Highlights
Mar 26, 2009
Stanford University
Green Chemistry of Poly(l-lactides)
W. Swope1, R. Waymouth2, J. Hedrick1, and C. Wade1 1: IBM Almaden Research Center, 2: Stanford University
As part of a series of studies on the green chemistry of poly(l-lactides), we have performed a theoretical study of the mechanism of ring-opening polymerization.
Mar 26, 2009
Stanford University
Polymer Dynamics in Concentrated Solution
Ajay Dambal and Eric Shaqfeh, Dept. of Chemical Engineering, Stanford
The dynamics of entangled polymer solutions far from equilibrium is, at present, a subject of considerable interest because the "natural" modifications to tube or reptation-based theories have not been successful.Â’ In such systems, polymer molecules are highly entangled, which results in the motion o
Mar 26, 2009
Stanford University
Flow-Enhanced Vesicle Deformation in the Four-roll Mill
Susan Muller, Dept. Chemical Engineering, UC Berkeley
This project leverages ongoing research on the dynamics of DNA and vescicles within CPIMA.Â’ We have developed a novel microfluidic four-roll mill that allows all flow types (from extension to shear to rotation) to be accessed and have previously used it to examine DNA tumbling in mixed flows and, most recently, to study vesicle dynamics.
Mar 26, 2009
Stanford University
DNA-tethered Membrane Formation From Giant Unilamellar Vesicles
M. Chung and S. Boxer, Dept. of Chemistry, Stanford University
We have developed two strategies forÂ’ preparing tethered lipid bilayer membrane patches on solid surfaces by DNA hybridization.Â’ In the first strategy, single-stranded DNA strands are immobilized by click chemistry to a silica surface, whose remaining surface is passivated to prevent direct assembly of a solid supported bilayer.Â’ Then giant unilamellar vesicles (G
Mar 25, 2009
Johns Hopkins University
High School Student Research Internships at the Johns Hopkins MRSEC
The JHU MRSEC conducts extensive K-12 educational outreach programs aimed at promoting interest in and awareness of the importance of modern materials research.
Mar 24, 2009
Princeton University
PUMA Students' Minds Energized by Energy
Students from Trenton, NJ participated in PCCM's Princeton University Materials Academy (PUMA), learning about materials science and engineering related to energy sustainability. Working with PCCM faculty Wole Soboyejo and Craig Arnold and their graduate students, the PUMA high school students built their own solar ovens and solar cells from readily available materials, while a guest speaker shared her firsthand experience of the impact of solar cookers in economically and politically devastated regions of the world.
Mar 21, 2009
University of Massachusetts Amherst
Colloidosome Assemblies.
Rotello developed a very rapid and convenient method for fabricating
microspheres with walls made of nanoparticles, known as colloidosomes.
In this method alkyne and azide functionalized iron oxide nanoparticles
are co-assembled at the water-in oil-interface and covalently linked
using “click” chemistry under ambient conditions to create magnetic
colloidosomes. These colloidosomes are highly stable in water, have
size selective permeability, and are responsive towards external
Mar 21, 2009
University of Massachusetts Amherst
Macroscopic Addressable Arrays of Block Copolymers With Areal Densities of 10 Terabit/inch2 and Beyond
A collaboration between researchers funded by the DOE and NSF-supported
MRSEC and CHM at UC Berkeley and UMASS Amherst has led to a
breakthrough in the areal density of templates derived from block
copolymers (BCPs) having orientational registry over macroscopic
distances. The facets on a reconstructed single crystal surface, like
sapphire, were used to guide and direct the self-assembly of BCPs
having 3 nm cylindrical domains over arbitrarily large surfaces.
Grazing incidence x-ray scattering (GISAXS) quantitatively demonstrated
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