combination of high energy ion scattering, x-ray reflectivity, and small angle neutron scattering to characterize the structure and properties of porous thin films....
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Article
Nanometer Calibration Particles: What is Available and What is Needed?
Information on available polystyrene calibration spheres is presented regarding the particle diameter, uncertainty in the size, and the width of the size distribution for particles in a size range between 20 a...
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Article
Compatibilizers made from Copolymers that Exhibit Strong Interactions
Random copolymers of poly(methyl methacrylate-d8) (PMMA) and poly(methacrylic acid) (PMAA) were synthesized and blended with polyethylene oxide (PEO), and SANS was used to estimate the strength of interaction ...
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Article
Synthesis and Characterization of Organic/Inorganic Interpenetrating Polymer Networks
Interpenetrating polymer networks have been synthesized by performing sol-gel chemistry and conventional organic polymerizations in mixtures of the monomers. The organic polymers were acrylates, and the inorga...
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Article
Small Angle Neutron Scattering Studies of Single Phase IPNs
Interpenetrating polymer networks (IPNs) have been synthesized from polymers that form miscible polymer blends. Full, semi-I and semi-II IPNs made from polystyrene-d8 and poly(vinylmethylether) can be made to ...
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Article
Small Angle Neutron Scattering Studies of Blends of Protonated Linear Polystyrene with Crosslinked Deuterated Polystyrene
Small angle neutron scattering (SANS) has been used to study the scattering function and thermodynamics of blends of linear protonated polystyrene (PSH) and crosslinked deuterated polystyrene (PSD). Two series...
