O Departamento de Engenharia Mecânica promove a palestra “Excimer Laser-Tissue Interactions for Biomaterials Processing and Optical Sensing”, a ser proferida pelo Prof. David Hahn, Chefe do Departamento de Engenharia Mecânica e Aeroespacial da Universidade da Flórida. Será no dia 18/06 (segunda-feira) às 10h30 na Sala MC-02 (Sala de Apresentações do Prédio da Mecânica).
At a wavelength of 193 nm, the ArF excimer laser has a sufficiently high photon energy to photochemically break molecular bonds in most biological materials. The resulting photochemical interactions between the excimer laser and tissue can enable tissue processing, such as the case with laser refractive laser surgery, commonly known as LASIK or PRK, as well as provide opportunities for advanced sensing schemes with goals of cancer detection or rapid materials analysis. This seminar will discuss the role of the excimer laser in LASIK, with emphasis on the physical interactions between the laser and tissue, as well as opportunities for modeling and real-time feedback during refractive surgery.
Moving beyond tissue processing, we will discuss recent work on excimer laser perturbation of organic materials to create a new spectroscopic scheme to extract more information content than possible from traditional spectroscopic methods such as Raman and fluorescence spectroscopies. We will present recent data using this approach for early cancer detection, as well as for potential imaging methodologies.
David W. Hahn is currently Knox T. Millsaps Professor and Department Chair in the Department of Mechanical and Aerospace Engineering, University of Florida. David joined the University of Florida in 1998. His research and teaching interests are in the general area of thermal sciences, with on-going activities in solar-thermal chemistry and biomedical optical-based diagnostics. He has published over 80 journal papers and book chapters, and currently serves as Associate Editor for Applied Spectroscopy and on the Editorial Board of Spectrochimica Acta Part B. While at the University of Florida, he has won the College of Engineering 2007-2008 Teacher/Scholar of the Year Award, and the 2009-2010 Doctoral Dissertation Advisor/Mentoring Award.
He was recipient of the 2011 Lester W. Strock Award from the Society of Applied Spectroscopy for his body of work on laser-induced plasma spectroscopy. Prior to joining UF, David was a researcher at Sandia National Laboratories (1994-1998) and an NRC postdoctoral associate at the US FDA, Center for Devices and Radiological Health (1993-1994). He received his B.S. and Ph.D. degrees in Mechanical Engineering from Louisiana State University.