Anna Hoang receives prestigious NSF graduate fellowship to support her Ph.D. research
May 24, 2010
Anna Hoang, a Ph.D. student at the UCLA Mechanical and Aerospace Engineering Department, received a prestigious NSF graduate fellowship to support her Ph.D. research from the National Science Foundation's Graduate Research Fellowship Program (GRFP). (To see her and other 2010 winners, please visit NSF Fastlane.)
Hoang’s research (from her abstract):
"For wetting fluids, a microscopic film, which is known as the precursor film, exists at the front of the moving contact line. The structure of this thin film has been studied theoretically, but previous experimental investigations were limited by the resolution of the measurement system (lateral or vertical) required to capture the complete scope of this feature. We studied the evolution of the profile of a spreading droplet near the moving contact line using a total internal reflection fluorescence microscope (TIR-FM). The features of the macroscopic drop (spherical cap), wedge region, and precursor film were investigated within a single experiment. This was made possible by the lateral resolution and dynamic range of our technique. The dynamic characteristics of the precursor films have a good agreement with the available theoretical results. The microscopic dynamics of liquids spreading on solids have many industrial and technical applications such as coating processes, inkjet printing, and cell manipulation. Investigation of the thin precursor film is especially important for developing a fundamental understanding of fluids spreading on solids."
Hoang was a SINAM participant during the summers of 2007 and 2008 working on the same project. She has been working with MAE Professor Pirouz Kavehpour as her research advisor for the past 3 years (since the start of her involvement with SINAM in 2007).