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DE ACS ChemVets and Delaware Valley SAS Joint November Meeting

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Delaware Biotechnology Institute

15 Innovation Way

Newark, DE 19711

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Joint Meeting of the Delaware Valley SAS and the Delaware ACS ChemVets Group

Speaker: Prof. Karl Booksh, University of Delaware

Topic: Raman Hyper-Spectral Imaging and Multivariate Curve Resolution Applied to Mineral Identification in Meteorites, Meteorite Impacts, Simulations of Mars, and a bit of Art

Time: Buffet dinner at 6:00; Presentation at 7:00; $20 for dinner; students free

Contact: Lois Weyer at Lweyer2@verizon.net


Abstract:

Karl S. Booksh, Joseph P. Smith, Marcie Wiggins, Erin Holahan, Veronica Marrero, and Frank C. Smith

Hyper-spectral Raman imaging with multivariate curve resolution is employed to determine the underlying chemical composition of four interesting samples. (1) A high pressure polymorph of TiO2 is determined to be a geomarker of large pre-Cambrian asteroid impacts. These large asteroids stuck the Earth with greater than 10 GPa pressure causing the impacted rocks to vaporize and reform as high-pressure polymorphs. (2) The geologies of the moon and Mars are still not well known. Martian and lunar meteorites provide a random sampling of the mineralogy and a test sample for the efficacy of Raman spectroscopy on future rovers. Raman imaging is applied to the analyses of two lunar and two Martian meteorites. (3) Raman spectrometers will be deployed on the Mars2020 mission to better investigate the near-surface mineralogy. Of particular interest of Martian sensing is to detect carbonaceous material, a potential indicator of life, from a large hematite background. We will show the effect of laser wavelength in optimizing this analysis. (4) Mineral content of traditional paints provides insights into the historical recipes and provenance of cultural heritage objects. Raman imaging is employed to study the changing recipes for copper chloride and copper carbonate pigments applied to buildings in the Forbidden City (China).

Karl Booksh is a Professor of Chemistry and Biochemistry at the University of Delaware. He holds a B. S. in Chemistry from the University of Alaska (1990) and a Ph.D. in Analtical Chemistry

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Delaware Biotechnology Institute

15 Innovation Way

Newark, DE 19711

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Refund Policy

Refunds up to 7 days before event

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