期刊
APPLIED SURFACE SCIENCE
卷 256, 期 6, 页码 1708-1713出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2009.09.099
关键词
Laser interference; Femtosecond; PEDOT:PSS; Hierarchical structures; Sub-wavelength resolution
类别
资金
- Alexander von Humboldt Foundation
- Georgia Institute of Technology
- National Science Foundation [CMMI-0238788, DMR-0518079, DMR-0320740]
- University of Michigan
- Biotectix LLC
- National Academies Keck Futures Initiative on Smart Prosthetics
- MURI [W911NF-06-1-0218]
A simple optical interference method for the fabrication of simply periodic and periodic with a substructure on poly(3,4-ethylene dioxythiophene)-poly(styrene sulfonate) using femtosecond laser interference patterns is demonstrated. The femtosecond laser pulse was split by a diffractive beam splitter and overlapped with two lenses. Homogeneous periodic arrays could be fabricated even using a single laser pulse. In addition, multipulse irradiation resulted in reproducible sub-wavelength ripples oriented perpendicularly to the laser polarization with spatial period from 170 to 220 nm (around one-fourth of the laser wavelength). In addition, the observed size of the spatial period was not affected by the number of incident laser pulses or accumulated energy density. Using high energy pulses it was possible to completely remove the PEDOT:PSS layer without inducing damage to the underneath substrate. (C) 2009 Elsevier B.V. All rights reserved.
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