FIP Seminar: Organic and Hybrid Organic-Inorganic Thin Film Deposition by Resonant Infrared, Matrix-Assisted Pulsed Laser Evaporation

Apr 12

Wednesday, April 12, 2017

12:00 pm - 1:00 pm
Hudson Hall 125


Dr. Adrienne Stiff-Roberts - Associate Professor of Electrical and Computer Engineering, Duke University

Over the past fifteen years, matrix-assisted pulsed laser evaporation (MAPLE) has been developed to deposit organic thin films, inorganic nanoparticles, and hybrid organic-inorganic nanocomposites. One variation of the MAPLE technique, resonant infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE), reduces the laser energy (e.g., Er:YAG laser ~2.94¿m peak wavelength) in order to minimize polymer degradation. In addition, because the frequency of the IR laser energy is resonant with OH bond vibrational modes in water, a frozen emulsion (comprising a mixture of the guest material dissolved in an organic solvent and water) is used as the target. Therefore, the unique advantage of emulsion-based RIR-MAPLE is that most of the energy from the IR laser is absorbed by water in the frozen emulsion, which evaporates and gently transfers the guest material to the substrate with minimal solvent exposure and degradation. In this talk, RIR-MAPLE deposition of organic and hybrid films will be described, as well as application to energy materials. Adrienne D. Stiff-Roberts is Associate Professor of Electrical and Computer Engineering at Duke University, and she currently serves as the Education Director of the Research Triangle Materials Research Science and Engineering Center (RT-MRSEC). Her current research interests include polymer, nanoparticle, and organic/inorganic hybrid nanocomposite thin film deposition by resonant-infrared matrix-assisted pulsed laser evaporation

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