News
Spontaneous Motion in Hierarchically Assembled Active matter
Most conventional materials are assembled from inanimate building blocks. We have explored the behavior of soft materials in which constituent energy consuming units that are assembled from animate energy consuming components. Thousands of these components spontaneously coordinate their microscopic activity to yield novel gels, liquid crystals and emulsions that crawl, flow, stream, spontaneously fracture and self-heal, thus mimicking some of the characteristics of living biological organisms.
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Engineering the Electronic Structure of Crystalline Oxide Layers
One avenue to creating new materials with useful electronic properties is to take existing materials and modify their structure at the level of the bonds between the constituent atoms: this is feasible because the distribution of electrons around an atom is sensitive to subtle atomic-scale distortion of its bonds. For this type of approach to succeed, one needs theoretical input on how the atoms should be arranged to achieve some desired electronic distribution.
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Finding a glass needle in a haystack
Metals that are glasses and can be formed like plastics are called bulk metallic glasses (BMG). But not all metals can be glasses and one has to sort through a large number of chemical compositions to find a good BMG. a trial and error processes could take up to a day to decide if a single composition can be molded. Sorting through hundreds of BMGs that are composed of four chemical elements would take up to a year. Now, with CRISP’s new combinatorial deposition system, more than 800 different compositions can be synthesized and characterized in a day.
News
Mussel protein adhesion to mica surpasses biotin-avidin affinity
Asymmetrical films of adhesive protein Mfp-5 show significantly higher reversible adhesion to smooth mica surfaces than the “gold standard” of noncovalent binding: well-ordered avidin-biotin interactions. The insights are crucial for intelligent translation of mussel adhesion to engineered systems.
News
A Key Signature of Dirac Fermions
In solids, the kinetic energy of an
electron generally increases as the square of its momentum. By contrast, in a
Topological Insulator such as Bi2Te2Se, electrons on the surface are
predicted to be Dirac Fermions for which the energy increases linearly with
momentum. In a magnetic field B, the
allowed states of an electron are quantized into Landau Levels (LLs). The
sequential emptying of occupied LLs in an increasing field leads to quantum
News
Coupling a Single Electron Spin to a Microwave Cavity
IRG-D researchers at Princeton University have combined superconducting qubit technology with single spin devices, demonstrating that the microwave field of a superconducting resonator is sensitive to the spin of a single electron. The device may allow two spatially separated electron spins to be coupled, resulting in quantum entanglement.
News
Materials Science from CU
MSFCU has been extraordinarily successful in reaching Colorado K-12 students with
physical sciences
presentations tuned for
the Colorado curriculum. To date nearly 2000 classes have served over 78,000
News
Perfectly Organized Gold Nanorings
Creating well-organized conducting nanostructures in a flexible polymer matrix provides platforms for numerous
applications in optics, sensors, and wave-guiding structures. Working in the Materials Research Science and
Engineering Center (MRSEC) on Polymers at the University of Massachusetts
Amherst, Thayumanavan and Russell achieved self-assembled hybrid
structures from diblock copolymers and gold nanoparticles, where the
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