学位论文详细信息
Sizing of Non-Carbonaceous Nanoparticles by Time-Resolved Laser-Induced Incandescence
nanotechnology;laser-induced incandescence;nanoparticles;heat transfer;particle sizing;accommodation coefficient;molecular dynamics;free molecular conduction;Mechanical Engineering
Sipkens, Timothy A.
University of Waterloo
关键词: nanotechnology;    laser-induced incandescence;    nanoparticles;    heat transfer;    particle sizing;    accommodation coefficient;    molecular dynamics;    free molecular conduction;    Mechanical Engineering;   
Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/8890/1/Sipkens_Timothy.pdf
瑞士|英语
来源: UWSPACE Waterloo Institutional Repository
PDF
【 摘 要 】

Non-carbonaceous nanoparticles represent a growing field in science and technology. Their applications range from medicine to environmental remediation to information technology. As the functionality of nanoparticles in these roles is highly size dependent, it is critical that diagnostics be developed to accurately measure the size of these nanoparticles. Time-resolved laser-induced incandescence (TiRe-LII) is an in situ technique that can measure the size of nanoparticles without physically probing a system. The technique operates using a laser pulse that heats the nanoparticle to incandescent temperatures. The incandescence is then measured from the nanoparticles as they equilibrate with the surrounding gas. As smaller particles will cool more quickly, the size of the nanoparticles can be inferred by modeling the incandescence or, more commonly, the effective temperature decay of the nanoparticles. The present work summarizes attempts to extend the use of TiRe-LII from its original application on soot to non-carbonaceous particles. This will be done by examining experimental data from three non-carbonaceous nanoparticles: molybdenum, silicon, and iron. This includes descriptions of the TiRe-LII models and statistical techniques required to robustly infer parameters and their uncertainties. As one of the major setbacks in extending this technique to other materials is the determination of the thermal accommodation coefficient (TAC), this work also focusses on determining that parameter both from experimental data and molecular dynamics simulations.

【 预 览 】
附件列表
Files Size Format View
Sizing of Non-Carbonaceous Nanoparticles by Time-Resolved Laser-Induced Incandescence 3885KB PDF download
  文献评价指标  
  下载次数:20次 浏览次数:24次