Download or read book Electrothermal and Optothermal Characterization of Thermal Transport in Two-dimensional Materials written by Gabriella Marie Gregson Coloyan and published by . This book was released on 2018 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: One significant challenge in the development of micro- and nano-electronic devices is thermal management. Improper thermal management can affect a device’s performance and lifetime. Nanostructured materials are one possible solution. A material’s thermal conductivity is an indicator of its viability for thermal management. However, characterizing thermal conductivity of nanostructured materials is challenging due to the inherent difficulties associated with characterizing something so small. Furthermore, thermal conductivity does not describe the entirety of thermal transport in nanostructured materials. This dissertation presents methods of thermal transport characterization in three such materials: germanane, silicon germanium nanowires, and molybdenum disulfide. The thermal conductivities of sub-micron thick polycrystalline and amorphous germanane flakess were measured and compared to simulated values, demonstrating that thermal conductivity can be used as an indicator of a material’s thermal conductivity. The thermal conductivity of silicon germanium nanowires was measured for different suspended segments along the same wire as a means of determining the mean free path and dominant scattering mechanisms in the nanowires. Finally, non-equilibrium phonon transport in molybdenum disulfide is investigated by probing the laser-induced temperature rises of different phonon modes and exploring the mechanisms behind this non-equilibrium response