MIT Products Lab (MRL) interns covered a large range of challenges this summer, working with materials as soft as silk to as hard as iron and at temperatures from as low as that of liquid helium (-452.47 degrees Fahrenheit) to as high as that of melted copper (1,984 F).
Simon Egner, from the University of Illinois at Urbana-Champaign, made samples of lead tin telluride to spot mid-infrared light at wavelengths from 4 to 7 microns for incorporated photonic applications. Egner determined several products properties of the samples, consisting of the concentration and mobility of electrons. “One thing we have actually come up with just recently is adding lead oxide to attempt to reduce the amount of noise we get when sensing light with our detectors,” Egner says.Lead tin telluride is an alloy of lead telluride and tin telluride, discusses Peter Su, a products science and engineering graduate trainee in the laboratory of MIT Materials Research Study Laboratory Principal Research Study Researcher Anuradha Agarwal.”If you have a lot of providers already present in your product, you get a lot of extrasound, a great deal of background signal, above which it’s actually hard to identify the new providers generated by the light striking your product, “Su states.”We’re aiming to reduce that noise level by reducing the carrier concentration and we’re aiming to do that by adding lead oxide to that alloy.”Thin films for photonics Summer Scholar Alvin Chang, from Oregon State University
, produced chalcogenide thin
films with non-linear homes for photonics applications. He worked with postdoc Samuel Serna in the lab of associate teacher of products science and engineering Juejun Hu. Chang varied the density of two different structures, among germanium, antimony and sulfur(GSS)and the other of germanium, antimony, and selenium(GSSE ), creating a gradient, or ratio, in between the 2 across the length of the movie.”The GSS and GSSE both have various advantages and downsides, “Chang describes.”We’re hoping that by combining the two together in a film
we can arrange of optimize both their benefits and drawbacks so that they would be complementary with each other. “These materials, called chalcogenide glasses, can be utilized for infrared sensing and imaging. Anyone thinking about discovering more about Chang’s work can view this video. Nanocomposite assembly Both Roxbury Neighborhood College chemistry and biotechnology Teacher Kimberly Stieglitz and Roxbury Community University student Credoritch Joseph operated in the lab ofassistant teacher in products science and engineering
Robert J. Macfarlane. The Macfarlane Lab grafts DNA to nanoparticles, which make it possible for exact control over self-assembly of molecular structures. The lab is also creating a new class of chemical structure blocks that it calls Nanocomposite Tectons, or NCTs, which present new opportunities for self-assembly of composite materials.Joseph discovered the multi-step procedure of producing self-assembled DNA-nanoparticle aggregates, and utilized the ones he prepared to study the stability of the aggregates when exposed to various chemicals. Stieglitz created NCTs consisting of clusters of gold nanoparticles with attached polymers and analyzed their melting behavior in polymer services.”They’re really nanoparticles that are linked together through hydrogen bonding networks, “Stieglitz explains.Strengthening aerospace composites Abigail Nason, from the University of Florida, studied the potential advantages of integrating carbon nanotubes into carbon fiber enhanced plastic [CFRP] by means of a procedure called”nanostitching”in the laboratory of Brian L. Wardle, teacher
of aeronautics and astronautics.Bundles of carbon microfibers, which are called tows, are used to make sheets of aerospace-grade carbon fiber strengthened plastic. Dealing with graduate student Reed Kopp, Nason took 3-D scans of looking for a way to promote repair work of myelin in MS clients so that neurological function can be brought back. To much better understand how remyelination works, we are developing polymer-based materialsto engineer designs of MS sores that imitate mechanical stiffness of genuine lesions in the brain,” Jagielska explains. Nieves Muñoz used stereolithography 3-D printing to create cross-linked polymers with differing degrees of mechanical tightness and carried out atomic force microscopy studies to determine the stiffness
of his samples.” Our long-lasting goal is to utilize these designs of lesions and brain tissue to develop drugs that can stimulate myelin repair,”Nieves Muñoz states.”As a mechanical engineering major, it has been interesting to work and learn from individuals with varied backgrounds.”Other MIT Products Research Laboratory interns took on tasks including
superconducting thin films, quantum dots for solar, spinning particles with magnetism, carbon-activated silk fibers, water-based iron circulation batteries, and polymer-based neuro fibers. A variation of this post, including additional MRL summer intern success stories,< a href= http://mrl.mit.edu/index.php/157-at-the-forefront-of-new-technology > originally appeared on the Products Research study Lab site.