4.6 Article

Quadratic nonlinear optics to assess the morphology of riboflavin doped chitosan for eco-friendly lithography

期刊

OPTICAL MATERIALS
卷 80, 期 -, 页码 30-36

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ELSEVIER
DOI: 10.1016/j.optmat.2018.04.007

关键词

Nonlinear optics; Second harmonic generation; Green lithography; Riboflavin; Chitosan

资金

  1. LABEX iMUST of Universite de Lyon within the program Investissements d'Avenir [ANR-11-IDEX-0007, ANR-10-LABX-0064]
  2. Pulsalys
  3. EEA doctoral school
  4. NanoLyon platform
  5. France-Brazil CAPES-COFECUB program [Sv852-15]

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We report the use of the Second Harmonic Generation response from a riboflavin doped chitosan film as a characterization method of the film morphology. This film is of particular interest in the development of new and bio-sourced material for eco-friendly UV lithography. The method allows us to determine how riboflavin is distributed as a function of film depth in the sample. This possibility is of importance in order to have a better understanding of the riboflavin influence in chitosan films during the lithography process. On the contrary, linear optical techniques provide no information beyond the mere confirmation of the riboflavin presence.

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