Direct micro-patterning of biodegradable polymers using ultraviolet and femtosecond lasers

Carlos A. Aguilar, Yi Lu, Samuel Mao, Shaochen Chen

Research output: Contribution to journalArticlepeer-review

134 Scopus citations


Thin films of biodegradable polymeric materials, poly(ε-caprolactone) (PCL) and poly(glycolic acid) (PGA) were micro-patterned using a Ti-sapphire femtosecond pulsed laser and ArF excimer UV laser in ambient conditions. The laser-patterned polymers were characterized using a scanning electron microscope (SEM), Fourier transform infrared spectroscopy in attenuated total reflectance mode (FTIR-ATR) and X-ray photoelectron spectroscopy (XPS). In-vitro degradation tests were performed and the laser-patterned samples showed to be within one standard deviation of the control samples. Our results demonstrate that both lasers are excellent tools for micro-patterning biodegradable polymers since the bulk properties of the material can remain intact and because the direct-write method is rapid, flexible, and a chemical-free process.

Original languageBritish English
Pages (from-to)7642-7649
Number of pages8
Issue number36
StatePublished - Dec 2005


  • Biodegradable polymer
  • Excimer laser
  • Femtosecond laser
  • Hydrolytic degradation
  • Laser micromachining
  • Photochemical
  • Photothermal


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