News
Site-Specific Stamping of Graphene
Graphene (2-D carbon) is being considered for spintronics due to its low spin-orbit coupling. While graphene-based devices are being made one-at-a-time successfully, there is a need for a high-throughput fabrication method.
News
Immucor Acquires Sentilus for Microarray-Based Diagnostics Technology
Immucor,
Inc., a global leader in transfusion and transplantation diagnostics, has
acquired Sentilus,
Inc., a company focused on developing a novel, inkjet-printed antibody
microarray-based technology called Femtoarrays™.
News
Mechanics of crack deflection at a twist grain boundary
Heterogeneous brittle solids such as ceramics, lamellar intermetallics, and olycrystalline hexagonal-close-packed (hcp) metals such as Zr, Zn and Cd are echnologically important and broadly used. Zirconium, for example, has a low bsorption cross section for neutrons, and is therefore used in nuclear energy pplications. Titanium aluminide (TiAl) is a candidate material for many
News
Magnetically-responsive stiffness of carbon nanotube arrays
Professor Buehler of IRG-II has employed atomistic-based multiscale simulations to theoretically demonstrate the concept of “mechanomutability," i.e. the capability of a material to change its mechanical properties reversibly in response to an external stimulus.
News
Understanding Loops in Polymer Networks Results in an Improved Theory for Rubbery Materials
MRSEC researchers have used newly developed loop counting methods to precisely measure the storage moduli and loop fractions of a range of rubbery gels. A new theory, called Real Elastic Network Theory (RENT) was derived that describes how loop defects affect bulk elasticity.
News
Crystalline oxides on silicon
Researchers at Yale University have invented a high-performance material for future generations of transistors and devices. New oxide materials are required to make faster computer chips for the future. These new oxides will replace the oxide that has been the standard for the last 50 years, silicon dioxide. To replace silicon dioxide, these new oxides must perform better by having a large dielectric constant and a small leakage current. The oxide LaAlO3 has a dielectric constant that is six times larger than that of silicon dioxide.
News
High-energy batteries using genetically-engineered viruses
Professor Belcher previously engineered viruses that could build an anode by coating themselves with cobalt oxide and gold and self-assembling to form a nanowire.
In the new work, the research team created a cathode to pair with the anode: they genetically engineered viruses that first coat themselves with iron phosphate, then attach to carbon nanotubes to create a highly conductive material.
News
Rapid Generation and Screening of Complex Polymer Morphologies
Block copolymers, with their complex morphologies, are widely used in many applications. A grand challenge associated with these materials is accelerating their design and discovery.
UC Santa Barbara MRSEC researchers have developed a versatile and efficient strategy by rapidly building expansive, high-quality, and detailed block copolymer libraries through a combination of controlled polymerization and chromatographic separation. X-ray scattering studies aid in screening block copolymer morphology.
News
Self-Repairable Polyurethane Networks
Polyurethanes have many properties that qualify them as high performance polymeric materials, but they still suffer from mechanical damage. We report the development of polyurethane networks that exhibit self-repairing characteristics upon exposure to ultraviolet light. The network consists of an oxetane-substituted chitosan precursor incorporated into a two-component polyurethane. Upon mechanical damage of the network, four-member oxetane rings open to create two reactive ends.
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