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Full-Text Articles in Engineering
Microfabrication Of Silicon Carbide And Metallized Polymers Using A Femtosecond Laser, Joseph Taylor Eddy
Microfabrication Of Silicon Carbide And Metallized Polymers Using A Femtosecond Laser, Joseph Taylor Eddy
Theses and Dissertations
Femtosecond lasers deliver a high peak concentration of optical power while maintaining low average power. With an accompanying optical setup, this power can be focused and used for high-precision fabrication of metallized polymers via ablation, creating conductive structures on a thin film. These lasers can also be harnessed in tandem with hydrofluoric acid and the two-photon absorption principle to selectively etch silicon carbide, a very durable and machining-resistant semiconductor with desirable properties. This thesis presents improvements made to the Laser-Assisted Chemical Etching (LACE) technique and the ablation system. ��, the two- photon absorption coefficient of silicon carbide, is measured and …
Impedance Imaging And Measurements By Micro Probes In Aqueous Environments, Tao Shang
Impedance Imaging And Measurements By Micro Probes In Aqueous Environments, Tao Shang
Theses and Dissertations
The dissertation presented here describes two research projects that may, at first glance, seem unrelated. Their unifying principle is the measurement of electrical impedance for the detection and analysis of biological materials. Impedance measurements have long been employed and studied in scientific fields, and the dissertation begins with a summary of historical methodology, applications, and terminology. Utilizing impedance measurements for microscopic imaging is the driving motivation for Scanning Impedance Imaging (SII). This technique manifests the distribution of electrical impedance inside biological tissues and is described after the dissertation's introduction. SII can provide micron-scale imaging resolution by scanning a shielded microprobe …