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Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (10): 1992.

• Articles • Previous Articles     Next Articles

Preparation of Periodic Sub-micrometer Structure by Visible Laser on Poly(urethane-imide) Surface

LI Mei1, LU Qing-Hua1,2, SUI Yu1, LI Gang2, QIAN Yu1, WANG Zong-Guang1   

  1. 1. School of Chemistry and Chemical Technology, S hanghai Jiaotong University, Shanghai 200240, China;
    2. Instrumental Analysis Center, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2001-08-03 Online:2002-10-24 Published:2002-10-24

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Abstract: Poly(urethane-imide) (PUI) greatly absorbs the visible light of 532 nm because it contains azobenzene side groups. For the first time, laser-induced periodic surface structures (LIPSS) were generated on PUI films with a linearly polarized laser of 532 nm, the second harmonic generation of an Nd∶YAG laser. The absorption of the molecular chain was necessary to form LIPSS and the increase of the content of the azobenzene side groups accelerated the appearance of LIPSS. The direction of LIPSS was parallel to the polarization direction of the laser beam and the periodicity was near the wavelength used. The influence of the laser parameters, including the incidence angle, the number of laser pulse and the length of laser pulse on the configuration and the periodicity of LIPSS was studied. The obtained surface pattern was observed by atomic force microscope.

Key words: Laser-induced periodic surface structures (LIPSS), Poly(urethane-imide), Visible laser

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