Carbon-based heterogeneous catalysts synthesized from renewable feedstock enable the conversion of biomass to biofuels and to biorenewable chemicals. The Tessonnier group uses approaches inspired from nature and from organic/organometallic chemistry to synthesize novel nanocarbon-based and nanocarbon-supported heterogeneous catalysts. For example, we recently developed basic catalysts made solely of C and N, which demonstrated an exceptional activity and stability for the synthesis of biodiesel, used as a model biomass conversion reaction.
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Intermetallic compounds play important roles in modern functional materials, such as electronic devices, special alloys for usages in aerospace, superconductors, and energy storage and conversion. We are making quality single crystalline materials and to evaluate their electronic, magnetic, and thermoelectric properties. Student is expected to explore new intermetallic phases through various synthetic techniques.
Students will work on a project aimed to prepare smart nanodevices for catalyzing sequences of chemical reactions to convert biomass into biorenewable fuels and chemical commodities. The nanostructured materials will be composed of organic and inorganic species that will work cooperatively to effectively promote chemical conversions behaving like nanosized assembly lines. The students will be trained in the synthesis and characterization of hybrid mesoporous materials.
Metallic nanoparticles and nanostructures are of much interest due to a broad range in applications such as optoelectronics, biosensing, and medical diagnostics amongst others. The fabrication of many of these materials is done through lithographic means typically taking place on reflective surfaces such as silicon wafers. The typical characterization methods such as SEM, TEM, and AFM are unable to directly study the optical properties of systems or follow dynamic events in real-time compared to optical microscopy techniques.
Cu2ZnSnS4 (CZTS) is one of the most promising materials for solar energy harvesting. Made of highly abundant, widely distributed and relatively biocompatible elements, and with a direct band gap of 1.5 eV, CZTS is an affordable, greener and more sustainable alternative to other semiconductors such as GaAs, CdTe, CuInS2 (CIS), or CuInxGa1-xSe2 (CIGS).
Congratulations to Andreja Bakac and Oleg Pestovsky for their new patent on "Selective Oxidation of Organic Substrates to Partially Oxidized Products", issued on August 13, 2013. U.S. Patent No. 8,507,730 can be viewed on the U.S. Patent and Trademark Office website.
Bio-oil, obtained from fast pyrolysis, is considered to be a promising renewable energy that might replace petroleum to improve the sustainability, national security, domestic economy and diversity of transportation fuels.
|Ames Lab's 12th annual Holiday Auction is just around the corner (Dec. 10) and a variety of items have found their way to the Public Affairs Office where they will be on display until the day of the auction. More items are welcome and may be dropped off any time.|
|Nik Karpinsky and Song Zhang have developed 3-D teleconferencing technology that's live, real-time and streaming at 30 frames per second. They say it took a lot of late nights to solve the technical problems associated with image capture, transmission and display. They also say the technology could be ready for smart phones in a few years.|