期刊
APPLIED SURFACE SCIENCE
卷 485, 期 -, 页码 141-146出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2019.04.149
关键词
DLIP; Fluorescent; Polymer films; Laser structuring; PMAA; Silver nanoclusters
类别
资金
- CONICET
- FONCyT
- SeCyT-UNC
- MinCyT-Cordoba
- CONICET-Argentina
Hybrid films of poly (methacrylic acid) (PMAA) and silver fluorescent nanoclusters were structured by the Direct Laser Interference Patterning technique (DLIP) using few nanosecond laser pulses (355 nm) to obtain an arranged and well-defined periodic surface pattern. It is shown that the films of neat PMAA are not structured by irradiation at 355 nm due to its low absorbance at this wavelength. However, the silver nanoclusters act as chromophores increasing the absorbance of the film and allowing the surface patterning. Also, the interaction of the laser beam with a film of PMAA doped with Ag+ induces the formation of fluorescent silver nanoclusters and the subsequent surface patterning. The patterned films maintain the luminescent properties of the PMAA/Ag nanoclusters in solution. The structured and unstructured films were characterized by optical, atomic force and spectral laser confocal scanning microscopy showing highly oriented lines patterning already after just one laser pulse.
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